Refactor s3select to support parquet. (#7023)

Also handle pretty formatted JSON documents.

.travis.yml

@@ -16,22 +16,24 @@ matrix:
       sudo: required
       env:
         - ARCH=x86_64
+        - CGO_ENABLED=0
       go: 1.11.4
       script:
         - make
         - diff -au <(gofmt -s -d cmd) <(printf "")
         - diff -au <(gofmt -s -d pkg) <(printf "")
-        - for d in $(go list ./... | grep -v browser); do go test -v -race --timeout 15m "$d"; done
+        - for d in $(go list ./... | grep -v browser); do CGO_ENABLED=1 go test -v -race --timeout 15m "$d"; done
         - make verify
         - make coverage
         - cd browser && yarn && yarn test && cd ..
     - os: windows
       env:
         - ARCH=x86_64
+        - CGO_ENABLED=0
       go: 1.11.4
       script:
         - go build --ldflags="$(go run buildscripts/gen-ldflags.go)" -o %GOPATH%\bin\minio.exe
-        - for d in $(go list ./... | grep -v browser); do go test -v -race --timeout 20m "$d"; done
+        - for d in $(go list ./... | grep -v browser); do CGO_ENABLED=1 go test -v -race --timeout 20m "$d"; done
         - bash buildscripts/go-coverage.sh
 
 before_script:

Makefile

@@ -60,7 +60,7 @@ spelling:
 check: test
 test: verifiers build
 	@echo "Running unit tests"
-	@go test -tags kqueue ./...
+	@CGO_ENABLED=0 go test -tags kqueue ./...
 
 verify: build
 	@echo "Verifying build"

buildscripts/go-coverage.sh

@@ -4,7 +4,7 @@ set -e
 echo "" > coverage.txt
 
 for d in $(go list ./... | grep -v browser); do
-    go test -v -coverprofile=profile.out -covermode=atomic "$d"
+    CGO_ENABLED=0 go test -v -coverprofile=profile.out -covermode=atomic "$d"
     if [ -f profile.out ]; then
         cat profile.out >> coverage.txt
         rm profile.out

cmd/api-errors.go

@@ -28,8 +28,6 @@ import (
 	"github.com/minio/minio/pkg/dns"
 	"github.com/minio/minio/pkg/event"
 	"github.com/minio/minio/pkg/hash"
-	"github.com/minio/minio/pkg/s3select"
-	"github.com/minio/minio/pkg/s3select/format"
 )
 
 // APIError structure
@@ -1512,168 +1510,6 @@ func toAPIErrorCode(ctx context.Context, err error) (apiErr APIErrorCode) {
 	case errOperationTimedOut, context.Canceled, context.DeadlineExceeded:
 		apiErr = ErrOperationTimedOut
 	}
-	switch err {
-	case s3select.ErrBusy:
-		apiErr = ErrBusy
-	case s3select.ErrUnauthorizedAccess:
-		apiErr = ErrUnauthorizedAccess
-	case s3select.ErrExpressionTooLong:
-		apiErr = ErrExpressionTooLong
-	case s3select.ErrIllegalSQLFunctionArgument:
-		apiErr = ErrIllegalSQLFunctionArgument
-	case s3select.ErrInvalidKeyPath:
-		apiErr = ErrInvalidKeyPath
-	case s3select.ErrInvalidCompressionFormat:
-		apiErr = ErrInvalidCompressionFormat
-	case s3select.ErrInvalidFileHeaderInfo:
-		apiErr = ErrInvalidFileHeaderInfo
-	case s3select.ErrInvalidJSONType:
-		apiErr = ErrInvalidJSONType
-	case s3select.ErrInvalidQuoteFields:
-		apiErr = ErrInvalidQuoteFields
-	case s3select.ErrInvalidRequestParameter:
-		apiErr = ErrInvalidRequestParameter
-	case s3select.ErrInvalidDataType:
-		apiErr = ErrInvalidDataType
-	case s3select.ErrInvalidTextEncoding:
-		apiErr = ErrInvalidTextEncoding
-	case s3select.ErrInvalidTableAlias:
-		apiErr = ErrInvalidTableAlias
-	case s3select.ErrMissingRequiredParameter:
-		apiErr = ErrMissingRequiredParameter
-	case s3select.ErrObjectSerializationConflict:
-		apiErr = ErrObjectSerializationConflict
-	case s3select.ErrUnsupportedSQLOperation:
-		apiErr = ErrUnsupportedSQLOperation
-	case s3select.ErrUnsupportedSQLStructure:
-		apiErr = ErrUnsupportedSQLStructure
-	case s3select.ErrUnsupportedSyntax:
-		apiErr = ErrUnsupportedSyntax
-	case s3select.ErrUnsupportedRangeHeader:
-		apiErr = ErrUnsupportedRangeHeader
-	case s3select.ErrLexerInvalidChar:
-		apiErr = ErrLexerInvalidChar
-	case s3select.ErrLexerInvalidOperator:
-		apiErr = ErrLexerInvalidOperator
-	case s3select.ErrLexerInvalidLiteral:
-		apiErr = ErrLexerInvalidLiteral
-	case s3select.ErrLexerInvalidIONLiteral:
-		apiErr = ErrLexerInvalidIONLiteral
-	case s3select.ErrParseExpectedDatePart:
-		apiErr = ErrParseExpectedDatePart
-	case s3select.ErrParseExpectedKeyword:
-		apiErr = ErrParseExpectedKeyword
-	case s3select.ErrParseExpectedTokenType:
-		apiErr = ErrParseExpectedTokenType
-	case s3select.ErrParseExpected2TokenTypes:
-		apiErr = ErrParseExpected2TokenTypes
-	case s3select.ErrParseExpectedNumber:
-		apiErr = ErrParseExpectedNumber
-	case s3select.ErrParseExpectedRightParenBuiltinFunctionCall:
-		apiErr = ErrParseExpectedRightParenBuiltinFunctionCall
-	case s3select.ErrParseExpectedTypeName:
-		apiErr = ErrParseExpectedTypeName
-	case s3select.ErrParseExpectedWhenClause:
-		apiErr = ErrParseExpectedWhenClause
-	case s3select.ErrParseUnsupportedToken:
-		apiErr = ErrParseUnsupportedToken
-	case s3select.ErrParseUnsupportedLiteralsGroupBy:
-		apiErr = ErrParseUnsupportedLiteralsGroupBy
-	case s3select.ErrParseExpectedMember:
-		apiErr = ErrParseExpectedMember
-	case s3select.ErrParseUnsupportedSelect:
-		apiErr = ErrParseUnsupportedSelect
-	case s3select.ErrParseUnsupportedCase:
-		apiErr = ErrParseUnsupportedCase
-	case s3select.ErrParseUnsupportedCaseClause:
-		apiErr = ErrParseUnsupportedCaseClause
-	case s3select.ErrParseUnsupportedAlias:
-		apiErr = ErrParseUnsupportedAlias
-	case s3select.ErrParseUnsupportedSyntax:
-		apiErr = ErrParseUnsupportedSyntax
-	case s3select.ErrParseUnknownOperator:
-		apiErr = ErrParseUnknownOperator
-	case s3select.ErrParseMissingIdentAfterAt:
-		apiErr = ErrParseMissingIdentAfterAt
-	case s3select.ErrParseUnexpectedOperator:
-		apiErr = ErrParseUnexpectedOperator
-	case s3select.ErrParseUnexpectedTerm:
-		apiErr = ErrParseUnexpectedTerm
-	case s3select.ErrParseUnexpectedToken:
-		apiErr = ErrParseUnexpectedToken
-	case s3select.ErrParseUnexpectedKeyword:
-		apiErr = ErrParseUnexpectedKeyword
-	case s3select.ErrParseExpectedExpression:
-		apiErr = ErrParseExpectedExpression
-	case s3select.ErrParseExpectedLeftParenAfterCast:
-		apiErr = ErrParseExpectedLeftParenAfterCast
-	case s3select.ErrParseExpectedLeftParenValueConstructor:
-		apiErr = ErrParseExpectedLeftParenValueConstructor
-	case s3select.ErrParseExpectedLeftParenBuiltinFunctionCall:
-		apiErr = ErrParseExpectedLeftParenBuiltinFunctionCall
-	case s3select.ErrParseExpectedArgumentDelimiter:
-		apiErr = ErrParseExpectedArgumentDelimiter
-	case s3select.ErrParseCastArity:
-		apiErr = ErrParseCastArity
-	case s3select.ErrParseInvalidTypeParam:
-		apiErr = ErrParseInvalidTypeParam
-	case s3select.ErrParseEmptySelect:
-		apiErr = ErrParseEmptySelect
-	case s3select.ErrParseSelectMissingFrom:
-		apiErr = ErrParseSelectMissingFrom
-	case s3select.ErrParseExpectedIdentForGroupName:
-		apiErr = ErrParseExpectedIdentForGroupName
-	case s3select.ErrParseExpectedIdentForAlias:
-		apiErr = ErrParseExpectedIdentForAlias
-	case s3select.ErrParseUnsupportedCallWithStar:
-		apiErr = ErrParseUnsupportedCallWithStar
-	case s3select.ErrParseNonUnaryAgregateFunctionCall:
-		apiErr = ErrParseNonUnaryAgregateFunctionCall
-	case s3select.ErrParseMalformedJoin:
-		apiErr = ErrParseMalformedJoin
-	case s3select.ErrParseExpectedIdentForAt:
-		apiErr = ErrParseExpectedIdentForAt
-	case s3select.ErrParseAsteriskIsNotAloneInSelectList:
-		apiErr = ErrParseAsteriskIsNotAloneInSelectList
-	case s3select.ErrParseCannotMixSqbAndWildcardInSelectList:
-		apiErr = ErrParseCannotMixSqbAndWildcardInSelectList
-	case s3select.ErrParseInvalidContextForWildcardInSelectList:
-		apiErr = ErrParseInvalidContextForWildcardInSelectList
-	case s3select.ErrIncorrectSQLFunctionArgumentType:
-		apiErr = ErrIncorrectSQLFunctionArgumentType
-	case s3select.ErrValueParseFailure:
-		apiErr = ErrValueParseFailure
-	case s3select.ErrIntegerOverflow:
-		apiErr = ErrIntegerOverflow
-	case s3select.ErrLikeInvalidInputs:
-		apiErr = ErrLikeInvalidInputs
-	case s3select.ErrCastFailed:
-		apiErr = ErrCastFailed
-	case s3select.ErrInvalidCast:
-		apiErr = ErrInvalidCast
-	case s3select.ErrEvaluatorInvalidTimestampFormatPattern:
-		apiErr = ErrEvaluatorInvalidTimestampFormatPattern
-	case s3select.ErrEvaluatorInvalidTimestampFormatPatternSymbolForParsing:
-		apiErr = ErrEvaluatorInvalidTimestampFormatPatternSymbolForParsing
-	case s3select.ErrEvaluatorTimestampFormatPatternDuplicateFields:
-		apiErr = ErrEvaluatorTimestampFormatPatternDuplicateFields
-	case s3select.ErrEvaluatorTimestampFormatPatternHourClockAmPmMismatch:
-		apiErr = ErrEvaluatorTimestampFormatPatternHourClockAmPmMismatch
-	case s3select.ErrEvaluatorUnterminatedTimestampFormatPatternToken:
-		apiErr = ErrEvaluatorUnterminatedTimestampFormatPatternToken
-	case s3select.ErrEvaluatorInvalidTimestampFormatPatternToken:
-		apiErr = ErrEvaluatorInvalidTimestampFormatPatternToken
-	case s3select.ErrEvaluatorInvalidTimestampFormatPatternSymbol:
-		apiErr = ErrEvaluatorInvalidTimestampFormatPatternSymbol
-	case s3select.ErrEvaluatorBindingDoesNotExist:
-		apiErr = ErrEvaluatorBindingDoesNotExist
-	case s3select.ErrMissingHeaders:
-		apiErr = ErrMissingHeaders
-	case format.ErrParseInvalidPathComponent:
-		apiErr = ErrMissingHeaders
-	case format.ErrInvalidColumnIndex:
-		apiErr = ErrInvalidColumnIndex
-	}
 
 	// Compression errors
 	switch err {

cmd/object-handlers.go

@@ -33,7 +33,6 @@ import (
 
 	snappy "github.com/golang/snappy"
 	"github.com/gorilla/mux"
-	"github.com/klauspost/readahead"
 	miniogo "github.com/minio/minio-go"
 	"github.com/minio/minio-go/pkg/encrypt"
 	"github.com/minio/minio/cmd/crypto"
@@ -106,6 +105,12 @@ func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r
 		writeErrorResponseHeadersOnly(w, toAPIErrorCode(ctx, err))
 		return
 	}
+
+	getObjectInfo := objectAPI.GetObjectInfo
+	if api.CacheAPI() != nil {
+		getObjectInfo = api.CacheAPI().GetObjectInfo
+	}
+
 	// Check for auth type to return S3 compatible error.
 	// type to return the correct error (NoSuchKey vs AccessDenied)
 	if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, object); s3Error != ErrNone {
@@ -129,11 +134,6 @@ func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r
 				ConditionValues: getConditionValues(r, ""),
 				IsOwner:         false,
 			}) {
-				getObjectInfo := objectAPI.GetObjectInfo
-				if api.CacheAPI() != nil {
-					getObjectInfo = api.CacheAPI().GetObjectInfo
-				}
-
 				_, err = getObjectInfo(ctx, bucket, object, opts)
 				if toAPIErrorCode(ctx, err) == ErrNoSuchKey {
 					s3Error = ErrNoSuchKey
@@ -156,18 +156,14 @@ func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r
 		return
 	}
 
-	var selectReq s3select.ObjectSelectRequest
-	if err := xmlDecoder(r.Body, &selectReq, r.ContentLength); err != nil {
-		writeErrorResponse(w, ErrMalformedXML, r.URL, guessIsBrowserReq(r))
-		return
+	s3Select, err := s3select.NewS3Select(r.Body)
+	if err != nil {
+		if serr, ok := err.(s3select.SelectError); ok {
+			w.WriteHeader(serr.HTTPStatusCode())
+			w.Write(s3select.NewErrorMessage(serr.ErrorCode(), serr.ErrorMessage()))
+		} else {
+			writeErrorResponse(w, ErrInternalError, r.URL, guessIsBrowserReq(r))
 		}
-
-	if !strings.EqualFold(string(selectReq.ExpressionType), "SQL") {
-		writeErrorResponse(w, ErrInvalidExpressionType, r.URL, guessIsBrowserReq(r))
-		return
-	}
-	if len(selectReq.Expression) >= s3select.MaxExpressionLength {
-		writeErrorResponse(w, ErrExpressionTooLong, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -175,123 +171,38 @@ func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r
 	if api.CacheAPI() != nil {
 		getObjectNInfo = api.CacheAPI().GetObjectNInfo
 	}
+	getObject := func(offset, length int64) (rc io.ReadCloser, err error) {
+		isSuffixLength := false
+		if offset < 0 {
+			isSuffixLength = true
+		}
+		rs := &HTTPRangeSpec{
+			IsSuffixLength: isSuffixLength,
+			Start:          offset,
+			End:            length,
+		}
 
-	gr, err := getObjectNInfo(ctx, bucket, object, nil, r.Header, readLock, opts)
+		return getObjectNInfo(ctx, bucket, object, rs, r.Header, readLock, ObjectOptions{})
+	}
+
+	if err = s3Select.Open(getObject); err != nil {
+		if serr, ok := err.(s3select.SelectError); ok {
+			w.WriteHeader(serr.HTTPStatusCode())
+			w.Write(s3select.NewErrorMessage(serr.ErrorCode(), serr.ErrorMessage()))
+		} else {
+			writeErrorResponse(w, ErrInternalError, r.URL, guessIsBrowserReq(r))
+		}
+		return
+	}
+
+	s3Select.Evaluate(w)
+	s3Select.Close()
+
+	objInfo, err := getObjectInfo(ctx, bucket, object, opts)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
+		logger.LogIf(ctx, err)
 		return
 	}
-	defer gr.Close()
-
-	objInfo := gr.ObjInfo
-
-	if selectReq.InputSerialization.CompressionType == s3select.SelectCompressionGZIP {
-		if !strings.Contains(objInfo.ContentType, "gzip") {
-			writeErrorResponse(w, ErrInvalidDataSource, r.URL, guessIsBrowserReq(r))
-			return
-		}
-	}
-	if selectReq.InputSerialization.CompressionType == s3select.SelectCompressionBZIP {
-		if !strings.Contains(objInfo.ContentType, "bzip") {
-			writeErrorResponse(w, ErrInvalidDataSource, r.URL, guessIsBrowserReq(r))
-			return
-		}
-	}
-	if selectReq.InputSerialization.CompressionType == "" {
-		selectReq.InputSerialization.CompressionType = s3select.SelectCompressionNONE
-		if !strings.Contains(objInfo.ContentType, "text/csv") && !strings.Contains(objInfo.ContentType, "application/json") {
-			writeErrorResponse(w, ErrInvalidDataSource, r.URL, guessIsBrowserReq(r))
-			return
-		}
-	}
-	if !strings.EqualFold(string(selectReq.ExpressionType), "SQL") {
-		writeErrorResponse(w, ErrInvalidExpressionType, r.URL, guessIsBrowserReq(r))
-		return
-	}
-	if len(selectReq.Expression) >= s3select.MaxExpressionLength {
-		writeErrorResponse(w, ErrExpressionTooLong, r.URL, guessIsBrowserReq(r))
-		return
-	}
-	if selectReq.InputSerialization.CSV == nil && selectReq.InputSerialization.JSON == nil {
-		writeErrorResponse(w, ErrInvalidRequestParameter, r.URL, guessIsBrowserReq(r))
-		return
-	}
-	if selectReq.OutputSerialization.CSV == nil && selectReq.OutputSerialization.JSON == nil {
-		writeErrorResponse(w, ErrInvalidRequestParameter, r.URL, guessIsBrowserReq(r))
-		return
-	}
-
-	if selectReq.InputSerialization.CSV != nil {
-		if selectReq.InputSerialization.CSV.FileHeaderInfo != s3select.CSVFileHeaderInfoUse &&
-			selectReq.InputSerialization.CSV.FileHeaderInfo != s3select.CSVFileHeaderInfoNone &&
-			selectReq.InputSerialization.CSV.FileHeaderInfo != s3select.CSVFileHeaderInfoIgnore &&
-			selectReq.InputSerialization.CSV.FileHeaderInfo != "" {
-			writeErrorResponse(w, ErrInvalidFileHeaderInfo, r.URL, guessIsBrowserReq(r))
-			return
-		}
-		if selectReq.OutputSerialization.CSV != nil {
-			if selectReq.OutputSerialization.CSV.QuoteFields != s3select.CSVQuoteFieldsAlways &&
-				selectReq.OutputSerialization.CSV.QuoteFields != s3select.CSVQuoteFieldsAsNeeded &&
-				selectReq.OutputSerialization.CSV.QuoteFields != "" {
-				writeErrorResponse(w, ErrInvalidQuoteFields, r.URL, guessIsBrowserReq(r))
-				return
-			}
-		}
-		if len(selectReq.InputSerialization.CSV.RecordDelimiter) > 2 {
-			writeErrorResponse(w, ErrInvalidRequestParameter, r.URL, guessIsBrowserReq(r))
-			return
-		}
-
-	}
-	if selectReq.InputSerialization.JSON != nil {
-		if selectReq.InputSerialization.JSON.Type != s3select.JSONLinesType {
-			writeErrorResponse(w, ErrInvalidJSONType, r.URL, guessIsBrowserReq(r))
-			return
-		}
-
-	}
-
-	// Set encryption response headers
-	if objectAPI.IsEncryptionSupported() {
-		objInfo.UserDefined = CleanMinioInternalMetadataKeys(objInfo.UserDefined)
-		if crypto.IsEncrypted(objInfo.UserDefined) {
-			switch {
-			case crypto.S3.IsEncrypted(objInfo.UserDefined):
-				w.Header().Set(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
-			case crypto.SSEC.IsEncrypted(objInfo.UserDefined):
-				w.Header().Set(crypto.SSECAlgorithm, r.Header.Get(crypto.SSECAlgorithm))
-				w.Header().Set(crypto.SSECKeyMD5, r.Header.Get(crypto.SSECKeyMD5))
-			}
-		}
-	}
-
-	reader := readahead.NewReader(gr)
-	defer reader.Close()
-
-	size := objInfo.Size
-	if objInfo.IsCompressed() {
-		size = objInfo.GetActualSize()
-		if size < 0 {
-			writeErrorResponse(w, toAPIErrorCode(ctx, errInvalidDecompressedSize), r.URL, guessIsBrowserReq(r))
-			return
-		}
-	}
-
-	s3s, err := s3select.New(reader, size, selectReq)
-	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
-		return
-	}
-
-	// Parses the select query and checks for an error
-	_, _, _, _, _, _, err = s3select.ParseSelect(s3s)
-	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
-		return
-	}
-
-	// Executes the query on data-set
-	s3select.Execute(w, s3s)
 
 	// Get host and port from Request.RemoteAddr.
 	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))

pkg/ioutil/delimited-reader.go

@@ -1,87 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package ioutil
-
-import (
-	"bufio"
-	"io"
-)
-
-var (
-	nByte byte = 10 // the byte that corresponds to the '\n' rune.
-	rByte byte = 13 // the byte that corresponds to the '\r' rune.
-)
-
-// DelimitedReader reduces the custom delimiter to `\n`.
-type DelimitedReader struct {
-	r           *bufio.Reader
-	delimiter   []rune // Select can have upto 2 characters as delimiter.
-	assignEmpty bool   // Decides whether the next read byte should be discarded.
-}
-
-// NewDelimitedReader detects the custom delimiter and replaces with `\n`.
-func NewDelimitedReader(r io.Reader, delimiter []rune) *DelimitedReader {
-	return &DelimitedReader{r: bufio.NewReader(r), delimiter: delimiter, assignEmpty: false}
-}
-
-// Reads and replaces the custom delimiter with `\n`.
-func (r *DelimitedReader) Read(p []byte) (n int, err error) {
-	n, err = r.r.Read(p)
-	if err != nil {
-		return
-	}
-	for i, b := range p {
-		if r.assignEmpty {
-			swapAndNullify(p, i)
-			r.assignEmpty = false
-			continue
-		}
-		if b == rByte && rune(b) != r.delimiter[0] {
-			// Replace the carriage returns with `\n`.
-			// Mac styled csv will have `\r` as their record delimiter.
-			p[i] = nByte
-		} else if rune(b) == r.delimiter[0] { // Eg, `\r\n`,`ab`,`a` are valid delimiters
-			if i+1 == len(p) && len(r.delimiter) > 1 {
-				// If the first delimiter match falls on the boundary,
-				// Peek the next byte and if it matches, discard it in the next byte read.
-				if nextByte, nerr := r.r.Peek(1); nerr == nil {
-					if rune(nextByte[0]) == r.delimiter[1] {
-						p[i] = nByte
-						// To Discard in the next read.
-						r.assignEmpty = true
-					}
-				}
-			} else if len(r.delimiter) > 1 && rune(p[i+1]) == r.delimiter[1] {
-				// The second delimiter falls in the same chunk.
-				p[i] = nByte
-				r.assignEmpty = true
-			} else if len(r.delimiter) == 1 {
-				// Replace with `\n` incase of single charecter delimiter match.
-				p[i] = nByte
-			}
-		}
-	}
-	return
-}
-
-// Occupy the first byte space and nullify the last byte.
-func swapAndNullify(p []byte, n int) {
-	for i := n; i < len(p)-1; i++ {
-		p[i] = p[i+1]
-	}
-	p[len(p)-1] = 0
-}

pkg/ioutil/delimited-reader_test.go

@@ -1,83 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2016, 2017, 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package ioutil
-
-import (
-	"bytes"
-	"io"
-	"strings"
-	"testing"
-)
-
-// Test for DelimitedCSVReader.
-func TestDelimitedReader(t *testing.T) {
-	expected := "username,age\nbanana,12\ncarrot,23\napple,34\nbrinjal,90\nraddish,45"
-
-	inputs := []struct {
-		inputcsv  string
-		delimiter string
-		chunkSize int
-	}{
-		// case 1 - with default `\n` delimiter.
-		{"username,age\nbanana,12\ncarrot,23\napple,34\nbrinjal,90\nraddish,45", "\n", 10},
-		// case 2 - with carriage return `\r` which should be replaced with `\n` by default.
-		{"username,age\rbanana,12\rcarrot,23\rapple,34\rbrinjal,90\rraddish,45", "\n", 10},
-		// case 3 - with a double character delimiter (octals).
-		{"username,age\r\nbanana,12\r\ncarrot,23\r\napple,34\r\nbrinjal,90\r\nraddish,45", "\r\n", 10},
-		// case 4 - with a double character delimiter.
-		{"username,agexvbanana,12xvcarrot,23xvapple,34xvbrinjal,90xvraddish,45", "xv", 10},
-		// case 5 - with a double character delimiter `\t `
-		{"username,age\t banana,12\t carrot,23\t apple,34\t brinjal,90\t raddish,45", "\t ", 10},
-		// case 6 - This is a special case where the first delimiter match falls in the 13'th byte space
-		// ie, the last byte space of the read chunk, In this case the reader should peek in the next byte
-		// and replace with `\n`.
-		{"username,agexxbanana,12xxcarrot,23xxapple,34xxbrinjal,90xxraddish,45", "xx", 13},
-	}
-
-	for c, input := range inputs {
-		var readcsv []byte
-		var err error
-		delimitedReader := NewDelimitedReader(strings.NewReader(input.inputcsv), []rune(input.delimiter))
-		for err == nil {
-			chunk := make([]byte, input.chunkSize)
-			_, err = delimitedReader.Read(chunk)
-			readcsv = append(readcsv, chunk...)
-		}
-		if err != io.EOF {
-			t.Fatalf("Case %d: Error in delimited read", c+1)
-		}
-		expected := []byte(expected)
-		cleanCsv := removeNulls(readcsv)
-		if !bytes.Equal(cleanCsv, expected) {
-			t.Fatalf("Case %d: Expected the delimited csv to be `%s`, but instead found `%s`", c+1, string(expected), string(cleanCsv))
-		}
-	}
-
-}
-
-// Removes all the tailing nulls in chunks.
-// Null chunks will be assigned if there is a reduction
-// Eg, When `xv` is reduced to `\n`, the last byte is nullified.
-func removeNulls(csv []byte) []byte {
-	cleanCsv := []byte{}
-	for _, p := range csv {
-		if p != 0 {
-			cleanCsv = append(cleanCsv, p)
-		}
-	}
-	return cleanCsv
-}

pkg/s3select/csv/args.go

@@ -0,0 +1,190 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package csv
+
+import (
+	"encoding/xml"
+	"fmt"
+	"strings"
+)
+
+const (
+	none   = "none"
+	use    = "use"
+	ignore = "ignore"
+
+	defaultRecordDelimiter      = "\n"
+	defaultFieldDelimiter       = ","
+	defaultQuoteCharacter       = `"`
+	defaultQuoteEscapeCharacter = `"`
+	defaultCommentCharacter     = "#"
+
+	always   = "always"
+	asneeded = "asneeded"
+)
+
+// ReaderArgs - represents elements inside <InputSerialization><CSV> in request XML.
+type ReaderArgs struct {
+	FileHeaderInfo             string `xml:"FileHeaderInfo"`
+	RecordDelimiter            string `xml:"RecordDelimiter"`
+	FieldDelimiter             string `xml:"FieldDelimiter"`
+	QuoteCharacter             string `xml:"QuoteCharacter"`
+	QuoteEscapeCharacter       string `xml:"QuoteEscapeCharacter"`
+	CommentCharacter           string `xml:"Comments"`
+	AllowQuotedRecordDelimiter bool   `xml:"AllowQuotedRecordDelimiter"`
+	unmarshaled                bool
+}
+
+// IsEmpty - returns whether reader args is empty or not.
+func (args *ReaderArgs) IsEmpty() bool {
+	return !args.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (args *ReaderArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subReaderArgs ReaderArgs
+	parsedArgs := subReaderArgs{}
+	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
+		return err
+	}
+
+	parsedArgs.FileHeaderInfo = strings.ToLower(parsedArgs.FileHeaderInfo)
+	switch parsedArgs.FileHeaderInfo {
+	case none, use, ignore:
+	default:
+		return errInvalidFileHeaderInfo(fmt.Errorf("invalid FileHeaderInfo '%v'", parsedArgs.FileHeaderInfo))
+	}
+
+	switch len(parsedArgs.RecordDelimiter) {
+	case 0:
+		parsedArgs.RecordDelimiter = defaultRecordDelimiter
+	case 1, 2:
+	default:
+		return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
+	}
+
+	switch len(parsedArgs.FieldDelimiter) {
+	case 0:
+		parsedArgs.FieldDelimiter = defaultFieldDelimiter
+	case 1:
+	default:
+		return fmt.Errorf("invalid FieldDelimiter '%v'", parsedArgs.FieldDelimiter)
+	}
+
+	switch parsedArgs.QuoteCharacter {
+	case "":
+		parsedArgs.QuoteCharacter = defaultQuoteCharacter
+	case defaultQuoteCharacter:
+	default:
+		return fmt.Errorf("unsupported QuoteCharacter '%v'", parsedArgs.QuoteCharacter)
+	}
+
+	switch parsedArgs.QuoteEscapeCharacter {
+	case "":
+		parsedArgs.QuoteEscapeCharacter = defaultQuoteEscapeCharacter
+	case defaultQuoteEscapeCharacter:
+	default:
+		return fmt.Errorf("unsupported QuoteEscapeCharacter '%v'", parsedArgs.QuoteEscapeCharacter)
+	}
+
+	switch parsedArgs.CommentCharacter {
+	case "":
+		parsedArgs.CommentCharacter = defaultCommentCharacter
+	case defaultCommentCharacter:
+	default:
+		return fmt.Errorf("unsupported Comments '%v'", parsedArgs.CommentCharacter)
+	}
+
+	if parsedArgs.AllowQuotedRecordDelimiter {
+		return fmt.Errorf("flag AllowQuotedRecordDelimiter is unsupported at the moment")
+	}
+
+	*args = ReaderArgs(parsedArgs)
+	args.unmarshaled = true
+	return nil
+}
+
+// WriterArgs - represents elements inside <OutputSerialization><CSV/> in request XML.
+type WriterArgs struct {
+	QuoteFields          string `xml:"QuoteFields"`
+	RecordDelimiter      string `xml:"RecordDelimiter"`
+	FieldDelimiter       string `xml:"FieldDelimiter"`
+	QuoteCharacter       string `xml:"QuoteCharacter"`
+	QuoteEscapeCharacter string `xml:"QuoteEscapeCharacter"`
+	unmarshaled          bool
+}
+
+// IsEmpty - returns whether writer args is empty or not.
+func (args *WriterArgs) IsEmpty() bool {
+	return !args.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (args *WriterArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subWriterArgs WriterArgs
+	parsedArgs := subWriterArgs{}
+	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
+		return err
+	}
+
+	parsedArgs.QuoteFields = strings.ToLower(parsedArgs.QuoteFields)
+	switch parsedArgs.QuoteFields {
+	case "":
+		parsedArgs.QuoteFields = asneeded
+	case always, asneeded:
+	default:
+		return errInvalidQuoteFields(fmt.Errorf("invalid QuoteFields '%v'", parsedArgs.QuoteFields))
+	}
+
+	switch len(parsedArgs.RecordDelimiter) {
+	case 0:
+		parsedArgs.RecordDelimiter = defaultRecordDelimiter
+	case 1, 2:
+	default:
+		return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
+	}
+
+	switch len(parsedArgs.FieldDelimiter) {
+	case 0:
+		parsedArgs.FieldDelimiter = defaultFieldDelimiter
+	case 1:
+	default:
+		return fmt.Errorf("invalid FieldDelimiter '%v'", parsedArgs.FieldDelimiter)
+	}
+
+	switch parsedArgs.QuoteCharacter {
+	case "":
+		parsedArgs.QuoteCharacter = defaultQuoteCharacter
+	case defaultQuoteCharacter:
+	default:
+		return fmt.Errorf("unsupported QuoteCharacter '%v'", parsedArgs.QuoteCharacter)
+	}
+
+	switch parsedArgs.QuoteEscapeCharacter {
+	case "":
+		parsedArgs.QuoteEscapeCharacter = defaultQuoteEscapeCharacter
+	case defaultQuoteEscapeCharacter:
+	default:
+		return fmt.Errorf("unsupported QuoteEscapeCharacter '%v'", parsedArgs.QuoteEscapeCharacter)
+	}
+
+	*args = WriterArgs(parsedArgs)
+	args.unmarshaled = true
+	return nil
+}

pkg/s3select/csv/errors.go

@@ -0,0 +1,71 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package csv
+
+type s3Error struct {
+	code       string
+	message    string
+	statusCode int
+	cause      error
+}
+
+func (err *s3Error) Cause() error {
+	return err.cause
+}
+
+func (err *s3Error) ErrorCode() string {
+	return err.code
+}
+
+func (err *s3Error) ErrorMessage() string {
+	return err.message
+}
+
+func (err *s3Error) HTTPStatusCode() int {
+	return err.statusCode
+}
+
+func (err *s3Error) Error() string {
+	return err.message
+}
+
+func errInvalidFileHeaderInfo(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidFileHeaderInfo",
+		message:    "The FileHeaderInfo is invalid. Only NONE, USE, and IGNORE are supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidQuoteFields(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidQuoteFields",
+		message:    "The QuoteFields is invalid. Only ALWAYS and ASNEEDED are supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errCSVParsingError(err error) *s3Error {
+	return &s3Error{
+		code:       "CSVParsingError",
+		message:    "Encountered an error parsing the CSV file. Check the file and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}

pkg/s3select/csv/reader.go

@@ -0,0 +1,166 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package csv
+
+import (
+	"bytes"
+	"encoding/csv"
+	"fmt"
+	"io"
+
+	"github.com/minio/minio/pkg/s3select/sql"
+)
+
+type recordReader struct {
+	reader          io.Reader
+	recordDelimiter []byte
+	oneByte         []byte
+	useOneByte      bool
+}
+
+func (rr *recordReader) Read(p []byte) (n int, err error) {
+	if rr.useOneByte {
+		p[0] = rr.oneByte[0]
+		rr.useOneByte = false
+		n, err = rr.reader.Read(p[1:])
+		n++
+	} else {
+		n, err = rr.reader.Read(p)
+	}
+
+	if err != nil {
+		return 0, err
+	}
+
+	if string(rr.recordDelimiter) == "\n" {
+		return n, nil
+	}
+
+	for {
+		i := bytes.Index(p, rr.recordDelimiter)
+		if i < 0 {
+			break
+		}
+
+		p[i] = '\n'
+		if len(rr.recordDelimiter) > 1 {
+			p = append(p[:i+1], p[i+len(rr.recordDelimiter):]...)
+		}
+	}
+
+	n = len(p)
+	if len(rr.recordDelimiter) == 1 || p[n-1] != rr.recordDelimiter[0] {
+		return n, nil
+	}
+
+	if _, err = rr.reader.Read(rr.oneByte); err != nil {
+		return 0, err
+	}
+
+	if rr.oneByte[0] == rr.recordDelimiter[1] {
+		p[n-1] = '\n'
+		return n, nil
+	}
+
+	rr.useOneByte = true
+	return n, nil
+}
+
+// Reader - CSV record reader for S3Select.
+type Reader struct {
+	args        *ReaderArgs
+	readCloser  io.ReadCloser
+	csvReader   *csv.Reader
+	columnNames []string
+}
+
+// Read - reads single record.
+func (r *Reader) Read() (sql.Record, error) {
+	csvRecord, err := r.csvReader.Read()
+	if err != nil {
+		if err != io.EOF {
+			return nil, errCSVParsingError(err)
+		}
+
+		return nil, err
+	}
+
+	columnNames := r.columnNames
+	if columnNames == nil {
+		columnNames = make([]string, len(csvRecord))
+		for i := range csvRecord {
+			columnNames[i] = fmt.Sprintf("_%v", i+1)
+		}
+	}
+
+	nameIndexMap := make(map[string]int64)
+	for i := range columnNames {
+		nameIndexMap[columnNames[i]] = int64(i)
+	}
+
+	return &Record{
+		columnNames:  columnNames,
+		csvRecord:    csvRecord,
+		nameIndexMap: nameIndexMap,
+	}, nil
+}
+
+// Close - closes underlaying reader.
+func (r *Reader) Close() error {
+	return r.readCloser.Close()
+}
+
+// NewReader - creates new CSV reader using readCloser.
+func NewReader(readCloser io.ReadCloser, args *ReaderArgs) (*Reader, error) {
+	if args == nil || args.IsEmpty() {
+		panic(fmt.Errorf("empty args passed %v", args))
+	}
+
+	csvReader := csv.NewReader(&recordReader{
+		reader:          readCloser,
+		recordDelimiter: []byte(args.RecordDelimiter),
+		oneByte:         []byte{0},
+	})
+	csvReader.Comma = []rune(args.FieldDelimiter)[0]
+	csvReader.Comment = []rune(args.CommentCharacter)[0]
+	csvReader.FieldsPerRecord = -1
+
+	r := &Reader{
+		args:       args,
+		readCloser: readCloser,
+		csvReader:  csvReader,
+	}
+
+	if args.FileHeaderInfo == none {
+		return r, nil
+	}
+
+	record, err := csvReader.Read()
+	if err != nil {
+		if err != io.EOF {
+			return nil, errCSVParsingError(err)
+		}
+
+		return nil, err
+	}
+
+	if args.FileHeaderInfo == use {
+		r.columnNames = record
+	}
+
+	return r, nil
+}

pkg/s3select/csv/record.go

@@ -0,0 +1,95 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package csv
+
+import (
+	"bytes"
+	"encoding/csv"
+	"fmt"
+
+	"github.com/minio/minio/pkg/s3select/sql"
+	"github.com/tidwall/sjson"
+)
+
+// Record - is CSV record.
+type Record struct {
+	columnNames  []string
+	csvRecord    []string
+	nameIndexMap map[string]int64
+}
+
+// Get - gets the value for a column name.
+func (r *Record) Get(name string) (*sql.Value, error) {
+	index, found := r.nameIndexMap[name]
+	if !found {
+		return nil, fmt.Errorf("column %v not found", name)
+	}
+
+	if index >= int64(len(r.csvRecord)) {
+		// No value found for column 'name', hence return empty string for compatibility.
+		return sql.NewString(""), nil
+	}
+
+	return sql.NewString(r.csvRecord[index]), nil
+}
+
+// Set - sets the value for a column name.
+func (r *Record) Set(name string, value *sql.Value) error {
+	r.columnNames = append(r.columnNames, name)
+	r.csvRecord = append(r.csvRecord, value.CSVString())
+	return nil
+}
+
+// MarshalCSV - encodes to CSV data.
+func (r *Record) MarshalCSV(fieldDelimiter rune) ([]byte, error) {
+	buf := new(bytes.Buffer)
+	w := csv.NewWriter(buf)
+	w.Comma = fieldDelimiter
+	if err := w.Write(r.csvRecord); err != nil {
+		return nil, err
+	}
+	w.Flush()
+	if err := w.Error(); err != nil {
+		return nil, err
+	}
+
+	data := buf.Bytes()
+	return data[:len(data)-1], nil
+}
+
+// MarshalJSON - encodes to JSON data.
+func (r *Record) MarshalJSON() ([]byte, error) {
+	data := "{}"
+
+	var err error
+	for i := len(r.columnNames) - 1; i >= 0; i-- {
+		if i >= len(r.csvRecord) {
+			continue
+		}
+
+		if data, err = sjson.Set(data, r.columnNames[i], r.csvRecord[i]); err != nil {
+			return nil, err
+		}
+	}
+
+	return []byte(data), nil
+}
+
+// NewRecord - creates new CSV record.
+func NewRecord() *Record {
+	return &Record{}
+}

pkg/s3select/datatypes.go

@@ -1,110 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package s3select
-
-import (
-	"encoding/xml"
-)
-
-// CSVFileHeaderInfo -Can be either USE IGNORE OR NONE, defines what to do with
-// the first row
-type CSVFileHeaderInfo string
-
-// Constants for file header info.
-const (
-	CSVFileHeaderInfoNone   CSVFileHeaderInfo = "NONE"
-	CSVFileHeaderInfoIgnore                   = "IGNORE"
-	CSVFileHeaderInfoUse                      = "USE"
-)
-
-// The maximum character per record is set to be 1 MB.
-const (
-	MaxCharsPerRecord = 1000000
-)
-
-// SelectCompressionType - ONLY GZIP is supported
-type SelectCompressionType string
-
-// JSONType determines json input serialization type.
-type JSONType string
-
-// Constants for compression types under select API.
-const (
-	SelectCompressionNONE SelectCompressionType = "NONE"
-	SelectCompressionGZIP                       = "GZIP"
-	SelectCompressionBZIP                       = "BZIP2"
-)
-
-// CSVQuoteFields - Can be either Always or AsNeeded
-type CSVQuoteFields string
-
-// Constants for csv quote styles.
-const (
-	CSVQuoteFieldsAlways   CSVQuoteFields = "Always"
-	CSVQuoteFieldsAsNeeded                = "AsNeeded"
-)
-
-// QueryExpressionType - Currently can only be SQL
-type QueryExpressionType string
-
-// Constants for expression type.
-const (
-	QueryExpressionTypeSQL QueryExpressionType = "SQL"
-)
-
-// Constants for JSONTypes.
-const (
-	JSONTypeDocument JSONType = "DOCUMENT"
-	JSONLinesType             = "LINES"
-)
-
-// ObjectSelectRequest - represents the input select body
-type ObjectSelectRequest struct {
-	XMLName            xml.Name `xml:"SelectObjectContentRequest" json:"-"`
-	Expression         string
-	ExpressionType     QueryExpressionType
-	InputSerialization struct {
-		CompressionType SelectCompressionType
-		Parquet         *struct{}
-		CSV             *struct {
-			FileHeaderInfo       CSVFileHeaderInfo
-			RecordDelimiter      string
-			FieldDelimiter       string
-			QuoteCharacter       string
-			QuoteEscapeCharacter string
-			Comments             string
-		}
-		JSON *struct {
-			Type JSONType
-		}
-	}
-	OutputSerialization struct {
-		CSV *struct {
-			QuoteFields          CSVQuoteFields
-			RecordDelimiter      string
-			FieldDelimiter       string
-			QuoteCharacter       string
-			QuoteEscapeCharacter string
-		}
-		JSON *struct {
-			RecordDelimiter string
-		}
-	}
-	RequestProgress struct {
-		Enabled bool
-	}
-}

pkg/s3select/errors.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,456 +16,111 @@
 
 package s3select
 
-import (
-	"errors"
-
-	"github.com/minio/minio/pkg/s3select/format"
-)
-
-//S3 errors below
-
-// ErrBusy is an error if the service is too busy.
-var ErrBusy = errors.New("The service is unavailable. Please retry")
-
-// ErrUnauthorizedAccess is an error if you lack the appropriate credentials to
-// access the object.
-var ErrUnauthorizedAccess = errors.New("You are not authorized to perform this operation")
-
-// ErrExpressionTooLong is an error if your SQL expression too long for
-// processing.
-var ErrExpressionTooLong = errors.New("The SQL expression is too long: The maximum byte-length for the SQL expression is 256 KB")
-
-// ErrIllegalSQLFunctionArgument is an error if you provide an illegal argument
-// in the SQL function.
-var ErrIllegalSQLFunctionArgument = errors.New("Illegal argument was used in the SQL function")
-
-// ErrInvalidKeyPath is an error if you provide a key in the SQL expression that
-// is invalid.
-var ErrInvalidKeyPath = errors.New("Key path in the SQL expression is invalid")
-
-// ErrColumnTooLong is an error if your query results in a column that is
-// greater than the max amount of characters per column of 1mb
-var ErrColumnTooLong = errors.New("The length of a column in the result is greater than maxCharsPerColumn of 1 MB")
-
-// ErrOverMaxColumn is an error if the number of columns from the resulting
-// query is greater than 1Mb.
-var ErrOverMaxColumn = errors.New("The number of columns in the result is greater than maxColumnNumber of 1 MB")
-
-// ErrOverMaxRecordSize is an error if the length of a record in the result is
-// greater than 1 Mb.
-var ErrOverMaxRecordSize = errors.New("The length of a record in the result is greater than maxCharsPerRecord of 1 MB")
-
-// ErrMissingHeaders is an error if some of the headers that are requested in
-// the Select Query are not present in the file.
-var ErrMissingHeaders = errors.New("Some headers in the query are missing from the file. Check the file and try again")
-
-// ErrInvalidCompressionFormat is an error if an unsupported compression type is
-// utilized with the select object query.
-var ErrInvalidCompressionFormat = errors.New("The file is not in a supported compression format. Only GZIP is supported at this time")
-
-// ErrInvalidFileHeaderInfo is an error if the argument provided to the
-// FileHeader Argument is incorrect.
-var ErrInvalidFileHeaderInfo = errors.New("The FileHeaderInfo is invalid. Only NONE, USE, and IGNORE are supported")
-
-// ErrInvalidJSONType is an error if the json format provided as an argument is
-// invalid.
-var ErrInvalidJSONType = errors.New("The JsonType is invalid. Only DOCUMENT and LINES are supported at this time")
-
-// ErrInvalidQuoteFields is an error if the arguments provided to the
-// QuoteFields options are not valid.
-var ErrInvalidQuoteFields = errors.New("The QuoteFields is invalid. Only ALWAYS and ASNEEDED are supported")
-
-// ErrInvalidRequestParameter is an error if the value of a parameter in the
-// request element is not valid.
-var ErrInvalidRequestParameter = errors.New("The value of a parameter in Request element is invalid. Check the service API documentation and try again")
-
-// ErrExternalEvalException is an error that arises if the query can not be
-// evaluated.
-var ErrExternalEvalException = errors.New("The query cannot be evaluated. Check the file and try again")
-
-// ErrInvalidDataType is an error that occurs if the SQL expression contains an
-// invalid data type.
-var ErrInvalidDataType = errors.New("The SQL expression contains an invalid data type")
-
-// ErrUnrecognizedFormatException is an error that arises if there is an invalid
-// record type.
-var ErrUnrecognizedFormatException = errors.New("Encountered an invalid record type")
-
-// ErrInvalidTextEncoding is an error if the text encoding is not valid.
-var ErrInvalidTextEncoding = errors.New("Invalid encoding type. Only UTF-8 encoding is supported at this time")
-
-// ErrInvalidTableAlias is an error that arises if the table alias provided in
-// the SQL expression is invalid.
-var ErrInvalidTableAlias = errors.New("The SQL expression contains an invalid table alias")
-
-// ErrMultipleDataSourcesUnsupported is an error that arises if multiple data
-// sources are provided.
-var ErrMultipleDataSourcesUnsupported = errors.New("Multiple data sources are not supported")
-
-// ErrMissingRequiredParameter is an error that arises if a required argument
-// is omitted from the Request.
-var ErrMissingRequiredParameter = errors.New("The Request entity is missing a required parameter. Check the service documentation and try again")
-
-// ErrObjectSerializationConflict is an error that arises if an unsupported
-// output seralization is provided.
-var ErrObjectSerializationConflict = errors.New("The Request entity can only contain one of CSV or JSON. Check the service documentation and try again")
-
-// ErrUnsupportedSQLOperation is an error that arises if an unsupported SQL
-// operation is used.
-var ErrUnsupportedSQLOperation = errors.New("Encountered an unsupported SQL operation")
-
-// ErrUnsupportedSQLStructure is an error that occurs if an unsupported SQL
-// structure is used.
-var ErrUnsupportedSQLStructure = errors.New("Encountered an unsupported SQL structure. Check the SQL Reference")
-
-// ErrUnsupportedStorageClass is an error that occurs if an invalid storace
-// class is present.
-var ErrUnsupportedStorageClass = errors.New("Encountered an invalid storage class. Only STANDARD, STANDARD_IA, and ONEZONE_IA storage classes are supported at this time")
-
-// ErrUnsupportedSyntax is an error that occurs if invalid syntax is present in
-// the query.
-var ErrUnsupportedSyntax = errors.New("Encountered invalid syntax")
-
-// ErrUnsupportedRangeHeader is an error that occurs if a range header is
-// provided.
-var ErrUnsupportedRangeHeader = errors.New("Range header is not supported for this operation")
-
-// ErrLexerInvalidChar is an error that occurs if the SQL expression contains an
-// invalid character.
-var ErrLexerInvalidChar = errors.New("The SQL expression contains an invalid character")
-
-// ErrLexerInvalidOperator is an error that occurs if an invalid operator is
-// used.
-var ErrLexerInvalidOperator = errors.New("The SQL expression contains an invalid operator")
-
-// ErrLexerInvalidLiteral is an error that occurs if an invalid literal is used.
-var ErrLexerInvalidLiteral = errors.New("The SQL expression contains an invalid literal")
-
-// ErrLexerInvalidIONLiteral is an error that occurs if an invalid operator is
-// used
-var ErrLexerInvalidIONLiteral = errors.New("The SQL expression contains an invalid operator")
-
-// ErrParseExpectedDatePart is an error that occurs if the date part is not
-// found in the SQL expression.
-var ErrParseExpectedDatePart = errors.New("Did not find the expected date part in the SQL expression")
-
-// ErrParseExpectedKeyword is an error that occurs if the expected keyword was
-// not found in the expression.
-var ErrParseExpectedKeyword = errors.New("Did not find the expected keyword in the SQL expression")
-
-// ErrParseExpectedTokenType is an error that occurs if the expected token is
-// not found in the SQL expression.
-var ErrParseExpectedTokenType = errors.New("Did not find the expected token in the SQL expression")
-
-// ErrParseExpected2TokenTypes is an error that occurs if 2 token types are not
-// found.
-var ErrParseExpected2TokenTypes = errors.New("Did not find the expected token in the SQL expression")
-
-// ErrParseExpectedNumber is an error that occurs if a number is expected but
-// not found in the expression.
-var ErrParseExpectedNumber = errors.New("Did not find the expected number in the SQL expression")
-
-// ErrParseExpectedRightParenBuiltinFunctionCall is an error that occurs if a
-// right parenthesis is missing.
-var ErrParseExpectedRightParenBuiltinFunctionCall = errors.New("Did not find the expected right parenthesis character in the SQL expression")
-
-// ErrParseExpectedTypeName is an error that occurs if a type name is expected
-// but not found.
-var ErrParseExpectedTypeName = errors.New("Did not find the expected type name in the SQL expression")
-
-// ErrParseExpectedWhenClause is an error that occurs if a When clause is
-// expected but not found.
-var ErrParseExpectedWhenClause = errors.New("Did not find the expected WHEN clause in the SQL expression. CASE is not supported")
-
-// ErrParseUnsupportedToken is an error that occurs if the SQL expression
-// contains an unsupported token.
-var ErrParseUnsupportedToken = errors.New("The SQL expression contains an unsupported token")
-
-// ErrParseUnsupportedLiteralsGroupBy is an error that occurs if the SQL
-// expression has an unsupported use of Group By.
-var ErrParseUnsupportedLiteralsGroupBy = errors.New("The SQL expression contains an unsupported use of GROUP BY")
-
-// ErrParseExpectedMember is an error that occurs if there is an unsupported use
-// of member in the SQL expression.
-var ErrParseExpectedMember = errors.New("The SQL expression contains an unsupported use of MEMBER")
-
-// ErrParseUnsupportedSelect is an error that occurs if there is an unsupported
-// use of Select.
-var ErrParseUnsupportedSelect = errors.New("The SQL expression contains an unsupported use of SELECT")
-
-// ErrParseUnsupportedCase is an error that occurs if there is an unsupported
-// use of case.
-var ErrParseUnsupportedCase = errors.New("The SQL expression contains an unsupported use of CASE")
-
-// ErrParseUnsupportedCaseClause is an error that occurs if there is an
-// unsupported use of case.
-var ErrParseUnsupportedCaseClause = errors.New("The SQL expression contains an unsupported use of CASE")
-
-// ErrParseUnsupportedAlias is an error that occurs if there is an unsupported
-// use of Alias.
-var ErrParseUnsupportedAlias = errors.New("The SQL expression contains an unsupported use of ALIAS")
-
-// ErrParseUnsupportedSyntax is an error that occurs if there is an
-// UnsupportedSyntax in the SQL expression.
-var ErrParseUnsupportedSyntax = errors.New("The SQL expression contains unsupported syntax")
-
-// ErrParseUnknownOperator is an error that occurs if there is an invalid
-// operator present in the SQL expression.
-var ErrParseUnknownOperator = errors.New("The SQL expression contains an invalid operator")
-
-// ErrParseMissingIdentAfterAt is an error that occurs if the wrong symbol
-// follows the "@" symbol in the SQL expression.
-var ErrParseMissingIdentAfterAt = errors.New("Did not find the expected identifier after the @ symbol in the SQL expression")
-
-// ErrParseUnexpectedOperator is an error that occurs if the SQL expression
-// contains an unexpected operator.
-var ErrParseUnexpectedOperator = errors.New("The SQL expression contains an unexpected operator")
-
-// ErrParseUnexpectedTerm is an error that occurs if the SQL expression contains
-// an unexpected term.
-var ErrParseUnexpectedTerm = errors.New("The SQL expression contains an unexpected term")
-
-// ErrParseUnexpectedToken is an error that occurs if the SQL expression
-// contains an unexpected token.
-var ErrParseUnexpectedToken = errors.New("The SQL expression contains an unexpected token")
-
-// ErrParseUnexpectedKeyword is an error that occurs if the SQL expression
-// contains an unexpected keyword.
-var ErrParseUnexpectedKeyword = errors.New("The SQL expression contains an unexpected keyword")
-
-// ErrParseExpectedExpression is an error that occurs if the SQL expression is
-// not found.
-var ErrParseExpectedExpression = errors.New("Did not find the expected SQL expression")
-
-// ErrParseExpectedLeftParenAfterCast is an error that occurs if the left
-// parenthesis is missing after a cast in the SQL expression.
-var ErrParseExpectedLeftParenAfterCast = errors.New("Did not find the expected left parenthesis after CAST in the SQL expression")
-
-// ErrParseExpectedLeftParenValueConstructor is an error that occurs if the left
-// parenthesis is not found in the SQL expression.
-var ErrParseExpectedLeftParenValueConstructor = errors.New("Did not find expected the left parenthesis in the SQL expression")
-
-// ErrParseExpectedLeftParenBuiltinFunctionCall is an error that occurs if the
-// left parenthesis is not found in the SQL expression function call.
-var ErrParseExpectedLeftParenBuiltinFunctionCall = errors.New("Did not find the expected left parenthesis in the SQL expression")
-
-// ErrParseExpectedArgumentDelimiter is an error that occurs if the argument
-// delimiter for the SQL expression is not provided.
-var ErrParseExpectedArgumentDelimiter = errors.New("Did not find the expected argument delimiter in the SQL expression")
-
-// ErrParseCastArity is an error that occurs because the CAST has incorrect
-// arity.
-var ErrParseCastArity = errors.New("The SQL expression CAST has incorrect arity")
-
-// ErrParseInvalidTypeParam is an error that occurs because there is an invalid
-// parameter value.
-var ErrParseInvalidTypeParam = errors.New("The SQL expression contains an invalid parameter value")
-
-// ErrParseEmptySelect is an error that occurs because the SQL expression
-// contains an empty Select
-var ErrParseEmptySelect = errors.New("The SQL expression contains an empty SELECT")
-
-// ErrParseSelectMissingFrom is an error that occurs because there is a missing
-// From after the Select List.
-var ErrParseSelectMissingFrom = errors.New("The SQL expression contains a missing FROM after SELECT list")
-
-// ErrParseExpectedIdentForGroupName is an error that occurs because Group is
-// not supported in the SQL expression.
-var ErrParseExpectedIdentForGroupName = errors.New("GROUP is not supported in the SQL expression")
-
-// ErrParseExpectedIdentForAlias is an error that occurs if expected identifier
-// for alias is not in the SQL expression.
-var ErrParseExpectedIdentForAlias = errors.New("Did not find the expected identifier for the alias in the SQL expression")
-
-// ErrParseUnsupportedCallWithStar is an error that occurs if COUNT is used with
-// an argument other than "*".
-var ErrParseUnsupportedCallWithStar = errors.New("Only COUNT with (*) as a parameter is supported in the SQL expression")
-
-// ErrParseNonUnaryAgregateFunctionCall is an error that occurs if more than one
-// argument is provided as an argument for aggregation functions.
-var ErrParseNonUnaryAgregateFunctionCall = errors.New("Only one argument is supported for aggregate functions in the SQL expression")
-
-// ErrParseMalformedJoin is an error that occurs if a "join" operation is
-// attempted in the SQL expression as this is not supported.
-var ErrParseMalformedJoin = errors.New("JOIN is not supported in the SQL expression")
-
-// ErrParseExpectedIdentForAt is an error that occurs if after "AT" an Alias
-// identifier is not provided.
-var ErrParseExpectedIdentForAt = errors.New("Did not find the expected identifier for AT name in the SQL expression")
-
-// ErrParseAsteriskIsNotAloneInSelectList is an error that occurs if in addition
-// to an asterix, more column names are provided as arguments in the SQL
-// expression.
-var ErrParseAsteriskIsNotAloneInSelectList = errors.New("Other expressions are not allowed in the SELECT list when '*' is used without dot notation in the SQL expression")
-
-// ErrParseCannotMixSqbAndWildcardInSelectList is an error that occurs if list
-// indexing and an asterix are mixed in the SQL expression.
-var ErrParseCannotMixSqbAndWildcardInSelectList = errors.New("Cannot mix [] and * in the same expression in a SELECT list in SQL expression")
-
-// ErrParseInvalidContextForWildcardInSelectList is an error that occurs if the
-// asterix is used improperly within the SQL expression.
-var ErrParseInvalidContextForWildcardInSelectList = errors.New("Invalid use of * in SELECT list in the SQL expression")
-
-// ErrEvaluatorBindingDoesNotExist is an error that occurs if a column name or
-// path provided in the expression does not exist.
-var ErrEvaluatorBindingDoesNotExist = errors.New("A column name or a path provided does not exist in the SQL expression")
-
-// ErrIncorrectSQLFunctionArgumentType is an error that occurs if the wrong
-// argument is provided to a SQL function.
-var ErrIncorrectSQLFunctionArgumentType = errors.New("Incorrect type of arguments in function call in the SQL expression")
-
-// ErrAmbiguousFieldName is an error that occurs if the column name which is not
-// case sensitive, is not descriptive enough to retrieve a singular column.
-var ErrAmbiguousFieldName = errors.New("Field name matches to multiple fields in the file. Check the SQL expression and the file, and try again")
-
-// ErrEvaluatorInvalidArguments is an error that occurs if there are not the
-// correct number of arguments in a functional call to a SQL expression.
-var ErrEvaluatorInvalidArguments = errors.New("Incorrect number of arguments in the function call in the SQL expression")
-
-// ErrValueParseFailure is an error that occurs if the Time Stamp is not parsed
-// correctly in the SQL expression.
-var ErrValueParseFailure = errors.New("Time stamp parse failure in the SQL expression")
-
-// ErrIntegerOverflow is an error that occurs if there is an IntegerOverflow or
-// IntegerUnderFlow in the SQL expression.
-var ErrIntegerOverflow = errors.New("Int overflow or underflow in the SQL expression")
-
-// ErrLikeInvalidInputs is an error that occurs if invalid inputs are provided
-// to the argument LIKE Clause.
-var ErrLikeInvalidInputs = errors.New("Invalid argument given to the LIKE clause in the SQL expression")
-
-// ErrCastFailed occurs if the attempt to convert data types in the cast is not
-// done correctly.
-var ErrCastFailed = errors.New("Attempt to convert from one data type to another using CAST failed in the SQL expression")
-
-// ErrInvalidCast is an error that occurs if the attempt to convert data types
-// failed and was done in an improper fashion.
-var ErrInvalidCast = errors.New("Attempt to convert from one data type to another using CAST failed in the SQL expression")
-
-// ErrEvaluatorInvalidTimestampFormatPattern is an error that occurs if the Time
-// Stamp Format needs more additional fields to be filled.
-var ErrEvaluatorInvalidTimestampFormatPattern = errors.New("Time stamp format pattern requires additional fields in the SQL expression")
-
-// ErrEvaluatorInvalidTimestampFormatPatternSymbolForParsing is an error that
-// occurs if the format of the time stamp can not be parsed.
-var ErrEvaluatorInvalidTimestampFormatPatternSymbolForParsing = errors.New("Time stamp format pattern contains a valid format symbol that cannot be applied to time stamp parsing in the SQL expression")
-
-// ErrEvaluatorTimestampFormatPatternDuplicateFields is an error that occurs if
-// the time stamp format pattern contains multiple format specifications which
-// can not be clearly resolved.
-var ErrEvaluatorTimestampFormatPatternDuplicateFields = errors.New("Time stamp format pattern contains multiple format specifiers representing the time stamp field in the SQL expression")
-
-//ErrEvaluatorTimestampFormatPatternHourClockAmPmMismatch is an error that
-//occurs if the time stamp format pattern contains a 12 hour day of format but
-//does not have an AM/PM field.
-var ErrEvaluatorTimestampFormatPatternHourClockAmPmMismatch = errors.New("Time stamp format pattern contains a 12-hour hour of day format symbol but doesn't also contain an AM/PM field, or it contains a 24-hour hour of day format specifier and contains an AM/PM field in the SQL expression")
-
-// ErrEvaluatorUnterminatedTimestampFormatPatternToken is an error that occurs
-// if there is an unterminated token in the SQL expression for time stamp
-// format.
-var ErrEvaluatorUnterminatedTimestampFormatPatternToken = errors.New("Time stamp format pattern contains unterminated token in the SQL expression")
-
-// ErrEvaluatorInvalidTimestampFormatPatternToken is an error that occurs if
-// there is an invalid token in the time stamp format within the SQL expression.
-var ErrEvaluatorInvalidTimestampFormatPatternToken = errors.New("Time stamp format pattern contains an invalid token in the SQL expression")
-
-// ErrEvaluatorInvalidTimestampFormatPatternSymbol  is an error that occurs if
-// the time stamp format pattern has an invalid symbol within the SQL
-// expression.
-var ErrEvaluatorInvalidTimestampFormatPatternSymbol = errors.New("Time stamp format pattern contains an invalid symbol in the SQL expression")
-
-// S3 select API errors - TODO fix the errors.
-var errorCodeResponse = map[error]string{
-	ErrBusy:                                                   "Busy",
-	ErrUnauthorizedAccess:                                     "UnauthorizedAccess",
-	ErrExpressionTooLong:                                      "ExpressionTooLong",
-	ErrIllegalSQLFunctionArgument:                             "IllegalSqlFunctionArgument",
-	format.ErrInvalidColumnIndex:                              "InvalidColumnIndex",
-	ErrInvalidKeyPath:                                         "InvalidKeyPath",
-	ErrColumnTooLong:                                          "ColumnTooLong",
-	ErrOverMaxColumn:                                          "OverMaxColumn",
-	ErrOverMaxRecordSize:                                      "OverMaxRecordSize",
-	ErrMissingHeaders:                                         "MissingHeaders",
-	ErrInvalidCompressionFormat:                               "InvalidCompressionFormat",
-	format.ErrTruncatedInput:                                  "TruncatedInput",
-	ErrInvalidFileHeaderInfo:                                  "InvalidFileHeaderInfo",
-	ErrInvalidJSONType:                                        "InvalidJsonType",
-	ErrInvalidQuoteFields:                                     "InvalidQuoteFields",
-	ErrInvalidRequestParameter:                                "InvalidRequestParameter",
-	format.ErrCSVParsingError:                                 "CSVParsingError",
-	format.ErrJSONParsingError:                                "JSONParsingError",
-	ErrExternalEvalException:                                  "ExternalEvalException",
-	ErrInvalidDataType:                                        "InvalidDataType",
-	ErrUnrecognizedFormatException:                            "UnrecognizedFormatException",
-	ErrInvalidTextEncoding:                                    "InvalidTextEncoding",
-	ErrInvalidTableAlias:                                      "InvalidTableAlias",
-	ErrMultipleDataSourcesUnsupported:                         "MultipleDataSourcesUnsupported",
-	ErrMissingRequiredParameter:                               "MissingRequiredParameter",
-	ErrObjectSerializationConflict:                            "ObjectSerializationConflict",
-	ErrUnsupportedSQLOperation:                                "UnsupportedSqlOperation",
-	ErrUnsupportedSQLStructure:                                "UnsupportedSqlStructure",
-	ErrUnsupportedStorageClass:                                "UnsupportedStorageClass",
-	ErrUnsupportedSyntax:                                      "UnsupportedSyntax",
-	ErrUnsupportedRangeHeader:                                 "UnsupportedRangeHeader",
-	ErrLexerInvalidChar:                                       "LexerInvalidChar",
-	ErrLexerInvalidOperator:                                   "LexerInvalidOperator",
-	ErrLexerInvalidLiteral:                                    "LexerInvalidLiteral",
-	ErrLexerInvalidIONLiteral:                                 "LexerInvalidIONLiteral",
-	ErrParseExpectedDatePart:                                  "ParseExpectedDatePart",
-	ErrParseExpectedKeyword:                                   "ParseExpectedKeyword",
-	ErrParseExpectedTokenType:                                 "ParseExpectedTokenType",
-	ErrParseExpected2TokenTypes:                               "ParseExpected2TokenTypes",
-	ErrParseExpectedNumber:                                    "ParseExpectedNumber",
-	ErrParseExpectedRightParenBuiltinFunctionCall:             "ParseExpectedRightParenBuiltinFunctionCall",
-	ErrParseExpectedTypeName:                                  "ParseExpectedTypeName",
-	ErrParseExpectedWhenClause:                                "ParseExpectedWhenClause",
-	ErrParseUnsupportedToken:                                  "ParseUnsupportedToken",
-	ErrParseUnsupportedLiteralsGroupBy:                        "ParseUnsupportedLiteralsGroupBy",
-	ErrParseExpectedMember:                                    "ParseExpectedMember",
-	ErrParseUnsupportedSelect:                                 "ParseUnsupportedSelect",
-	ErrParseUnsupportedCase:                                   "ParseUnsupportedCase:",
-	ErrParseUnsupportedCaseClause:                             "ParseUnsupportedCaseClause",
-	ErrParseUnsupportedAlias:                                  "ParseUnsupportedAlias",
-	ErrParseUnsupportedSyntax:                                 "ParseUnsupportedSyntax",
-	ErrParseUnknownOperator:                                   "ParseUnknownOperator",
-	format.ErrParseInvalidPathComponent:                       "ParseInvalidPathComponent",
-	ErrParseMissingIdentAfterAt:                               "ParseMissingIdentAfterAt",
-	ErrParseUnexpectedOperator:                                "ParseUnexpectedOperator",
-	ErrParseUnexpectedTerm:                                    "ParseUnexpectedTerm",
-	ErrParseUnexpectedToken:                                   "ParseUnexpectedToken",
-	ErrParseUnexpectedKeyword:                                 "ParseUnexpectedKeyword",
-	ErrParseExpectedExpression:                                "ParseExpectedExpression",
-	ErrParseExpectedLeftParenAfterCast:                        "ParseExpectedLeftParenAfterCast",
-	ErrParseExpectedLeftParenValueConstructor:                 "ParseExpectedLeftParenValueConstructor",
-	ErrParseExpectedLeftParenBuiltinFunctionCall:              "ParseExpectedLeftParenBuiltinFunctionCall",
-	ErrParseExpectedArgumentDelimiter:                         "ParseExpectedArgumentDelimiter",
-	ErrParseCastArity:                                         "ParseCastArity",
-	ErrParseInvalidTypeParam:                                  "ParseInvalidTypeParam",
-	ErrParseEmptySelect:                                       "ParseEmptySelect",
-	ErrParseSelectMissingFrom:                                 "ParseSelectMissingFrom",
-	ErrParseExpectedIdentForGroupName:                         "ParseExpectedIdentForGroupName",
-	ErrParseExpectedIdentForAlias:                             "ParseExpectedIdentForAlias",
-	ErrParseUnsupportedCallWithStar:                           "ParseUnsupportedCallWithStar",
-	ErrParseNonUnaryAgregateFunctionCall:                      "ParseNonUnaryAgregateFunctionCall",
-	ErrParseMalformedJoin:                                     "ParseMalformedJoin",
-	ErrParseExpectedIdentForAt:                                "ParseExpectedIdentForAt",
-	ErrParseAsteriskIsNotAloneInSelectList:                    "ParseAsteriskIsNotAloneInSelectList",
-	ErrParseCannotMixSqbAndWildcardInSelectList:               "ParseCannotMixSqbAndWildcardInSelectList",
-	ErrParseInvalidContextForWildcardInSelectList:             "ParseInvalidContextForWildcardInSelectList",
-	ErrEvaluatorBindingDoesNotExist:                           "EvaluatorBindingDoesNotExist",
-	ErrIncorrectSQLFunctionArgumentType:                       "IncorrectSqlFunctionArgumentType",
-	ErrAmbiguousFieldName:                                     "AmbiguousFieldName",
-	ErrEvaluatorInvalidArguments:                              "EvaluatorInvalidArguments",
-	ErrValueParseFailure:                                      "ValueParseFailure",
-	ErrIntegerOverflow:                                        "IntegerOverflow",
-	ErrLikeInvalidInputs:                                      "LikeInvalidInputs",
-	ErrCastFailed:                                             "CastFailed",
-	ErrInvalidCast:                                            "Attempt to convert from one data type to another using CAST failed in the SQL expression.",
-	ErrEvaluatorInvalidTimestampFormatPattern:                 "EvaluatorInvalidTimestampFormatPattern",
-	ErrEvaluatorInvalidTimestampFormatPatternSymbolForParsing: "EvaluatorInvalidTimestampFormatPatternSymbolForParsing",
-	ErrEvaluatorTimestampFormatPatternDuplicateFields:         "EvaluatorTimestampFormatPatternDuplicateFields",
-	ErrEvaluatorTimestampFormatPatternHourClockAmPmMismatch:   "EvaluatorTimestampFormatPatternHourClockAmPmMismatch",
-	ErrEvaluatorUnterminatedTimestampFormatPatternToken:       "EvaluatorUnterminatedTimestampFormatPatternToken",
-	ErrEvaluatorInvalidTimestampFormatPatternToken:            "EvaluatorInvalidTimestampFormatPatternToken",
-	ErrEvaluatorInvalidTimestampFormatPatternSymbol:           "EvaluatorInvalidTimestampFormatPatternSymbol",
+// SelectError - represents s3 select error specified in
+// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html#RESTObjectSELECTContent-responses-special-errors.
+type SelectError interface {
+	Cause() error
+	ErrorCode() string
+	ErrorMessage() string
+	HTTPStatusCode() int
+	Error() string
+}
+
+type s3Error struct {
+	code       string
+	message    string
+	statusCode int
+	cause      error
+}
+
+func (err *s3Error) Cause() error {
+	return err.cause
+}
+
+func (err *s3Error) ErrorCode() string {
+	return err.code
+}
+
+func (err *s3Error) ErrorMessage() string {
+	return err.message
+}
+
+func (err *s3Error) HTTPStatusCode() int {
+	return err.statusCode
+}
+
+func (err *s3Error) Error() string {
+	return err.message
+}
+
+func errMalformedXML(err error) *s3Error {
+	return &s3Error{
+		code:       "MalformedXML",
+		message:    "The XML provided was not well-formed or did not validate against our published schema. Check the service documentation and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidCompressionFormat(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidCompressionFormat",
+		message:    "The file is not in a supported compression format. Only GZIP and BZIP2 are supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidDataSource(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidDataSource",
+		message:    "Invalid data source type. Only CSV, JSON, and Parquet are supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidRequestParameter(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidRequestParameter",
+		message:    "The value of a parameter in SelectRequest element is invalid. Check the service API documentation and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errObjectSerializationConflict(err error) *s3Error {
+	return &s3Error{
+		code:       "ObjectSerializationConflict",
+		message:    "InputSerialization specifies more than one format (CSV, JSON, or Parquet), or OutputSerialization specifies more than one format (CSV or JSON). InputSerialization and OutputSerialization can only specify one format each.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidExpressionType(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidExpressionType",
+		message:    "The ExpressionType is invalid. Only SQL expressions are supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errMissingRequiredParameter(err error) *s3Error {
+	return &s3Error{
+		code:       "MissingRequiredParameter",
+		message:    "The SelectRequest entity is missing a required parameter. Check the service documentation and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errTruncatedInput(err error) *s3Error {
+	return &s3Error{
+		code:       "TruncatedInput",
+		message:    "Object decompression failed. Check that the object is properly compressed using the format specified in the request.",
+		statusCode: 400,
+		cause:      err,
+	}
 }

pkg/s3select/evaluate.go

@@ -1,223 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package s3select
-
-import (
-	"strings"
-
-	"github.com/tidwall/gjson"
-	"github.com/xwb1989/sqlparser"
-
-	"github.com/minio/minio/pkg/s3select/format"
-)
-
-// stringOps is a function which handles the case in a clause
-// if there is a need to perform a string function
-func stringOps(myFunc *sqlparser.FuncExpr, record []byte, myReturnVal string) string {
-	var value string
-	funcName := myFunc.Name.CompliantName()
-	switch tempArg := myFunc.Exprs[0].(type) {
-	case *sqlparser.AliasedExpr:
-		switch col := tempArg.Expr.(type) {
-		case *sqlparser.FuncExpr:
-			// myReturnVal is actually the tail recursive value being used in the eval func.
-			return applyStrFunc(gjson.Parse(myReturnVal), funcName)
-		case *sqlparser.ColName:
-			value = applyStrFunc(gjson.GetBytes(record, col.Name.CompliantName()), funcName)
-		case *sqlparser.SQLVal:
-			value = applyStrFunc(gjson.ParseBytes(col.Val), funcName)
-		}
-	}
-	return value
-}
-
-// coalOps is a function which decomposes a COALESCE func expr into its struct.
-func coalOps(myFunc *sqlparser.FuncExpr, record []byte, myReturnVal string) string {
-	myArgs := make([]string, len(myFunc.Exprs))
-
-	for i, expr := range myFunc.Exprs {
-		switch tempArg := expr.(type) {
-		case *sqlparser.AliasedExpr:
-			switch col := tempArg.Expr.(type) {
-			case *sqlparser.FuncExpr:
-				// myReturnVal is actually the tail recursive value being used in the eval func.
-				return myReturnVal
-			case *sqlparser.ColName:
-				myArgs[i] = gjson.GetBytes(record, col.Name.CompliantName()).String()
-			case *sqlparser.SQLVal:
-				myArgs[i] = string(col.Val)
-			}
-		}
-	}
-	return processCoalNoIndex(myArgs)
-}
-
-// nullOps is a function which decomposes a NullIf func expr into its struct.
-func nullOps(myFunc *sqlparser.FuncExpr, record []byte, myReturnVal string) string {
-	myArgs := make([]string, 2)
-
-	for i, expr := range myFunc.Exprs {
-		switch tempArg := expr.(type) {
-		case *sqlparser.AliasedExpr:
-			switch col := tempArg.Expr.(type) {
-			case *sqlparser.FuncExpr:
-				return myReturnVal
-			case *sqlparser.ColName:
-				myArgs[i] = gjson.GetBytes(record, col.Name.CompliantName()).String()
-			case *sqlparser.SQLVal:
-				myArgs[i] = string(col.Val)
-			}
-		}
-	}
-	if myArgs[0] == myArgs[1] {
-		return ""
-	}
-	return myArgs[0]
-}
-
-// isValidString is a function that ensures the
-// current index is one with a StrFunc
-func isValidFunc(myList []int, index int) bool {
-	if myList == nil {
-		return false
-	}
-	for _, i := range myList {
-		if i == index {
-			return true
-		}
-	}
-	return false
-}
-
-// processCoalNoIndex is a function which evaluates a given COALESCE clause.
-func processCoalNoIndex(coalStore []string) string {
-	for _, coal := range coalStore {
-		if coal != "null" && coal != "missing" && coal != "" {
-			return coal
-		}
-	}
-	return "null"
-}
-
-// evaluateFuncExpr is a function that allows for tail recursive evaluation of
-// nested function expressions
-func evaluateFuncExpr(myVal *sqlparser.FuncExpr, myReturnVal string, record []byte) string {
-	if myVal == nil {
-		return myReturnVal
-	}
-	// retrieve all the relevant arguments of the function
-	var mySubFunc []*sqlparser.FuncExpr
-	mySubFunc = make([]*sqlparser.FuncExpr, len(myVal.Exprs))
-	for i, expr := range myVal.Exprs {
-		switch col := expr.(type) {
-		case *sqlparser.AliasedExpr:
-			switch temp := col.Expr.(type) {
-			case *sqlparser.FuncExpr:
-				mySubFunc[i] = temp
-			}
-		}
-	}
-	// Need to do tree recursion so as to explore all possible directions of the
-	// nested function recursion
-	for i := 0; i < len(mySubFunc); i++ {
-		if supportedString(myVal.Name.CompliantName()) {
-			if mySubFunc != nil {
-				return stringOps(myVal, record, evaluateFuncExpr(mySubFunc[i], myReturnVal, record))
-			}
-			return stringOps(myVal, record, myReturnVal)
-		} else if strings.ToUpper(myVal.Name.CompliantName()) == "NULLIF" {
-			if mySubFunc != nil {
-				return nullOps(myVal, record, evaluateFuncExpr(mySubFunc[i], myReturnVal, record))
-			}
-			return nullOps(myVal, record, myReturnVal)
-		} else if strings.ToUpper(myVal.Name.CompliantName()) == "COALESCE" {
-			if mySubFunc != nil {
-				return coalOps(myVal, record, evaluateFuncExpr(mySubFunc[i], myReturnVal, record))
-			}
-			return coalOps(myVal, record, myReturnVal)
-		}
-	}
-	return ""
-}
-
-// evaluateFuncErr is a function that flags errors in nested functions.
-func evaluateFuncErr(myVal *sqlparser.FuncExpr, reader format.Select) error {
-	if myVal == nil {
-		return nil
-	}
-	if !supportedFunc(myVal.Name.CompliantName()) {
-		return ErrUnsupportedSQLOperation
-	}
-	for _, expr := range myVal.Exprs {
-		switch tempArg := expr.(type) {
-		case *sqlparser.StarExpr:
-			return ErrParseUnsupportedCallWithStar
-		case *sqlparser.AliasedExpr:
-			switch col := tempArg.Expr.(type) {
-			case *sqlparser.FuncExpr:
-				if err := evaluateFuncErr(col, reader); err != nil {
-					return err
-				}
-			case *sqlparser.ColName:
-				if err := reader.ColNameErrs([]string{col.Name.CompliantName()}); err != nil {
-					return err
-				}
-			}
-		}
-	}
-	return nil
-}
-
-// evaluateIsExpr is a function for evaluating expressions of the form "column is ...."
-func evaluateIsExpr(myFunc *sqlparser.IsExpr, row []byte, alias string) (bool, error) {
-	getMyVal := func() (myVal string) {
-		switch myIs := myFunc.Expr.(type) {
-		// case for literal val
-		case *sqlparser.SQLVal:
-			myVal = string(myIs.Val)
-			// case for nested func val
-		case *sqlparser.FuncExpr:
-			myVal = evaluateFuncExpr(myIs, "", row)
-			// case for col val
-		case *sqlparser.ColName:
-			myVal = gjson.GetBytes(row, myIs.Name.CompliantName()).String()
-		}
-		return myVal
-	}
-
-	operator := strings.ToLower(myFunc.Operator)
-	switch operator {
-	case "is null":
-		return getMyVal() == "", nil
-	case "is not null":
-		return getMyVal() != "", nil
-	default:
-		return false, ErrUnsupportedSQLOperation
-	}
-}
-
-// supportedString is a function that checks whether the function is a supported
-// string one
-func supportedString(strFunc string) bool {
-	return format.StringInSlice(strings.ToUpper(strFunc), []string{"TRIM", "SUBSTRING", "CHAR_LENGTH", "CHARACTER_LENGTH", "LOWER", "UPPER"})
-}
-
-// supportedFunc is a function that checks whether the function is a supported
-// S3 one.
-func supportedFunc(strFunc string) bool {
-	return format.StringInSlice(strings.ToUpper(strFunc), []string{"TRIM", "SUBSTRING", "CHAR_LENGTH", "CHARACTER_LENGTH", "LOWER", "UPPER", "COALESCE", "NULLIF"})
-}

pkg/s3select/format/csv/csv.go

@@ -1,339 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package csv
-
-import (
-	"encoding/csv"
-	"encoding/xml"
-	"io"
-	"strconv"
-	"strings"
-
-	"github.com/tidwall/sjson"
-
-	"github.com/minio/minio/pkg/ioutil"
-	"github.com/minio/minio/pkg/s3select/format"
-)
-
-// Options options are passed to the underlying encoding/csv reader.
-type Options struct {
-	// HasHeader when true, will treat the first row as a header row.
-	HasHeader bool
-
-	// RecordDelimiter is the string that records are delimited by.
-	RecordDelimiter string
-
-	// FieldDelimiter is the string that fields are delimited by.
-	FieldDelimiter string
-
-	// Comments is the string the first character of a line of
-	// text matches the comment character.
-	Comments string
-
-	// Name of the table that is used for querying
-	Name string
-
-	// ReadFrom is where the data will be read from.
-	ReadFrom io.Reader
-
-	// If true then we need to add gzip or bzip reader.
-	// to extract the csv.
-	Compressed string
-
-	// SQL expression meant to be evaluated.
-	Expression string
-
-	// Output CSV will be delimited by.
-	OutputFieldDelimiter string
-
-	// Output CSV record will be delimited by.
-	OutputRecordDelimiter string
-
-	// Size of incoming object
-	StreamSize int64
-
-	// Whether Header is "USE" or another
-	HeaderOpt bool
-
-	// Progress enabled, enable/disable progress messages.
-	Progress bool
-
-	// Output format type, supported values are CSV and JSON
-	OutputType format.Type
-}
-
-// cinput represents a record producing input from a formatted object.
-type cinput struct {
-	options         *Options
-	reader          *csv.Reader
-	firstRow        []string
-	header          []string
-	minOutputLength int
-	stats           struct {
-		BytesScanned   int64
-		BytesReturned  int64
-		BytesProcessed int64
-	}
-}
-
-// New sets up a new Input, the first row is read when this is run.
-// If there is a problem with reading the first row, the error is returned.
-// Otherwise, the returned reader can be reliably consumed with Read().
-// until Read() return err.
-func New(opts *Options) (format.Select, error) {
-	// DelimitedReader treats custom record delimiter like `\r\n`,`\r`,`ab` etc and replaces it with `\n`.
-	normalizedReader := ioutil.NewDelimitedReader(opts.ReadFrom, []rune(opts.RecordDelimiter))
-	reader := &cinput{
-		options: opts,
-		reader:  csv.NewReader(normalizedReader),
-	}
-	reader.stats.BytesScanned = opts.StreamSize
-	reader.stats.BytesProcessed = 0
-	reader.stats.BytesReturned = 0
-	reader.firstRow = nil
-
-	reader.reader.FieldsPerRecord = -1
-	if reader.options.FieldDelimiter != "" {
-		reader.reader.Comma = rune(reader.options.FieldDelimiter[0])
-	}
-
-	if reader.options.Comments != "" {
-		reader.reader.Comment = rune(reader.options.Comments[0])
-	}
-
-	// QuoteCharacter - " (defaulted currently)
-	reader.reader.LazyQuotes = true
-
-	if err := reader.readHeader(); err != nil {
-		return nil, err
-	}
-
-	return reader, nil
-}
-
-// Replace the spaces in columnnames with underscores
-func cleanHeader(columns []string) []string {
-	for i := range columns {
-		// Even if header name is specified, some CSV's
-		// might have column header names might be empty
-		// and non-empty. In such a scenario we prepare
-		// indexed value.
-		if columns[i] == "" {
-			columns[i] = "_" + strconv.Itoa(i)
-		}
-		columns[i] = strings.Replace(columns[i], " ", "_", -1)
-	}
-	return columns
-}
-
-// readHeader reads the header into the header variable if the header is present
-// as the first row of the csv
-func (reader *cinput) readHeader() error {
-	var readErr error
-	if reader.options.HasHeader {
-		reader.firstRow, readErr = reader.reader.Read()
-		if readErr != nil {
-			return format.ErrCSVParsingError
-		}
-		reader.header = cleanHeader(reader.firstRow)
-		reader.firstRow = nil
-	} else {
-		reader.firstRow, readErr = reader.reader.Read()
-		if readErr != nil {
-			return format.ErrCSVParsingError
-		}
-		reader.header = make([]string, len(reader.firstRow))
-		for i := range reader.firstRow {
-			reader.header[i] = "_" + strconv.Itoa(i)
-		}
-	}
-	reader.minOutputLength = len(reader.header)
-	return nil
-}
-
-// Progress - return true if progress was requested.
-func (reader *cinput) Progress() bool {
-	return reader.options.Progress
-}
-
-// UpdateBytesProcessed - populates the bytes Processed
-func (reader *cinput) UpdateBytesProcessed(size int64) {
-	reader.stats.BytesProcessed += size
-
-}
-
-// Read returns byte sequence
-func (reader *cinput) Read() ([]byte, error) {
-	dec := reader.readRecord()
-	if dec != nil {
-		var data []byte
-		var err error
-		// Navigate column values in reverse order to preserve
-		// the input order for AWS S3 compatibility, because
-		// sjson adds json key/value pairs in first in last out
-		// fashion. This should be fixed in sjson ideally. Following
-		// work around is needed to circumvent this issue for now.
-		for i := len(dec) - 1; i >= 0; i-- {
-			data, err = sjson.SetBytes(data, reader.header[i], dec[i])
-			if err != nil {
-				return nil, err
-			}
-		}
-		return data, nil
-	}
-	return nil, nil
-}
-
-// OutputFieldDelimiter - returns the requested output field delimiter.
-func (reader *cinput) OutputFieldDelimiter() string {
-	return reader.options.OutputFieldDelimiter
-}
-
-// OutputRecordDelimiter - returns the requested output record delimiter.
-func (reader *cinput) OutputRecordDelimiter() string {
-	return reader.options.OutputRecordDelimiter
-}
-
-// HasHeader - returns true or false depending upon the header.
-func (reader *cinput) HasHeader() bool {
-	return reader.options.HasHeader
-}
-
-// Expression - return the Select Expression for
-func (reader *cinput) Expression() string {
-	return reader.options.Expression
-}
-
-// UpdateBytesReturned - updates the Bytes returned for
-func (reader *cinput) UpdateBytesReturned(size int64) {
-	reader.stats.BytesReturned += size
-}
-
-// Header returns the header of the reader. Either the first row if a header
-// set in the options, or c#, where # is the column number, starting with 0.
-func (reader *cinput) Header() []string {
-	return reader.header
-}
-
-// readRecord reads a single record from the stream and it always returns successfully.
-// If the record is empty, an empty []string is returned.
-// Record expand to match the current row size, adding blank fields as needed.
-// Records never return less then the number of fields in the first row.
-// Returns nil on EOF
-// In the event of a parse error due to an invalid record, it is logged, and
-// an empty []string is returned with the number of fields in the first row,
-// as if the record were empty.
-//
-// In general, this is a very tolerant of problems  reader.
-func (reader *cinput) readRecord() []string {
-	var row []string
-	var fileErr error
-
-	if reader.firstRow != nil {
-		row = reader.firstRow
-		reader.firstRow = nil
-		return row
-	}
-
-	row, fileErr = reader.reader.Read()
-	emptysToAppend := reader.minOutputLength - len(row)
-	if fileErr == io.EOF || fileErr == io.ErrClosedPipe {
-		return nil
-	} else if _, ok := fileErr.(*csv.ParseError); ok {
-		emptysToAppend = reader.minOutputLength
-	}
-
-	if emptysToAppend > 0 {
-		for counter := 0; counter < emptysToAppend; counter++ {
-			row = append(row, "")
-		}
-	}
-
-	return row
-}
-
-// CreateStatXML is the function which does the marshaling from the stat
-// structs into XML so that the progress and stat message can be sent
-func (reader *cinput) CreateStatXML() (string, error) {
-	if reader.options.Compressed == "NONE" {
-		reader.stats.BytesProcessed = reader.options.StreamSize
-		reader.stats.BytesScanned = reader.stats.BytesProcessed
-	}
-	out, err := xml.Marshal(&format.Stats{
-		BytesScanned:   reader.stats.BytesScanned,
-		BytesProcessed: reader.stats.BytesProcessed,
-		BytesReturned:  reader.stats.BytesReturned,
-	})
-	if err != nil {
-		return "", err
-	}
-	return xml.Header + string(out), nil
-}
-
-// CreateProgressXML is the function which does the marshaling from the progress
-// structs into XML so that the progress and stat message can be sent
-func (reader *cinput) CreateProgressXML() (string, error) {
-	if reader.options.HasHeader {
-		reader.stats.BytesProcessed += format.ProcessSize(reader.header)
-	}
-	if reader.options.Compressed == "NONE" {
-		reader.stats.BytesScanned = reader.stats.BytesProcessed
-	}
-	out, err := xml.Marshal(&format.Progress{
-		BytesScanned:   reader.stats.BytesScanned,
-		BytesProcessed: reader.stats.BytesProcessed,
-		BytesReturned:  reader.stats.BytesReturned,
-	})
-	if err != nil {
-		return "", err
-	}
-	return xml.Header + string(out), nil
-}
-
-// Type - return the data format type
-func (reader *cinput) Type() format.Type {
-	return format.CSV
-}
-
-// OutputType - return the data format type
-func (reader *cinput) OutputType() format.Type {
-	return reader.options.OutputType
-}
-
-// ColNameErrs is a function which makes sure that the headers are requested are
-// present in the file otherwise it throws an error.
-func (reader *cinput) ColNameErrs(columnNames []string) error {
-	for i := 0; i < len(columnNames); i++ {
-		if columnNames[i] == "" {
-			continue
-		}
-		if !format.IsInt(columnNames[i]) && !reader.options.HeaderOpt {
-			return format.ErrInvalidColumnIndex
-		}
-		if format.IsInt(columnNames[i]) {
-			tempInt, _ := strconv.Atoi(columnNames[i])
-			if tempInt > len(reader.Header()) || tempInt == 0 {
-				return format.ErrInvalidColumnIndex
-			}
-		} else {
-			if reader.options.HeaderOpt && !format.StringInSlice(columnNames[i], reader.Header()) {
-				return format.ErrParseInvalidPathComponent
-			}
-		}
-	}
-	return nil
-}

pkg/s3select/format/errors.go

@@ -1,38 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package format
-
-import "errors"
-
-// ErrTruncatedInput is an error if the object is not compressed properly and an
-// error occurs during decompression.
-var ErrTruncatedInput = errors.New("Object decompression failed. Check that the object is properly compressed using the format specified in the request")
-
-// ErrCSVParsingError is an error if the CSV presents an error while being
-// parsed.
-var ErrCSVParsingError = errors.New("Encountered an Error parsing the CSV file. Check the file and try again")
-
-// ErrInvalidColumnIndex is an error if you provide a column index which is not
-// valid.
-var ErrInvalidColumnIndex = errors.New("Column index in the SQL expression is invalid")
-
-// ErrParseInvalidPathComponent is an error that occurs if there is an invalid
-// path component.
-var ErrParseInvalidPathComponent = errors.New("The SQL expression contains an invalid path component")
-
-// ErrJSONParsingError is an error if while parsing the JSON an error arises.
-var ErrJSONParsingError = errors.New("Encountered an error parsing the JSON file. Check the file and try again")

pkg/s3select/format/helpers.go

@@ -1,50 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package format
-
-import "strconv"
-
-// IsInt - returns a true or false, whether a string can
-// be represented as an int.
-func IsInt(s string) bool {
-	_, err := strconv.Atoi(s)
-	return err == nil
-}
-
-// StringInSlice - this function finds whether a string is in a list
-func StringInSlice(x string, list []string) bool {
-	for _, y := range list {
-		if x == y {
-			return true
-		}
-	}
-	return false
-}
-
-// ProcessSize - this function processes size so that we can calculate bytes BytesProcessed.
-func ProcessSize(myrecord []string) int64 {
-	if len(myrecord) > 0 {
-		var size int64
-		size = int64(len(myrecord)-1) + 1
-		for i := range myrecord {
-			size += int64(len(myrecord[i]))
-		}
-
-		return size
-	}
-	return 0
-}

pkg/s3select/format/json/json.go

@@ -1,205 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package json
-
-import (
-	"bufio"
-	"encoding/xml"
-	"io"
-
-	"github.com/minio/minio/pkg/s3select/format"
-	"github.com/tidwall/gjson"
-)
-
-// Options options are passed to the underlying encoding/json reader.
-type Options struct {
-
-	// Name of the table that is used for querying
-	Name string
-
-	// ReadFrom is where the data will be read from.
-	ReadFrom io.Reader
-
-	// If true then we need to add gzip or bzip reader.
-	// to extract the csv.
-	Compressed string
-
-	// SQL expression meant to be evaluated.
-	Expression string
-
-	// Input record delimiter.
-	RecordDelimiter string
-
-	// Output CSV will be delimited by.
-	OutputFieldDelimiter string
-
-	// Output record delimiter.
-	OutputRecordDelimiter string
-
-	// Size of incoming object
-	StreamSize int64
-
-	// True if DocumentType is DOCUMENTS
-	DocumentType bool
-
-	// Progress enabled, enable/disable progress messages.
-	Progress bool
-
-	// Output format type, supported values are CSV and JSON
-	OutputType format.Type
-}
-
-// jinput represents a record producing input from a  formatted file or pipe.
-type jinput struct {
-	options         *Options
-	reader          *bufio.Reader
-	header          []string
-	minOutputLength int
-	stats           struct {
-		BytesScanned   int64
-		BytesReturned  int64
-		BytesProcessed int64
-	}
-}
-
-// New sets up a new, the first Json is read when this is run.
-// If there is a problem with reading the first Json, the error is returned.
-// Otherwise, the returned reader can be reliably consumed with jsonRead()
-// until jsonRead() returns nil.
-func New(opts *Options) (format.Select, error) {
-	reader := &jinput{
-		options: opts,
-		reader:  bufio.NewReader(opts.ReadFrom),
-	}
-	reader.stats.BytesScanned = opts.StreamSize
-	reader.stats.BytesProcessed = 0
-	reader.stats.BytesReturned = 0
-	return reader, nil
-}
-
-// Progress - return true if progress was requested.
-func (reader *jinput) Progress() bool {
-	return reader.options.Progress
-}
-
-// UpdateBytesProcessed - populates the bytes Processed
-func (reader *jinput) UpdateBytesProcessed(size int64) {
-	reader.stats.BytesProcessed += size
-}
-
-// Read the file and returns
-func (reader *jinput) Read() ([]byte, error) {
-	data, _, err := reader.reader.ReadLine()
-	if err != nil {
-		if err == io.EOF || err == io.ErrClosedPipe {
-			err = nil
-		} else {
-			err = format.ErrJSONParsingError
-		}
-	}
-	if err == nil {
-		var header []string
-		gjson.ParseBytes(data).ForEach(func(key, value gjson.Result) bool {
-			header = append(header, key.String())
-			return true
-		})
-		reader.header = header
-	}
-	return data, err
-}
-
-// OutputFieldDelimiter - returns the delimiter specified in input request,
-// for JSON output this value is empty, but does have a value when
-// output type is CSV.
-func (reader *jinput) OutputFieldDelimiter() string {
-	return reader.options.OutputFieldDelimiter
-}
-
-// OutputRecordDelimiter - returns the delimiter specified in input request, after each JSON record.
-func (reader *jinput) OutputRecordDelimiter() string {
-	return reader.options.OutputRecordDelimiter
-}
-
-// HasHeader - returns true or false depending upon the header.
-func (reader *jinput) HasHeader() bool {
-	return true
-}
-
-// Expression - return the Select Expression for
-func (reader *jinput) Expression() string {
-	return reader.options.Expression
-}
-
-// UpdateBytesReturned - updates the Bytes returned for
-func (reader *jinput) UpdateBytesReturned(size int64) {
-	reader.stats.BytesReturned += size
-}
-
-// Header returns a nil in case of
-func (reader *jinput) Header() []string {
-	return reader.header
-}
-
-// CreateStatXML is the function which does the marshaling from the stat
-// structs into XML so that the progress and stat message can be sent
-func (reader *jinput) CreateStatXML() (string, error) {
-	if reader.options.Compressed == "NONE" {
-		reader.stats.BytesProcessed = reader.options.StreamSize
-		reader.stats.BytesScanned = reader.stats.BytesProcessed
-	}
-	out, err := xml.Marshal(&format.Stats{
-		BytesScanned:   reader.stats.BytesScanned,
-		BytesProcessed: reader.stats.BytesProcessed,
-		BytesReturned:  reader.stats.BytesReturned,
-	})
-	if err != nil {
-		return "", err
-	}
-	return xml.Header + string(out), nil
-}
-
-// CreateProgressXML is the function which does the marshaling from the progress
-// structs into XML so that the progress and stat message can be sent
-func (reader *jinput) CreateProgressXML() (string, error) {
-	if !(reader.options.Compressed != "NONE") {
-		reader.stats.BytesScanned = reader.stats.BytesProcessed
-	}
-	out, err := xml.Marshal(&format.Progress{
-		BytesScanned:   reader.stats.BytesScanned,
-		BytesProcessed: reader.stats.BytesProcessed,
-		BytesReturned:  reader.stats.BytesReturned,
-	})
-	if err != nil {
-		return "", err
-	}
-	return xml.Header + string(out), nil
-}
-
-// Type - return the data format type {
-func (reader *jinput) Type() format.Type {
-	return format.JSON
-}
-
-// OutputType - return the data format type {
-func (reader *jinput) OutputType() format.Type {
-	return reader.options.OutputType
-}
-
-// ColNameErrs - this is a dummy function for JSON input type.
-func (reader *jinput) ColNameErrs(columnNames []string) error {
-	return nil
-}

pkg/s3select/format/select.go

@@ -1,65 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package format
-
-import "encoding/xml"
-
-// Select Interface helper methods, implementing features needed for
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-type Select interface {
-	Type() Type
-	OutputType() Type
-	Read() ([]byte, error)
-	Header() []string
-	HasHeader() bool
-	OutputFieldDelimiter() string
-	OutputRecordDelimiter() string
-	UpdateBytesProcessed(int64)
-	Expression() string
-	UpdateBytesReturned(int64)
-	CreateStatXML() (string, error)
-	CreateProgressXML() (string, error)
-	ColNameErrs(columnNames []string) error
-	Progress() bool
-}
-
-// Progress represents a struct that represents the format for XML of the
-// progress messages
-type Progress struct {
-	XMLName        xml.Name `xml:"Progress" json:"-"`
-	BytesScanned   int64    `xml:"BytesScanned"`
-	BytesProcessed int64    `xml:"BytesProcessed"`
-	BytesReturned  int64    `xml:"BytesReturned"`
-}
-
-// Stats represents a struct that represents the format for XML of the stat
-// messages
-type Stats struct {
-	XMLName        xml.Name `xml:"Stats" json:"-"`
-	BytesScanned   int64    `xml:"BytesScanned"`
-	BytesProcessed int64    `xml:"BytesProcessed"`
-	BytesReturned  int64    `xml:"BytesReturned"`
-}
-
-// Type different types of support data format types.
-type Type string
-
-// Different data format types.
-const (
-	JSON Type = "json"
-	CSV  Type = "csv"
-)

pkg/s3select/genmessage.go

@@ -0,0 +1,182 @@
+// +build ignore
+
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package s3select
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"hash/crc32"
+)
+
+func genRecordsHeader() {
+	buf := new(bytes.Buffer)
+
+	buf.WriteByte(13)
+	buf.WriteString(":message-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 5})
+	buf.WriteString("event")
+
+	buf.WriteByte(13)
+	buf.WriteString(":content-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 24})
+	buf.WriteString("application/octet-stream")
+
+	buf.WriteByte(11)
+	buf.WriteString(":event-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 7})
+	buf.WriteString("Records")
+
+	fmt.Println(buf.Bytes())
+}
+
+// Continuation Message
+// ====================
+// Header specification
+// --------------------
+// Continuation messages contain two headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-cont.png
+//
+// Payload specification
+// ---------------------
+// Continuation messages have no payload.
+func genContinuationMessage() {
+	buf := new(bytes.Buffer)
+
+	buf.WriteByte(13)
+	buf.WriteString(":message-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 5})
+	buf.WriteString("event")
+
+	buf.WriteByte(11)
+	buf.WriteString(":event-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 4})
+	buf.WriteString("Cont")
+
+	header := buf.Bytes()
+	headerLength := len(header)
+	payloadLength := 0
+	totalLength := totalByteLength(headerLength, payloadLength)
+
+	buf = new(bytes.Buffer)
+	binary.Write(buf, binary.BigEndian, uint32(totalLength))
+	binary.Write(buf, binary.BigEndian, uint32(headerLength))
+	prelude := buf.Bytes()
+	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(prelude))
+	buf.Write(header)
+	message := buf.Bytes()
+	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(message))
+
+	fmt.Println(buf.Bytes())
+}
+
+func genProgressHeader() {
+	buf := new(bytes.Buffer)
+
+	buf.WriteByte(13)
+	buf.WriteString(":message-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 5})
+	buf.WriteString("event")
+
+	buf.WriteByte(13)
+	buf.WriteString(":content-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 8})
+	buf.WriteString("text/xml")
+
+	buf.WriteByte(11)
+	buf.WriteString(":event-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 8})
+	buf.WriteString("Progress")
+
+	fmt.Println(buf.Bytes())
+}
+
+func genStatsHeader() {
+	buf := new(bytes.Buffer)
+
+	buf.WriteByte(13)
+	buf.WriteString(":message-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 5})
+	buf.WriteString("event")
+
+	buf.WriteByte(13)
+	buf.WriteString(":content-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 8})
+	buf.WriteString("text/xml")
+
+	buf.WriteByte(11)
+	buf.WriteString(":event-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 5})
+	buf.WriteString("Stats")
+
+	fmt.Println(buf.Bytes())
+}
+
+// End Message
+// ===========
+// Header specification
+// --------------------
+// End messages contain two headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-end.png
+//
+// Payload specification
+// ---------------------
+// End messages have no payload.
+func genEndMessage() {
+	buf := new(bytes.Buffer)
+
+	buf.WriteByte(13)
+	buf.WriteString(":message-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 5})
+	buf.WriteString("event")
+
+	buf.WriteByte(11)
+	buf.WriteString(":event-type")
+	buf.WriteByte(7)
+	buf.Write([]byte{0, 3})
+	buf.WriteString("End")
+
+	header := buf.Bytes()
+	headerLength := len(header)
+	payloadLength := 0
+	totalLength := totalByteLength(headerLength, payloadLength)
+
+	buf = new(bytes.Buffer)
+	binary.Write(buf, binary.BigEndian, uint32(totalLength))
+	binary.Write(buf, binary.BigEndian, uint32(headerLength))
+	prelude := buf.Bytes()
+	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(prelude))
+	buf.Write(header)
+	message := buf.Bytes()
+	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(message))
+
+	fmt.Println(buf.Bytes())
+}

pkg/s3select/helpers.go

@@ -1,563 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package s3select
-
-import (
-	"fmt"
-	"math"
-	"strconv"
-	"strings"
-
-	"github.com/minio/minio/pkg/s3select/format"
-	"github.com/tidwall/gjson"
-	"github.com/xwb1989/sqlparser"
-)
-
-// MaxExpressionLength - 256KiB
-const MaxExpressionLength = 256 * 1024
-
-// matchesMyWhereClause takes []byte, process the where clause and returns true if the row suffices
-func matchesMyWhereClause(record []byte, alias string, whereClause sqlparser.Expr) (bool, error) {
-	var conversionColumn string
-	var operator string
-	var operand gjson.Result
-	if fmt.Sprintf("%v", whereClause) == "false" {
-		return false, nil
-	}
-	switch expr := whereClause.(type) {
-	case *sqlparser.IsExpr:
-		return evaluateIsExpr(expr, record, alias)
-	case *sqlparser.RangeCond:
-		operator = expr.Operator
-		if operator != "between" && operator != "not between" {
-			return false, ErrUnsupportedSQLOperation
-		}
-		result, err := evaluateBetween(expr, alias, record)
-		if err != nil {
-			return false, err
-		}
-		if operator == "not between" {
-			return !result, nil
-		}
-		return result, nil
-	case *sqlparser.ComparisonExpr:
-		operator = expr.Operator
-		switch right := expr.Right.(type) {
-		case *sqlparser.FuncExpr:
-			operand = gjson.Parse(evaluateFuncExpr(right, "", record))
-		case *sqlparser.SQLVal:
-			operand = gjson.ParseBytes(right.Val)
-		}
-		var myVal string
-		switch left := expr.Left.(type) {
-		case *sqlparser.FuncExpr:
-			myVal = evaluateFuncExpr(left, "", record)
-			conversionColumn = ""
-		case *sqlparser.ColName:
-			conversionColumn = left.Name.CompliantName()
-		}
-		if myVal != "" {
-			return evaluateOperator(gjson.Parse(myVal), operator, operand)
-		}
-		return evaluateOperator(gjson.GetBytes(record, conversionColumn), operator, operand)
-	case *sqlparser.AndExpr:
-		var leftVal bool
-		var rightVal bool
-		switch left := expr.Left.(type) {
-		case *sqlparser.ComparisonExpr:
-			temp, err := matchesMyWhereClause(record, alias, left)
-			if err != nil {
-				return false, err
-			}
-			leftVal = temp
-		}
-		switch right := expr.Right.(type) {
-		case *sqlparser.ComparisonExpr:
-			temp, err := matchesMyWhereClause(record, alias, right)
-			if err != nil {
-				return false, err
-			}
-			rightVal = temp
-		}
-		return (rightVal && leftVal), nil
-	case *sqlparser.OrExpr:
-		var leftVal bool
-		var rightVal bool
-		switch left := expr.Left.(type) {
-		case *sqlparser.ComparisonExpr:
-			leftVal, _ = matchesMyWhereClause(record, alias, left)
-
-		}
-		switch right := expr.Right.(type) {
-		case *sqlparser.ComparisonExpr:
-			rightVal, _ = matchesMyWhereClause(record, alias, right)
-		}
-		return (rightVal || leftVal), nil
-	}
-	return true, nil
-}
-
-func applyStrFunc(rawArg gjson.Result, funcName string) string {
-	switch strings.ToUpper(funcName) {
-	case "TRIM":
-		// parser has an issue which does not allow it to support
-		// Trim with other arguments
-		return strings.Trim(rawArg.String(), " ")
-	case "SUBSTRING":
-		// TODO: parser has an issue which does not support substring
-		return rawArg.String()
-	case "CHAR_LENGTH":
-		return strconv.Itoa(len(rawArg.String()))
-	case "CHARACTER_LENGTH":
-		return strconv.Itoa(len(rawArg.String()))
-	case "LOWER":
-		return strings.ToLower(rawArg.String())
-	case "UPPER":
-		return strings.ToUpper(rawArg.String())
-	}
-	return rawArg.String()
-
-}
-
-// evaluateBetween is a function which evaluates a Between Clause.
-func evaluateBetween(betweenExpr *sqlparser.RangeCond, alias string, record []byte) (bool, error) {
-	var colToVal gjson.Result
-	var colFromVal gjson.Result
-	var conversionColumn string
-	var funcName string
-	switch colTo := betweenExpr.To.(type) {
-	case sqlparser.Expr:
-		switch colToMyVal := colTo.(type) {
-		case *sqlparser.FuncExpr:
-			colToVal = gjson.Parse(stringOps(colToMyVal, record, ""))
-		case *sqlparser.SQLVal:
-			colToVal = gjson.ParseBytes(colToMyVal.Val)
-		}
-	}
-	switch colFrom := betweenExpr.From.(type) {
-	case sqlparser.Expr:
-		switch colFromMyVal := colFrom.(type) {
-		case *sqlparser.FuncExpr:
-			colFromVal = gjson.Parse(stringOps(colFromMyVal, record, ""))
-		case *sqlparser.SQLVal:
-			colFromVal = gjson.ParseBytes(colFromMyVal.Val)
-		}
-	}
-	var myFuncVal string
-	switch left := betweenExpr.Left.(type) {
-	case *sqlparser.FuncExpr:
-		myFuncVal = evaluateFuncExpr(left, "", record)
-		conversionColumn = ""
-	case *sqlparser.ColName:
-		conversionColumn = cleanCol(left.Name.CompliantName(), alias)
-	}
-	toGreater, err := evaluateOperator(colToVal, ">", colFromVal)
-	if err != nil {
-		return false, err
-	}
-	if toGreater {
-		return evalBetweenGreater(conversionColumn, record, funcName, colFromVal, colToVal, myFuncVal)
-	}
-	return evalBetweenLess(conversionColumn, record, funcName, colFromVal, colToVal, myFuncVal)
-}
-
-func evalBetween(conversionColumn string, record []byte, funcName string, colFromVal gjson.Result, colToVal gjson.Result, myColVal string, operator string) (bool, error) {
-	if format.IsInt(conversionColumn) {
-		myVal, err := evaluateOperator(gjson.GetBytes(record, "_"+conversionColumn), operator, colFromVal)
-		if err != nil {
-			return false, err
-		}
-		var myOtherVal bool
-		myOtherVal, err = evaluateOperator(colToVal, operator, gjson.GetBytes(record, "_"+conversionColumn))
-		if err != nil {
-			return false, err
-		}
-		return (myVal && myOtherVal), nil
-	}
-	if myColVal != "" {
-		myVal, err := evaluateOperator(gjson.Parse(myColVal), operator, colFromVal)
-		if err != nil {
-			return false, err
-		}
-		var myOtherVal bool
-		myOtherVal, err = evaluateOperator(colToVal, operator, gjson.Parse(myColVal))
-		if err != nil {
-			return false, err
-		}
-		return (myVal && myOtherVal), nil
-	}
-	myVal, err := evaluateOperator(gjson.GetBytes(record, conversionColumn), operator, colFromVal)
-	if err != nil {
-		return false, err
-	}
-	var myOtherVal bool
-	myOtherVal, err = evaluateOperator(colToVal, operator, gjson.GetBytes(record, conversionColumn))
-	if err != nil {
-		return false, err
-	}
-	return (myVal && myOtherVal), nil
-}
-
-// evalBetweenGreater is a function which evaluates the between given that the
-// TO is > than the FROM.
-func evalBetweenGreater(conversionColumn string, record []byte, funcName string, colFromVal gjson.Result, colToVal gjson.Result, myColVal string) (bool, error) {
-	return evalBetween(conversionColumn, record, funcName, colFromVal, colToVal, myColVal, ">=")
-}
-
-// evalBetweenLess is a function which evaluates the between given that the
-// FROM is > than the TO.
-func evalBetweenLess(conversionColumn string, record []byte, funcName string, colFromVal gjson.Result, colToVal gjson.Result, myColVal string) (bool, error) {
-	return evalBetween(conversionColumn, record, funcName, colFromVal, colToVal, myColVal, "<=")
-}
-
-// This is a really important function it actually evaluates the boolean
-// statement and therefore actually returns a bool, it functions as the lowest
-// level of the state machine.
-func evaluateOperator(myTblVal gjson.Result, operator string, operand gjson.Result) (bool, error) {
-	if err := checkValidOperator(operator); err != nil {
-		return false, err
-	}
-	if !myTblVal.Exists() {
-		return false, nil
-	}
-	switch {
-	case operand.Type == gjson.String || operand.Type == gjson.Null:
-		return stringEval(myTblVal.String(), operator, operand.String())
-	case operand.Type == gjson.Number:
-		opInt := format.IsInt(operand.Raw)
-		tblValInt := format.IsInt(strings.Trim(myTblVal.Raw, "\""))
-		if opInt && tblValInt {
-			return intEval(int64(myTblVal.Float()), operator, operand.Int())
-		}
-		if !opInt && !tblValInt {
-			return floatEval(myTblVal.Float(), operator, operand.Float())
-		}
-		switch operator {
-		case "!=":
-			return true, nil
-		}
-		return false, nil
-	case myTblVal.Type != operand.Type:
-		return false, nil
-	default:
-		return false, ErrUnsupportedSyntax
-	}
-}
-
-// checkValidOperator ensures that the current operator is supported
-func checkValidOperator(operator string) error {
-	listOfOps := []string{">", "<", "=", "<=", ">=", "!=", "like"}
-	for i := range listOfOps {
-		if operator == listOfOps[i] {
-			return nil
-		}
-	}
-	return ErrParseUnknownOperator
-}
-
-// stringEval is for evaluating the state of string comparison.
-func stringEval(myRecordVal string, operator string, myOperand string) (bool, error) {
-	switch operator {
-	case ">":
-		return myRecordVal > myOperand, nil
-	case "<":
-		return myRecordVal < myOperand, nil
-	case "=":
-		return myRecordVal == myOperand, nil
-	case "<=":
-		return myRecordVal <= myOperand, nil
-	case ">=":
-		return myRecordVal >= myOperand, nil
-	case "!=":
-		return myRecordVal != myOperand, nil
-	case "like":
-		return likeConvert(myOperand, myRecordVal)
-	}
-	return false, ErrUnsupportedSyntax
-}
-
-// intEval is for evaluating integer comparisons.
-func intEval(myRecordVal int64, operator string, myOperand int64) (bool, error) {
-
-	switch operator {
-	case ">":
-		return myRecordVal > myOperand, nil
-	case "<":
-		return myRecordVal < myOperand, nil
-	case "=":
-		return myRecordVal == myOperand, nil
-	case "<=":
-		return myRecordVal <= myOperand, nil
-	case ">=":
-		return myRecordVal >= myOperand, nil
-	case "!=":
-		return myRecordVal != myOperand, nil
-	}
-	return false, ErrUnsupportedSyntax
-}
-
-// floatEval is for evaluating the comparison of floats.
-func floatEval(myRecordVal float64, operator string, myOperand float64) (bool, error) {
-	// Basically need some logic thats like, if the types dont match check for a cast
-	switch operator {
-	case ">":
-		return myRecordVal > myOperand, nil
-	case "<":
-		return myRecordVal < myOperand, nil
-	case "=":
-		return myRecordVal == myOperand, nil
-	case "<=":
-		return myRecordVal <= myOperand, nil
-	case ">=":
-		return myRecordVal >= myOperand, nil
-	case "!=":
-		return myRecordVal != myOperand, nil
-	}
-	return false, ErrUnsupportedSyntax
-}
-
-// prefixMatch allows for matching a prefix only like query e.g a%
-func prefixMatch(pattern string, record string) bool {
-	for i := 0; i < len(pattern)-1; i++ {
-		if pattern[i] != record[i] && pattern[i] != byte('_') {
-			return false
-		}
-	}
-	return true
-}
-
-// suffixMatch allows for matching a suffix only like query e.g %an
-func suffixMatch(pattern string, record string) bool {
-	for i := len(pattern) - 1; i > 0; i-- {
-		if pattern[i] != record[len(record)-(len(pattern)-i)] && pattern[i] != byte('_') {
-			return false
-		}
-	}
-	return true
-}
-
-// This function is for evaluating select statements which are case sensitive
-func likeConvert(pattern string, record string) (bool, error) {
-	// If pattern is empty just return false
-	if pattern == "" || record == "" {
-		return false, nil
-	}
-	// for suffix match queries e.g %a
-	if len(pattern) >= 2 && pattern[0] == byte('%') && strings.Count(pattern, "%") == 1 {
-		return suffixMatch(pattern, record), nil
-	}
-	// for prefix match queries e.g a%
-	if len(pattern) >= 2 && pattern[len(pattern)-1] == byte('%') && strings.Count(pattern, "%") == 1 {
-		return prefixMatch(pattern, record), nil
-	}
-	charCount := 0
-	currPos := 0
-	// Loop through the pattern so that a boolean can be returned
-	for i := 0; i < len(pattern); i++ {
-		if pattern[i] == byte('_') {
-			// if its an underscore it can be anything so shift current position for
-			// pattern and string
-			charCount++
-			// if there have been more characters in the pattern than record, clearly
-			// there should be a return
-			if i != len(pattern)-1 {
-				if pattern[i+1] != byte('%') && pattern[i+1] != byte('_') {
-					if currPos != len(record)-1 && pattern[i+1] != record[currPos+1] {
-						return false, nil
-					}
-				}
-			}
-			if charCount > len(record) {
-				return false, nil
-			}
-			// if the pattern has been fully evaluated, then just return.
-			if len(pattern) == i+1 {
-				return true, nil
-			}
-			i++
-			currPos++
-		}
-		if pattern[i] == byte('%') || pattern[i] == byte('*') {
-			// if there is a wildcard then want to return true if its last and flag it.
-			if currPos == len(record) {
-				return false, nil
-			}
-			if i+1 == len(pattern) {
-				return true, nil
-			}
-		} else {
-			charCount++
-			matched := false
-			// iterate through the pattern and check if there is a match for the
-			// character
-			for currPos < len(record) {
-				if record[currPos] == pattern[i] || pattern[i] == byte('_') {
-					matched = true
-					break
-				}
-				currPos++
-			}
-			currPos++
-			// if the character did not match then return should occur.
-			if !matched {
-				return false, nil
-			}
-		}
-	}
-	if charCount > len(record) {
-		return false, nil
-	}
-	if currPos < len(record) {
-		return false, nil
-	}
-	return true, nil
-}
-
-// cleanCol cleans a column name from the parser so that the name is returned to
-// original.
-func cleanCol(myCol string, alias string) string {
-	if len(myCol) <= 0 {
-		return myCol
-	}
-	if !strings.HasPrefix(myCol, alias) && myCol[0] == '_' {
-		myCol = alias + myCol
-	}
-
-	if strings.Contains(myCol, ".") {
-		myCol = strings.Replace(myCol, alias+"._", "", len(myCol))
-	}
-	myCol = strings.Replace(myCol, alias+"_", "", len(myCol))
-	return myCol
-}
-
-// whereClauseNameErrs is a function which returns an error if there is a column
-// in the where clause which does not exist.
-func whereClauseNameErrs(whereClause interface{}, alias string, f format.Select) error {
-	var conversionColumn string
-	switch expr := whereClause.(type) {
-	// case for checking errors within a clause of the form "col_name is ..."
-	case *sqlparser.IsExpr:
-		switch myCol := expr.Expr.(type) {
-		case *sqlparser.FuncExpr:
-			if err := evaluateFuncErr(myCol, f); err != nil {
-				return err
-			}
-		case *sqlparser.ColName:
-			conversionColumn = cleanCol(myCol.Name.CompliantName(), alias)
-		}
-	case *sqlparser.RangeCond:
-		switch left := expr.Left.(type) {
-		case *sqlparser.FuncExpr:
-			if err := evaluateFuncErr(left, f); err != nil {
-				return err
-			}
-		case *sqlparser.ColName:
-			conversionColumn = cleanCol(left.Name.CompliantName(), alias)
-		}
-	case *sqlparser.ComparisonExpr:
-		switch left := expr.Left.(type) {
-		case *sqlparser.FuncExpr:
-			if err := evaluateFuncErr(left, f); err != nil {
-				return err
-			}
-		case *sqlparser.ColName:
-			conversionColumn = cleanCol(left.Name.CompliantName(), alias)
-		}
-	case *sqlparser.AndExpr:
-		switch left := expr.Left.(type) {
-		case *sqlparser.ComparisonExpr:
-			return whereClauseNameErrs(left, alias, f)
-		}
-		switch right := expr.Right.(type) {
-		case *sqlparser.ComparisonExpr:
-			return whereClauseNameErrs(right, alias, f)
-		}
-	case *sqlparser.OrExpr:
-		switch left := expr.Left.(type) {
-		case *sqlparser.ComparisonExpr:
-			return whereClauseNameErrs(left, alias, f)
-		}
-		switch right := expr.Right.(type) {
-		case *sqlparser.ComparisonExpr:
-			return whereClauseNameErrs(right, alias, f)
-		}
-	}
-	if conversionColumn != "" {
-		return f.ColNameErrs([]string{conversionColumn})
-	}
-	return nil
-}
-
-// aggFuncToStr converts an array of floats into a properly formatted string.
-func aggFuncToStr(aggVals []float64, f format.Select) string {
-	// Define a number formatting function
-	numToStr := func(f float64) string {
-		if f == math.Trunc(f) {
-			return strconv.FormatInt(int64(f), 10)
-		}
-		return strconv.FormatFloat(f, 'f', 6, 64)
-	}
-
-	// Display all whole numbers in aggVals as integers
-	vals := make([]string, len(aggVals))
-	for i, v := range aggVals {
-		vals[i] = numToStr(v)
-	}
-
-	// Intersperse field delimiter
-	return strings.Join(vals, f.OutputFieldDelimiter())
-}
-
-// checkForDuplicates ensures we do not have an ambigious column name.
-func checkForDuplicates(columns []string, columnsMap map[string]int) error {
-	for i, column := range columns {
-		columns[i] = strings.Replace(column, " ", "_", len(column))
-		if _, exist := columnsMap[columns[i]]; exist {
-			return ErrAmbiguousFieldName
-		}
-		columnsMap[columns[i]] = i
-	}
-	return nil
-}
-
-// parseErrs is the function which handles all the errors that could occur
-// through use of function arguments such as column names in NULLIF
-func parseErrs(columnNames []string, whereClause interface{}, alias string, myFuncs SelectFuncs, f format.Select) error {
-	// Below code cleans up column names.
-	processColumnNames(columnNames, alias, f)
-	if columnNames[0] != "*" {
-		if err := f.ColNameErrs(columnNames); err != nil {
-			return err
-		}
-	}
-	// Below code ensures the whereClause has no errors.
-	if whereClause != nil {
-		tempClause := whereClause
-		if err := whereClauseNameErrs(tempClause, alias, f); err != nil {
-			return err
-		}
-	}
-	for i := 0; i < len(myFuncs.funcExpr); i++ {
-		if myFuncs.funcExpr[i] == nil {
-			continue
-		}
-		if err := evaluateFuncErr(myFuncs.funcExpr[i], f); err != nil {
-			return err
-		}
-	}
-	return nil
-}

pkg/s3select/input.go

@@ -1,224 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package s3select
-
-import (
-	"bytes"
-	"compress/bzip2"
-	"io"
-	"net/http"
-	"strings"
-	"time"
-
-	humanize "github.com/dustin/go-humanize"
-	"github.com/klauspost/pgzip"
-
-	"github.com/minio/minio/pkg/s3select/format"
-	"github.com/minio/minio/pkg/s3select/format/csv"
-	"github.com/minio/minio/pkg/s3select/format/json"
-)
-
-const (
-	// progressTime is the time interval for which a progress message is sent.
-	progressTime time.Duration = 60 * time.Second
-	// continuationTime is the time interval for which a continuation message is
-	// sent.
-	continuationTime time.Duration = 5 * time.Second
-)
-
-// Row is a Struct for keeping track of key aspects of a row.
-type Row struct {
-	record string
-	err    error
-}
-
-// This function replaces "",'' with `` for the select parser
-func cleanExpr(expr string) string {
-	r := strings.NewReplacer("\"", "`")
-	return r.Replace(expr)
-}
-
-// New - initialize new select format
-func New(reader io.Reader, size int64, req ObjectSelectRequest) (s3s format.Select, err error) {
-	switch req.InputSerialization.CompressionType {
-	case SelectCompressionGZIP:
-		if reader, err = pgzip.NewReader(reader); err != nil {
-			return nil, format.ErrTruncatedInput
-		}
-	case SelectCompressionBZIP:
-		reader = bzip2.NewReader(reader)
-	}
-
-	//  Initializating options for CSV
-	if req.InputSerialization.CSV != nil {
-		if req.InputSerialization.CSV.FileHeaderInfo == "" {
-			req.InputSerialization.CSV.FileHeaderInfo = CSVFileHeaderInfoNone
-		}
-		if req.InputSerialization.CSV.RecordDelimiter == "" {
-			req.InputSerialization.CSV.RecordDelimiter = "\n"
-		}
-		options := &csv.Options{
-			Name:            "S3Object", // Default table name for all objects
-			HasHeader:       req.InputSerialization.CSV.FileHeaderInfo == CSVFileHeaderInfoUse,
-			RecordDelimiter: req.InputSerialization.CSV.RecordDelimiter,
-			FieldDelimiter:  req.InputSerialization.CSV.FieldDelimiter,
-			Comments:        req.InputSerialization.CSV.Comments,
-			ReadFrom:        reader,
-			Compressed:      string(req.InputSerialization.CompressionType),
-			Expression:      cleanExpr(req.Expression),
-			StreamSize:      size,
-			HeaderOpt:       req.InputSerialization.CSV.FileHeaderInfo == CSVFileHeaderInfoUse,
-			Progress:        req.RequestProgress.Enabled,
-		}
-		if req.OutputSerialization.CSV != nil {
-			if req.OutputSerialization.CSV.FieldDelimiter == "" {
-				req.OutputSerialization.CSV.FieldDelimiter = ","
-			}
-			options.OutputFieldDelimiter = req.OutputSerialization.CSV.FieldDelimiter
-			options.OutputRecordDelimiter = req.OutputSerialization.CSV.RecordDelimiter
-			options.OutputType = format.CSV
-		}
-		if req.OutputSerialization.JSON != nil {
-			options.OutputRecordDelimiter = req.OutputSerialization.JSON.RecordDelimiter
-			options.OutputType = format.JSON
-		}
-		// Initialize CSV input type
-		s3s, err = csv.New(options)
-	} else if req.InputSerialization.JSON != nil {
-		options := &json.Options{
-			Name:         "S3Object", // Default table name for all objects
-			ReadFrom:     reader,
-			Compressed:   string(req.InputSerialization.CompressionType),
-			Expression:   cleanExpr(req.Expression),
-			StreamSize:   size,
-			DocumentType: req.InputSerialization.JSON.Type == JSONTypeDocument,
-			Progress:     req.RequestProgress.Enabled,
-		}
-		if req.OutputSerialization.JSON != nil {
-			options.OutputRecordDelimiter = req.OutputSerialization.JSON.RecordDelimiter
-			options.OutputType = format.JSON
-		}
-		if req.OutputSerialization.CSV != nil {
-			options.OutputFieldDelimiter = req.OutputSerialization.CSV.FieldDelimiter
-			options.OutputRecordDelimiter = req.OutputSerialization.CSV.RecordDelimiter
-			options.OutputType = format.CSV
-		}
-		// Initialize JSON input type
-		s3s, err = json.New(options)
-	}
-	return s3s, err
-}
-
-// Execute is the function where all the blocking occurs, It writes to the HTTP
-// response writer in a streaming fashion so that the client can actively use
-// the results before the query is finally finished executing. The
-func Execute(writer io.Writer, f format.Select) error {
-	rowCh := make(chan Row)
-	curBuf := bytes.NewBuffer(make([]byte, humanize.MiByte))
-	curBuf.Reset()
-	progressTicker := time.NewTicker(progressTime)
-	continuationTimer := time.NewTimer(continuationTime)
-	defer progressTicker.Stop()
-	defer continuationTimer.Stop()
-
-	go runSelectParser(f, rowCh)
-	for {
-		select {
-		case row, ok := <-rowCh:
-			if ok && row.err != nil {
-				_, err := writeErrorMessage(row.err, curBuf).WriteTo(writer)
-				flusher, okFlush := writer.(http.Flusher)
-				if okFlush {
-					flusher.Flush()
-				}
-				if err != nil {
-					return err
-				}
-				curBuf.Reset()
-				close(rowCh)
-				return nil
-			} else if ok {
-				_, err := writeRecordMessage(row.record, curBuf).WriteTo(writer)
-				flusher, okFlush := writer.(http.Flusher)
-				if okFlush {
-					flusher.Flush()
-				}
-				if err != nil {
-					return err
-				}
-				curBuf.Reset()
-				f.UpdateBytesReturned(int64(len(row.record)))
-				if !continuationTimer.Stop() {
-					<-continuationTimer.C
-				}
-				continuationTimer.Reset(continuationTime)
-			} else if !ok {
-				statPayload, err := f.CreateStatXML()
-				if err != nil {
-					return err
-				}
-				_, err = writeStatMessage(statPayload, curBuf).WriteTo(writer)
-				flusher, ok := writer.(http.Flusher)
-				if ok {
-					flusher.Flush()
-				}
-				if err != nil {
-					return err
-				}
-				curBuf.Reset()
-				_, err = writeEndMessage(curBuf).WriteTo(writer)
-				flusher, ok = writer.(http.Flusher)
-				if ok {
-					flusher.Flush()
-				}
-				if err != nil {
-					return err
-				}
-				return nil
-			}
-
-		case <-progressTicker.C:
-			// Send progress messages only if requested by client.
-			if f.Progress() {
-				progressPayload, err := f.CreateProgressXML()
-				if err != nil {
-					return err
-				}
-				_, err = writeProgressMessage(progressPayload, curBuf).WriteTo(writer)
-				flusher, ok := writer.(http.Flusher)
-				if ok {
-					flusher.Flush()
-				}
-				if err != nil {
-					return err
-				}
-				curBuf.Reset()
-			}
-		case <-continuationTimer.C:
-			_, err := writeContinuationMessage(curBuf).WriteTo(writer)
-			flusher, ok := writer.(http.Flusher)
-			if ok {
-				flusher.Flush()
-			}
-			if err != nil {
-				return err
-			}
-			curBuf.Reset()
-			continuationTimer.Reset(continuationTime)
-		}
-	}
-}

pkg/s3select/json/args.go

@@ -0,0 +1,95 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package json
+
+import (
+	"encoding/xml"
+	"fmt"
+	"strings"
+)
+
+const (
+	document = "document"
+	lines    = "lines"
+
+	defaultRecordDelimiter = "\n"
+)
+
+// ReaderArgs - represents elements inside <InputSerialization><JSON/> in request XML.
+type ReaderArgs struct {
+	ContentType string `xml:"Type"`
+	unmarshaled bool
+}
+
+// IsEmpty - returns whether reader args is empty or not.
+func (args *ReaderArgs) IsEmpty() bool {
+	return !args.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (args *ReaderArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subReaderArgs ReaderArgs
+	parsedArgs := subReaderArgs{}
+	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
+		return err
+	}
+
+	parsedArgs.ContentType = strings.ToLower(parsedArgs.ContentType)
+	switch parsedArgs.ContentType {
+	case document, lines:
+	default:
+		return errInvalidJSONType(fmt.Errorf("invalid ContentType '%v'", parsedArgs.ContentType))
+	}
+
+	*args = ReaderArgs(parsedArgs)
+	args.unmarshaled = true
+	return nil
+}
+
+// WriterArgs - represents elements inside <OutputSerialization><JSON/> in request XML.
+type WriterArgs struct {
+	RecordDelimiter string `xml:"RecordDelimiter"`
+	unmarshaled     bool
+}
+
+// IsEmpty - returns whether writer args is empty or not.
+func (args *WriterArgs) IsEmpty() bool {
+	return !args.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (args *WriterArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subWriterArgs WriterArgs
+	parsedArgs := subWriterArgs{}
+	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
+		return err
+	}
+
+	switch len(parsedArgs.RecordDelimiter) {
+	case 0:
+		parsedArgs.RecordDelimiter = defaultRecordDelimiter
+	case 1, 2:
+	default:
+		return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
+	}
+
+	*args = WriterArgs(parsedArgs)
+	args.unmarshaled = true
+	return nil
+}

pkg/s3select/json/errors.go

@@ -0,0 +1,62 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package json
+
+type s3Error struct {
+	code       string
+	message    string
+	statusCode int
+	cause      error
+}
+
+func (err *s3Error) Cause() error {
+	return err.cause
+}
+
+func (err *s3Error) ErrorCode() string {
+	return err.code
+}
+
+func (err *s3Error) ErrorMessage() string {
+	return err.message
+}
+
+func (err *s3Error) HTTPStatusCode() int {
+	return err.statusCode
+}
+
+func (err *s3Error) Error() string {
+	return err.message
+}
+
+func errInvalidJSONType(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidJsonType",
+		message:    "The JsonType is invalid. Only DOCUMENT and LINES are supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errJSONParsingError(err error) *s3Error {
+	return &s3Error{
+		code:       "JSONParsingError",
+		message:    "Encountered an error parsing the JSON file. Check the file and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}

pkg/s3select/json/reader.go

@@ -0,0 +1,217 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package json
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+	"strconv"
+
+	"github.com/minio/minio/pkg/s3select/sql"
+	"github.com/tidwall/gjson"
+	"github.com/tidwall/sjson"
+)
+
+func toSingleLineJSON(input string, currentKey string, result gjson.Result) (output string, err error) {
+	switch {
+	case result.IsObject():
+		result.ForEach(func(key, value gjson.Result) bool {
+			jsonKey := key.String()
+			if currentKey != "" {
+				jsonKey = currentKey + "." + key.String()
+			}
+			output, err = toSingleLineJSON(input, jsonKey, value)
+			input = output
+			return err == nil
+		})
+	case result.IsArray():
+		i := 0
+		result.ForEach(func(key, value gjson.Result) bool {
+			if currentKey == "" {
+				panic("currentKey is empty")
+			}
+
+			indexKey := currentKey + "." + strconv.Itoa(i)
+			output, err = toSingleLineJSON(input, indexKey, value)
+			input = output
+			i++
+			return err == nil
+		})
+	default:
+		output, err = sjson.Set(input, currentKey, result.Value())
+	}
+
+	return output, err
+}
+
+type objectReader struct {
+	reader io.Reader
+	err    error
+
+	p     []byte
+	start int
+	end   int
+
+	escaped     bool
+	quoteOpened bool
+	curlyCount  uint64
+	endOfObject bool
+}
+
+func (or *objectReader) objectEndIndex(p []byte, length int) int {
+	for i := 0; i < length; i++ {
+		if p[i] == '\\' {
+			or.escaped = !or.escaped
+			continue
+		}
+
+		if p[i] == '"' && !or.escaped {
+			or.quoteOpened = !or.quoteOpened
+		}
+
+		or.escaped = false
+
+		switch p[i] {
+		case '{':
+			if !or.quoteOpened {
+				or.curlyCount++
+			}
+		case '}':
+			if or.quoteOpened || or.curlyCount == 0 {
+				break
+			}
+
+			if or.curlyCount--; or.curlyCount == 0 {
+				return i + 1
+			}
+		}
+	}
+
+	return -1
+}
+
+func (or *objectReader) Read(p []byte) (n int, err error) {
+	if or.endOfObject {
+		return 0, io.EOF
+	}
+
+	if or.p != nil {
+		n = copy(p, or.p[or.start:or.end])
+		or.start += n
+		if or.start == or.end {
+			// made full copy.
+			or.p = nil
+			or.start = 0
+			or.end = 0
+		}
+	} else {
+		if or.err != nil {
+			return 0, or.err
+		}
+
+		n, err = or.reader.Read(p)
+		or.err = err
+		switch err {
+		case nil:
+		case io.EOF, io.ErrUnexpectedEOF, io.ErrClosedPipe:
+			or.err = io.EOF
+		default:
+			return 0, err
+		}
+	}
+
+	index := or.objectEndIndex(p, n)
+	if index == -1 || index == n {
+		return n, nil
+	}
+
+	or.endOfObject = true
+	if or.p == nil {
+		or.p = p
+		or.start = index
+		or.end = n
+	} else {
+		or.start -= index
+	}
+
+	return index, nil
+}
+
+func (or *objectReader) Reset() error {
+	or.endOfObject = false
+
+	if or.p != nil {
+		return nil
+	}
+
+	return or.err
+}
+
+// Reader - JSON record reader for S3Select.
+type Reader struct {
+	args         *ReaderArgs
+	objectReader *objectReader
+	readCloser   io.ReadCloser
+}
+
+// Read - reads single record.
+func (r *Reader) Read() (sql.Record, error) {
+	if err := r.objectReader.Reset(); err != nil {
+		return nil, err
+	}
+
+	data, err := ioutil.ReadAll(r.objectReader)
+	if err != nil {
+		return nil, errJSONParsingError(err)
+	}
+
+	data = bytes.TrimSpace(data)
+	if len(data) == 0 {
+		return nil, io.EOF
+	}
+
+	if !gjson.ValidBytes(data) {
+		return nil, errJSONParsingError(err)
+	}
+
+	if bytes.Count(data, []byte("\n")) > 0 {
+		var s string
+		if s, err = toSingleLineJSON("", "", gjson.ParseBytes(data)); err != nil {
+			return nil, errJSONParsingError(err)
+		}
+		data = []byte(s)
+	}
+
+	return &Record{
+		data: data,
+	}, nil
+}
+
+// Close - closes underlaying reader.
+func (r *Reader) Close() error {
+	return r.readCloser.Close()
+}
+
+// NewReader - creates new JSON reader using readCloser.
+func NewReader(readCloser io.ReadCloser, args *ReaderArgs) *Reader {
+	return &Reader{
+		args:         args,
+		objectReader: &objectReader{reader: readCloser},
+		readCloser:   readCloser,
+	}
+}

pkg/s3select/json/record.go

@@ -0,0 +1,107 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package json
+
+import (
+	"bytes"
+	"encoding/csv"
+	"fmt"
+	"strings"
+
+	"github.com/minio/minio/pkg/s3select/sql"
+	"github.com/tidwall/gjson"
+	"github.com/tidwall/sjson"
+)
+
+// Record - is JSON record.
+type Record struct {
+	data []byte
+}
+
+// Get - gets the value for a column name.
+func (r *Record) Get(name string) (*sql.Value, error) {
+	result := gjson.GetBytes(r.data, name)
+	switch result.Type {
+	case gjson.False:
+		return sql.NewBool(false), nil
+	case gjson.Number:
+		return sql.NewFloat(result.Float()), nil
+	case gjson.String:
+		return sql.NewString(result.String()), nil
+	case gjson.True:
+		return sql.NewBool(true), nil
+	}
+
+	return nil, fmt.Errorf("unsupported gjson value %v; %v", result, result.Type)
+}
+
+// Set - sets the value for a column name.
+func (r *Record) Set(name string, value *sql.Value) (err error) {
+	var v interface{}
+	switch value.Type() {
+	case sql.Bool:
+		v = value.BoolValue()
+	case sql.Int:
+		v = value.IntValue()
+	case sql.Float:
+		v = value.FloatValue()
+	case sql.String:
+		v = value.StringValue()
+	default:
+		return fmt.Errorf("unsupported sql value %v and type %v", value, value.Type())
+	}
+
+	name = strings.Replace(name, "*", "__ALL__", -1)
+	r.data, err = sjson.SetBytes(r.data, name, v)
+	return err
+}
+
+// MarshalCSV - encodes to CSV data.
+func (r *Record) MarshalCSV(fieldDelimiter rune) ([]byte, error) {
+	var csvRecord []string
+	result := gjson.ParseBytes(r.data)
+	result.ForEach(func(key, value gjson.Result) bool {
+		csvRecord = append(csvRecord, value.String())
+		return true
+	})
+
+	buf := new(bytes.Buffer)
+	w := csv.NewWriter(buf)
+	w.Comma = fieldDelimiter
+	if err := w.Write(csvRecord); err != nil {
+		return nil, err
+	}
+	w.Flush()
+	if err := w.Error(); err != nil {
+		return nil, err
+	}
+
+	data := buf.Bytes()
+	return data[:len(data)-1], nil
+}
+
+// MarshalJSON - encodes to JSON data.
+func (r *Record) MarshalJSON() ([]byte, error) {
+	return r.data, nil
+}
+
+// NewRecord - creates new empty JSON record.
+func NewRecord() *Record {
+	return &Record{
+		data: []byte("{}"),
+	}
+}

pkg/s3select/message.go

@@ -0,0 +1,384 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package s3select
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"hash/crc32"
+	"net/http"
+	"strconv"
+	"sync/atomic"
+	"time"
+)
+
+// A message is in the format specified in
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-frame-overview.png
+// hence the calculation is made accordingly.
+func totalByteLength(headerLength, payloadLength int) int {
+	return 4 + 4 + 4 + headerLength + payloadLength + 4
+}
+
+func genMessage(header, payload []byte) []byte {
+	headerLength := len(header)
+	payloadLength := len(payload)
+	totalLength := totalByteLength(headerLength, payloadLength)
+
+	buf := new(bytes.Buffer)
+	binary.Write(buf, binary.BigEndian, uint32(totalLength))
+	binary.Write(buf, binary.BigEndian, uint32(headerLength))
+	prelude := buf.Bytes()
+	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(prelude))
+	buf.Write(header)
+	if payload != nil {
+		buf.Write(payload)
+	}
+	message := buf.Bytes()
+	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(message))
+
+	return buf.Bytes()
+}
+
+// Refer genRecordsHeader().
+var recordsHeader = []byte{
+	13, ':', 'm', 'e', 's', 's', 'a', 'g', 'e', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'e', 'v', 'e', 'n', 't',
+	13, ':', 'c', 'o', 'n', 't', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 24, 'a', 'p', 'p', 'l', 'i', 'c', 'a', 't', 'i', 'o', 'n', '/', 'o', 'c', 't', 'e', 't', '-', 's', 't', 'r', 'e', 'a', 'm',
+	11, ':', 'e', 'v', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 7, 'R', 'e', 'c', 'o', 'r', 'd', 's',
+}
+
+// newRecordsMessage - creates new Records Message which can contain a single record, partial records,
+// or multiple records. Depending on the size of the result, a response can contain one or more of these messages.
+//
+// Header specification
+// Records messages contain three headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-record.png
+//
+// Payload specification
+// Records message payloads can contain a single record, partial records, or multiple records.
+func newRecordsMessage(payload []byte) []byte {
+	return genMessage(recordsHeader, payload)
+}
+
+// continuationMessage - S3 periodically sends this message to keep the TCP connection open.
+// These messages appear in responses at random. The client must detect the message type and process accordingly.
+//
+// Header specification:
+// Continuation messages contain two headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-cont.png
+//
+// Payload specification:
+// Continuation messages have no payload.
+var continuationMessage = []byte{
+	0, 0, 0, 57, // total byte-length.
+	0, 0, 0, 41, // headers byte-length.
+	139, 161, 157, 242, // prelude crc.
+	13, ':', 'm', 'e', 's', 's', 'a', 'g', 'e', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'e', 'v', 'e', 'n', 't', // headers.
+	11, ':', 'e', 'v', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 4, 'C', 'o', 'n', 't', // headers.
+	156, 134, 74, 13, // message crc.
+}
+
+// Refer genProgressHeader().
+var progressHeader = []byte{
+	13, ':', 'm', 'e', 's', 's', 'a', 'g', 'e', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'e', 'v', 'e', 'n', 't',
+	13, ':', 'c', 'o', 'n', 't', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 8, 't', 'e', 'x', 't', '/', 'x', 'm', 'l',
+	11, ':', 'e', 'v', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 8, 'P', 'r', 'o', 'g', 'r', 'e', 's', 's',
+}
+
+// newProgressMessage - creates new Progress Message. S3 periodically sends this message, if requested.
+// It contains information about the progress of a query that has started but has not yet completed.
+//
+// Header specification:
+// Progress messages contain three headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-progress.png
+//
+// Payload specification:
+// Progress message payload is an XML document containing information about the progress of a request.
+//   * BytesScanned => Number of bytes that have been processed before being uncompressed (if the file is compressed).
+//   * BytesProcessed => Number of bytes that have been processed after being uncompressed (if the file is compressed).
+//   * BytesReturned => Current number of bytes of records payload data returned by S3.
+//
+// For uncompressed files, BytesScanned and BytesProcessed are equal.
+//
+// Example:
+//
+// <?xml version="1.0" encoding="UTF-8"?>
+// <Progress>
+//   <BytesScanned>512</BytesScanned>
+//   <BytesProcessed>1024</BytesProcessed>
+//   <BytesReturned>1024</BytesReturned>
+// </Progress>
+//
+func newProgressMessage(bytesScanned, bytesProcessed, bytesReturned int64) []byte {
+	payload := []byte(`<?xml version="1.0" encoding="UTF-8"?><Progress><BytesScanned>` +
+		strconv.FormatInt(bytesScanned, 10) + `</BytesScanned><BytesProcessed>` +
+		strconv.FormatInt(bytesProcessed, 10) + `</BytesProcessed><BytesReturned>` +
+		strconv.FormatInt(bytesReturned, 10) + `</BytesReturned></Stats>`)
+	return genMessage(progressHeader, payload)
+}
+
+// Refer genStatsHeader().
+var statsHeader = []byte{
+	13, ':', 'm', 'e', 's', 's', 'a', 'g', 'e', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'e', 'v', 'e', 'n', 't',
+	13, ':', 'c', 'o', 'n', 't', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 8, 't', 'e', 'x', 't', '/', 'x', 'm', 'l',
+	11, ':', 'e', 'v', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'S', 't', 'a', 't', 's',
+}
+
+// newStatsMessage - creates new Stats Message. S3 sends this message at the end of the request.
+// It contains statistics about the query.
+//
+// Header specification:
+// Stats messages contain three headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-stats.png
+//
+// Payload specification:
+// Stats message payload is an XML document containing information about a request's stats when processing is complete.
+//   * BytesScanned => Number of bytes that have been processed before being uncompressed (if the file is compressed).
+//   * BytesProcessed => Number of bytes that have been processed after being uncompressed (if the file is compressed).
+//   * BytesReturned => Total number of bytes of records payload data returned by S3.
+//
+// For uncompressed files, BytesScanned and BytesProcessed are equal.
+//
+// Example:
+//
+// <?xml version="1.0" encoding="UTF-8"?>
+// <Stats>
+//      <BytesScanned>512</BytesScanned>
+//      <BytesProcessed>1024</BytesProcessed>
+//      <BytesReturned>1024</BytesReturned>
+// </Stats>
+func newStatsMessage(bytesScanned, bytesProcessed, bytesReturned int64) []byte {
+	payload := []byte(`<?xml version="1.0" encoding="UTF-8"?><Stats><BytesScanned>` +
+		strconv.FormatInt(bytesScanned, 10) + `</BytesScanned><BytesProcessed>` +
+		strconv.FormatInt(bytesProcessed, 10) + `</BytesProcessed><BytesReturned>` +
+		strconv.FormatInt(bytesReturned, 10) + `</BytesReturned></Stats>`)
+	return genMessage(statsHeader, payload)
+}
+
+// endMessage - indicates that the request is complete, and no more messages will be sent.
+// You should not assume that the request is complete until the client receives an End message.
+//
+// Header specification:
+// End messages contain two headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-end.png
+//
+// Payload specification:
+// End messages have no payload.
+var endMessage = []byte{
+	0, 0, 0, 56, // total byte-length.
+	0, 0, 0, 40, // headers byte-length.
+	193, 198, 132, 212, // prelude crc.
+	13, ':', 'm', 'e', 's', 's', 'a', 'g', 'e', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'e', 'v', 'e', 'n', 't', // headers.
+	11, ':', 'e', 'v', 'e', 'n', 't', '-', 't', 'y', 'p', 'e', 7, 0, 3, 'E', 'n', 'd', // headers.
+	207, 151, 211, 146, // message crc.
+}
+
+// newErrorMessage - creates new Request Level Error Message. S3 sends this message if the request failed for any reason.
+// It contains the error code and error message for the failure. If S3 sends a RequestLevelError message,
+// it doesn't send an End message.
+//
+// Header specification:
+// Request-level error messages contain three headers, as follows:
+// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-error.png
+//
+// Payload specification:
+// Request-level error messages have no payload.
+func newErrorMessage(errorCode, errorMessage []byte) []byte {
+	buf := new(bytes.Buffer)
+
+	buf.Write([]byte{13, ':', 'm', 'e', 's', 's', 'a', 'g', 'e', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'e', 'r', 'r', 'o', 'r'})
+
+	buf.Write([]byte{14, ':', 'e', 'r', 'r', 'o', 'r', '-', 'm', 'e', 's', 's', 'a', 'g', 'e', 7})
+	binary.Write(buf, binary.BigEndian, uint16(len(errorMessage)))
+	buf.Write(errorMessage)
+
+	buf.Write([]byte{11, ':', 'e', 'r', 'r', 'o', 'r', '-', 'c', 'o', 'd', 'e', 7})
+	binary.Write(buf, binary.BigEndian, uint16(len(errorCode)))
+	buf.Write(errorCode)
+
+	return genMessage(buf.Bytes(), nil)
+}
+
+// NewErrorMessage - creates new Request Level Error Message specified in
+// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html.
+func NewErrorMessage(errorCode, errorMessage string) []byte {
+	return newErrorMessage([]byte(errorCode), []byte(errorMessage))
+}
+
+type messageWriter struct {
+	writer          http.ResponseWriter
+	getProgressFunc func() (int64, int64)
+	bytesReturned   int64
+
+	dataCh  chan []byte
+	doneCh  chan struct{}
+	closeCh chan struct{}
+	stopped uint32
+	closed  uint32
+}
+
+func (writer *messageWriter) write(data []byte) bool {
+	if _, err := writer.writer.Write(data); err != nil {
+		return false
+	}
+
+	writer.writer.(http.Flusher).Flush()
+	return true
+}
+
+func (writer *messageWriter) start() {
+	keepAliveTicker := time.NewTicker(1 * time.Second)
+	var progressTicker *time.Ticker
+	if writer.getProgressFunc != nil {
+		progressTicker = time.NewTicker(1 * time.Minute)
+	}
+
+	go func() {
+		quitFlag := 0
+		for quitFlag == 0 {
+			if progressTicker == nil {
+				select {
+				case data, ok := <-writer.dataCh:
+					if !ok {
+						quitFlag = 1
+						break
+					}
+					if !writer.write(data) {
+						quitFlag = 1
+					}
+				case <-writer.doneCh:
+					quitFlag = 2
+				case <-keepAliveTicker.C:
+					if !writer.write(continuationMessage) {
+						quitFlag = 1
+					}
+				}
+			} else {
+				select {
+				case data, ok := <-writer.dataCh:
+					if !ok {
+						quitFlag = 1
+						break
+					}
+					if !writer.write(data) {
+						quitFlag = 1
+					}
+				case <-writer.doneCh:
+					quitFlag = 2
+				case <-keepAliveTicker.C:
+					if !writer.write(continuationMessage) {
+						quitFlag = 1
+					}
+				case <-progressTicker.C:
+					bytesScanned, bytesProcessed := writer.getProgressFunc()
+					bytesReturned := atomic.LoadInt64(&writer.bytesReturned)
+					if !writer.write(newProgressMessage(bytesScanned, bytesProcessed, bytesReturned)) {
+						quitFlag = 1
+					}
+				}
+			}
+		}
+
+		atomic.StoreUint32(&writer.stopped, 1)
+		close(writer.closeCh)
+
+		keepAliveTicker.Stop()
+		if progressTicker != nil {
+			progressTicker.Stop()
+		}
+
+		if quitFlag == 2 {
+			for data := range writer.dataCh {
+				if _, err := writer.writer.Write(data); err != nil {
+					break
+				}
+			}
+		}
+	}()
+}
+
+func (writer *messageWriter) close() {
+	if atomic.SwapUint32(&writer.closed, 1) == 0 {
+		close(writer.doneCh)
+		for range writer.closeCh {
+			close(writer.dataCh)
+		}
+	}
+}
+
+func (writer *messageWriter) send(data []byte) error {
+	err := func() error {
+		if atomic.LoadUint32(&writer.stopped) == 1 {
+			return fmt.Errorf("writer already closed")
+		}
+
+		select {
+		case writer.dataCh <- data:
+		case <-writer.doneCh:
+			return fmt.Errorf("closed writer")
+		}
+
+		return nil
+	}()
+
+	if err != nil {
+		writer.close()
+	}
+
+	return err
+}
+
+func (writer *messageWriter) SendRecords(payload []byte) error {
+	err := writer.send(newRecordsMessage(payload))
+	if err == nil {
+		atomic.AddInt64(&writer.bytesReturned, int64(len(payload)))
+	}
+	return err
+}
+
+func (writer *messageWriter) SendStats(bytesScanned, bytesProcessed int64) error {
+	bytesReturned := atomic.LoadInt64(&writer.bytesReturned)
+	err := writer.send(newStatsMessage(bytesScanned, bytesProcessed, bytesReturned))
+	if err != nil {
+		return err
+	}
+
+	err = writer.send(endMessage)
+	writer.close()
+	return err
+}
+
+func (writer *messageWriter) SendError(errorCode, errorMessage string) error {
+	err := writer.send(newErrorMessage([]byte(errorCode), []byte(errorMessage)))
+	if err == nil {
+		writer.close()
+	}
+	return err
+}
+
+func newMessageWriter(w http.ResponseWriter, getProgressFunc func() (bytesScanned, bytesProcessed int64)) *messageWriter {
+	writer := &messageWriter{
+		writer:          w,
+		getProgressFunc: getProgressFunc,
+
+		dataCh:  make(chan []byte),
+		doneCh:  make(chan struct{}),
+		closeCh: make(chan struct{}),
+	}
+	writer.start()
+	return writer
+}

pkg/s3select/output.go

@@ -1,460 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-// DO NOT EDIT THIS PACKAGE DIRECTLY: This follows the protocol defined by
-// AmazonS3 found at
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-// Consult the Spec before making direct edits.
-
-package s3select
-
-import (
-	"bytes"
-	"encoding/binary"
-	"hash/crc32"
-)
-
-// Record Headers
-// -11 -event type - 7 - 7 "Records"
-// -13 -content-type -7 -24 "application/octet-stream"
-// -13 -message-type -7 5 "event"
-// This is predefined from AMZ protocol found here:
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-var recordHeaders []byte
-
-// End Headers
-// -13 -message-type -7 -5 "event"
-// -11 -:event-type -7  -3 "End"
-// This is predefined from AMZ protocol found here:
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-var endHeaders []byte
-
-// Continuation Headers
-// -13 -message-type -7 -5 "event"
-// -11 -:event-type -7  -4 "Cont"
-// This is predefined from AMZ protocol found here:
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-var contHeaders []byte
-
-// Stat Headers
-// -11 -event type - 7 - 5 "Stat" -20
-// -13 -content-type -7 -8 "text/xml" -25
-// -13 -message-type -7 -5 "event"     -22
-// This is predefined from AMZ protocol found here:
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-var statHeaders []byte
-
-// Progress Headers
-// -11 -event type - 7 - 8 "Progress" -23
-// -13 -content-type -7 -8 "text/xml" -25
-// -13 -message-type -7 -5 "event"     -22
-// This is predefined from AMZ protocol found here:
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-var progressHeaders []byte
-
-// The length of the nonvariable portion of the ErrHeaders
-// The below are the specifications of the header for a "error" event
-// -11 -error-code - 7 - DEFINED "DEFINED"
-// -14 -error-message -7 -DEFINED "DEFINED"
-// -13 -message-type -7 -5 "error"
-// This is predefined from AMZ protocol found here:
-// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-var errHdrLen int
-
-func init() {
-	recordHeaders = writeRecordHeader()
-	endHeaders = writeEndHeader()
-	contHeaders = writeContHeader()
-	statHeaders = writeStatHeader()
-	progressHeaders = writeProgressHeader()
-	errHdrLen = 55
-
-}
-
-// encodeString encodes a string in a []byte, lenBytes is the number of bytes
-// used to encode the length of the string.
-func encodeHeaderStringValue(s string) []byte {
-	n := uint16(len(s))
-	lenSlice := make([]byte, 2)
-	binary.BigEndian.PutUint16(lenSlice[0:], n)
-	return append(lenSlice, []byte(s)...)
-}
-func encodeHeaderStringName(s string) []byte {
-	lenSlice := make([]byte, 1)
-	lenSlice[0] = byte(len(s))
-	return append(lenSlice, []byte(s)...)
-}
-
-// encodeNumber encodes a number in a []byte, lenBytes is the number of bytes
-// used to encode the length of the string.
-func encodeNumber(n byte, lenBytes int) []byte {
-	lenSlice := make([]byte, lenBytes)
-	lenSlice[0] = n
-	return lenSlice
-}
-
-// writePayloadSize writes the 4byte payload size portion of the protocol.
-func writePayloadSize(payloadSize int, headerLength int) []byte {
-	totalByteLen := make([]byte, 4)
-	totalMsgLen := uint32(payloadSize + headerLength + 16)
-	binary.BigEndian.PutUint32(totalByteLen, totalMsgLen)
-	return totalByteLen
-}
-
-// writeHeaderSize writes the 4byte header size portion of the protocol.
-func writeHeaderSize(headerLength int) []byte {
-	totalHeaderLen := make([]byte, 4)
-	totalLen := uint32(headerLength)
-	binary.BigEndian.PutUint32(totalHeaderLen, totalLen)
-	return totalHeaderLen
-}
-
-//  writeCRC writes the CRC for both the prelude and and the end of the protocol.
-func writeCRC(buffer []byte) []byte {
-	// Calculate the  CRC here:
-	crc := make([]byte, 4)
-	cksum := crc32.ChecksumIEEE(buffer)
-	binary.BigEndian.PutUint32(crc, cksum)
-	return crc
-}
-
-// writePayload writes the Payload for those protocols which the Payload is
-// necessary.
-func writePayload(myPayload string) []byte {
-	convertedPayload := []byte(myPayload)
-	payloadStore := make([]byte, len(convertedPayload))
-	copy(payloadStore[0:], myPayload)
-	return payloadStore
-}
-
-// writeRecordHeader is a function which writes the headers for the continuation
-// Message
-func writeRecordHeader() []byte {
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	var currentMessage = &bytes.Buffer{}
-	// 11 -event type - 7 - 7 "Records"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":event-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("Records"))
-	// Creation of the Header for Content-Type 	// 13 -content-type -7 -24
-	// "application/octet-stream"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":content-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("application/octet-stream"))
-	// Creation of the Header for message-type 13 -message-type -7 5 "event"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":message-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("event"))
-	return currentMessage.Bytes()
-}
-
-// writeEndHeader is a function which writes the headers for the continuation
-// Message
-func writeEndHeader() []byte {
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	var currentMessage = &bytes.Buffer{}
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":event-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("End"))
-
-	// Creation of the Header for message-type 13 -message-type -7 5 "event"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":message-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("event"))
-	return currentMessage.Bytes()
-}
-
-// writeContHeader is a function which writes the headers for the continuation
-// Message
-func writeContHeader() []byte {
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	var currentMessage = &bytes.Buffer{}
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":event-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("Cont"))
-
-	// Creation of the Header for message-type 13 -message-type -7 5 "event"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":message-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("event"))
-	return currentMessage.Bytes()
-
-}
-
-// writeStatHeader is a function which writes the headers for the Stat
-// Message
-func writeStatHeader() []byte {
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	var currentMessage = &bytes.Buffer{}
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":event-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("Stats"))
-	// Creation of the Header for Content-Type 	// 13 -content-type -7 -8
-	// "text/xml"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":content-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("text/xml"))
-
-	// Creation of the Header for message-type 13 -message-type -7 5 "event"
-	currentMessage.Write(encodeHeaderStringName(":message-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("event"))
-	return currentMessage.Bytes()
-
-}
-
-// writeProgressHeader is a function which writes the headers for the Progress
-// Message
-func writeProgressHeader() []byte {
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	var currentMessage = &bytes.Buffer{}
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":event-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("Progress"))
-	// Creation of the Header for Content-Type 	// 13 -content-type -7 -8
-	// "text/xml"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":content-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("text/xml"))
-
-	// Creation of the Header for message-type 13 -message-type -7 5 "event"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":message-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("event"))
-	return currentMessage.Bytes()
-
-}
-
-// writeRecordMessage is the function which constructs the binary message for a
-// record message to be sent.
-func writeRecordMessage(payload string, currentMessage *bytes.Buffer) *bytes.Buffer {
-	// The below are the specifications of the header for a "record" event
-	// 11 -event type - 7 - 7 "Records"
-	// 13 -content-type -7 -24 "application/octet-stream"
-	// 13 -message-type -7 5 "event"
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	headerLen := len(recordHeaders)
-	// Writes the total size of the message.
-	currentMessage.Write(writePayloadSize(len(payload), headerLen))
-	// Writes the total size of the header.
-	currentMessage.Write(writeHeaderSize(headerLen))
-	// Writes the CRC of the Prelude
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	currentMessage.Write(recordHeaders)
-
-	// This part is where the payload is written, this will be only one row, since
-	// we're sending one message at a types
-	currentMessage.Write(writePayload(payload))
-
-	// Now we do a CRC check on the entire messages
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	return currentMessage
-
-}
-
-// writeContinuationMessage is the function which constructs the binary message
-// for a continuation message to be sent.
-func writeContinuationMessage(currentMessage *bytes.Buffer) *bytes.Buffer {
-	// 11 -event type - 7 - 4 "Cont"
-	// 13 -message-type -7 5 "event"
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	headerLen := len(contHeaders)
-	currentMessage.Write(writePayloadSize(0, headerLen))
-
-	currentMessage.Write(writeHeaderSize(headerLen))
-
-	// Calculate the Prelude CRC here:
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-
-	currentMessage.Write(contHeaders)
-
-	//Now we do a CRC check on the entire messages
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	return currentMessage
-
-}
-
-// writeEndMessage is the function which constructs the binary message
-// for a end message to be sent.
-func writeEndMessage(currentMessage *bytes.Buffer) *bytes.Buffer {
-	// 11 -event type - 7 - 3 "End"
-	// 13 -message-type -7 5 "event"
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	headerLen := len(endHeaders)
-	currentMessage.Write(writePayloadSize(0, headerLen))
-
-	currentMessage.Write(writeHeaderSize(headerLen))
-
-	//Calculate the Prelude CRC here:
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-
-	currentMessage.Write(endHeaders)
-
-	// Now we do a CRC check on the entire messages
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	return currentMessage
-
-}
-
-// writeStateMessage is the function which constructs the binary message for a
-// state message to be sent.
-func writeStatMessage(payload string, currentMessage *bytes.Buffer) *bytes.Buffer {
-	// 11 -event type - 7 - 5 "Stat" 20
-	// 13 -content-type -7 -8 "text/xml" 25
-	// 13 -message-type -7 5 "event"     22
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	headerLen := len(statHeaders)
-
-	currentMessage.Write(writePayloadSize(len(payload), headerLen))
-
-	currentMessage.Write(writeHeaderSize(headerLen))
-
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-
-	currentMessage.Write(statHeaders)
-
-	// This part is where the payload is written, this will be only one row, since
-	// we're sending one message at a types
-	currentMessage.Write(writePayload(payload))
-
-	// Now we do a CRC check on the entire messages
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	return currentMessage
-
-}
-
-// writeProgressMessage is the function which constructs the binary message for
-// a progress message to be sent.
-func writeProgressMessage(payload string, currentMessage *bytes.Buffer) *bytes.Buffer {
-	// The below are the specifications of the header for a "Progress" event
-	// 11 -event type - 7 - 8 "Progress" 23
-	// 13 -content-type -7 -8 "text/xml" 25
-	// 13 -message-type -7 5 "event"     22
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	headerLen := len(progressHeaders)
-
-	currentMessage.Write(writePayloadSize(len(payload), headerLen))
-
-	currentMessage.Write(writeHeaderSize(headerLen))
-
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-
-	currentMessage.Write(progressHeaders)
-
-	// This part is where the payload is written, this will be only one row, since
-	// we're sending one message at a types
-	currentMessage.Write(writePayload(payload))
-
-	// Now we do a CRC check on the entire messages
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	return currentMessage
-
-}
-
-// writeErrorMessage is the function which constructs the binary message for a
-// error message to be sent.
-func writeErrorMessage(errorMessage error, currentMessage *bytes.Buffer) *bytes.Buffer {
-
-	// The below are the specifications of the header for a "error" event
-	// 11 -error-code - 7 - DEFINED "DEFINED"
-	// 14 -error-message -7 -DEFINED "DEFINED"
-	// 13 -message-type -7 5 "error"
-	// This is predefined from AMZ protocol found here:
-	// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html
-	sizeOfErrorCode := len(errorCodeResponse[errorMessage])
-	sizeOfErrorMessage := len(errorMessage.Error())
-	headerLen := errHdrLen + sizeOfErrorCode + sizeOfErrorMessage
-
-	currentMessage.Write(writePayloadSize(0, headerLen))
-
-	currentMessage.Write(writeHeaderSize(headerLen))
-
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":error-code"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue(errorCodeResponse[errorMessage]))
-
-	//  14 -error-message -7 -DEFINED "DEFINED"
-
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":error-message"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue(errorMessage.Error()))
-	// Creation of the Header for message-type 13 -message-type -7 5 "error"
-	// header name
-	currentMessage.Write(encodeHeaderStringName(":message-type"))
-	// header type
-	currentMessage.Write(encodeNumber(7, 1))
-	// header value and header value length
-	currentMessage.Write(encodeHeaderStringValue("error"))
-
-	// Now we do a CRC check on the entire messages
-	currentMessage.Write(writeCRC(currentMessage.Bytes()))
-	return currentMessage
-
-}

pkg/s3select/parquet/args.go

@@ -0,0 +1,42 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+import "encoding/xml"
+
+// ReaderArgs - represents elements inside <InputSerialization><Parquet/> in request XML.
+type ReaderArgs struct {
+	unmarshaled bool
+}
+
+// IsEmpty - returns whether reader args is empty or not.
+func (args *ReaderArgs) IsEmpty() bool {
+	return !args.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (args *ReaderArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subReaderArgs ReaderArgs
+	parsedArgs := subReaderArgs{}
+	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
+		return err
+	}
+
+	args.unmarshaled = true
+	return nil
+}

pkg/s3select/parquet/errors.go

@@ -0,0 +1,53 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+type s3Error struct {
+	code       string
+	message    string
+	statusCode int
+	cause      error
+}
+
+func (err *s3Error) Cause() error {
+	return err.cause
+}
+
+func (err *s3Error) ErrorCode() string {
+	return err.code
+}
+
+func (err *s3Error) ErrorMessage() string {
+	return err.message
+}
+
+func (err *s3Error) HTTPStatusCode() int {
+	return err.statusCode
+}
+
+func (err *s3Error) Error() string {
+	return err.message
+}
+
+func errParquetParsingError(err error) *s3Error {
+	return &s3Error{
+		code:       "ParquetParsingError",
+		message:    "Error parsing Parquet file. Please check the file and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}

pkg/s3select/parquet/reader.go

@@ -0,0 +1,93 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+import (
+	"io"
+
+	"github.com/minio/minio/pkg/s3select/json"
+	"github.com/minio/minio/pkg/s3select/sql"
+	parquetgo "github.com/minio/parquet-go"
+	parquetgen "github.com/minio/parquet-go/gen-go/parquet"
+)
+
+// Reader - Parquet record reader for S3Select.
+type Reader struct {
+	args *ReaderArgs
+	file *parquetgo.File
+}
+
+// Read - reads single record.
+func (r *Reader) Read() (sql.Record, error) {
+	parquetRecord, err := r.file.Read()
+	if err != nil {
+		if err != io.EOF {
+			return nil, errParquetParsingError(err)
+		}
+
+		return nil, err
+	}
+
+	record := json.NewRecord()
+	for name, v := range parquetRecord {
+		var value *sql.Value
+		switch v.Type {
+		case parquetgen.Type_BOOLEAN:
+			value = sql.NewBool(v.Value.(bool))
+		case parquetgen.Type_INT32:
+			value = sql.NewInt(int64(v.Value.(int32)))
+		case parquetgen.Type_INT64:
+			value = sql.NewInt(v.Value.(int64))
+		case parquetgen.Type_FLOAT:
+			value = sql.NewFloat(float64(v.Value.(float32)))
+		case parquetgen.Type_DOUBLE:
+			value = sql.NewFloat(v.Value.(float64))
+		case parquetgen.Type_INT96, parquetgen.Type_BYTE_ARRAY, parquetgen.Type_FIXED_LEN_BYTE_ARRAY:
+			value = sql.NewString(string(v.Value.([]byte)))
+		default:
+			return nil, errParquetParsingError(nil)
+		}
+
+		if err = record.Set(name, value); err != nil {
+			return nil, errParquetParsingError(err)
+		}
+	}
+
+	return record, nil
+}
+
+// Close - closes underlaying readers.
+func (r *Reader) Close() error {
+	return r.file.Close()
+}
+
+// NewReader - creates new Parquet reader using readerFunc callback.
+func NewReader(getReaderFunc func(offset, length int64) (io.ReadCloser, error), args *ReaderArgs) (*Reader, error) {
+	file, err := parquetgo.Open(getReaderFunc, nil)
+	if err != nil {
+		if err != io.EOF {
+			return nil, errParquetParsingError(err)
+		}
+
+		return nil, err
+	}
+
+	return &Reader{
+		args: args,
+		file: file,
+	}, nil
+}

pkg/s3select/progress.go

@@ -0,0 +1,90 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package s3select
+
+import (
+	"compress/bzip2"
+	"fmt"
+	"io"
+	"sync/atomic"
+
+	gzip "github.com/klauspost/pgzip"
+)
+
+type countUpReader struct {
+	reader    io.Reader
+	bytesRead int64
+}
+
+func (r *countUpReader) Read(p []byte) (n int, err error) {
+	n, err = r.reader.Read(p)
+	atomic.AddInt64(&r.bytesRead, int64(n))
+	return n, err
+}
+
+func (r *countUpReader) BytesRead() int64 {
+	return atomic.LoadInt64(&r.bytesRead)
+}
+
+func newCountUpReader(reader io.Reader) *countUpReader {
+	return &countUpReader{
+		reader: reader,
+	}
+}
+
+type progressReader struct {
+	rc              io.ReadCloser
+	scannedReader   *countUpReader
+	processedReader *countUpReader
+}
+
+func (pr *progressReader) Read(p []byte) (n int, err error) {
+	return pr.processedReader.Read(p)
+}
+
+func (pr *progressReader) Close() error {
+	return pr.rc.Close()
+}
+
+func (pr *progressReader) Stats() (bytesScanned, bytesProcessed int64) {
+	return pr.scannedReader.BytesRead(), pr.processedReader.BytesRead()
+}
+
+func newProgressReader(rc io.ReadCloser, compType CompressionType) (*progressReader, error) {
+	scannedReader := newCountUpReader(rc)
+	var r io.Reader
+	var err error
+
+	switch compType {
+	case noneType:
+		r = scannedReader
+	case gzipType:
+		if r, err = gzip.NewReader(scannedReader); err != nil {
+			return nil, errTruncatedInput(err)
+		}
+	case bzip2Type:
+		r = bzip2.NewReader(scannedReader)
+	default:
+		return nil, errInvalidCompressionFormat(fmt.Errorf("unknown compression type '%v'", compType))
+	}
+
+	return &progressReader{
+		rc:              rc,
+		scannedReader:   scannedReader,
+		processedReader: newCountUpReader(r),
+	}, nil
+}

pkg/s3select/select.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,436 +17,377 @@
 package s3select
 
 import (
-	"math"
-	"sort"
-	"strconv"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/http"
 	"strings"
 
-	"github.com/minio/minio/pkg/s3select/format"
-	"github.com/tidwall/gjson"
-	"github.com/xwb1989/sqlparser"
+	"github.com/minio/minio/pkg/s3select/csv"
+	"github.com/minio/minio/pkg/s3select/json"
+	"github.com/minio/minio/pkg/s3select/parquet"
+	"github.com/minio/minio/pkg/s3select/sql"
 )
 
-// SelectFuncs contains the relevant values from the parser for S3 Select
-// Functions
-type SelectFuncs struct {
-	funcExpr []*sqlparser.FuncExpr
-	index    []int
+type recordReader interface {
+	Read() (sql.Record, error)
+	Close() error
 }
 
-// RunSqlParser allows us to easily bundle all the functions from above and run
-// them in the appropriate order.
-func runSelectParser(f format.Select, rowCh chan Row) {
-	reqCols, alias, limit, wc, aggFunctionNames, fns, err := ParseSelect(f)
-	if err != nil {
-		rowCh <- Row{
-			err: err,
-		}
-		return
-	}
-	processSelectReq(reqCols, alias, wc, limit, aggFunctionNames, rowCh, fns, f)
-}
-
-// ParseSelect parses the SELECT expression, and effectively tokenizes it into
-// its separate parts. It returns the requested column names,alias,limit of
-// records, and the where clause.
-func ParseSelect(f format.Select) ([]string, string, int64, sqlparser.Expr, []string, SelectFuncs, error) {
-	var sFuncs = SelectFuncs{}
-	var whereClause sqlparser.Expr
-	var alias string
-	var limit int64
-
-	stmt, err := sqlparser.Parse(f.Expression())
-	// TODO: Maybe can parse their errors a bit to return some more of the s3 errors
-	if err != nil {
-		return nil, "", 0, nil, nil, sFuncs, ErrLexerInvalidChar
-	}
-
-	switch stmt := stmt.(type) {
-	case *sqlparser.Select:
-		// evaluates the where clause
-		fnNames := make([]string, len(stmt.SelectExprs))
-		columnNames := make([]string, len(stmt.SelectExprs))
-
-		if stmt.Where != nil {
-			whereClause = stmt.Where.Expr
-		}
-		for i, sexpr := range stmt.SelectExprs {
-			switch expr := sexpr.(type) {
-			case *sqlparser.StarExpr:
-				columnNames[0] = "*"
-			case *sqlparser.AliasedExpr:
-				switch smallerexpr := expr.Expr.(type) {
-				case *sqlparser.FuncExpr:
-					if smallerexpr.IsAggregate() {
-						fnNames[i] = smallerexpr.Name.CompliantName()
-						// Will return function name
-						// Case to deal with if we have functions and not an asterix
-						switch tempagg := smallerexpr.Exprs[0].(type) {
-						case *sqlparser.StarExpr:
-							columnNames[0] = "*"
-							if smallerexpr.Name.CompliantName() != "count" {
-								return nil, "", 0, nil, nil, sFuncs, ErrParseUnsupportedCallWithStar
-							}
-						case *sqlparser.AliasedExpr:
-							switch col := tempagg.Expr.(type) {
-							case *sqlparser.BinaryExpr:
-								return nil, "", 0, nil, nil, sFuncs, ErrParseNonUnaryAgregateFunctionCall
-							case *sqlparser.ColName:
-								columnNames[i] = col.Name.CompliantName()
-							}
-						}
-						// Case to deal with if COALESCE was used..
-					} else if supportedFunc(smallerexpr.Name.CompliantName()) {
-						if sFuncs.funcExpr == nil {
-							sFuncs.funcExpr = make([]*sqlparser.FuncExpr, len(stmt.SelectExprs))
-							sFuncs.index = make([]int, len(stmt.SelectExprs))
-						}
-						sFuncs.funcExpr[i] = smallerexpr
-						sFuncs.index[i] = i
-					} else {
-						return nil, "", 0, nil, nil, sFuncs, ErrUnsupportedSQLOperation
-					}
-				case *sqlparser.ColName:
-					columnNames[i] = smallerexpr.Name.CompliantName()
-				}
-			}
-		}
-
-		// This code retrieves the alias and makes sure it is set to the correct
-		// value, if not it sets it to the tablename
-		for _, fexpr := range stmt.From {
-			switch smallerexpr := fexpr.(type) {
-			case *sqlparser.JoinTableExpr:
-				return nil, "", 0, nil, nil, sFuncs, ErrParseMalformedJoin
-			case *sqlparser.AliasedTableExpr:
-				alias = smallerexpr.As.CompliantName()
-				if alias == "" {
-					alias = sqlparser.GetTableName(smallerexpr.Expr).CompliantName()
-				}
-			}
-		}
-		if stmt.Limit != nil {
-			switch expr := stmt.Limit.Rowcount.(type) {
-			case *sqlparser.SQLVal:
-				// The Value of how many rows we're going to limit by
-				parsedLimit, _ := strconv.Atoi(string(expr.Val[:]))
-				limit = int64(parsedLimit)
-			}
-		}
-		if stmt.GroupBy != nil {
-			return nil, "", 0, nil, nil, sFuncs, ErrParseUnsupportedLiteralsGroupBy
-		}
-		if stmt.OrderBy != nil {
-			return nil, "", 0, nil, nil, sFuncs, ErrParseUnsupportedToken
-		}
-		if err := parseErrs(columnNames, whereClause, alias, sFuncs, f); err != nil {
-			return nil, "", 0, nil, nil, sFuncs, err
-		}
-		return columnNames, alias, limit, whereClause, fnNames, sFuncs, nil
-	}
-	return nil, "", 0, nil, nil, sFuncs, nil
-}
-
-type columnKv struct {
-	Key   string
-	Value int
-}
-
-func columnsIndex(reqColNames []string, f format.Select) ([]columnKv, error) {
-	var (
-		columnsKv  []columnKv
-		columnsMap = make(map[string]int)
-		columns    = f.Header()
+const (
+	csvFormat     = "csv"
+	jsonFormat    = "json"
+	parquetFormat = "parquet"
 )
-	if f.HasHeader() {
-		err := checkForDuplicates(columns, columnsMap)
-		if format.IsInt(reqColNames[0]) {
-			err = ErrMissingHeaders
+
+// CompressionType - represents value inside <CompressionType/> in request XML.
+type CompressionType string
+
+const (
+	noneType  CompressionType = "none"
+	gzipType  CompressionType = "gzip"
+	bzip2Type CompressionType = "bzip2"
+)
+
+// UnmarshalXML - decodes XML data.
+func (c *CompressionType) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	var s string
+	if err := d.DecodeElement(&s, &start); err != nil {
+		return errMalformedXML(err)
 	}
+
+	parsedType := CompressionType(strings.ToLower(s))
+	if s == "" {
+		parsedType = noneType
+	}
+
+	switch parsedType {
+	case noneType, gzipType, bzip2Type:
+	default:
+		return errInvalidCompressionFormat(fmt.Errorf("invalid compression format '%v'", s))
+	}
+
+	*c = parsedType
+	return nil
+}
+
+// InputSerialization - represents elements inside <InputSerialization/> in request XML.
+type InputSerialization struct {
+	CompressionType CompressionType    `xml:"CompressionType"`
+	CSVArgs         csv.ReaderArgs     `xml:"CSV"`
+	JSONArgs        json.ReaderArgs    `xml:"JSON"`
+	ParquetArgs     parquet.ReaderArgs `xml:"Parquet"`
+	unmarshaled     bool
+	format          string
+}
+
+// IsEmpty - returns whether input serialization is empty or not.
+func (input *InputSerialization) IsEmpty() bool {
+	return !input.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (input *InputSerialization) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subInputSerialization InputSerialization
+	parsedInput := subInputSerialization{}
+	if err := d.DecodeElement(&parsedInput, &start); err != nil {
+		return errMalformedXML(err)
+	}
+
+	found := 0
+	if !parsedInput.CSVArgs.IsEmpty() {
+		parsedInput.format = csvFormat
+		found++
+	}
+	if !parsedInput.JSONArgs.IsEmpty() {
+		parsedInput.format = jsonFormat
+		found++
+	}
+	if !parsedInput.ParquetArgs.IsEmpty() {
+		if parsedInput.CompressionType != noneType {
+			return errInvalidRequestParameter(fmt.Errorf("CompressionType must be NONE for Parquet format"))
+		}
+
+		parsedInput.format = parquetFormat
+		found++
+	}
+
+	if found != 1 {
+		return errInvalidDataSource(nil)
+	}
+
+	*input = InputSerialization(parsedInput)
+	input.unmarshaled = true
+	return nil
+}
+
+// OutputSerialization - represents elements inside <OutputSerialization/> in request XML.
+type OutputSerialization struct {
+	CSVArgs     csv.WriterArgs  `xml:"CSV"`
+	JSONArgs    json.WriterArgs `xml:"JSON"`
+	unmarshaled bool
+	format      string
+}
+
+// IsEmpty - returns whether output serialization is empty or not.
+func (output *OutputSerialization) IsEmpty() bool {
+	return !output.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (output *OutputSerialization) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subOutputSerialization OutputSerialization
+	parsedOutput := subOutputSerialization{}
+	if err := d.DecodeElement(&parsedOutput, &start); err != nil {
+		return errMalformedXML(err)
+	}
+
+	found := 0
+	if !parsedOutput.CSVArgs.IsEmpty() {
+		parsedOutput.format = csvFormat
+		found++
+	}
+	if !parsedOutput.JSONArgs.IsEmpty() {
+		parsedOutput.format = jsonFormat
+		found++
+	}
+	if found != 1 {
+		return errObjectSerializationConflict(fmt.Errorf("either CSV or JSON should be present in OutputSerialization"))
+	}
+
+	*output = OutputSerialization(parsedOutput)
+	output.unmarshaled = true
+	return nil
+}
+
+// RequestProgress - represents elements inside <RequestProgress/> in request XML.
+type RequestProgress struct {
+	Enabled bool `xml:"Enabled"`
+}
+
+// S3Select - filters the contents on a simple structured query language (SQL) statement. It
+// represents elements inside <SelectObjectContentRequest/> in request XML specified in detail at
+// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectSELECTContent.html.
+type S3Select struct {
+	XMLName        xml.Name            `xml:"SelectObjectContentRequest"`
+	Expression     string              `xml:"Expression"`
+	ExpressionType string              `xml:"ExpressionType"`
+	Input          InputSerialization  `xml:"InputSerialization"`
+	Output         OutputSerialization `xml:"OutputSerialization"`
+	Progress       RequestProgress     `xml:"RequestProgress"`
+
+	statement      *sql.Select
+	progressReader *progressReader
+	recordReader   recordReader
+}
+
+// UnmarshalXML - decodes XML data.
+func (s3Select *S3Select) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subS3Select S3Select
+	parsedS3Select := subS3Select{}
+	if err := d.DecodeElement(&parsedS3Select, &start); err != nil {
+		if _, ok := err.(*s3Error); ok {
+			return err
+		}
+
+		return errMalformedXML(err)
+	}
+
+	parsedS3Select.ExpressionType = strings.ToLower(parsedS3Select.ExpressionType)
+	if parsedS3Select.ExpressionType != "sql" {
+		return errInvalidExpressionType(fmt.Errorf("invalid expression type '%v'", parsedS3Select.ExpressionType))
+	}
+
+	if parsedS3Select.Input.IsEmpty() {
+		return errMissingRequiredParameter(fmt.Errorf("InputSerialization must be provided"))
+	}
+
+	if parsedS3Select.Output.IsEmpty() {
+		return errMissingRequiredParameter(fmt.Errorf("OutputSerialization must be provided"))
+	}
+
+	statement, err := sql.NewSelect(parsedS3Select.Expression)
+	if err != nil {
+		return err
+	}
+
+	parsedS3Select.statement = statement
+
+	*s3Select = S3Select(parsedS3Select)
+	return nil
+}
+
+func (s3Select *S3Select) outputRecord() sql.Record {
+	switch s3Select.Output.format {
+	case csvFormat:
+		return csv.NewRecord()
+	case jsonFormat:
+		return json.NewRecord()
+	}
+
+	panic(fmt.Errorf("unknown output format '%v'", s3Select.Output.format))
+}
+
+func (s3Select *S3Select) getProgress() (bytesScanned, bytesProcessed int64) {
+	if s3Select.progressReader != nil {
+		return s3Select.progressReader.Stats()
+	}
+
+	return -1, -1
+}
+
+// Open - opens S3 object by using callback for SQL selection query.
+// Currently CSV, JSON and Apache Parquet formats are supported.
+func (s3Select *S3Select) Open(getReader func(offset, length int64) (io.ReadCloser, error)) error {
+	switch s3Select.Input.format {
+	case csvFormat:
+		rc, err := getReader(0, -1)
+		if err != nil {
+			return err
+		}
+
+		s3Select.progressReader, err = newProgressReader(rc, s3Select.Input.CompressionType)
+		if err != nil {
+			return err
+		}
+
+		s3Select.recordReader, err = csv.NewReader(s3Select.progressReader, &s3Select.Input.CSVArgs)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	case jsonFormat:
+		rc, err := getReader(0, -1)
+		if err != nil {
+			return err
+		}
+
+		s3Select.progressReader, err = newProgressReader(rc, s3Select.Input.CompressionType)
+		if err != nil {
+			return err
+		}
+
+		s3Select.recordReader = json.NewReader(s3Select.progressReader, &s3Select.Input.JSONArgs)
+		return nil
+	case parquetFormat:
+		var err error
+		s3Select.recordReader, err = parquet.NewReader(getReader, &s3Select.Input.ParquetArgs)
+		return err
+	}
+
+	panic(fmt.Errorf("unknown input format '%v'", s3Select.Input.format))
+}
+
+func (s3Select *S3Select) marshal(record sql.Record) ([]byte, error) {
+	switch s3Select.Output.format {
+	case csvFormat:
+		data, err := record.MarshalCSV([]rune(s3Select.Output.CSVArgs.FieldDelimiter)[0])
 		if err != nil {
 			return nil, err
 		}
-		for k, v := range columnsMap {
-			columnsKv = append(columnsKv, columnKv{
-				Key:   k,
-				Value: v,
-			})
-		}
-	} else {
-		for i := range columns {
-			columnsKv = append(columnsKv, columnKv{
-				Key:   "_" + strconv.Itoa(i),
-				Value: i,
-			})
-		}
-	}
-	sort.Slice(columnsKv, func(i, j int) bool {
-		return columnsKv[i].Value < columnsKv[j].Value
-	})
-	return columnsKv, nil
-}
 
-// This is the main function, It goes row by row and for records which validate
-// the where clause it currently prints the appropriate row given the requested
-// columns.
-func processSelectReq(reqColNames []string, alias string, wc sqlparser.Expr, lrecords int64, fnNames []string, rowCh chan Row, fn SelectFuncs, f format.Select) {
-	counter := -1
-	filtrCount := 0
-	functionFlag := false
-
-	// Values used to store our aggregation values.
-	aggVals := make([]float64, len(reqColNames))
-	if lrecords == 0 {
-		lrecords = math.MaxInt64
-	}
-
-	var results []string
-	var columnsKv []columnKv
-	if f.Type() == format.CSV {
-		var err error
-		columnsKv, err = columnsIndex(reqColNames, f)
+		return append(data, []byte(s3Select.Output.CSVArgs.RecordDelimiter)...), nil
+	case jsonFormat:
+		data, err := record.MarshalJSON()
 		if err != nil {
-			rowCh <- Row{
-				err: err,
+			return nil, err
 		}
-			return
+
+		return append(data, []byte(s3Select.Output.JSONArgs.RecordDelimiter)...), nil
 	}
-		results = make([]string, len(columnsKv))
+
+	panic(fmt.Errorf("unknown output format '%v'", s3Select.Output.format))
+}
+
+// Evaluate - filters and sends records read from opened reader as per select statement to http response writer.
+func (s3Select *S3Select) Evaluate(w http.ResponseWriter) {
+	getProgressFunc := s3Select.getProgress
+	if !s3Select.Progress.Enabled {
+		getProgressFunc = nil
+	}
+	writer := newMessageWriter(w, getProgressFunc)
+
+	var inputRecord sql.Record
+	var outputRecord sql.Record
+	var err error
+	var data []byte
+	sendRecord := func() bool {
+		if outputRecord == nil {
+			return true
+		}
+
+		if data, err = s3Select.marshal(outputRecord); err != nil {
+			return false
+		}
+
+		if err = writer.SendRecords(data); err != nil {
+			// FIXME: log this error.
+			err = nil
+			return false
+		}
+
+		return true
 	}
 
 	for {
-		record, err := f.Read()
+		if inputRecord, err = s3Select.recordReader.Read(); err != nil {
+			if err != io.EOF {
+				break
+			}
+
+			if s3Select.statement.IsAggregated() {
+				outputRecord = s3Select.outputRecord()
+				if err = s3Select.statement.AggregateResult(outputRecord); err != nil {
+					break
+				}
+
+				if !sendRecord() {
+					break
+				}
+			}
+
+			if err = writer.SendStats(s3Select.getProgress()); err != nil {
+				// FIXME: log this error.
+				err = nil
+			}
+
+			break
+		}
+
+		outputRecord = s3Select.outputRecord()
+		if outputRecord, err = s3Select.statement.Eval(inputRecord, outputRecord); err != nil {
+			break
+		}
+
+		if !s3Select.statement.IsAggregated() {
+			if !sendRecord() {
+				break
+			}
+		}
+	}
+
 	if err != nil {
-			rowCh <- Row{
-				err: err,
+		if serr := writer.SendError("InternalError", err.Error()); serr != nil {
+			// FIXME: log errors.
 		}
-			return
-		}
-		if record == nil {
-			if functionFlag {
-				rowCh <- Row{
-					record: aggFuncToStr(aggVals, f) + "\n",
-				}
-			}
-			close(rowCh)
-			return
-		}
-
-		// For JSON multi-line input type columns needs
-		// to be handled for each record.
-		if f.Type() == format.JSON {
-			columnsKv, err = columnsIndex(reqColNames, f)
-			if err != nil {
-				rowCh <- Row{
-					err: err,
-				}
-				return
-			}
-			results = make([]string, len(columnsKv))
-		}
-
-		f.UpdateBytesProcessed(int64(len(record)))
-
-		// Return in case the number of record reaches the LIMIT
-		// defined in select query
-		if int64(filtrCount) == lrecords {
-			close(rowCh)
-			return
-		}
-
-		// The call to the where function clause, ensures that
-		// the rows we print match our where clause.
-		condition, err := matchesMyWhereClause(record, alias, wc)
-		if err != nil {
-			rowCh <- Row{
-				err: err,
-			}
-			return
-		}
-
-		if condition {
-			// if its an asterix we just print everything in the row
-			if reqColNames[0] == "*" && fnNames[0] == "" {
-				switch f.OutputType() {
-				case format.CSV:
-					for i, kv := range columnsKv {
-						results[i] = gjson.GetBytes(record, kv.Key).String()
-					}
-					rowCh <- Row{
-						record: strings.Join(results, f.OutputFieldDelimiter()) + f.OutputRecordDelimiter(),
-					}
-				case format.JSON:
-					rowCh <- Row{
-						record: string(record) + f.OutputRecordDelimiter(),
-					}
-				}
-			} else if alias != "" {
-				// This is for dealing with the case of if we have to deal with a
-				// request for a column with an index e.g A_1.
-				if format.IsInt(reqColNames[0]) {
-					// This checks whether any aggregation function was called as now we
-					// no longer will go through printing each row, and only print at the end
-					if len(fnNames) > 0 && fnNames[0] != "" {
-						functionFlag = true
-						aggregationFns(counter, filtrCount, aggVals, reqColNames, fnNames, record)
-					} else {
-						// The code below finds the appropriate columns of the row given the
-						// indicies provided in the SQL request.
-						var rowStr string
-						rowStr, err = processColNameIndex(record, reqColNames, f)
-						if err != nil {
-							rowCh <- Row{
-								err: err,
-							}
-							return
-						}
-						rowCh <- Row{
-							record: rowStr + "\n",
-						}
-					}
-				} else {
-					// This code does aggregation if we were provided column names in the
-					// form of actual names rather an indices.
-					if len(fnNames) > 0 && fnNames[0] != "" {
-						functionFlag = true
-						aggregationFns(counter, filtrCount, aggVals, reqColNames, fnNames, record)
-					} else {
-						// This code prints the appropriate part of the row given the filter
-						// and select request, if the select request was based on column
-						// names rather than indices.
-						var rowStr string
-						rowStr, err = processColNameLiteral(record, reqColNames, fn, f)
-						if err != nil {
-							rowCh <- Row{
-								err: err,
-							}
-							return
-						}
-						rowCh <- Row{
-							record: rowStr + "\n",
-						}
-					}
-				}
-			}
-			filtrCount++
-		}
-		counter++
 	}
 }
 
-// processColumnNames is a function which allows for cleaning of column names.
-func processColumnNames(reqColNames []string, alias string, f format.Select) error {
-	switch f.Type() {
-	case format.CSV:
-		for i := range reqColNames {
-			// The code below basically cleans the column name of its alias and other
-			// syntax, so that we can extract its pure name.
-			reqColNames[i] = cleanCol(reqColNames[i], alias)
-		}
-	case format.JSON:
-		// JSON doesnt have columns so no cleaning required
+// Close - closes opened S3 object.
+func (s3Select *S3Select) Close() error {
+	return s3Select.recordReader.Close()
 }
 
-	return nil
+// NewS3Select - creates new S3Select by given request XML reader.
+func NewS3Select(r io.Reader) (*S3Select, error) {
+	s3Select := &S3Select{}
+	if err := xml.NewDecoder(r).Decode(s3Select); err != nil {
+		return nil, err
 	}
 
-// processColNameIndex is the function which creates the row for an index based query.
-func processColNameIndex(record []byte, reqColNames []string, f format.Select) (string, error) {
-	var row []string
-	for _, colName := range reqColNames {
-		// COALESCE AND NULLIF do not support index based access.
-		if reqColNames[0] == "0" {
-			return "", format.ErrInvalidColumnIndex
-		}
-		cindex, err := strconv.Atoi(colName)
-		if err != nil {
-			return "", ErrMissingHeaders
-		}
-		if cindex > len(f.Header()) {
-			return "", format.ErrInvalidColumnIndex
-		}
-
-		// Subtract 1 because SELECT indexing is not 0 based, it
-		// starts at 1 generating the key like "_1".
-		row = append(row, gjson.GetBytes(record, string("_"+strconv.Itoa(cindex-1))).String())
-	}
-	rowStr := strings.Join(row, f.OutputFieldDelimiter())
-	if len(rowStr) > MaxCharsPerRecord {
-		return "", ErrOverMaxRecordSize
-	}
-	return rowStr, nil
-}
-
-// processColNameLiteral is the function which creates the row for an name based query.
-func processColNameLiteral(record []byte, reqColNames []string, fn SelectFuncs, f format.Select) (string, error) {
-	row := make([]string, len(reqColNames))
-	for i, colName := range reqColNames {
-		// this is the case to deal with COALESCE.
-		if colName == "" && isValidFunc(fn.index, i) {
-			row[i] = evaluateFuncExpr(fn.funcExpr[i], "", record)
-			continue
-		}
-		row[i] = gjson.GetBytes(record, colName).String()
-	}
-	rowStr := strings.Join(row, f.OutputFieldDelimiter())
-	if len(rowStr) > MaxCharsPerRecord {
-		return "", ErrOverMaxRecordSize
-	}
-	return rowStr, nil
-}
-
-// aggregationFns is a function which performs the actual aggregation
-// methods on the given row, it uses an array defined in the main parsing
-// function to keep track of values.
-func aggregationFns(counter int, filtrCount int, aggVals []float64, storeReqCols []string, storeFns []string, record []byte) error {
-	for i, storeFn := range storeFns {
-		switch storeFn {
-		case "":
-			continue
-		case "count":
-			aggVals[i]++
-		default:
-			// Column names are provided as an index it'll use
-			// this if statement instead.
-			var convAggFloat float64
-			if format.IsInt(storeReqCols[i]) {
-				index, _ := strconv.Atoi(storeReqCols[i])
-				convAggFloat = gjson.GetBytes(record, "_"+strconv.Itoa(index)).Float()
-			} else {
-				// Named columns rather than indices.
-				convAggFloat = gjson.GetBytes(record, storeReqCols[i]).Float()
-			}
-			switch storeFn {
-			case "min":
-				if counter == -1 {
-					aggVals[i] = math.MaxFloat64
-				}
-				if convAggFloat < aggVals[i] {
-					aggVals[i] = convAggFloat
-				}
-			case "max":
-				// Calculate the max.
-				if counter == -1 {
-					aggVals[i] = math.SmallestNonzeroFloat64
-				}
-				if convAggFloat > aggVals[i] {
-					aggVals[i] = convAggFloat
-				}
-			case "sum":
-				// Calculate the sum.
-				aggVals[i] += convAggFloat
-			case "avg":
-				// Calculating the average.
-				if filtrCount == 0 {
-					aggVals[i] = convAggFloat
-				} else {
-					aggVals[i] = (convAggFloat + (aggVals[i] * float64(filtrCount))) / float64((filtrCount + 1))
-				}
-			default:
-				return ErrParseNonUnaryAgregateFunctionCall
-			}
-		}
-	}
-	return nil
+	return s3Select, nil
 }

pkg/s3select/select_benchmark_test.go

@@ -0,0 +1,170 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package s3select
+
+import (
+	"bytes"
+	"encoding/csv"
+	"io"
+	"io/ioutil"
+	"math/rand"
+	"net/http"
+	"strconv"
+	"testing"
+	"time"
+
+	humanize "github.com/dustin/go-humanize"
+)
+
+var randSrc = rand.New(rand.NewSource(time.Now().UnixNano()))
+
+const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+
+func newRandString(length int) string {
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[randSrc.Intn(len(charset))]
+	}
+	return string(b)
+}
+
+func genSampleCSVData(count int) []byte {
+	buf := &bytes.Buffer{}
+	csvWriter := csv.NewWriter(buf)
+	csvWriter.Write([]string{"id", "name", "age", "city"})
+
+	for i := 0; i < count; i++ {
+		csvWriter.Write([]string{
+			strconv.Itoa(i),
+			newRandString(10),
+			newRandString(5),
+			newRandString(10),
+		})
+	}
+
+	csvWriter.Flush()
+	return buf.Bytes()
+}
+
+type nullResponseWriter struct {
+}
+
+func (w *nullResponseWriter) Header() http.Header {
+	return nil
+}
+
+func (w *nullResponseWriter) Write(p []byte) (int, error) {
+	return len(p), nil
+}
+
+func (w *nullResponseWriter) WriteHeader(statusCode int) {
+}
+
+func (w *nullResponseWriter) Flush() {
+}
+
+func benchmarkSelect(b *testing.B, count int, query string) {
+	var requestXML = []byte(`
+<?xml version="1.0" encoding="UTF-8"?>
+<SelectObjectContentRequest>
+    <Expression>` + query + `</Expression>
+    <ExpressionType>SQL</ExpressionType>
+    <InputSerialization>
+        <CompressionType>NONE</CompressionType>
+        <CSV>
+            <FileHeaderInfo>USE</FileHeaderInfo>
+        </CSV>
+    </InputSerialization>
+    <OutputSerialization>
+        <CSV>
+        </CSV>
+    </OutputSerialization>
+    <RequestProgress>
+        <Enabled>FALSE</Enabled>
+    </RequestProgress>
+</SelectObjectContentRequest>
+`)
+
+	s3Select, err := NewS3Select(bytes.NewReader(requestXML))
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	csvData := genSampleCSVData(count)
+
+	b.ResetTimer()
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		if err = s3Select.Open(func(offset, length int64) (io.ReadCloser, error) {
+			return ioutil.NopCloser(bytes.NewReader(csvData)), nil
+		}); err != nil {
+			b.Fatal(err)
+		}
+
+		s3Select.Evaluate(&nullResponseWriter{})
+		s3Select.Close()
+	}
+}
+
+func benchmarkSelectAll(b *testing.B, count int) {
+	benchmarkSelect(b, count, "select * from S3Object")
+}
+
+// BenchmarkSelectAll_100K - benchmark * function with 100k records.
+func BenchmarkSelectAll_100K(b *testing.B) {
+	benchmarkSelectAll(b, 100*humanize.KiByte)
+}
+
+// BenchmarkSelectAll_1M - benchmark * function with 1m records.
+func BenchmarkSelectAll_1M(b *testing.B) {
+	benchmarkSelectAll(b, 1*humanize.MiByte)
+}
+
+// BenchmarkSelectAll_2M - benchmark * function with 2m records.
+func BenchmarkSelectAll_2M(b *testing.B) {
+	benchmarkSelectAll(b, 2*humanize.MiByte)
+}
+
+// BenchmarkSelectAll_10M - benchmark * function with 10m records.
+func BenchmarkSelectAll_10M(b *testing.B) {
+	benchmarkSelectAll(b, 10*humanize.MiByte)
+}
+
+func benchmarkAggregateCount(b *testing.B, count int) {
+	benchmarkSelect(b, count, "select count(*) from S3Object")
+}
+
+// BenchmarkAggregateCount_100K - benchmark count(*) function with 100k records.
+func BenchmarkAggregateCount_100K(b *testing.B) {
+	benchmarkAggregateCount(b, 100*humanize.KiByte)
+}
+
+// BenchmarkAggregateCount_1M - benchmark count(*) function with 1m records.
+func BenchmarkAggregateCount_1M(b *testing.B) {
+	benchmarkAggregateCount(b, 1*humanize.MiByte)
+}
+
+// BenchmarkAggregateCount_2M - benchmark count(*) function with 2m records.
+func BenchmarkAggregateCount_2M(b *testing.B) {
+	benchmarkAggregateCount(b, 2*humanize.MiByte)
+}
+
+// BenchmarkAggregateCount_10M - benchmark count(*) function with 10m records.
+func BenchmarkAggregateCount_10M(b *testing.B) {
+	benchmarkAggregateCount(b, 10*humanize.MiByte)
+}

pkg/s3select/select_test.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,594 +18,200 @@ package s3select
 
 import (
 	"bytes"
-	"encoding/csv"
-	"fmt"
-	"math/rand"
-	"strconv"
+	"go/build"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path"
+	"reflect"
 	"testing"
-	"time"
-
-	humanize "github.com/dustin/go-humanize"
-	"github.com/tidwall/gjson"
-
-	"github.com/minio/minio/pkg/s3select/format"
 )
 
-// This function returns the index of a string in a list
-func stringIndex(a string, list []string) int {
-	for i, v := range list {
-		if v == a {
-			return i
-		}
-	}
-	return -1
+type testResponseWriter struct {
+	statusCode int
+	response   []byte
 }
 
-// TestHelperFunctions is a unit test which tests some
-// small helper string functions.
-func TestHelperFunctions(t *testing.T) {
-	tables := []struct {
-		myReq    string
-		myList   []string
-		myIndex  int
-		expected bool
-	}{
-		{"test1", []string{"test1", "test2", "test3", "test4", "test5"}, 0, true},
-		{"random", []string{"test1", "test2", "test3", "test4", "test5"}, -1, false},
-		{"test3", []string{"test1", "test2", "test3", "test4", "test5"}, 2, true},
-	}
-	for _, table := range tables {
-		if format.StringInSlice(table.myReq, table.myList) != table.expected {
-			t.Error()
-		}
-		if stringIndex(table.myReq, table.myList) != table.myIndex {
-			t.Error()
-		}
-	}
+func (w *testResponseWriter) Header() http.Header {
+	return nil
 }
 
-// TestStateMachine is a unit test which ensures that the lowest level of the
-// interpreter is converting properly.
-func TestStateMachine(t *testing.T) {
-	tables := []struct {
-		operand  string
-		operator string
-		leftArg  string
-		err      error
-		expected bool
-	}{
-		{"", ">", "2012", nil, true},
-		{"2005", ">", "2012", nil, true},
-		{"2005", ">", "2012", nil, true},
-		{"2012.0000", ">", "2014.000", nil, true},
-		{"2012", "!=", "2014.000", nil, true},
-		{"NA", ">", "2014.000", nil, true},
-		{"2012", ">", "2014.000", nil, false},
-		{"2012.0000", ">", "2014", nil, false},
-		{"", "<", "2012", nil, false},
-		{"2012.0000", "<", "2014.000", nil, false},
-		{"2014", ">", "Random", nil, false},
-		{"test3", ">", "aandom", nil, false},
-		{"true", ">", "true", ErrUnsupportedSyntax, false},
-	}
-	for i, table := range tables {
-		val, err := evaluateOperator(gjson.Parse(table.leftArg), table.operator, gjson.Parse(table.operand))
-		if err != table.err {
-			t.Errorf("Test %d: expected %v, got %v", i+1, table.err, err)
-		}
-		if val != table.expected {
-			t.Errorf("Test %d: expected %t, got %t", i+1, table.expected, val)
-		}
-	}
+func (w *testResponseWriter) Write(p []byte) (int, error) {
+	w.response = append(w.response, p...)
+	return len(p), nil
 }
 
-// TestOperators is a unit test which ensures that the appropriate values are
-// being returned from the operators functions.
-func TestOperators(t *testing.T) {
-	tables := []struct {
-		operator string
-		err      error
-	}{
-		{">", nil},
-		{"%", ErrParseUnknownOperator},
-	}
-	for _, table := range tables {
-		err := checkValidOperator(table.operator)
-		if err != table.err {
-			t.Error()
-		}
-	}
+func (w *testResponseWriter) WriteHeader(statusCode int) {
+	w.statusCode = statusCode
 }
 
-// Unit tests for the main function that performs aggreggation.
-func TestAggregationFunc(t *testing.T) {
-	columnsMap := make(map[string]int)
-	columnsMap["Col1"] = 0
-	columnsMap["Col2"] = 1
-	tables := []struct {
-		counter        int
-		filtrCount     int
-		myAggVals      []float64
-		columnsMap     map[string]int
-		storeReqCols   []string
-		storeFunctions []string
-		record         []byte
-		err            error
-		expectedVal    float64
-	}{
-		{10, 5, []float64{10, 11, 12, 13, 14}, columnsMap, []string{"Col1"}, []string{"count"}, []byte("{\"Col1\":\"1\",\"Col2\":\"2\"}"), nil, 11},
-		{10, 5, []float64{10}, columnsMap, []string{"Col1"}, []string{"min"}, []byte("{\"Col1\":\"1\",\"Col2\":\"2\"}"), nil, 1},
-		{10, 5, []float64{10}, columnsMap, []string{"Col1"}, []string{"max"}, []byte("{\"Col1\":\"1\",\"Col2\":\"2\"}"), nil, 10},
-		{10, 5, []float64{10}, columnsMap, []string{"Col1"}, []string{"sum"}, []byte("{\"Col1\":\"1\",\"Col2\":\"2\"}"), nil, 11},
-		{1, 1, []float64{10}, columnsMap, []string{"Col1"}, []string{"avg"}, []byte("{\"Col1\":\"1\",\"Col2\":\"2\"}"), nil, 5.500},
-		{10, 5, []float64{0.0000}, columnsMap, []string{"Col1"}, []string{"random"}, []byte("{\"Col1\":\"1\",\"Col2\":\"2\"}"),
-			ErrParseNonUnaryAgregateFunctionCall, 0},
-		{0, 5, []float64{0}, columnsMap, []string{"0"}, []string{"count"}, []byte("{\"Col1\":\"1\",\"Col2\":\"2\"}"), nil, 1},
-		{10, 5, []float64{10}, columnsMap, []string{"1"}, []string{"min"}, []byte("{\"_1\":\"1\",\"_2\":\"2\"}"), nil, 1},
+func (w *testResponseWriter) Flush() {
 }
 
-	for _, table := range tables {
-		err := aggregationFns(table.counter, table.filtrCount, table.myAggVals, table.storeReqCols, table.storeFunctions, table.record)
-		if table.err != err {
-			t.Error()
-		}
-		if table.myAggVals[0] != table.expectedVal {
-			t.Error()
+func TestCSVINput(t *testing.T) {
+	var requestXML = []byte(`
+<?xml version="1.0" encoding="UTF-8"?>
+<SelectObjectContentRequest>
+    <Expression>SELECT one, two, three from S3Object</Expression>
+    <ExpressionType>SQL</ExpressionType>
+    <InputSerialization>
+        <CompressionType>NONE</CompressionType>
+        <CSV>
+            <FileHeaderInfo>USE</FileHeaderInfo>
+        </CSV>
+    </InputSerialization>
+    <OutputSerialization>
+        <CSV>
+        </CSV>
+    </OutputSerialization>
+    <RequestProgress>
+        <Enabled>FALSE</Enabled>
+    </RequestProgress>
+</SelectObjectContentRequest>
+`)
+
+	var csvData = []byte(`one,two,three
+10,true,"foo"
+-3,false,"bar baz"
+`)
+
+	var expectedResult = []byte{
+		0, 0, 0, 113, 0, 0, 0, 85, 186, 145, 179, 109, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 24, 97, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 111, 99, 116, 101, 116, 45, 115, 116, 114, 101, 97, 109, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 7, 82, 101, 99, 111, 114, 100, 115, 49, 48, 44, 116, 114, 117, 101, 44, 102, 111, 111, 10, 225, 160, 249, 157, 0, 0, 0, 118, 0, 0, 0, 85, 8, 177, 111, 125, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 24, 97, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 111, 99, 116, 101, 116, 45, 115, 116, 114, 101, 97, 109, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 7, 82, 101, 99, 111, 114, 100, 115, 45, 51, 44, 102, 97, 108, 115, 101, 44, 98, 97, 114, 32, 98, 97, 122, 10, 120, 72, 77, 126, 0, 0, 0, 235, 0, 0, 0, 67, 213, 243, 57, 141, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 8, 116, 101, 120, 116, 47, 120, 109, 108, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 5, 83, 116, 97, 116, 115, 60, 63, 120, 109, 108, 32, 118, 101, 114, 115, 105, 111, 110, 61, 34, 49, 46, 48, 34, 32, 101, 110, 99, 111, 100, 105, 110, 103, 61, 34, 85, 84, 70, 45, 56, 34, 63, 62, 60, 83, 116, 97, 116, 115, 62, 60, 66, 121, 116, 101, 115, 83, 99, 97, 110, 110, 101, 100, 62, 52, 55, 60, 47, 66, 121, 116, 101, 115, 83, 99, 97, 110, 110, 101, 100, 62, 60, 66, 121, 116, 101, 115, 80, 114, 111, 99, 101, 115, 115, 101, 100, 62, 52, 55, 60, 47, 66, 121, 116, 101, 115, 80, 114, 111, 99, 101, 115, 115, 101, 100, 62, 60, 66, 121, 116, 101, 115, 82, 101, 116, 117, 114, 110, 101, 100, 62, 50, 57, 60, 47, 66, 121, 116, 101, 115, 82, 101, 116, 117, 114, 110, 101, 100, 62, 60, 47, 83, 116, 97, 116, 115, 62, 214, 225, 163, 199, 0, 0, 0, 56, 0, 0, 0, 40, 193, 198, 132, 212, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 3, 69, 110, 100, 207, 151, 211, 146,
 	}
 
-	}
-}
-
-// TestStringComparator is a unit test which ensures that the appropriate
-// values are being compared for strings.
-func TestStringComparator(t *testing.T) {
-	tables := []struct {
-		operand  string
-		operator string
-		myVal    string
-		expected bool
-		err      error
-	}{
-		{"random", ">", "myName", "random" > "myName", nil},
-		{"12", "!=", "myName", "12" != "myName", nil},
-		{"12", "=", "myName", "12" == "myName", nil},
-		{"12", "<=", "myName", "12" <= "myName", nil},
-		{"12", ">=", "myName", "12" >= "myName", nil},
-		{"12", "<", "myName", "12" < "myName", nil},
-		{"name", "like", "_x%", false, nil},
-		{"12", "randomoperator", "myName", false, ErrUnsupportedSyntax},
-	}
-	for _, table := range tables {
-		myVal, err := stringEval(table.operand, table.operator, table.myVal)
-		if err != table.err {
-			t.Error()
-		}
-		if myVal != table.expected {
-			t.Error()
-		}
-	}
-}
-
-// TestFloatComparator is a unit test which ensures that the appropriate
-// values are being compared for floats.
-func TestFloatComparator(t *testing.T) {
-	tables := []struct {
-		operand  float64
-		operator string
-		myVal    float64
-		expected bool
-		err      error
-	}{
-		{12.000, ">", 13.000, 12.000 > 13.000, nil},
-		{1000.000, "!=", 1000.000, 1000.000 != 1000.000, nil},
-		{1000.000, "<", 1000.000, 1000.000 < 1000.000, nil},
-		{1000.000, "<=", 1000.000, 1000.000 <= 1000.000, nil},
-		{1000.000, ">=", 1000.000, 1000.000 >= 1000.000, nil},
-		{1000.000, "=", 1000.000, 1000.000 == 1000.000, nil},
-		{17.000, "randomoperator", 0.0, false, ErrUnsupportedSyntax},
-	}
-	for _, table := range tables {
-		myVal, err := floatEval(table.operand, table.operator, table.myVal)
-		if err != table.err {
-			t.Error()
-		}
-		if myVal != table.expected {
-			t.Error()
-		}
-	}
-}
-
-// TestIntComparator is a unit test which ensures that the appropriate values
-// are being compared for ints.
-func TestIntComparator(t *testing.T) {
-	tables := []struct {
-		operand  int64
-		operator string
-		myVal    int64
-		expected bool
-		err      error
-	}{
-		{12, ">", 13, 12.000 > 13.000, nil},
-		{1000, "!=", 1000, 1000.000 != 1000.000, nil},
-		{1000, "<", 1000, 1000.000 < 1000.000, nil},
-		{1000, "<=", 1000, 1000.000 <= 1000.000, nil},
-		{1000, ">=", 1000, 1000.000 >= 1000.000, nil},
-		{1000, "=", 1000, 1000.000 >= 1000.000, nil},
-		{17, "randomoperator", 0, false, ErrUnsupportedSyntax},
-	}
-	for _, table := range tables {
-		myVal, err := intEval(table.operand, table.operator, table.myVal)
-		if err != table.err {
-			t.Error()
-		}
-		if myVal != table.expected {
-			t.Error()
-		}
-	}
-}
-
-// TestSizeFunction is a function which provides unit testing for the function
-// which calculates size.
-func TestSizeFunction(t *testing.T) {
-	tables := []struct {
-		myRecord []string
-		expected int64
-	}{
-		{[]string{"test1", "test2", "test3", "test4", "test5"}, 30},
-	}
-	for _, table := range tables {
-		if format.ProcessSize(table.myRecord) != table.expected {
-			t.Error()
-		}
-
-	}
-}
-
-func TestMatch(t *testing.T) {
-	testCases := []struct {
-		pattern string
-		text    string
-		matched bool
-	}{
-		// Test case - 1.
-		// Test case so that the match occurs on the opening letter.
-		{
-			pattern: "a%",
-			text:    "apple",
-			matched: true,
-		},
-		// Test case - 2.
-		// Test case so that the ending letter is true.
-		{
-			pattern: "%m",
-			text:    "random",
-			matched: true,
-		},
-		// Test case - 3.
-		// Test case so that a character is at the appropriate position.
-		{
-			pattern: "_d%",
-			text:    "adam",
-			matched: true,
-		},
-		// Test case - 4.
-		// Test case so that a character is at the appropriate position.
-		{
-			pattern: "_d%",
-			text:    "apple",
-			matched: false,
-		},
-		// Test case - 5.
-		// Test case with checking that it is at least 3 in length
-		{
-			pattern: "a_%_%",
-			text:    "ap",
-			matched: false,
-		},
-		{
-			pattern: "a_%_%",
-			text:    "apple",
-			matched: true,
-		},
-		{
-			pattern: "%or%",
-			text:    "orphan",
-			matched: true,
-		},
-		{
-			pattern: "%or%",
-			text:    "dolphin",
-			matched: false,
-		},
-		{
-			pattern: "%or%",
-			text:    "dorlphin",
-			matched: true,
-		},
-		{
-			pattern: "2__3",
-			text:    "2003",
-			matched: true,
-		},
-		{
-			pattern: "_YYYY_",
-			text:    "aYYYYa",
-			matched: true,
-		},
-		{
-			pattern: "C%",
-			text:    "CA",
-			matched: true,
-		},
-		{
-			pattern: "C%",
-			text:    "SC",
-			matched: false,
-		},
-		{
-			pattern: "%C",
-			text:    "SC",
-			matched: true,
-		},
-		{
-			pattern: "%C",
-			text:    "CA",
-			matched: false,
-		},
-		{
-			pattern: "%C",
-			text:    "ACCC",
-			matched: true,
-		},
-		{
-			pattern: "C%",
-			text:    "CCC",
-			matched: true,
-		},
-		{
-			pattern: "j%",
-			text:    "mejri",
-			matched: false,
-		},
-		{
-			pattern: "a%o",
-			text:    "ando",
-			matched: true,
-		},
-		{
-			pattern: "%j",
-			text:    "mejri",
-			matched: false,
-		},
-		{
-			pattern: "%ja",
-			text:    "mejrija",
-			matched: true,
-		},
-		{
-			pattern: "ja%",
-			text:    "jamal",
-			matched: true,
-		},
-		{
-			pattern: "a%o",
-			text:    "andp",
-			matched: false,
-		},
-		{
-			pattern: "_r%",
-			text:    "arpa",
-			matched: true,
-		},
-		{
-			pattern: "_r%",
-			text:    "apra",
-			matched: false,
-		},
-		{
-			pattern: "a_%_%",
-			text:    "appple",
-			matched: true,
-		},
-		{
-			pattern: "l_b%",
-			text:    "lebron",
-			matched: true,
-		},
-		{
-			pattern: "leb%",
-			text:    "Dalembert",
-			matched: false,
-		},
-		{
-			pattern: "leb%",
-			text:    "Landesberg",
-			matched: false,
-		},
-		{
-			pattern: "leb%",
-			text:    "Mccalebb",
-			matched: false,
-		},
-		{
-			pattern: "%lebb",
-			text:    "Mccalebb",
-			matched: true,
-		},
-	}
-	// Iterating over the test cases, call the function under test and asert the output.
-	for i, testCase := range testCases {
-		actualResult, err := likeConvert(testCase.pattern, testCase.text)
+	s3Select, err := NewS3Select(bytes.NewReader(requestXML))
 	if err != nil {
-			t.Error()
-		}
-		if testCase.matched != actualResult {
-			fmt.Println("Expected Pattern", testCase.pattern, "Expected Text", testCase.text)
-			t.Errorf("Test %d: Expected the result to be `%v`, but instead found it to be `%v`", i+1, testCase.matched, actualResult)
-		}
-	}
+		t.Fatal(err)
 	}
 
-// TestFuncProcessing is a unit test which ensures that the appropriate values are
-// being returned from the Processing... functions.
-func TestFuncProcessing(t *testing.T) {
-	tables := []struct {
-		myString    string
-		coalList    []string
-		myValString string
-		myValCoal   string
-		myValNull   string
-		stringFunc  string
-	}{
-		{"lower", []string{"random", "hello", "random"}, "LOWER", "random", "", "UPPER"},
-		{"LOWER", []string{"missing", "hello", "random"}, "lower", "hello", "null", "LOWER"},
-	}
-	for _, table := range tables {
-		if table.coalList != nil {
-			myVal := processCoalNoIndex(table.coalList)
-			if myVal != table.myValCoal {
-				t.Error()
-			}
-		}
-		myVal := applyStrFunc(gjson.Result{
-			Type: gjson.String,
-			Str:  table.myString,
-		}, table.stringFunc)
-		if myVal != table.myValString {
-			t.Error()
+	if err = s3Select.Open(func(offset, length int64) (io.ReadCloser, error) {
+		return ioutil.NopCloser(bytes.NewReader(csvData)), nil
+	}); err != nil {
+		t.Fatal(err)
 	}
 
+	w := &testResponseWriter{}
+	s3Select.Evaluate(w)
+	s3Select.Close()
+
+	if !reflect.DeepEqual(w.response, expectedResult) {
+		t.Fatalf("received response does not match with expected reply")
 	}
 }
 
-const charset = "abcdefghijklmnopqrstuvwxyz" + "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+func TestJSONInput(t *testing.T) {
+	var requestXML = []byte(`
+<?xml version="1.0" encoding="UTF-8"?>
+<SelectObjectContentRequest>
+    <Expression>SELECT one, two, three from S3Object</Expression>
+    <ExpressionType>SQL</ExpressionType>
+    <InputSerialization>
+        <CompressionType>NONE</CompressionType>
+        <JSON>
+            <Type>DOCUMENT</Type>
+        </JSON>
+    </InputSerialization>
+    <OutputSerialization>
+        <CSV>
+        </CSV>
+    </OutputSerialization>
+    <RequestProgress>
+        <Enabled>FALSE</Enabled>
+    </RequestProgress>
+</SelectObjectContentRequest>
+`)
 
-var seededRand = rand.New(rand.NewSource(time.Now().UnixNano()))
+	var jsonData = []byte(`{"one":10,"two":true,"three":"foo"}
+{"one":-3,"two":true,"three":"bar baz"}
+`)
 
-func StringWithCharset(length int, charset string) string {
-	b := make([]byte, length)
-	for i := range b {
-		b[i] = charset[seededRand.Intn(len(charset))]
-	}
-	return string(b)
+	var expectedResult = []byte{
+		0, 0, 0, 113, 0, 0, 0, 85, 186, 145, 179, 109, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 24, 97, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 111, 99, 116, 101, 116, 45, 115, 116, 114, 101, 97, 109, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 7, 82, 101, 99, 111, 114, 100, 115, 49, 48, 44, 116, 114, 117, 101, 44, 102, 111, 111, 10, 225, 160, 249, 157, 0, 0, 0, 117, 0, 0, 0, 85, 79, 17, 21, 173, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 24, 97, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 111, 99, 116, 101, 116, 45, 115, 116, 114, 101, 97, 109, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 7, 82, 101, 99, 111, 114, 100, 115, 45, 51, 44, 116, 114, 117, 101, 44, 98, 97, 114, 32, 98, 97, 122, 10, 34, 12, 125, 218, 0, 0, 0, 235, 0, 0, 0, 67, 213, 243, 57, 141, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 8, 116, 101, 120, 116, 47, 120, 109, 108, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 5, 83, 116, 97, 116, 115, 60, 63, 120, 109, 108, 32, 118, 101, 114, 115, 105, 111, 110, 61, 34, 49, 46, 48, 34, 32, 101, 110, 99, 111, 100, 105, 110, 103, 61, 34, 85, 84, 70, 45, 56, 34, 63, 62, 60, 83, 116, 97, 116, 115, 62, 60, 66, 121, 116, 101, 115, 83, 99, 97, 110, 110, 101, 100, 62, 55, 54, 60, 47, 66, 121, 116, 101, 115, 83, 99, 97, 110, 110, 101, 100, 62, 60, 66, 121, 116, 101, 115, 80, 114, 111, 99, 101, 115, 115, 101, 100, 62, 55, 54, 60, 47, 66, 121, 116, 101, 115, 80, 114, 111, 99, 101, 115, 115, 101, 100, 62, 60, 66, 121, 116, 101, 115, 82, 101, 116, 117, 114, 110, 101, 100, 62, 50, 56, 60, 47, 66, 121, 116, 101, 115, 82, 101, 116, 117, 114, 110, 101, 100, 62, 60, 47, 83, 116, 97, 116, 115, 62, 124, 107, 174, 242, 0, 0, 0, 56, 0, 0, 0, 40, 193, 198, 132, 212, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 3, 69, 110, 100, 207, 151, 211, 146,
 	}
 
-func String(length int) string {
-	return StringWithCharset(length, charset)
-}
-
-func genCSV(b *bytes.Buffer, records int) error {
-	b.Reset()
-	w := csv.NewWriter(b)
-	w.Write([]string{"id", "name", "age", "city"})
-
-	for i := 0; i < records; i++ {
-		w.Write([]string{
-			strconv.Itoa(i),
-			String(10),
-			String(5),
-			String(10),
-		})
-	}
-
-	// Write any buffered data to the underlying writer (standard output).
-	w.Flush()
-
-	return w.Error()
-}
-
-func benchmarkSQLAll(b *testing.B, records int) {
-	benchmarkSQL(b, records, "select * from S3Object")
-}
-
-func benchmarkSQLAggregate(b *testing.B, records int) {
-	benchmarkSQL(b, records, "select count(*) from S3Object")
-}
-
-func benchmarkSQL(b *testing.B, records int, query string) {
-	var (
-		buf    bytes.Buffer
-		output bytes.Buffer
-	)
-	genCSV(&buf, records)
-
-	b.ResetTimer()
-	b.ReportAllocs()
-
-	sreq := ObjectSelectRequest{}
-	sreq.Expression = query
-	sreq.ExpressionType = QueryExpressionTypeSQL
-	sreq.InputSerialization.CSV = &struct {
-		FileHeaderInfo       CSVFileHeaderInfo
-		RecordDelimiter      string
-		FieldDelimiter       string
-		QuoteCharacter       string
-		QuoteEscapeCharacter string
-		Comments             string
-	}{}
-	sreq.InputSerialization.CSV.FileHeaderInfo = CSVFileHeaderInfoUse
-	sreq.InputSerialization.CSV.RecordDelimiter = "\n"
-	sreq.InputSerialization.CSV.FieldDelimiter = ","
-
-	sreq.OutputSerialization.CSV = &struct {
-		QuoteFields          CSVQuoteFields
-		RecordDelimiter      string
-		FieldDelimiter       string
-		QuoteCharacter       string
-		QuoteEscapeCharacter string
-	}{}
-	sreq.OutputSerialization.CSV.RecordDelimiter = "\n"
-	sreq.OutputSerialization.CSV.FieldDelimiter = ","
-
-	s3s, err := New(&buf, int64(buf.Len()), sreq)
+	s3Select, err := NewS3Select(bytes.NewReader(requestXML))
 	if err != nil {
-		b.Fatal(err)
+		t.Fatal(err)
 	}
 
-	for i := 0; i < b.N; i++ {
-		output.Reset()
-		if err = Execute(&output, s3s); err != nil {
-			b.Fatal(err)
+	if err = s3Select.Open(func(offset, length int64) (io.ReadCloser, error) {
+		return ioutil.NopCloser(bytes.NewReader(jsonData)), nil
+	}); err != nil {
+		t.Fatal(err)
 	}
+
+	w := &testResponseWriter{}
+	s3Select.Evaluate(w)
+	s3Select.Close()
+
+	if !reflect.DeepEqual(w.response, expectedResult) {
+		t.Fatalf("received response does not match with expected reply")
 	}
 }
 
-// BenchmarkSQLAggregate_100K - benchmark count(*) function with 100k records.
-func BenchmarkSQLAggregate_100K(b *testing.B) {
-	benchmarkSQLAggregate(b, humanize.KiByte*100)
+func TestParquetInput(t *testing.T) {
+	var requestXML = []byte(`
+<?xml version="1.0" encoding="UTF-8"?>
+<SelectObjectContentRequest>
+    <Expression>SELECT one, two, three from S3Object</Expression>
+    <ExpressionType>SQL</ExpressionType>
+    <InputSerialization>
+        <CompressionType>NONE</CompressionType>
+        <Parquet>
+        </Parquet>
+    </InputSerialization>
+    <OutputSerialization>
+        <CSV>
+        </CSV>
+    </OutputSerialization>
+    <RequestProgress>
+        <Enabled>FALSE</Enabled>
+    </RequestProgress>
+</SelectObjectContentRequest>
+`)
+
+	getReader := func(offset int64, length int64) (io.ReadCloser, error) {
+		testdataFile := path.Join(build.Default.GOPATH, "src/github.com/minio/minio/pkg/s3select/testdata.parquet")
+		file, err := os.Open(testdataFile)
+		if err != nil {
+			return nil, err
 		}
 
-// BenchmarkSQLAggregate_1M - benchmark count(*) function with 1m records.
-func BenchmarkSQLAggregate_1M(b *testing.B) {
-	benchmarkSQLAggregate(b, humanize.MiByte)
+		fi, err := file.Stat()
+		if err != nil {
+			return nil, err
 		}
 
-// BenchmarkSQLAggregate_2M - benchmark count(*) function with 2m records.
-func BenchmarkSQLAggregate_2M(b *testing.B) {
-	benchmarkSQLAggregate(b, 2*humanize.MiByte)
+		if offset < 0 {
+			offset = fi.Size() + offset
 		}
 
-// BenchmarkSQLAggregate_10M - benchmark count(*) function with 10m records.
-func BenchmarkSQLAggregate_10M(b *testing.B) {
-	benchmarkSQLAggregate(b, 10*humanize.MiByte)
+		if _, err = file.Seek(offset, os.SEEK_SET); err != nil {
+			return nil, err
 		}
 
-// BenchmarkSQLAll_100K - benchmark * function with 100k records.
-func BenchmarkSQLAll_100K(b *testing.B) {
-	benchmarkSQLAll(b, humanize.KiByte*100)
+		return file, nil
 	}
 
-// BenchmarkSQLAll_1M - benchmark * function with 1m records.
-func BenchmarkSQLAll_1M(b *testing.B) {
-	benchmarkSQLAll(b, humanize.MiByte)
+	var expectedResult = []byte{
+		0, 0, 0, 114, 0, 0, 0, 85, 253, 49, 201, 189, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 24, 97, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 111, 99, 116, 101, 116, 45, 115, 116, 114, 101, 97, 109, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 7, 82, 101, 99, 111, 114, 100, 115, 50, 46, 53, 44, 102, 111, 111, 44, 116, 114, 117, 101, 10, 209, 8, 249, 77, 0, 0, 0, 114, 0, 0, 0, 85, 253, 49, 201, 189, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 24, 97, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 111, 99, 116, 101, 116, 45, 115, 116, 114, 101, 97, 109, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 7, 82, 101, 99, 111, 114, 100, 115, 45, 49, 44, 98, 97, 114, 44, 102, 97, 108, 115, 101, 10, 45, 143, 126, 67, 0, 0, 0, 113, 0, 0, 0, 85, 186, 145, 179, 109, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 24, 97, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 111, 99, 116, 101, 116, 45, 115, 116, 114, 101, 97, 109, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 7, 82, 101, 99, 111, 114, 100, 115, 45, 49, 44, 98, 97, 122, 44, 116, 114, 117, 101, 10, 230, 139, 42, 176, 0, 0, 0, 235, 0, 0, 0, 67, 213, 243, 57, 141, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 13, 58, 99, 111, 110, 116, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 8, 116, 101, 120, 116, 47, 120, 109, 108, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 5, 83, 116, 97, 116, 115, 60, 63, 120, 109, 108, 32, 118, 101, 114, 115, 105, 111, 110, 61, 34, 49, 46, 48, 34, 32, 101, 110, 99, 111, 100, 105, 110, 103, 61, 34, 85, 84, 70, 45, 56, 34, 63, 62, 60, 83, 116, 97, 116, 115, 62, 60, 66, 121, 116, 101, 115, 83, 99, 97, 110, 110, 101, 100, 62, 45, 49, 60, 47, 66, 121, 116, 101, 115, 83, 99, 97, 110, 110, 101, 100, 62, 60, 66, 121, 116, 101, 115, 80, 114, 111, 99, 101, 115, 115, 101, 100, 62, 45, 49, 60, 47, 66, 121, 116, 101, 115, 80, 114, 111, 99, 101, 115, 115, 101, 100, 62, 60, 66, 121, 116, 101, 115, 82, 101, 116, 117, 114, 110, 101, 100, 62, 51, 56, 60, 47, 66, 121, 116, 101, 115, 82, 101, 116, 117, 114, 110, 101, 100, 62, 60, 47, 83, 116, 97, 116, 115, 62, 199, 176, 2, 83, 0, 0, 0, 56, 0, 0, 0, 40, 193, 198, 132, 212, 13, 58, 109, 101, 115, 115, 97, 103, 101, 45, 116, 121, 112, 101, 7, 0, 5, 101, 118, 101, 110, 116, 11, 58, 101, 118, 101, 110, 116, 45, 116, 121, 112, 101, 7, 0, 3, 69, 110, 100, 207, 151, 211, 146,
 	}
 
-// BenchmarkSQLAll_2M - benchmark * function with 2m records.
-func BenchmarkSQLAll_2M(b *testing.B) {
-	benchmarkSQLAll(b, 2*humanize.MiByte)
+	s3Select, err := NewS3Select(bytes.NewReader(requestXML))
+	if err != nil {
+		t.Fatal(err)
 	}
 
-// BenchmarkSQLAll_10M - benchmark * function with 10m records.
-func BenchmarkSQLAll_10M(b *testing.B) {
-	benchmarkSQLAll(b, 10*humanize.MiByte)
+	if err = s3Select.Open(getReader); err != nil {
+		t.Fatal(err)
+	}
+
+	w := &testResponseWriter{}
+	s3Select.Evaluate(w)
+	s3Select.Close()
+
+	if !reflect.DeepEqual(w.response, expectedResult) {
+		t.Fatalf("received response does not match with expected reply")
+	}
 }

pkg/s3select/sql/arithexpr.go

@@ -0,0 +1,175 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import "fmt"
+
+// ArithOperator - arithmetic operator.
+type ArithOperator string
+
+const (
+	// Add operator '+'.
+	Add ArithOperator = "+"
+
+	// Subtract operator '-'.
+	Subtract ArithOperator = "-"
+
+	// Multiply operator '*'.
+	Multiply ArithOperator = "*"
+
+	// Divide operator '/'.
+	Divide ArithOperator = "/"
+
+	// Modulo operator '%'.
+	Modulo ArithOperator = "%"
+)
+
+// arithExpr - arithmetic function.
+type arithExpr struct {
+	left     Expr
+	right    Expr
+	operator ArithOperator
+	funcType Type
+}
+
+// String - returns string representation of this function.
+func (f *arithExpr) String() string {
+	return fmt.Sprintf("(%v %v %v)", f.left, f.operator, f.right)
+}
+
+func (f *arithExpr) compute(lv, rv *Value) (*Value, error) {
+	leftValueType := lv.Type()
+	rightValueType := rv.Type()
+	if !leftValueType.isNumber() {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to number", f, leftValueType)
+		return nil, errExternalEvalException(err)
+	}
+	if !rightValueType.isNumber() {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to number", f, rightValueType)
+		return nil, errExternalEvalException(err)
+	}
+
+	leftValue := lv.FloatValue()
+	rightValue := rv.FloatValue()
+
+	var result float64
+	switch f.operator {
+	case Add:
+		result = leftValue + rightValue
+	case Subtract:
+		result = leftValue - rightValue
+	case Multiply:
+		result = leftValue * rightValue
+	case Divide:
+		result = leftValue / rightValue
+	case Modulo:
+		result = float64(int64(leftValue) % int64(rightValue))
+	}
+
+	if leftValueType == Float || rightValueType == Float {
+		return NewFloat(result), nil
+	}
+
+	return NewInt(int64(result)), nil
+}
+
+// Call - evaluates this function for given arg values and returns result as Value.
+func (f *arithExpr) Eval(record Record) (*Value, error) {
+	leftValue, err := f.left.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	rightValue, err := f.right.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if f.funcType == aggregateFunction {
+		return nil, nil
+	}
+
+	return f.compute(leftValue, rightValue)
+}
+
+// AggregateValue - returns aggregated value.
+func (f *arithExpr) AggregateValue() (*Value, error) {
+	if f.funcType != aggregateFunction {
+		err := fmt.Errorf("%v is not aggreate expression", f)
+		return nil, errExternalEvalException(err)
+	}
+
+	lv, err := f.left.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+
+	rv, err := f.right.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+
+	return f.compute(lv, rv)
+}
+
+// Type - returns arithmeticFunction or aggregateFunction type.
+func (f *arithExpr) Type() Type {
+	return f.funcType
+}
+
+// ReturnType - returns Float as return type.
+func (f *arithExpr) ReturnType() Type {
+	return Float
+}
+
+// newArithExpr - creates new arithmetic function.
+func newArithExpr(operator ArithOperator, left, right Expr) (*arithExpr, error) {
+	if !left.ReturnType().isNumberKind() {
+		err := fmt.Errorf("operator %v: left side expression %v evaluate to %v, not number", operator, left, left.ReturnType())
+		return nil, errInvalidDataType(err)
+	}
+
+	if !right.ReturnType().isNumberKind() {
+		err := fmt.Errorf("operator %v: right side expression %v evaluate to %v; not number", operator, right, right.ReturnType())
+		return nil, errInvalidDataType(err)
+	}
+
+	funcType := arithmeticFunction
+	if left.Type() == aggregateFunction || right.Type() == aggregateFunction {
+		funcType = aggregateFunction
+		switch left.Type() {
+		case Int, Float, aggregateFunction:
+		default:
+			err := fmt.Errorf("operator %v: left side expression %v return type %v is incompatible for aggregate evaluation", operator, left, left.Type())
+			return nil, errUnsupportedSQLOperation(err)
+		}
+
+		switch right.Type() {
+		case Int, Float, aggregateFunction:
+		default:
+			err := fmt.Errorf("operator %v: right side expression %v return type %v is incompatible for aggregate evaluation", operator, right, right.Type())
+			return nil, errUnsupportedSQLOperation(err)
+		}
+	}
+
+	return &arithExpr{
+		left:     left,
+		right:    right,
+		operator: operator,
+		funcType: funcType,
+	}, nil
+}

pkg/s3select/sql/compexpr.go

@@ -0,0 +1,636 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+// ComparisonOperator - comparison operator.
+type ComparisonOperator string
+
+const (
+	// Equal operator '='.
+	Equal ComparisonOperator = "="
+
+	// NotEqual operator '!=' or '<>'.
+	NotEqual ComparisonOperator = "!="
+
+	// LessThan operator '<'.
+	LessThan ComparisonOperator = "<"
+
+	// GreaterThan operator '>'.
+	GreaterThan ComparisonOperator = ">"
+
+	// LessThanEqual operator '<='.
+	LessThanEqual ComparisonOperator = "<="
+
+	// GreaterThanEqual operator '>='.
+	GreaterThanEqual ComparisonOperator = ">="
+
+	// Between operator 'BETWEEN'
+	Between ComparisonOperator = "between"
+
+	// In operator 'IN'
+	In ComparisonOperator = "in"
+
+	// Like operator 'LIKE'
+	Like ComparisonOperator = "like"
+
+	// NotBetween operator 'NOT BETWEEN'
+	NotBetween ComparisonOperator = "not between"
+
+	// NotIn operator 'NOT IN'
+	NotIn ComparisonOperator = "not in"
+
+	// NotLike operator 'NOT LIKE'
+	NotLike ComparisonOperator = "not like"
+
+	// IsNull operator 'IS NULL'
+	IsNull ComparisonOperator = "is null"
+
+	// IsNotNull operator 'IS NOT NULL'
+	IsNotNull ComparisonOperator = "is not null"
+)
+
+// String - returns string representation of this operator.
+func (operator ComparisonOperator) String() string {
+	return strings.ToUpper((string(operator)))
+}
+
+func equal(leftValue, rightValue *Value) (bool, error) {
+	switch {
+	case leftValue.Type() == Null && rightValue.Type() == Null:
+		return true, nil
+	case leftValue.Type() == Bool && rightValue.Type() == Bool:
+		return leftValue.BoolValue() == rightValue.BoolValue(), nil
+	case (leftValue.Type() == Int || leftValue.Type() == Float) &&
+		(rightValue.Type() == Int || rightValue.Type() == Float):
+		return leftValue.FloatValue() == rightValue.FloatValue(), nil
+	case leftValue.Type() == String && rightValue.Type() == String:
+		return leftValue.StringValue() == rightValue.StringValue(), nil
+	case leftValue.Type() == Timestamp && rightValue.Type() == Timestamp:
+		return leftValue.TimeValue() == rightValue.TimeValue(), nil
+	}
+
+	return false, fmt.Errorf("left value type %v and right value type %v are incompatible for equality check", leftValue.Type(), rightValue.Type())
+}
+
+// comparisonExpr - comparison function.
+type comparisonExpr struct {
+	left     Expr
+	right    Expr
+	to       Expr
+	operator ComparisonOperator
+	funcType Type
+}
+
+// String - returns string representation of this function.
+func (f *comparisonExpr) String() string {
+	switch f.operator {
+	case Equal, NotEqual, LessThan, GreaterThan, LessThanEqual, GreaterThanEqual, In, Like, NotIn, NotLike:
+		return fmt.Sprintf("(%v %v %v)", f.left, f.operator, f.right)
+	case Between, NotBetween:
+		return fmt.Sprintf("(%v %v %v AND %v)", f.left, f.operator, f.right, f.to)
+	}
+
+	return fmt.Sprintf("(%v %v %v %v)", f.left, f.right, f.to, f.operator)
+}
+
+func (f *comparisonExpr) equal(leftValue, rightValue *Value) (*Value, error) {
+	result, err := equal(leftValue, rightValue)
+	if err != nil {
+		err = fmt.Errorf("%v: %v", f, err)
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(result), nil
+}
+
+func (f *comparisonExpr) notEqual(leftValue, rightValue *Value) (*Value, error) {
+	result, err := equal(leftValue, rightValue)
+	if err != nil {
+		err = fmt.Errorf("%v: %v", f, err)
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(!result), nil
+}
+
+func (f *comparisonExpr) lessThan(leftValue, rightValue *Value) (*Value, error) {
+	if !leftValue.Type().isNumber() {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to number", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+	if !rightValue.Type().isNumber() {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to number", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(leftValue.FloatValue() < rightValue.FloatValue()), nil
+}
+
+func (f *comparisonExpr) greaterThan(leftValue, rightValue *Value) (*Value, error) {
+	if !leftValue.Type().isNumber() {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to number", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+	if !rightValue.Type().isNumber() {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to number", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(leftValue.FloatValue() > rightValue.FloatValue()), nil
+}
+
+func (f *comparisonExpr) lessThanEqual(leftValue, rightValue *Value) (*Value, error) {
+	if !leftValue.Type().isNumber() {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to number", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+	if !rightValue.Type().isNumber() {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to number", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(leftValue.FloatValue() <= rightValue.FloatValue()), nil
+}
+
+func (f *comparisonExpr) greaterThanEqual(leftValue, rightValue *Value) (*Value, error) {
+	if !leftValue.Type().isNumber() {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to number", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+	if !rightValue.Type().isNumber() {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to number", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(leftValue.FloatValue() >= rightValue.FloatValue()), nil
+}
+
+func (f *comparisonExpr) computeBetween(leftValue, fromValue, toValue *Value) (bool, error) {
+	if !leftValue.Type().isNumber() {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to number", f, leftValue.Type())
+		return false, errExternalEvalException(err)
+	}
+	if !fromValue.Type().isNumber() {
+		err := fmt.Errorf("%v: from side expression evaluated to %v; not to number", f, fromValue.Type())
+		return false, errExternalEvalException(err)
+	}
+	if !toValue.Type().isNumber() {
+		err := fmt.Errorf("%v: to side expression evaluated to %v; not to number", f, toValue.Type())
+		return false, errExternalEvalException(err)
+	}
+
+	return leftValue.FloatValue() >= fromValue.FloatValue() &&
+		leftValue.FloatValue() <= toValue.FloatValue(), nil
+}
+
+func (f *comparisonExpr) between(leftValue, fromValue, toValue *Value) (*Value, error) {
+	result, err := f.computeBetween(leftValue, fromValue, toValue)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewBool(result), nil
+}
+
+func (f *comparisonExpr) notBetween(leftValue, fromValue, toValue *Value) (*Value, error) {
+	result, err := f.computeBetween(leftValue, fromValue, toValue)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewBool(!result), nil
+}
+
+func (f *comparisonExpr) computeIn(leftValue, rightValue *Value) (found bool, err error) {
+	if rightValue.Type() != Array {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to Array", f, rightValue.Type())
+		return false, errExternalEvalException(err)
+	}
+
+	values := rightValue.ArrayValue()
+
+	for i := range values {
+		found, err = equal(leftValue, values[i])
+		if err != nil {
+			return false, err
+		}
+
+		if found {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+func (f *comparisonExpr) in(leftValue, rightValue *Value) (*Value, error) {
+	result, err := f.computeIn(leftValue, rightValue)
+	if err != nil {
+		err = fmt.Errorf("%v: %v", f, err)
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(result), nil
+}
+
+func (f *comparisonExpr) notIn(leftValue, rightValue *Value) (*Value, error) {
+	result, err := f.computeIn(leftValue, rightValue)
+	if err != nil {
+		err = fmt.Errorf("%v: %v", f, err)
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(!result), nil
+}
+
+func (f *comparisonExpr) computeLike(leftValue, rightValue *Value) (matched bool, err error) {
+	if leftValue.Type() != String {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to string", f, leftValue.Type())
+		return false, errExternalEvalException(err)
+	}
+	if rightValue.Type() != String {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to string", f, rightValue.Type())
+		return false, errExternalEvalException(err)
+	}
+
+	matched, err = regexp.MatchString(rightValue.StringValue(), leftValue.StringValue())
+	if err != nil {
+		err = fmt.Errorf("%v: %v", f, err)
+		return false, errExternalEvalException(err)
+	}
+
+	return matched, nil
+}
+
+func (f *comparisonExpr) like(leftValue, rightValue *Value) (*Value, error) {
+	result, err := f.computeLike(leftValue, rightValue)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewBool(result), nil
+}
+
+func (f *comparisonExpr) notLike(leftValue, rightValue *Value) (*Value, error) {
+	result, err := f.computeLike(leftValue, rightValue)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewBool(!result), nil
+}
+
+func (f *comparisonExpr) compute(leftValue, rightValue, toValue *Value) (*Value, error) {
+	switch f.operator {
+	case Equal:
+		return f.equal(leftValue, rightValue)
+	case NotEqual:
+		return f.notEqual(leftValue, rightValue)
+	case LessThan:
+		return f.lessThan(leftValue, rightValue)
+	case GreaterThan:
+		return f.greaterThan(leftValue, rightValue)
+	case LessThanEqual:
+		return f.lessThanEqual(leftValue, rightValue)
+	case GreaterThanEqual:
+		return f.greaterThanEqual(leftValue, rightValue)
+	case Between:
+		return f.between(leftValue, rightValue, toValue)
+	case In:
+		return f.in(leftValue, rightValue)
+	case Like:
+		return f.like(leftValue, rightValue)
+	case NotBetween:
+		return f.notBetween(leftValue, rightValue, toValue)
+	case NotIn:
+		return f.notIn(leftValue, rightValue)
+	case NotLike:
+		return f.notLike(leftValue, rightValue)
+	}
+
+	panic(fmt.Errorf("unexpected expression %v", f))
+}
+
+// Call - evaluates this function for given arg values and returns result as Value.
+func (f *comparisonExpr) Eval(record Record) (*Value, error) {
+	leftValue, err := f.left.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	rightValue, err := f.right.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	var toValue *Value
+	if f.to != nil {
+		toValue, err = f.to.Eval(record)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if f.funcType == aggregateFunction {
+		return nil, nil
+	}
+
+	return f.compute(leftValue, rightValue, toValue)
+}
+
+// AggregateValue - returns aggregated value.
+func (f *comparisonExpr) AggregateValue() (*Value, error) {
+	if f.funcType != aggregateFunction {
+		err := fmt.Errorf("%v is not aggreate expression", f)
+		return nil, errExternalEvalException(err)
+	}
+
+	leftValue, err := f.left.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+
+	rightValue, err := f.right.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+
+	var toValue *Value
+	if f.to != nil {
+		toValue, err = f.to.AggregateValue()
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return f.compute(leftValue, rightValue, toValue)
+}
+
+// Type - returns comparisonFunction or aggregateFunction type.
+func (f *comparisonExpr) Type() Type {
+	return f.funcType
+}
+
+// ReturnType - returns Bool as return type.
+func (f *comparisonExpr) ReturnType() Type {
+	return Bool
+}
+
+// newComparisonExpr - creates new comparison function.
+func newComparisonExpr(operator ComparisonOperator, funcs ...Expr) (*comparisonExpr, error) {
+	funcType := comparisonFunction
+	switch operator {
+	case Equal, NotEqual:
+		if len(funcs) != 2 {
+			panic(fmt.Sprintf("exactly two arguments are expected, but found %v", len(funcs)))
+		}
+
+		left := funcs[0]
+		if !left.ReturnType().isBaseKind() {
+			err := fmt.Errorf("operator %v: left side expression %v evaluate to %v is incompatible for equality check", operator, left, left.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		right := funcs[1]
+		if !right.ReturnType().isBaseKind() {
+			err := fmt.Errorf("operator %v: right side expression %v evaluate to %v is incompatible for equality check", operator, right, right.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		if left.Type() == aggregateFunction || right.Type() == aggregateFunction {
+			funcType = aggregateFunction
+			switch left.Type() {
+			case column, Array, function, arithmeticFunction, comparisonFunction, logicalFunction, record:
+				err := fmt.Errorf("operator %v: left side expression %v return type %v is incompatible for equality check", operator, left, left.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+			switch right.Type() {
+			case column, Array, function, arithmeticFunction, comparisonFunction, logicalFunction, record:
+				err := fmt.Errorf("operator %v: right side expression %v return type %v is incompatible for equality check", operator, right, right.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+		}
+
+		return &comparisonExpr{
+			left:     left,
+			right:    right,
+			operator: operator,
+			funcType: funcType,
+		}, nil
+
+	case LessThan, GreaterThan, LessThanEqual, GreaterThanEqual:
+		if len(funcs) != 2 {
+			panic(fmt.Sprintf("exactly two arguments are expected, but found %v", len(funcs)))
+		}
+
+		left := funcs[0]
+		if !left.ReturnType().isNumberKind() {
+			err := fmt.Errorf("operator %v: left side expression %v evaluate to %v, not number", operator, left, left.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		right := funcs[1]
+		if !right.ReturnType().isNumberKind() {
+			err := fmt.Errorf("operator %v: right side expression %v evaluate to %v; not number", operator, right, right.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		if left.Type() == aggregateFunction || right.Type() == aggregateFunction {
+			funcType = aggregateFunction
+			switch left.Type() {
+			case Int, Float, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: left side expression %v return type %v is incompatible for aggregate evaluation", operator, left, left.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+
+			switch right.Type() {
+			case Int, Float, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: right side expression %v return type %v is incompatible for aggregate evaluation", operator, right, right.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+		}
+
+		return &comparisonExpr{
+			left:     left,
+			right:    right,
+			operator: operator,
+			funcType: funcType,
+		}, nil
+
+	case In, NotIn:
+		if len(funcs) != 2 {
+			panic(fmt.Sprintf("exactly two arguments are expected, but found %v", len(funcs)))
+		}
+
+		left := funcs[0]
+		if !left.ReturnType().isBaseKind() {
+			err := fmt.Errorf("operator %v: left side expression %v evaluate to %v is incompatible for equality check", operator, left, left.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		right := funcs[1]
+		if right.ReturnType() != Array {
+			err := fmt.Errorf("operator %v: right side expression %v evaluate to %v is incompatible for equality check", operator, right, right.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		if left.Type() == aggregateFunction || right.Type() == aggregateFunction {
+			funcType = aggregateFunction
+			switch left.Type() {
+			case column, Array, function, arithmeticFunction, comparisonFunction, logicalFunction, record:
+				err := fmt.Errorf("operator %v: left side expression %v return type %v is incompatible for aggregate evaluation", operator, left, left.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+			switch right.Type() {
+			case Array, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: right side expression %v return type %v is incompatible for aggregate evaluation", operator, right, right.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+		}
+
+		return &comparisonExpr{
+			left:     left,
+			right:    right,
+			operator: operator,
+			funcType: funcType,
+		}, nil
+
+	case Like, NotLike:
+		if len(funcs) != 2 {
+			panic(fmt.Sprintf("exactly two arguments are expected, but found %v", len(funcs)))
+		}
+
+		left := funcs[0]
+		if !left.ReturnType().isStringKind() {
+			err := fmt.Errorf("operator %v: left side expression %v evaluate to %v, not string", operator, left, left.ReturnType())
+			return nil, errLikeInvalidInputs(err)
+		}
+
+		right := funcs[1]
+		if !right.ReturnType().isStringKind() {
+			err := fmt.Errorf("operator %v: right side expression %v evaluate to %v, not string", operator, right, right.ReturnType())
+			return nil, errLikeInvalidInputs(err)
+		}
+
+		if left.Type() == aggregateFunction || right.Type() == aggregateFunction {
+			funcType = aggregateFunction
+			switch left.Type() {
+			case String, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: left side expression %v return type %v is incompatible for aggregate evaluation", operator, left, left.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+			switch right.Type() {
+			case String, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: right side expression %v return type %v is incompatible for aggregate evaluation", operator, right, right.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+		}
+
+		return &comparisonExpr{
+			left:     left,
+			right:    right,
+			operator: operator,
+			funcType: funcType,
+		}, nil
+	case Between, NotBetween:
+		if len(funcs) != 3 {
+			panic(fmt.Sprintf("too many values in funcs %v", funcs))
+		}
+
+		left := funcs[0]
+		if !left.ReturnType().isNumberKind() {
+			err := fmt.Errorf("operator %v: left side expression %v evaluate to %v, not number", operator, left, left.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		from := funcs[1]
+		if !from.ReturnType().isNumberKind() {
+			err := fmt.Errorf("operator %v: from expression %v evaluate to %v, not number", operator, from, from.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		to := funcs[2]
+		if !to.ReturnType().isNumberKind() {
+			err := fmt.Errorf("operator %v: to expression %v evaluate to %v, not number", operator, to, to.ReturnType())
+			return nil, errInvalidDataType(err)
+		}
+
+		if left.Type() == aggregateFunction || from.Type() == aggregateFunction || to.Type() == aggregateFunction {
+			funcType = aggregateFunction
+			switch left.Type() {
+			case Int, Float, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: left side expression %v return type %v is incompatible for aggregate evaluation", operator, left, left.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+			switch from.Type() {
+			case Int, Float, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: from expression %v return type %v is incompatible for aggregate evaluation", operator, from, from.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+			switch to.Type() {
+			case Int, Float, aggregateFunction:
+			default:
+				err := fmt.Errorf("operator %v: to expression %v return type %v is incompatible for aggregate evaluation", operator, to, to.Type())
+				return nil, errUnsupportedSQLOperation(err)
+			}
+		}
+
+		return &comparisonExpr{
+			left:     left,
+			right:    from,
+			to:       to,
+			operator: operator,
+			funcType: funcType,
+		}, nil
+	case IsNull, IsNotNull:
+		if len(funcs) != 1 {
+			panic(fmt.Sprintf("too many values in funcs %v", funcs))
+		}
+
+		if funcs[0].Type() == aggregateFunction {
+			funcType = aggregateFunction
+		}
+
+		if operator == IsNull {
+			operator = Equal
+		} else {
+			operator = NotEqual
+		}
+
+		return &comparisonExpr{
+			left:     funcs[0],
+			right:    newValueExpr(NewNull()),
+			operator: operator,
+			funcType: funcType,
+		}, nil
+	}
+
+	return nil, errParseUnknownOperator(fmt.Errorf("unknown operator %v", operator))
+}

pkg/s3select/sql/errors.go

@@ -0,0 +1,215 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+type s3Error struct {
+	code       string
+	message    string
+	statusCode int
+	cause      error
+}
+
+func (err *s3Error) Cause() error {
+	return err.cause
+}
+
+func (err *s3Error) ErrorCode() string {
+	return err.code
+}
+
+func (err *s3Error) ErrorMessage() string {
+	return err.message
+}
+
+func (err *s3Error) HTTPStatusCode() int {
+	return err.statusCode
+}
+
+func (err *s3Error) Error() string {
+	return err.message
+}
+
+func errUnsupportedSQLStructure(err error) *s3Error {
+	return &s3Error{
+		code:       "UnsupportedSqlStructure",
+		message:    "Encountered an unsupported SQL structure. Check the SQL Reference.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedSelect(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedSelect",
+		message:    "The SQL expression contains an unsupported use of SELECT.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseAsteriskIsNotAloneInSelectList(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseAsteriskIsNotAloneInSelectList",
+		message:    "Other expressions are not allowed in the SELECT list when '*' is used without dot notation in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseInvalidContextForWildcardInSelectList(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseInvalidContextForWildcardInSelectList",
+		message:    "Invalid use of * in SELECT list in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidDataType(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidDataType",
+		message:    "The SQL expression contains an invalid data type.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errUnsupportedFunction(err error) *s3Error {
+	return &s3Error{
+		code:       "UnsupportedFunction",
+		message:    "Encountered an unsupported SQL function.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseNonUnaryAgregateFunctionCall(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseNonUnaryAgregateFunctionCall",
+		message:    "Only one argument is supported for aggregate functions in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errIncorrectSQLFunctionArgumentType(err error) *s3Error {
+	return &s3Error{
+		code:       "IncorrectSqlFunctionArgumentType",
+		message:    "Incorrect type of arguments in function call in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorInvalidArguments(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorInvalidArguments",
+		message:    "Incorrect number of arguments in the function call in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errUnsupportedSQLOperation(err error) *s3Error {
+	return &s3Error{
+		code:       "UnsupportedSqlOperation",
+		message:    "Encountered an unsupported SQL operation.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnknownOperator(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnknownOperator",
+		message:    "The SQL expression contains an invalid operator.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errLikeInvalidInputs(err error) *s3Error {
+	return &s3Error{
+		code:       "LikeInvalidInputs",
+		message:    "Invalid argument given to the LIKE clause in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errExternalEvalException(err error) *s3Error {
+	return &s3Error{
+		code:       "ExternalEvalException",
+		message:    "The query cannot be evaluated. Check the file and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errValueParseFailure(err error) *s3Error {
+	return &s3Error{
+		code:       "ValueParseFailure",
+		message:    "Time stamp parse failure in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorBindingDoesNotExist(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorBindingDoesNotExist",
+		message:    "A column name or a path provided does not exist in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInternalError(err error) *s3Error {
+	return &s3Error{
+		code:       "InternalError",
+		message:    "Encountered an internal error.",
+		statusCode: 500,
+		cause:      err,
+	}
+}
+
+func errParseInvalidTypeParam(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseInvalidTypeParam",
+		message:    "The SQL expression contains an invalid parameter value.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedSyntax(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedSyntax",
+		message:    "The SQL expression contains unsupported syntax.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidKeyPath(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidKeyPath",
+		message:    "Key path in the SQL expression is invalid.",
+		statusCode: 400,
+		cause:      err,
+	}
+}

pkg/s3select/sql/expr.go

@@ -0,0 +1,160 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import (
+	"fmt"
+)
+
+// Expr - a SQL expression type.
+type Expr interface {
+	AggregateValue() (*Value, error)
+	Eval(record Record) (*Value, error)
+	ReturnType() Type
+	Type() Type
+}
+
+// aliasExpr - aliases expression by alias.
+type aliasExpr struct {
+	alias string
+	expr  Expr
+}
+
+// String - returns string representation of this expression.
+func (expr *aliasExpr) String() string {
+	return fmt.Sprintf("(%v AS %v)", expr.expr, expr.alias)
+}
+
+// Eval - evaluates underlaying expression for given record and returns evaluated result.
+func (expr *aliasExpr) Eval(record Record) (*Value, error) {
+	return expr.expr.Eval(record)
+}
+
+// AggregateValue - returns aggregated value from underlaying expression.
+func (expr *aliasExpr) AggregateValue() (*Value, error) {
+	return expr.expr.AggregateValue()
+}
+
+// Type - returns underlaying expression type.
+func (expr *aliasExpr) Type() Type {
+	return expr.expr.Type()
+}
+
+// ReturnType - returns underlaying expression's return type.
+func (expr *aliasExpr) ReturnType() Type {
+	return expr.expr.ReturnType()
+}
+
+// newAliasExpr - creates new alias expression.
+func newAliasExpr(alias string, expr Expr) *aliasExpr {
+	return &aliasExpr{alias, expr}
+}
+
+// starExpr - asterisk (*) expression.
+type starExpr struct {
+}
+
+// String - returns string representation of this expression.
+func (expr *starExpr) String() string {
+	return "*"
+}
+
+// Eval - returns given args as map value.
+func (expr *starExpr) Eval(record Record) (*Value, error) {
+	return newRecordValue(record), nil
+}
+
+// AggregateValue - returns nil value.
+func (expr *starExpr) AggregateValue() (*Value, error) {
+	return nil, nil
+}
+
+// Type - returns record type.
+func (expr *starExpr) Type() Type {
+	return record
+}
+
+// ReturnType - returns record as return type.
+func (expr *starExpr) ReturnType() Type {
+	return record
+}
+
+// newStarExpr - returns new asterisk (*) expression.
+func newStarExpr() *starExpr {
+	return &starExpr{}
+}
+
+type valueExpr struct {
+	value *Value
+}
+
+func (expr *valueExpr) String() string {
+	return expr.value.String()
+}
+
+func (expr *valueExpr) Eval(record Record) (*Value, error) {
+	return expr.value, nil
+}
+
+func (expr *valueExpr) AggregateValue() (*Value, error) {
+	return expr.value, nil
+}
+
+func (expr *valueExpr) Type() Type {
+	return expr.value.Type()
+}
+
+func (expr *valueExpr) ReturnType() Type {
+	return expr.value.Type()
+}
+
+func newValueExpr(value *Value) *valueExpr {
+	return &valueExpr{value: value}
+}
+
+type columnExpr struct {
+	name string
+}
+
+func (expr *columnExpr) String() string {
+	return expr.name
+}
+
+func (expr *columnExpr) Eval(record Record) (*Value, error) {
+	value, err := record.Get(expr.name)
+	if err != nil {
+		return nil, errEvaluatorBindingDoesNotExist(err)
+	}
+
+	return value, nil
+}
+
+func (expr *columnExpr) AggregateValue() (*Value, error) {
+	return nil, nil
+}
+
+func (expr *columnExpr) Type() Type {
+	return column
+}
+
+func (expr *columnExpr) ReturnType() Type {
+	return column
+}
+
+func newColumnExpr(columnName string) *columnExpr {
+	return &columnExpr{name: columnName}
+}

pkg/s3select/sql/funcexpr.go

@@ -0,0 +1,550 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// FuncName - SQL function name.
+type FuncName string
+
+const (
+	// Avg - aggregate SQL function AVG().
+	Avg FuncName = "AVG"
+
+	// Count - aggregate SQL function COUNT().
+	Count FuncName = "COUNT"
+
+	// Max - aggregate SQL function MAX().
+	Max FuncName = "MAX"
+
+	// Min - aggregate SQL function MIN().
+	Min FuncName = "MIN"
+
+	// Sum - aggregate SQL function SUM().
+	Sum FuncName = "SUM"
+
+	// Coalesce - conditional SQL function COALESCE().
+	Coalesce FuncName = "COALESCE"
+
+	// NullIf - conditional SQL function NULLIF().
+	NullIf FuncName = "NULLIF"
+
+	// ToTimestamp - conversion SQL function TO_TIMESTAMP().
+	ToTimestamp FuncName = "TO_TIMESTAMP"
+
+	// UTCNow - date SQL function UTCNOW().
+	UTCNow FuncName = "UTCNOW"
+
+	// CharLength - string SQL function CHAR_LENGTH().
+	CharLength FuncName = "CHAR_LENGTH"
+
+	// CharacterLength - string SQL function CHARACTER_LENGTH() same as CHAR_LENGTH().
+	CharacterLength FuncName = "CHARACTER_LENGTH"
+
+	// Lower - string SQL function LOWER().
+	Lower FuncName = "LOWER"
+
+	// Substring - string SQL function SUBSTRING().
+	Substring FuncName = "SUBSTRING"
+
+	// Trim - string SQL function TRIM().
+	Trim FuncName = "TRIM"
+
+	// Upper - string SQL function UPPER().
+	Upper FuncName = "UPPER"
+
+	// DateAdd         FuncName = "DATE_ADD"
+	// DateDiff        FuncName = "DATE_DIFF"
+	// Extract         FuncName = "EXTRACT"
+	// ToString        FuncName = "TO_STRING"
+	// Cast            FuncName = "CAST" // CAST('2007-04-05T14:30Z' AS TIMESTAMP)
+)
+
+func isAggregateFuncName(s string) bool {
+	switch FuncName(s) {
+	case Avg, Count, Max, Min, Sum:
+		return true
+	}
+
+	return false
+}
+
+func callForNumber(f Expr, record Record) (*Value, error) {
+	value, err := f.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if !value.Type().isNumber() {
+		err := fmt.Errorf("%v evaluated to %v; not to number", f, value.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return value, nil
+}
+
+func callForInt(f Expr, record Record) (*Value, error) {
+	value, err := f.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if value.Type() != Int {
+		err := fmt.Errorf("%v evaluated to %v; not to int", f, value.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return value, nil
+}
+
+func callForString(f Expr, record Record) (*Value, error) {
+	value, err := f.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if value.Type() != String {
+		err := fmt.Errorf("%v evaluated to %v; not to string", f, value.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return value, nil
+}
+
+// funcExpr - SQL function.
+type funcExpr struct {
+	args []Expr
+	name FuncName
+
+	sumValue   float64
+	countValue int64
+	maxValue   float64
+	minValue   float64
+}
+
+// String - returns string representation of this function.
+func (f *funcExpr) String() string {
+	var argStrings []string
+	for _, arg := range f.args {
+		argStrings = append(argStrings, fmt.Sprintf("%v", arg))
+	}
+
+	return fmt.Sprintf("%v(%v)", f.name, strings.Join(argStrings, ","))
+}
+
+func (f *funcExpr) sum(record Record) (*Value, error) {
+	value, err := callForNumber(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	f.sumValue += value.FloatValue()
+	f.countValue++
+	return nil, nil
+}
+
+func (f *funcExpr) count(record Record) (*Value, error) {
+	value, err := f.args[0].Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if value.valueType != Null {
+		f.countValue++
+	}
+
+	return nil, nil
+}
+
+func (f *funcExpr) max(record Record) (*Value, error) {
+	value, err := callForNumber(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	v := value.FloatValue()
+	if v > f.maxValue {
+		f.maxValue = v
+	}
+
+	return nil, nil
+}
+
+func (f *funcExpr) min(record Record) (*Value, error) {
+	value, err := callForNumber(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	v := value.FloatValue()
+	if v < f.minValue {
+		f.minValue = v
+	}
+	return nil, nil
+}
+
+func (f *funcExpr) charLength(record Record) (*Value, error) {
+	value, err := callForString(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewInt(int64(len(value.StringValue()))), nil
+}
+
+func (f *funcExpr) trim(record Record) (*Value, error) {
+	value, err := callForString(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewString(strings.TrimSpace(value.StringValue())), nil
+}
+
+func (f *funcExpr) lower(record Record) (*Value, error) {
+	value, err := callForString(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewString(strings.ToLower(value.StringValue())), nil
+}
+
+func (f *funcExpr) upper(record Record) (*Value, error) {
+	value, err := callForString(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewString(strings.ToUpper(value.StringValue())), nil
+}
+
+func (f *funcExpr) substring(record Record) (*Value, error) {
+	stringValue, err := callForString(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	offsetValue, err := callForInt(f.args[1], record)
+	if err != nil {
+		return nil, err
+	}
+
+	var lengthValue *Value
+	if len(f.args) == 3 {
+		lengthValue, err = callForInt(f.args[2], record)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	value := stringValue.StringValue()
+	offset := int(offsetValue.FloatValue())
+	if offset < 0 || offset > len(value) {
+		offset = 0
+	}
+	length := len(value)
+	if lengthValue != nil {
+		length = int(lengthValue.FloatValue())
+		if length < 0 || length > len(value) {
+			length = len(value)
+		}
+	}
+
+	return NewString(value[offset:length]), nil
+}
+
+func (f *funcExpr) coalesce(record Record) (*Value, error) {
+	values := make([]*Value, len(f.args))
+	var err error
+	for i := range f.args {
+		values[i], err = f.args[i].Eval(record)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	for i := range values {
+		if values[i].Type() != Null {
+			return values[i], nil
+		}
+	}
+
+	return values[0], nil
+}
+
+func (f *funcExpr) nullIf(record Record) (*Value, error) {
+	value1, err := f.args[0].Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	value2, err := f.args[1].Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	result, err := equal(value1, value2)
+	if err != nil {
+		return nil, err
+	}
+
+	if result {
+		return NewNull(), nil
+	}
+
+	return value1, nil
+}
+
+func (f *funcExpr) toTimeStamp(record Record) (*Value, error) {
+	value, err := callForString(f.args[0], record)
+	if err != nil {
+		return nil, err
+	}
+
+	t, err := time.Parse(time.RFC3339, value.StringValue())
+	if err != nil {
+		err := fmt.Errorf("%v: value '%v': %v", f, value, err)
+		return nil, errValueParseFailure(err)
+	}
+
+	return NewTime(t), nil
+}
+
+func (f *funcExpr) utcNow(record Record) (*Value, error) {
+	return NewTime(time.Now().UTC()), nil
+}
+
+// Call - evaluates this function for given arg values and returns result as Value.
+func (f *funcExpr) Eval(record Record) (*Value, error) {
+	switch f.name {
+	case Avg, Sum:
+		return f.sum(record)
+	case Count:
+		return f.count(record)
+	case Max:
+		return f.max(record)
+	case Min:
+		return f.min(record)
+	case Coalesce:
+		return f.coalesce(record)
+	case NullIf:
+		return f.nullIf(record)
+	case ToTimestamp:
+		return f.toTimeStamp(record)
+	case UTCNow:
+		return f.utcNow(record)
+	case Substring:
+		return f.substring(record)
+	case CharLength, CharacterLength:
+		return f.charLength(record)
+	case Trim:
+		return f.trim(record)
+	case Lower:
+		return f.lower(record)
+	case Upper:
+		return f.upper(record)
+	}
+
+	panic(fmt.Sprintf("unsupported aggregate function %v", f.name))
+}
+
+// AggregateValue - returns aggregated value.
+func (f *funcExpr) AggregateValue() (*Value, error) {
+	switch f.name {
+	case Avg:
+		return NewFloat(f.sumValue / float64(f.countValue)), nil
+	case Count:
+		return NewInt(f.countValue), nil
+	case Max:
+		return NewFloat(f.maxValue), nil
+	case Min:
+		return NewFloat(f.minValue), nil
+	case Sum:
+		return NewFloat(f.sumValue), nil
+	}
+
+	err := fmt.Errorf("%v is not aggreate function", f)
+	return nil, errExternalEvalException(err)
+}
+
+// Type - returns Function or aggregateFunction type.
+func (f *funcExpr) Type() Type {
+	switch f.name {
+	case Avg, Count, Max, Min, Sum:
+		return aggregateFunction
+	}
+
+	return function
+}
+
+// ReturnType - returns respective primitive type depending on SQL function.
+func (f *funcExpr) ReturnType() Type {
+	switch f.name {
+	case Avg, Max, Min, Sum:
+		return Float
+	case Count:
+		return Int
+	case CharLength, CharacterLength, Trim, Lower, Upper, Substring:
+		return String
+	case ToTimestamp, UTCNow:
+		return Timestamp
+	case Coalesce, NullIf:
+		return column
+	}
+
+	return function
+}
+
+// newFuncExpr - creates new SQL function.
+func newFuncExpr(funcName FuncName, funcs ...Expr) (*funcExpr, error) {
+	switch funcName {
+	case Avg, Max, Min, Sum:
+		if len(funcs) != 1 {
+			err := fmt.Errorf("%v(): exactly one argument expected; got %v", funcName, len(funcs))
+			return nil, errParseNonUnaryAgregateFunctionCall(err)
+		}
+
+		if !funcs[0].ReturnType().isNumberKind() {
+			err := fmt.Errorf("%v(): argument %v evaluate to %v, not number", funcName, funcs[0], funcs[0].ReturnType())
+			return nil, errIncorrectSQLFunctionArgumentType(err)
+		}
+
+		return &funcExpr{
+			args: funcs,
+			name: funcName,
+		}, nil
+
+	case Count:
+		if len(funcs) != 1 {
+			err := fmt.Errorf("%v(): exactly one argument expected; got %v", funcName, len(funcs))
+			return nil, errParseNonUnaryAgregateFunctionCall(err)
+		}
+
+		switch funcs[0].ReturnType() {
+		case Null, Bool, Int, Float, String, Timestamp, column, record:
+		default:
+			err := fmt.Errorf("%v(): argument %v evaluate to %v is incompatible", funcName, funcs[0], funcs[0].ReturnType())
+			return nil, errIncorrectSQLFunctionArgumentType(err)
+		}
+
+		return &funcExpr{
+			args: funcs,
+			name: funcName,
+		}, nil
+
+	case CharLength, CharacterLength, Trim, Lower, Upper, ToTimestamp:
+		if len(funcs) != 1 {
+			err := fmt.Errorf("%v(): exactly one argument expected; got %v", funcName, len(funcs))
+			return nil, errEvaluatorInvalidArguments(err)
+		}
+
+		if !funcs[0].ReturnType().isStringKind() {
+			err := fmt.Errorf("%v(): argument %v evaluate to %v, not string", funcName, funcs[0], funcs[0].ReturnType())
+			return nil, errIncorrectSQLFunctionArgumentType(err)
+		}
+
+		return &funcExpr{
+			args: funcs,
+			name: funcName,
+		}, nil
+
+	case Coalesce:
+		if len(funcs) < 1 {
+			err := fmt.Errorf("%v(): one or more argument expected; got %v", funcName, len(funcs))
+			return nil, errEvaluatorInvalidArguments(err)
+		}
+
+		for i := range funcs {
+			if !funcs[i].ReturnType().isBaseKind() {
+				err := fmt.Errorf("%v(): argument-%v %v evaluate to %v is incompatible", funcName, i+1, funcs[i], funcs[i].ReturnType())
+				return nil, errIncorrectSQLFunctionArgumentType(err)
+			}
+		}
+
+		return &funcExpr{
+			args: funcs,
+			name: funcName,
+		}, nil
+
+	case NullIf:
+		if len(funcs) != 2 {
+			err := fmt.Errorf("%v(): exactly two arguments expected; got %v", funcName, len(funcs))
+			return nil, errEvaluatorInvalidArguments(err)
+		}
+
+		if !funcs[0].ReturnType().isBaseKind() {
+			err := fmt.Errorf("%v(): argument-1 %v evaluate to %v is incompatible", funcName, funcs[0], funcs[0].ReturnType())
+			return nil, errIncorrectSQLFunctionArgumentType(err)
+		}
+
+		if !funcs[1].ReturnType().isBaseKind() {
+			err := fmt.Errorf("%v(): argument-2 %v evaluate to %v is incompatible", funcName, funcs[1], funcs[1].ReturnType())
+			return nil, errIncorrectSQLFunctionArgumentType(err)
+		}
+
+		return &funcExpr{
+			args: funcs,
+			name: funcName,
+		}, nil
+
+	case UTCNow:
+		if len(funcs) != 0 {
+			err := fmt.Errorf("%v(): no argument expected; got %v", funcName, len(funcs))
+			return nil, errEvaluatorInvalidArguments(err)
+		}
+
+		return &funcExpr{
+			args: funcs,
+			name: funcName,
+		}, nil
+
+	case Substring:
+		if len(funcs) < 2 || len(funcs) > 3 {
+			err := fmt.Errorf("%v(): exactly two or three arguments expected; got %v", funcName, len(funcs))
+			return nil, errEvaluatorInvalidArguments(err)
+		}
+
+		if !funcs[0].ReturnType().isStringKind() {
+			err := fmt.Errorf("%v(): argument-1 %v evaluate to %v, not string", funcName, funcs[0], funcs[0].ReturnType())
+			return nil, errIncorrectSQLFunctionArgumentType(err)
+		}
+
+		if !funcs[1].ReturnType().isIntKind() {
+			err := fmt.Errorf("%v(): argument-2 %v evaluate to %v, not int", funcName, funcs[1], funcs[1].ReturnType())
+			return nil, errIncorrectSQLFunctionArgumentType(err)
+		}
+
+		if len(funcs) > 2 {
+			if !funcs[2].ReturnType().isIntKind() {
+				err := fmt.Errorf("%v(): argument-3 %v evaluate to %v, not int", funcName, funcs[2], funcs[2].ReturnType())
+				return nil, errIncorrectSQLFunctionArgumentType(err)
+			}
+		}
+
+		return &funcExpr{
+			args: funcs,
+			name: funcName,
+		}, nil
+	}
+
+	return nil, errUnsupportedFunction(fmt.Errorf("unknown function name %v", funcName))
+}

pkg/s3select/sql/logicalexpr.go

@@ -0,0 +1,336 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import "fmt"
+
+// andExpr - logical AND function.
+type andExpr struct {
+	left     Expr
+	right    Expr
+	funcType Type
+}
+
+// String - returns string representation of this function.
+func (f *andExpr) String() string {
+	return fmt.Sprintf("(%v AND %v)", f.left, f.right)
+}
+
+// Call - evaluates this function for given arg values and returns result as Value.
+func (f *andExpr) Eval(record Record) (*Value, error) {
+	leftValue, err := f.left.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if f.funcType == aggregateFunction {
+		_, err = f.right.Eval(record)
+		return nil, err
+	}
+
+	if leftValue.Type() != Bool {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to bool", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	if !leftValue.BoolValue() {
+		return leftValue, nil
+	}
+
+	rightValue, err := f.right.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+	if rightValue.Type() != Bool {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to bool", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return rightValue, nil
+}
+
+// AggregateValue - returns aggregated value.
+func (f *andExpr) AggregateValue() (*Value, error) {
+	if f.funcType != aggregateFunction {
+		err := fmt.Errorf("%v is not aggreate expression", f)
+		return nil, errExternalEvalException(err)
+	}
+
+	leftValue, err := f.left.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+	if leftValue.Type() != Bool {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to bool", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	if !leftValue.BoolValue() {
+		return leftValue, nil
+	}
+
+	rightValue, err := f.right.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+	if rightValue.Type() != Bool {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to bool", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return rightValue, nil
+}
+
+// Type - returns logicalFunction or aggregateFunction type.
+func (f *andExpr) Type() Type {
+	return f.funcType
+}
+
+// ReturnType - returns Bool as return type.
+func (f *andExpr) ReturnType() Type {
+	return Bool
+}
+
+// newAndExpr - creates new AND logical function.
+func newAndExpr(left, right Expr) (*andExpr, error) {
+	if !left.ReturnType().isBoolKind() {
+		err := fmt.Errorf("operator AND: left side expression %v evaluate to %v, not bool", left, left.ReturnType())
+		return nil, errInvalidDataType(err)
+	}
+
+	if !right.ReturnType().isBoolKind() {
+		err := fmt.Errorf("operator AND: right side expression %v evaluate to %v; not bool", right, right.ReturnType())
+		return nil, errInvalidDataType(err)
+	}
+
+	funcType := logicalFunction
+	if left.Type() == aggregateFunction || right.Type() == aggregateFunction {
+		funcType = aggregateFunction
+		if left.Type() == column {
+			err := fmt.Errorf("operator AND: left side expression %v return type %v is incompatible for aggregate evaluation", left, left.Type())
+			return nil, errUnsupportedSQLOperation(err)
+		}
+
+		if right.Type() == column {
+			err := fmt.Errorf("operator AND: right side expression %v return type %v is incompatible for aggregate evaluation", right, right.Type())
+			return nil, errUnsupportedSQLOperation(err)
+		}
+	}
+
+	return &andExpr{
+		left:     left,
+		right:    right,
+		funcType: funcType,
+	}, nil
+}
+
+// orExpr - logical OR function.
+type orExpr struct {
+	left     Expr
+	right    Expr
+	funcType Type
+}
+
+// String - returns string representation of this function.
+func (f *orExpr) String() string {
+	return fmt.Sprintf("(%v OR %v)", f.left, f.right)
+}
+
+// Call - evaluates this function for given arg values and returns result as Value.
+func (f *orExpr) Eval(record Record) (*Value, error) {
+	leftValue, err := f.left.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if f.funcType == aggregateFunction {
+		_, err = f.right.Eval(record)
+		return nil, err
+	}
+
+	if leftValue.Type() != Bool {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to bool", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	if leftValue.BoolValue() {
+		return leftValue, nil
+	}
+
+	rightValue, err := f.right.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+	if rightValue.Type() != Bool {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to bool", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return rightValue, nil
+}
+
+// AggregateValue - returns aggregated value.
+func (f *orExpr) AggregateValue() (*Value, error) {
+	if f.funcType != aggregateFunction {
+		err := fmt.Errorf("%v is not aggreate expression", f)
+		return nil, errExternalEvalException(err)
+	}
+
+	leftValue, err := f.left.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+	if leftValue.Type() != Bool {
+		err := fmt.Errorf("%v: left side expression evaluated to %v; not to bool", f, leftValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	if leftValue.BoolValue() {
+		return leftValue, nil
+	}
+
+	rightValue, err := f.right.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+	if rightValue.Type() != Bool {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to bool", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return rightValue, nil
+}
+
+// Type - returns logicalFunction or aggregateFunction type.
+func (f *orExpr) Type() Type {
+	return f.funcType
+}
+
+// ReturnType - returns Bool as return type.
+func (f *orExpr) ReturnType() Type {
+	return Bool
+}
+
+// newOrExpr - creates new OR logical function.
+func newOrExpr(left, right Expr) (*orExpr, error) {
+	if !left.ReturnType().isBoolKind() {
+		err := fmt.Errorf("operator OR: left side expression %v evaluate to %v, not bool", left, left.ReturnType())
+		return nil, errInvalidDataType(err)
+	}
+
+	if !right.ReturnType().isBoolKind() {
+		err := fmt.Errorf("operator OR: right side expression %v evaluate to %v; not bool", right, right.ReturnType())
+		return nil, errInvalidDataType(err)
+	}
+
+	funcType := logicalFunction
+	if left.Type() == aggregateFunction || right.Type() == aggregateFunction {
+		funcType = aggregateFunction
+		if left.Type() == column {
+			err := fmt.Errorf("operator OR: left side expression %v return type %v is incompatible for aggregate evaluation", left, left.Type())
+			return nil, errUnsupportedSQLOperation(err)
+		}
+
+		if right.Type() == column {
+			err := fmt.Errorf("operator OR: right side expression %v return type %v is incompatible for aggregate evaluation", right, right.Type())
+			return nil, errUnsupportedSQLOperation(err)
+		}
+	}
+
+	return &orExpr{
+		left:     left,
+		right:    right,
+		funcType: funcType,
+	}, nil
+}
+
+// notExpr - logical NOT function.
+type notExpr struct {
+	right    Expr
+	funcType Type
+}
+
+// String - returns string representation of this function.
+func (f *notExpr) String() string {
+	return fmt.Sprintf("(%v)", f.right)
+}
+
+// Call - evaluates this function for given arg values and returns result as Value.
+func (f *notExpr) Eval(record Record) (*Value, error) {
+	rightValue, err := f.right.Eval(record)
+	if err != nil {
+		return nil, err
+	}
+
+	if f.funcType == aggregateFunction {
+		return nil, nil
+	}
+
+	if rightValue.Type() != Bool {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to bool", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(!rightValue.BoolValue()), nil
+}
+
+// AggregateValue - returns aggregated value.
+func (f *notExpr) AggregateValue() (*Value, error) {
+	if f.funcType != aggregateFunction {
+		err := fmt.Errorf("%v is not aggreate expression", f)
+		return nil, errExternalEvalException(err)
+	}
+
+	rightValue, err := f.right.AggregateValue()
+	if err != nil {
+		return nil, err
+	}
+	if rightValue.Type() != Bool {
+		err := fmt.Errorf("%v: right side expression evaluated to %v; not to bool", f, rightValue.Type())
+		return nil, errExternalEvalException(err)
+	}
+
+	return NewBool(!rightValue.BoolValue()), nil
+}
+
+// Type - returns logicalFunction or aggregateFunction type.
+func (f *notExpr) Type() Type {
+	return f.funcType
+}
+
+// ReturnType - returns Bool as return type.
+func (f *notExpr) ReturnType() Type {
+	return Bool
+}
+
+// newNotExpr - creates new NOT logical function.
+func newNotExpr(right Expr) (*notExpr, error) {
+	if !right.ReturnType().isBoolKind() {
+		err := fmt.Errorf("operator NOT: right side expression %v evaluate to %v; not bool", right, right.ReturnType())
+		return nil, errInvalidDataType(err)
+	}
+
+	funcType := logicalFunction
+	if right.Type() == aggregateFunction {
+		funcType = aggregateFunction
+	}
+
+	return &notExpr{
+		right:    right,
+		funcType: funcType,
+	}, nil
+}

pkg/s3select/sql/record.go

@@ -0,0 +1,25 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+// Record - is a type containing columns and their values.
+type Record interface {
+	Get(name string) (*Value, error)
+	Set(name string, value *Value) error
+	MarshalCSV(fieldDelimiter rune) ([]byte, error)
+	MarshalJSON() ([]byte, error)
+}

pkg/s3select/sql/sql.go

@@ -0,0 +1,529 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/xwb1989/sqlparser"
+)
+
+func getColumnName(colName *sqlparser.ColName) string {
+	columnName := colName.Qualifier.Name.String()
+	if qualifier := colName.Qualifier.Qualifier.String(); qualifier != "" {
+		columnName = qualifier + "." + columnName
+	}
+
+	if columnName == "" {
+		columnName = colName.Name.String()
+	} else {
+		columnName = columnName + "." + colName.Name.String()
+	}
+
+	return columnName
+}
+
+func newLiteralExpr(parserExpr sqlparser.Expr, tableAlias string) (Expr, error) {
+	switch parserExpr.(type) {
+	case *sqlparser.NullVal:
+		return newValueExpr(NewNull()), nil
+	case sqlparser.BoolVal:
+		return newValueExpr(NewBool((bool(parserExpr.(sqlparser.BoolVal))))), nil
+	case *sqlparser.SQLVal:
+		sqlValue := parserExpr.(*sqlparser.SQLVal)
+		value, err := NewValue(sqlValue)
+		if err != nil {
+			return nil, err
+		}
+		return newValueExpr(value), nil
+	case *sqlparser.ColName:
+		columnName := getColumnName(parserExpr.(*sqlparser.ColName))
+		if tableAlias != "" {
+			if !strings.HasPrefix(columnName, tableAlias+".") {
+				err := fmt.Errorf("column name %v does not start with table alias %v", columnName, tableAlias)
+				return nil, errInvalidKeyPath(err)
+			}
+			columnName = strings.TrimPrefix(columnName, tableAlias+".")
+		}
+
+		return newColumnExpr(columnName), nil
+	case sqlparser.ValTuple:
+		var valueType Type
+		var values []*Value
+		for i, valExpr := range parserExpr.(sqlparser.ValTuple) {
+			sqlVal, ok := valExpr.(*sqlparser.SQLVal)
+			if !ok {
+				return nil, errParseInvalidTypeParam(fmt.Errorf("value %v in Tuple should be primitive value", i+1))
+			}
+
+			val, err := NewValue(sqlVal)
+			if err != nil {
+				return nil, err
+			}
+
+			if i == 0 {
+				valueType = val.Type()
+			} else if valueType != val.Type() {
+				return nil, errParseInvalidTypeParam(fmt.Errorf("mixed value type is not allowed in Tuple"))
+			}
+
+			values = append(values, val)
+		}
+
+		return newValueExpr(NewArray(values)), nil
+	}
+
+	return nil, nil
+}
+
+func isExprToComparisonExpr(parserExpr *sqlparser.IsExpr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	leftExpr, err := newExpr(parserExpr.Expr, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := newComparisonExpr(ComparisonOperator(parserExpr.Operator), leftExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	if !leftExpr.Type().isBase() {
+		return f, nil
+	}
+
+	value, err := f.Eval(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return newValueExpr(value), nil
+}
+
+func rangeCondToComparisonFunc(parserExpr *sqlparser.RangeCond, tableAlias string, isSelectExpr bool) (Expr, error) {
+	leftExpr, err := newExpr(parserExpr.Left, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	fromExpr, err := newExpr(parserExpr.From, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	toExpr, err := newExpr(parserExpr.To, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := newComparisonExpr(ComparisonOperator(parserExpr.Operator), leftExpr, fromExpr, toExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	if !leftExpr.Type().isBase() || !fromExpr.Type().isBase() || !toExpr.Type().isBase() {
+		return f, nil
+	}
+
+	value, err := f.Eval(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return newValueExpr(value), nil
+}
+
+func toComparisonExpr(parserExpr *sqlparser.ComparisonExpr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	leftExpr, err := newExpr(parserExpr.Left, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	rightExpr, err := newExpr(parserExpr.Right, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := newComparisonExpr(ComparisonOperator(parserExpr.Operator), leftExpr, rightExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	if !leftExpr.Type().isBase() || !rightExpr.Type().isBase() {
+		return f, nil
+	}
+
+	value, err := f.Eval(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return newValueExpr(value), nil
+}
+
+func toArithExpr(parserExpr *sqlparser.BinaryExpr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	leftExpr, err := newExpr(parserExpr.Left, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	rightExpr, err := newExpr(parserExpr.Right, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := newArithExpr(ArithOperator(parserExpr.Operator), leftExpr, rightExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	if !leftExpr.Type().isBase() || !rightExpr.Type().isBase() {
+		return f, nil
+	}
+
+	value, err := f.Eval(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return newValueExpr(value), nil
+}
+
+func toFuncExpr(parserExpr *sqlparser.FuncExpr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	funcName := strings.ToUpper(parserExpr.Name.String())
+	if !isSelectExpr && isAggregateFuncName(funcName) {
+		return nil, errUnsupportedSQLOperation(fmt.Errorf("%v() must be used in select expression", funcName))
+	}
+	funcs, aggregatedExprFound, err := newSelectExprs(parserExpr.Exprs, tableAlias)
+	if err != nil {
+		return nil, err
+	}
+
+	if aggregatedExprFound {
+		return nil, errIncorrectSQLFunctionArgumentType(fmt.Errorf("%v(): aggregated expression must not be used as argument", funcName))
+	}
+
+	return newFuncExpr(FuncName(funcName), funcs...)
+}
+
+func toAndExpr(parserExpr *sqlparser.AndExpr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	leftExpr, err := newExpr(parserExpr.Left, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	rightExpr, err := newExpr(parserExpr.Right, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := newAndExpr(leftExpr, rightExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	if leftExpr.Type() != Bool || rightExpr.Type() != Bool {
+		return f, nil
+	}
+
+	value, err := f.Eval(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return newValueExpr(value), nil
+}
+
+func toOrExpr(parserExpr *sqlparser.OrExpr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	leftExpr, err := newExpr(parserExpr.Left, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	rightExpr, err := newExpr(parserExpr.Right, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := newOrExpr(leftExpr, rightExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	if leftExpr.Type() != Bool || rightExpr.Type() != Bool {
+		return f, nil
+	}
+
+	value, err := f.Eval(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return newValueExpr(value), nil
+}
+
+func toNotExpr(parserExpr *sqlparser.NotExpr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	rightExpr, err := newExpr(parserExpr.Expr, tableAlias, isSelectExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := newNotExpr(rightExpr)
+	if err != nil {
+		return nil, err
+	}
+
+	if rightExpr.Type() != Bool {
+		return f, nil
+	}
+
+	value, err := f.Eval(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return newValueExpr(value), nil
+}
+
+func newExpr(parserExpr sqlparser.Expr, tableAlias string, isSelectExpr bool) (Expr, error) {
+	f, err := newLiteralExpr(parserExpr, tableAlias)
+	if err != nil {
+		return nil, err
+	}
+
+	if f != nil {
+		return f, nil
+	}
+
+	switch parserExpr.(type) {
+	case *sqlparser.ParenExpr:
+		return newExpr(parserExpr.(*sqlparser.ParenExpr).Expr, tableAlias, isSelectExpr)
+	case *sqlparser.IsExpr:
+		return isExprToComparisonExpr(parserExpr.(*sqlparser.IsExpr), tableAlias, isSelectExpr)
+	case *sqlparser.RangeCond:
+		return rangeCondToComparisonFunc(parserExpr.(*sqlparser.RangeCond), tableAlias, isSelectExpr)
+	case *sqlparser.ComparisonExpr:
+		return toComparisonExpr(parserExpr.(*sqlparser.ComparisonExpr), tableAlias, isSelectExpr)
+	case *sqlparser.BinaryExpr:
+		return toArithExpr(parserExpr.(*sqlparser.BinaryExpr), tableAlias, isSelectExpr)
+	case *sqlparser.FuncExpr:
+		return toFuncExpr(parserExpr.(*sqlparser.FuncExpr), tableAlias, isSelectExpr)
+	case *sqlparser.AndExpr:
+		return toAndExpr(parserExpr.(*sqlparser.AndExpr), tableAlias, isSelectExpr)
+	case *sqlparser.OrExpr:
+		return toOrExpr(parserExpr.(*sqlparser.OrExpr), tableAlias, isSelectExpr)
+	case *sqlparser.NotExpr:
+		return toNotExpr(parserExpr.(*sqlparser.NotExpr), tableAlias, isSelectExpr)
+	}
+
+	return nil, errParseUnsupportedSyntax(fmt.Errorf("unknown expression type %T; %v", parserExpr, parserExpr))
+}
+
+func newSelectExprs(parserSelectExprs []sqlparser.SelectExpr, tableAlias string) ([]Expr, bool, error) {
+	var funcs []Expr
+	starExprFound := false
+	aggregatedExprFound := false
+
+	for _, selectExpr := range parserSelectExprs {
+		switch selectExpr.(type) {
+		case *sqlparser.AliasedExpr:
+			if starExprFound {
+				return nil, false, errParseAsteriskIsNotAloneInSelectList(nil)
+			}
+
+			aliasedExpr := selectExpr.(*sqlparser.AliasedExpr)
+			f, err := newExpr(aliasedExpr.Expr, tableAlias, true)
+			if err != nil {
+				return nil, false, err
+			}
+
+			if f.Type() == aggregateFunction {
+				if !aggregatedExprFound {
+					aggregatedExprFound = true
+					if len(funcs) > 0 {
+						return nil, false, errParseUnsupportedSyntax(fmt.Errorf("expression must not mixed with aggregated expression"))
+					}
+				}
+			} else if aggregatedExprFound {
+				return nil, false, errParseUnsupportedSyntax(fmt.Errorf("expression must not mixed with aggregated expression"))
+			}
+
+			alias := aliasedExpr.As.String()
+			if alias != "" {
+				f = newAliasExpr(alias, f)
+			}
+
+			funcs = append(funcs, f)
+		case *sqlparser.StarExpr:
+			if starExprFound {
+				err := fmt.Errorf("only single star expression allowed")
+				return nil, false, errParseInvalidContextForWildcardInSelectList(err)
+			}
+			starExprFound = true
+			funcs = append(funcs, newStarExpr())
+		default:
+			return nil, false, errParseUnsupportedSyntax(fmt.Errorf("unknown select expression %v", selectExpr))
+		}
+	}
+
+	return funcs, aggregatedExprFound, nil
+}
+
+// Select - SQL Select statement.
+type Select struct {
+	tableName           string
+	tableAlias          string
+	selectExprs         []Expr
+	aggregatedExprFound bool
+	whereExpr           Expr
+}
+
+// TableAlias - returns table alias name.
+func (statement *Select) TableAlias() string {
+	return statement.tableAlias
+}
+
+// IsSelectAll - returns whether '*' is used in select expression or not.
+func (statement *Select) IsSelectAll() bool {
+	if len(statement.selectExprs) == 1 {
+		_, ok := statement.selectExprs[0].(*starExpr)
+		return ok
+	}
+
+	return false
+}
+
+// IsAggregated - returns whether aggregated functions are used in select expression or not.
+func (statement *Select) IsAggregated() bool {
+	return statement.aggregatedExprFound
+}
+
+// AggregateResult - returns aggregate result as record.
+func (statement *Select) AggregateResult(output Record) error {
+	if !statement.aggregatedExprFound {
+		return nil
+	}
+
+	for i, expr := range statement.selectExprs {
+		value, err := expr.AggregateValue()
+		if err != nil {
+			return err
+		}
+		if value == nil {
+			return errInternalError(fmt.Errorf("%v returns <nil> for AggregateValue()", expr))
+		}
+
+		name := fmt.Sprintf("_%v", i+1)
+		if _, ok := expr.(*aliasExpr); ok {
+			name = expr.(*aliasExpr).alias
+		}
+
+		if err = output.Set(name, value); err != nil {
+			return errInternalError(fmt.Errorf("error occurred to store value %v for %v; %v", value, name, err))
+		}
+	}
+
+	return nil
+}
+
+// Eval - evaluates this Select expressions for given record.
+func (statement *Select) Eval(input, output Record) (Record, error) {
+	if statement.whereExpr != nil {
+		value, err := statement.whereExpr.Eval(input)
+		if err != nil {
+			return nil, err
+		}
+
+		if value == nil || value.valueType != Bool {
+			err = fmt.Errorf("WHERE expression %v returns invalid bool value %v", statement.whereExpr, value)
+			return nil, errInternalError(err)
+		}
+
+		if !value.BoolValue() {
+			return nil, nil
+		}
+	}
+
+	// Call selectExprs
+	for i, expr := range statement.selectExprs {
+		value, err := expr.Eval(input)
+		if err != nil {
+			return nil, err
+		}
+
+		if statement.aggregatedExprFound {
+			continue
+		}
+
+		name := fmt.Sprintf("_%v", i+1)
+		switch expr.(type) {
+		case *starExpr:
+			return value.recordValue(), nil
+		case *aliasExpr:
+			name = expr.(*aliasExpr).alias
+		case *columnExpr:
+			name = expr.(*columnExpr).name
+		}
+
+		if err = output.Set(name, value); err != nil {
+			return nil, errInternalError(fmt.Errorf("error occurred to store value %v for %v; %v", value, name, err))
+		}
+	}
+
+	return output, nil
+}
+
+// NewSelect - creates new Select by parsing sql.
+func NewSelect(sql string) (*Select, error) {
+	stmt, err := sqlparser.Parse(sql)
+	if err != nil {
+		return nil, errUnsupportedSQLStructure(err)
+	}
+
+	selectStmt, ok := stmt.(*sqlparser.Select)
+	if !ok {
+		return nil, errParseUnsupportedSelect(fmt.Errorf("unsupported SQL statement %v", sql))
+	}
+
+	var tableName, tableAlias string
+	for _, fromExpr := range selectStmt.From {
+		tableExpr := fromExpr.(*sqlparser.AliasedTableExpr)
+		tableName = tableExpr.Expr.(sqlparser.TableName).Name.String()
+		tableAlias = tableExpr.As.String()
+	}
+
+	selectExprs, aggregatedExprFound, err := newSelectExprs(selectStmt.SelectExprs, tableAlias)
+	if err != nil {
+		return nil, err
+	}
+
+	var whereExpr Expr
+	if selectStmt.Where != nil {
+		whereExpr, err = newExpr(selectStmt.Where.Expr, tableAlias, false)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return &Select{
+		tableName:           tableName,
+		tableAlias:          tableAlias,
+		selectExprs:         selectExprs,
+		aggregatedExprFound: aggregatedExprFound,
+		whereExpr:           whereExpr,
+	}, nil
+}

pkg/s3select/sql/type.go

@@ -0,0 +1,118 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+// Type - value type.
+type Type string
+
+const (
+	// Null - represents NULL value type.
+	Null Type = "null"
+
+	// Bool - represents boolean value type.
+	Bool Type = "bool"
+
+	// Int - represents integer value type.
+	Int Type = "int"
+
+	// Float - represents floating point value type.
+	Float Type = "float"
+
+	// String - represents string value type.
+	String Type = "string"
+
+	// Timestamp - represents time value type.
+	Timestamp Type = "timestamp"
+
+	// Array - represents array of values where each value type is one of above.
+	Array Type = "array"
+
+	column             Type = "column"
+	record             Type = "record"
+	function           Type = "function"
+	aggregateFunction  Type = "aggregatefunction"
+	arithmeticFunction Type = "arithmeticfunction"
+	comparisonFunction Type = "comparisonfunction"
+	logicalFunction    Type = "logicalfunction"
+
+	// Integer            Type = "integer" // Same as Int
+	// Decimal            Type = "decimal" // Same as Float
+	// Numeric            Type = "numeric" // Same as Float
+)
+
+func (t Type) isBase() bool {
+	switch t {
+	case Null, Bool, Int, Float, String, Timestamp:
+		return true
+	}
+
+	return false
+}
+
+func (t Type) isBaseKind() bool {
+	switch t {
+	case Null, Bool, Int, Float, String, Timestamp, column:
+		return true
+	}
+
+	return false
+}
+
+func (t Type) isNumber() bool {
+	switch t {
+	case Int, Float:
+		return true
+	}
+
+	return false
+}
+
+func (t Type) isNumberKind() bool {
+	switch t {
+	case Int, Float, column:
+		return true
+	}
+
+	return false
+}
+
+func (t Type) isIntKind() bool {
+	switch t {
+	case Int, column:
+		return true
+	}
+
+	return false
+}
+
+func (t Type) isBoolKind() bool {
+	switch t {
+	case Bool, column:
+		return true
+	}
+
+	return false
+}
+
+func (t Type) isStringKind() bool {
+	switch t {
+	case String, column:
+		return true
+	}
+
+	return false
+}

pkg/s3select/sql/value.go

@@ -0,0 +1,223 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/xwb1989/sqlparser"
+)
+
+// Value - represents any primitive value of bool, int, float, string and time.
+type Value struct {
+	value     interface{}
+	valueType Type
+}
+
+// String - represents value as string.
+func (value *Value) String() string {
+	if value.value == nil {
+		if value.valueType == Null {
+			return "NULL"
+		}
+
+		return "<nil>"
+	}
+
+	switch value.valueType {
+	case String:
+		return fmt.Sprintf("'%v'", value.value)
+	case Array:
+		var valueStrings []string
+		for _, v := range value.value.([]*Value) {
+			valueStrings = append(valueStrings, fmt.Sprintf("%v", v))
+		}
+		return fmt.Sprintf("(%v)", strings.Join(valueStrings, ","))
+	}
+
+	return fmt.Sprintf("%v", value.value)
+}
+
+// CSVString - encodes to CSV string.
+func (value *Value) CSVString() string {
+	return fmt.Sprintf("%v", value.value)
+}
+
+// MarshalJSON - encodes to JSON data.
+func (value *Value) MarshalJSON() ([]byte, error) {
+	return json.Marshal(value.value)
+}
+
+// BoolValue - returns underlying bool value. It panics if value is not Bool type.
+func (value *Value) BoolValue() bool {
+	if value.valueType == Bool {
+		return value.value.(bool)
+	}
+
+	panic(fmt.Sprintf("requested bool value but found %T type", value.value))
+}
+
+// IntValue - returns underlying int value. It panics if value is not Int type.
+func (value *Value) IntValue() int64 {
+	if value.valueType == Int {
+		return value.value.(int64)
+	}
+
+	panic(fmt.Sprintf("requested int value but found %T type", value.value))
+}
+
+// FloatValue - returns underlying int/float value as float64. It panics if value is not Int/Float type.
+func (value *Value) FloatValue() float64 {
+	switch value.valueType {
+	case Int:
+		return float64(value.value.(int64))
+	case Float:
+		return value.value.(float64)
+	}
+
+	panic(fmt.Sprintf("requested float value but found %T type", value.value))
+}
+
+// StringValue - returns underlying string value. It panics if value is not String type.
+func (value *Value) StringValue() string {
+	if value.valueType == String {
+		return value.value.(string)
+	}
+
+	panic(fmt.Sprintf("requested string value but found %T type", value.value))
+}
+
+// TimeValue - returns underlying time value. It panics if value is not Timestamp type.
+func (value *Value) TimeValue() time.Time {
+	if value.valueType == Timestamp {
+		return value.value.(time.Time)
+	}
+
+	panic(fmt.Sprintf("requested time value but found %T type", value.value))
+}
+
+// ArrayValue - returns underlying value array. It panics if value is not Array type.
+func (value *Value) ArrayValue() []*Value {
+	if value.valueType == Array {
+		return value.value.([]*Value)
+	}
+
+	panic(fmt.Sprintf("requested array value but found %T type", value.value))
+}
+
+func (value *Value) recordValue() Record {
+	if value.valueType == record {
+		return value.value.(Record)
+	}
+
+	panic(fmt.Sprintf("requested record value but found %T type", value.value))
+}
+
+// Type - returns value type.
+func (value *Value) Type() Type {
+	return value.valueType
+}
+
+// Value - returns underneath value interface.
+func (value *Value) Value() interface{} {
+	return value.value
+}
+
+// NewNull - creates new null value.
+func NewNull() *Value {
+	return &Value{nil, Null}
+}
+
+// NewBool - creates new Bool value of b.
+func NewBool(b bool) *Value {
+	return &Value{b, Bool}
+}
+
+// NewInt - creates new Int value of i.
+func NewInt(i int64) *Value {
+	return &Value{i, Int}
+}
+
+// NewFloat - creates new Float value of f.
+func NewFloat(f float64) *Value {
+	return &Value{f, Float}
+}
+
+// NewString - creates new Sring value of s.
+func NewString(s string) *Value {
+	return &Value{s, String}
+}
+
+// NewTime - creates new Time value of t.
+func NewTime(t time.Time) *Value {
+	return &Value{t, Timestamp}
+}
+
+// NewArray - creates new Array value of values.
+func NewArray(values []*Value) *Value {
+	return &Value{values, Array}
+}
+
+func newRecordValue(r Record) *Value {
+	return &Value{r, record}
+}
+
+// NewValue - creates new Value from SQLVal v.
+func NewValue(v *sqlparser.SQLVal) (*Value, error) {
+	switch v.Type {
+	case sqlparser.StrVal:
+		return NewString(string(v.Val)), nil
+	case sqlparser.IntVal:
+		i64, err := strconv.ParseInt(string(v.Val), 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		return NewInt(i64), nil
+	case sqlparser.FloatVal:
+		f64, err := strconv.ParseFloat(string(v.Val), 64)
+		if err != nil {
+			return nil, err
+		}
+		return NewFloat(f64), nil
+	case sqlparser.HexNum: // represented as 0xDD
+		i64, err := strconv.ParseInt(string(v.Val), 16, 64)
+		if err != nil {
+			return nil, err
+		}
+		return NewInt(i64), nil
+	case sqlparser.HexVal: // represented as X'0DD'
+		i64, err := strconv.ParseInt(string(v.Val), 16, 64)
+		if err != nil {
+			return nil, err
+		}
+		return NewInt(i64), nil
+	case sqlparser.BitVal: // represented as B'00'
+		i64, err := strconv.ParseInt(string(v.Val), 2, 64)
+		if err != nil {
+			return nil, err
+		}
+		return NewInt(i64), nil
+	case sqlparser.ValArg:
+		// FIXME: the format is unknown and not sure how to handle it.
+	}
+
+	return nil, fmt.Errorf("unknown SQL value %v; %v ", v, v.Type)
+}

pkg/s3select/unused-errors.go

@@ -0,0 +1,642 @@
+// +build ignore
+
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package s3select
+
+///////////////////////////////////////////////////////////////////////
+//
+//             Validation errors.
+//
+///////////////////////////////////////////////////////////////////////
+func errExpressionTooLong(err error) *s3Error {
+	return &s3Error{
+		code:       "ExpressionTooLong",
+		message:    "The SQL expression is too long: The maximum byte-length for the SQL expression is 256 KB.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errColumnTooLong(err error) *s3Error {
+	return &s3Error{
+		code:       "ColumnTooLong",
+		message:    "The length of a column in the result is greater than maxCharsPerColumn of 1 MB.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errOverMaxColumn(err error) *s3Error {
+	return &s3Error{
+		code:       "OverMaxColumn",
+		message:    "The number of columns in the result is greater than the maximum allowable number of columns.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errOverMaxRecordSize(err error) *s3Error {
+	return &s3Error{
+		code:       "OverMaxRecordSize",
+		message:    "The length of a record in the input or result is greater than maxCharsPerRecord of 1 MB.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidColumnIndex(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidColumnIndex",
+		message:    "Column index in the SQL expression is invalid.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidTextEncoding(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidTextEncoding",
+		message:    "Invalid encoding type. Only UTF-8 encoding is supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidTableAlias(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidTableAlias",
+		message:    "The SQL expression contains an invalid table alias.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errUnsupportedSyntax(err error) *s3Error {
+	return &s3Error{
+		code:       "UnsupportedSyntax",
+		message:    "Encountered invalid syntax.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errAmbiguousFieldName(err error) *s3Error {
+	return &s3Error{
+		code:       "AmbiguousFieldName",
+		message:    "Field name matches to multiple fields in the file. Check the SQL expression and the file, and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errIntegerOverflow(err error) *s3Error {
+	return &s3Error{
+		code:       "IntegerOverflow",
+		message:    "Integer overflow or underflow in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errIllegalSQLFunctionArgument(err error) *s3Error {
+	return &s3Error{
+		code:       "IllegalSqlFunctionArgument",
+		message:    "Illegal argument was used in the SQL function.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errMultipleDataSourcesUnsupported(err error) *s3Error {
+	return &s3Error{
+		code:       "MultipleDataSourcesUnsupported",
+		message:    "Multiple data sources are not supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errMissingHeaders(err error) *s3Error {
+	return &s3Error{
+		code:       "MissingHeaders",
+		message:    "Some headers in the query are missing from the file. Check the file and try again.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errUnrecognizedFormatException(err error) *s3Error {
+	return &s3Error{
+		code:       "UnrecognizedFormatException",
+		message:    "Encountered an invalid record type.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+//
+//                      SQL parsing errors.
+//
+//////////////////////////////////////////////////////////////////////////////////////
+func errLexerInvalidChar(err error) *s3Error {
+	return &s3Error{
+		code:       "LexerInvalidChar",
+		message:    "The SQL expression contains an invalid character.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errLexerInvalidOperator(err error) *s3Error {
+	return &s3Error{
+		code:       "LexerInvalidOperator",
+		message:    "The SQL expression contains an invalid literal.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errLexerInvalidLiteral(err error) *s3Error {
+	return &s3Error{
+		code:       "LexerInvalidLiteral",
+		message:    "The SQL expression contains an invalid operator.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errLexerInvalidIONLiteral(err error) *s3Error {
+	return &s3Error{
+		code:       "LexerInvalidIONLiteral",
+		message:    "The SQL expression contains an invalid operator.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedDatePart(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedDatePart",
+		message:    "Did not find the expected date part in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedKeyword(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedKeyword",
+		message:    "Did not find the expected keyword in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedTokenType(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedTokenType",
+		message:    "Did not find the expected token in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpected2TokenTypes(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpected2TokenTypes",
+		message:    "Did not find the expected token in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedNumber(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedNumber",
+		message:    "Did not find the expected number in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedRightParenBuiltinFunctionCall(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedRightParenBuiltinFunctionCall",
+		message:    "Did not find the expected right parenthesis character in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedTypeName(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedTypeName",
+		message:    "Did not find the expected type name in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedWhenClause(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedWhenClause",
+		message:    "Did not find the expected WHEN clause in the SQL expression. CASE is not supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedToken(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedToken",
+		message:    "The SQL expression contains an unsupported token.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedLiteralsGroupBy(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedLiteralsGroupBy",
+		message:    "The SQL expression contains an unsupported use of GROUP BY.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedMember(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedMember",
+		message:    "The SQL expression contains an unsupported use of MEMBER.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedCase(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedCase",
+		message:    "The SQL expression contains an unsupported use of CASE.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedCaseClause(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedCaseClause",
+		message:    "The SQL expression contains an unsupported use of CASE.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedAlias(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedAlias",
+		message:    "The SQL expression contains an unsupported use of ALIAS.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseInvalidPathComponent(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseInvalidPathComponent",
+		message:    "The SQL expression contains an invalid path component.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseMissingIdentAfterAt(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseMissingIdentAfterAt",
+		message:    "Did not find the expected identifier after the @ symbol in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnexpectedOperator(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnexpectedOperator",
+		message:    "The SQL expression contains an unexpected operator.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnexpectedTerm(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnexpectedTerm",
+		message:    "The SQL expression contains an unexpected term.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnexpectedToken(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnexpectedToken",
+		message:    "The SQL expression contains an unexpected token.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnExpectedKeyword(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnExpectedKeyword",
+		message:    "The SQL expression contains an unexpected keyword.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedExpression(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedExpression",
+		message:    "Did not find the expected SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedLeftParenAfterCast(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedLeftParenAfterCast",
+		message:    "Did not find the expected left parenthesis after CAST in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedLeftParenValueConstructor(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedLeftParenValueConstructor",
+		message:    "Did not find expected the left parenthesis in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedLeftParenBuiltinFunctionCall(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedLeftParenBuiltinFunctionCall",
+		message:    "Did not find the expected left parenthesis in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedArgumentDelimiter(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedArgumentDelimiter",
+		message:    "Did not find the expected argument delimiter in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseCastArity(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseCastArity",
+		message:    "The SQL expression CAST has incorrect arity.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseEmptySelect(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseEmptySelect",
+		message:    "The SQL expression contains an empty SELECT.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseSelectMissingFrom(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseSelectMissingFrom",
+		message:    "The SQL expression contains a missing FROM after SELECT list.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedIdentForGroupName(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedIdentForGroupName",
+		message:    "GROUP is not supported in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedIdentForAlias(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedIdentForAlias",
+		message:    "Did not find the expected identifier for the alias in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseUnsupportedCallWithStar(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseUnsupportedCallWithStar",
+		message:    "Only COUNT with (*) as a parameter is supported in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseMalformedJoin(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseMalformedJoin",
+		message:    "JOIN is not supported in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseExpectedIdentForAt(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseExpectedIdentForAt",
+		message:    "Did not find the expected identifier for AT name in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errParseCannotMixSqbAndWildcardInSelectList(err error) *s3Error {
+	return &s3Error{
+		code:       "ParseCannotMixSqbAndWildcardInSelectList",
+		message:    "Cannot mix [] and * in the same expression in a SELECT list in SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+//
+//                             CAST() related errors.
+//
+//////////////////////////////////////////////////////////////////////////////////////
+func errCastFailed(err error) *s3Error {
+	return &s3Error{
+		code:       "CastFailed",
+		message:    "Attempt to convert from one data type to another using CAST failed in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errInvalidCast(err error) *s3Error {
+	return &s3Error{
+		code:       "InvalidCast",
+		message:    "Attempt to convert from one data type to another using CAST failed in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorInvalidTimestampFormatPattern(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorInvalidTimestampFormatPattern",
+		message:    "Invalid time stamp format string in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorInvalidTimestampFormatPatternAdditionalFieldsRequired(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorInvalidTimestampFormatPattern",
+		message:    "Time stamp format pattern requires additional fields in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorInvalidTimestampFormatPatternSymbolForParsing(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorInvalidTimestampFormatPatternSymbolForParsing",
+		message:    "Time stamp format pattern contains a valid format symbol that cannot be applied to time stamp parsing in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorTimestampFormatPatternDuplicateFields(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorTimestampFormatPatternDuplicateFields",
+		message:    "Time stamp format pattern contains multiple format specifiers representing the time stamp field in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorTimestampFormatPatternHourClockAmPmMismatch(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorTimestampFormatPatternHourClockAmPmMismatch",
+		message:    "Time stamp format pattern contains a 12-hour hour of day format symbol but doesn't also contain an AM/PM field, or it contains a 24-hour hour of day format specifier and contains an AM/PM field in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorUnterminatedTimestampFormatPatternToken(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorUnterminatedTimestampFormatPatternToken",
+		message:    "Time stamp format pattern contains unterminated token in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorInvalidTimestampFormatPatternToken(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorInvalidTimestampFormatPatternToken",
+		message:    "Time stamp format pattern contains an invalid token in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errEvaluatorInvalidTimestampFormatPatternSymbol(err error) *s3Error {
+	return &s3Error{
+		code:       "EvaluatorInvalidTimestampFormatPatternSymbol",
+		message:    "Time stamp format pattern contains an invalid symbol in the SQL expression.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+//               Generic S3 HTTP handler errors.
+//
+////////////////////////////////////////////////////////////////////////
+func errBusy(err error) *s3Error {
+	return &s3Error{
+		code:       "Busy",
+		message:    "The service is unavailable. Please retry.",
+		statusCode: 503,
+		cause:      err,
+	}
+}
+
+func errUnauthorizedAccess(err error) *s3Error {
+	return &s3Error{
+		code:       "UnauthorizedAccess",
+		message:    "You are not authorized to perform this operation",
+		statusCode: 401,
+		cause:      err,
+	}
+}
+
+func errEmptyRequestBody(err error) *s3Error {
+	return &s3Error{
+		code:       "EmptyRequestBody",
+		message:    "Request body cannot be empty.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errUnsupportedRangeHeader(err error) *s3Error {
+	return &s3Error{
+		code:       "UnsupportedRangeHeader",
+		message:    "Range header is not supported for this operation.",
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errUnsupportedStorageClass(err error) *s3Error {
+	return &s3Error{
+		code:       "UnsupportedStorageClass",
+		message:    "Encountered an invalid storage class. Only STANDARD, STANDARD_IA, and ONEZONE_IA storage classes are supported.",
+		statusCode: 400,
+		cause:      err,
+	}
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/application_exception.go

@@ -0,0 +1,164 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+const (
+	UNKNOWN_APPLICATION_EXCEPTION  = 0
+	UNKNOWN_METHOD                 = 1
+	INVALID_MESSAGE_TYPE_EXCEPTION = 2
+	WRONG_METHOD_NAME              = 3
+	BAD_SEQUENCE_ID                = 4
+	MISSING_RESULT                 = 5
+	INTERNAL_ERROR                 = 6
+	PROTOCOL_ERROR                 = 7
+)
+
+var defaultApplicationExceptionMessage = map[int32]string{
+	UNKNOWN_APPLICATION_EXCEPTION:  "unknown application exception",
+	UNKNOWN_METHOD:                 "unknown method",
+	INVALID_MESSAGE_TYPE_EXCEPTION: "invalid message type",
+	WRONG_METHOD_NAME:              "wrong method name",
+	BAD_SEQUENCE_ID:                "bad sequence ID",
+	MISSING_RESULT:                 "missing result",
+	INTERNAL_ERROR:                 "unknown internal error",
+	PROTOCOL_ERROR:                 "unknown protocol error",
+}
+
+// Application level Thrift exception
+type TApplicationException interface {
+	TException
+	TypeId() int32
+	Read(iprot TProtocol) error
+	Write(oprot TProtocol) error
+}
+
+type tApplicationException struct {
+	message string
+	type_   int32
+}
+
+func (e tApplicationException) Error() string {
+	if e.message != "" {
+		return e.message
+	}
+	return defaultApplicationExceptionMessage[e.type_]
+}
+
+func NewTApplicationException(type_ int32, message string) TApplicationException {
+	return &tApplicationException{message, type_}
+}
+
+func (p *tApplicationException) TypeId() int32 {
+	return p.type_
+}
+
+func (p *tApplicationException) Read(iprot TProtocol) error {
+	// TODO: this should really be generated by the compiler
+	_, err := iprot.ReadStructBegin()
+	if err != nil {
+		return err
+	}
+
+	message := ""
+	type_ := int32(UNKNOWN_APPLICATION_EXCEPTION)
+
+	for {
+		_, ttype, id, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return err
+		}
+		if ttype == STOP {
+			break
+		}
+		switch id {
+		case 1:
+			if ttype == STRING {
+				if message, err = iprot.ReadString(); err != nil {
+					return err
+				}
+			} else {
+				if err = SkipDefaultDepth(iprot, ttype); err != nil {
+					return err
+				}
+			}
+		case 2:
+			if ttype == I32 {
+				if type_, err = iprot.ReadI32(); err != nil {
+					return err
+				}
+			} else {
+				if err = SkipDefaultDepth(iprot, ttype); err != nil {
+					return err
+				}
+			}
+		default:
+			if err = SkipDefaultDepth(iprot, ttype); err != nil {
+				return err
+			}
+		}
+		if err = iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return err
+	}
+
+	p.message = message
+	p.type_ = type_
+
+	return nil
+}
+
+func (p *tApplicationException) Write(oprot TProtocol) (err error) {
+	err = oprot.WriteStructBegin("TApplicationException")
+	if len(p.Error()) > 0 {
+		err = oprot.WriteFieldBegin("message", STRING, 1)
+		if err != nil {
+			return
+		}
+		err = oprot.WriteString(p.Error())
+		if err != nil {
+			return
+		}
+		err = oprot.WriteFieldEnd()
+		if err != nil {
+			return
+		}
+	}
+	err = oprot.WriteFieldBegin("type", I32, 2)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteI32(p.type_)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteFieldEnd()
+	if err != nil {
+		return
+	}
+	err = oprot.WriteFieldStop()
+	if err != nil {
+		return
+	}
+	err = oprot.WriteStructEnd()
+	return
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/binary_protocol.go

@@ -0,0 +1,509 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bytes"
+	"context"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+)
+
+type TBinaryProtocol struct {
+	trans         TRichTransport
+	origTransport TTransport
+	reader        io.Reader
+	writer        io.Writer
+	strictRead    bool
+	strictWrite   bool
+	buffer        [64]byte
+}
+
+type TBinaryProtocolFactory struct {
+	strictRead  bool
+	strictWrite bool
+}
+
+func NewTBinaryProtocolTransport(t TTransport) *TBinaryProtocol {
+	return NewTBinaryProtocol(t, false, true)
+}
+
+func NewTBinaryProtocol(t TTransport, strictRead, strictWrite bool) *TBinaryProtocol {
+	p := &TBinaryProtocol{origTransport: t, strictRead: strictRead, strictWrite: strictWrite}
+	if et, ok := t.(TRichTransport); ok {
+		p.trans = et
+	} else {
+		p.trans = NewTRichTransport(t)
+	}
+	p.reader = p.trans
+	p.writer = p.trans
+	return p
+}
+
+func NewTBinaryProtocolFactoryDefault() *TBinaryProtocolFactory {
+	return NewTBinaryProtocolFactory(false, true)
+}
+
+func NewTBinaryProtocolFactory(strictRead, strictWrite bool) *TBinaryProtocolFactory {
+	return &TBinaryProtocolFactory{strictRead: strictRead, strictWrite: strictWrite}
+}
+
+func (p *TBinaryProtocolFactory) GetProtocol(t TTransport) TProtocol {
+	return NewTBinaryProtocol(t, p.strictRead, p.strictWrite)
+}
+
+/**
+ * Writing Methods
+ */
+
+func (p *TBinaryProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
+	if p.strictWrite {
+		version := uint32(VERSION_1) | uint32(typeId)
+		e := p.WriteI32(int32(version))
+		if e != nil {
+			return e
+		}
+		e = p.WriteString(name)
+		if e != nil {
+			return e
+		}
+		e = p.WriteI32(seqId)
+		return e
+	} else {
+		e := p.WriteString(name)
+		if e != nil {
+			return e
+		}
+		e = p.WriteByte(int8(typeId))
+		if e != nil {
+			return e
+		}
+		e = p.WriteI32(seqId)
+		return e
+	}
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteMessageEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteStructBegin(name string) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteStructEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
+	e := p.WriteByte(int8(typeId))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI16(id)
+	return e
+}
+
+func (p *TBinaryProtocol) WriteFieldEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteFieldStop() error {
+	e := p.WriteByte(STOP)
+	return e
+}
+
+func (p *TBinaryProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+	e := p.WriteByte(int8(keyType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteByte(int8(valueType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteMapEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteListBegin(elemType TType, size int) error {
+	e := p.WriteByte(int8(elemType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteListEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteSetBegin(elemType TType, size int) error {
+	e := p.WriteByte(int8(elemType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteSetEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteBool(value bool) error {
+	if value {
+		return p.WriteByte(1)
+	}
+	return p.WriteByte(0)
+}
+
+func (p *TBinaryProtocol) WriteByte(value int8) error {
+	e := p.trans.WriteByte(byte(value))
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI16(value int16) error {
+	v := p.buffer[0:2]
+	binary.BigEndian.PutUint16(v, uint16(value))
+	_, e := p.writer.Write(v)
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI32(value int32) error {
+	v := p.buffer[0:4]
+	binary.BigEndian.PutUint32(v, uint32(value))
+	_, e := p.writer.Write(v)
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI64(value int64) error {
+	v := p.buffer[0:8]
+	binary.BigEndian.PutUint64(v, uint64(value))
+	_, err := p.writer.Write(v)
+	return NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) WriteDouble(value float64) error {
+	return p.WriteI64(int64(math.Float64bits(value)))
+}
+
+func (p *TBinaryProtocol) WriteString(value string) error {
+	e := p.WriteI32(int32(len(value)))
+	if e != nil {
+		return e
+	}
+	_, err := p.trans.WriteString(value)
+	return NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) WriteBinary(value []byte) error {
+	e := p.WriteI32(int32(len(value)))
+	if e != nil {
+		return e
+	}
+	_, err := p.writer.Write(value)
+	return NewTProtocolException(err)
+}
+
+/**
+ * Reading methods
+ */
+
+func (p *TBinaryProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
+	size, e := p.ReadI32()
+	if e != nil {
+		return "", typeId, 0, NewTProtocolException(e)
+	}
+	if size < 0 {
+		typeId = TMessageType(size & 0x0ff)
+		version := int64(int64(size) & VERSION_MASK)
+		if version != VERSION_1 {
+			return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Bad version in ReadMessageBegin"))
+		}
+		name, e = p.ReadString()
+		if e != nil {
+			return name, typeId, seqId, NewTProtocolException(e)
+		}
+		seqId, e = p.ReadI32()
+		if e != nil {
+			return name, typeId, seqId, NewTProtocolException(e)
+		}
+		return name, typeId, seqId, nil
+	}
+	if p.strictRead {
+		return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Missing version in ReadMessageBegin"))
+	}
+	name, e2 := p.readStringBody(size)
+	if e2 != nil {
+		return name, typeId, seqId, e2
+	}
+	b, e3 := p.ReadByte()
+	if e3 != nil {
+		return name, typeId, seqId, e3
+	}
+	typeId = TMessageType(b)
+	seqId, e4 := p.ReadI32()
+	if e4 != nil {
+		return name, typeId, seqId, e4
+	}
+	return name, typeId, seqId, nil
+}
+
+func (p *TBinaryProtocol) ReadMessageEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadStructBegin() (name string, err error) {
+	return
+}
+
+func (p *TBinaryProtocol) ReadStructEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadFieldBegin() (name string, typeId TType, seqId int16, err error) {
+	t, err := p.ReadByte()
+	typeId = TType(t)
+	if err != nil {
+		return name, typeId, seqId, err
+	}
+	if t != STOP {
+		seqId, err = p.ReadI16()
+	}
+	return name, typeId, seqId, err
+}
+
+func (p *TBinaryProtocol) ReadFieldEnd() error {
+	return nil
+}
+
+var invalidDataLength = NewTProtocolExceptionWithType(INVALID_DATA, errors.New("Invalid data length"))
+
+func (p *TBinaryProtocol) ReadMapBegin() (kType, vType TType, size int, err error) {
+	k, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	kType = TType(k)
+	v, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	vType = TType(v)
+	size32, e := p.ReadI32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+	return kType, vType, size, nil
+}
+
+func (p *TBinaryProtocol) ReadMapEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadListBegin() (elemType TType, size int, err error) {
+	b, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	elemType = TType(b)
+	size32, e := p.ReadI32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+
+	return
+}
+
+func (p *TBinaryProtocol) ReadListEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadSetBegin() (elemType TType, size int, err error) {
+	b, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	elemType = TType(b)
+	size32, e := p.ReadI32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+	return elemType, size, nil
+}
+
+func (p *TBinaryProtocol) ReadSetEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadBool() (bool, error) {
+	b, e := p.ReadByte()
+	v := true
+	if b != 1 {
+		v = false
+	}
+	return v, e
+}
+
+func (p *TBinaryProtocol) ReadByte() (int8, error) {
+	v, err := p.trans.ReadByte()
+	return int8(v), err
+}
+
+func (p *TBinaryProtocol) ReadI16() (value int16, err error) {
+	buf := p.buffer[0:2]
+	err = p.readAll(buf)
+	value = int16(binary.BigEndian.Uint16(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadI32() (value int32, err error) {
+	buf := p.buffer[0:4]
+	err = p.readAll(buf)
+	value = int32(binary.BigEndian.Uint32(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadI64() (value int64, err error) {
+	buf := p.buffer[0:8]
+	err = p.readAll(buf)
+	value = int64(binary.BigEndian.Uint64(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadDouble() (value float64, err error) {
+	buf := p.buffer[0:8]
+	err = p.readAll(buf)
+	value = math.Float64frombits(binary.BigEndian.Uint64(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadString() (value string, err error) {
+	size, e := p.ReadI32()
+	if e != nil {
+		return "", e
+	}
+	if size < 0 {
+		err = invalidDataLength
+		return
+	}
+
+	return p.readStringBody(size)
+}
+
+func (p *TBinaryProtocol) ReadBinary() ([]byte, error) {
+	size, e := p.ReadI32()
+	if e != nil {
+		return nil, e
+	}
+	if size < 0 {
+		return nil, invalidDataLength
+	}
+
+	isize := int(size)
+	buf := make([]byte, isize)
+	_, err := io.ReadFull(p.trans, buf)
+	return buf, NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) Flush(ctx context.Context) (err error) {
+	return NewTProtocolException(p.trans.Flush(ctx))
+}
+
+func (p *TBinaryProtocol) Skip(fieldType TType) (err error) {
+	return SkipDefaultDepth(p, fieldType)
+}
+
+func (p *TBinaryProtocol) Transport() TTransport {
+	return p.origTransport
+}
+
+func (p *TBinaryProtocol) readAll(buf []byte) error {
+	_, err := io.ReadFull(p.reader, buf)
+	return NewTProtocolException(err)
+}
+
+const readLimit = 32768
+
+func (p *TBinaryProtocol) readStringBody(size int32) (value string, err error) {
+	if size < 0 {
+		return "", nil
+	}
+
+	var (
+		buf bytes.Buffer
+		e   error
+		b   []byte
+	)
+
+	switch {
+	case int(size) <= len(p.buffer):
+		b = p.buffer[:size] // avoids allocation for small reads
+	case int(size) < readLimit:
+		b = make([]byte, size)
+	default:
+		b = make([]byte, readLimit)
+	}
+
+	for size > 0 {
+		_, e = io.ReadFull(p.trans, b)
+		buf.Write(b)
+		if e != nil {
+			break
+		}
+		size -= readLimit
+		if size < readLimit && size > 0 {
+			b = b[:size]
+		}
+	}
+	return buf.String(), NewTProtocolException(e)
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/buffered_transport.go

@@ -0,0 +1,92 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bufio"
+	"context"
+)
+
+type TBufferedTransportFactory struct {
+	size int
+}
+
+type TBufferedTransport struct {
+	bufio.ReadWriter
+	tp TTransport
+}
+
+func (p *TBufferedTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	return NewTBufferedTransport(trans, p.size), nil
+}
+
+func NewTBufferedTransportFactory(bufferSize int) *TBufferedTransportFactory {
+	return &TBufferedTransportFactory{size: bufferSize}
+}
+
+func NewTBufferedTransport(trans TTransport, bufferSize int) *TBufferedTransport {
+	return &TBufferedTransport{
+		ReadWriter: bufio.ReadWriter{
+			Reader: bufio.NewReaderSize(trans, bufferSize),
+			Writer: bufio.NewWriterSize(trans, bufferSize),
+		},
+		tp: trans,
+	}
+}
+
+func (p *TBufferedTransport) IsOpen() bool {
+	return p.tp.IsOpen()
+}
+
+func (p *TBufferedTransport) Open() (err error) {
+	return p.tp.Open()
+}
+
+func (p *TBufferedTransport) Close() (err error) {
+	return p.tp.Close()
+}
+
+func (p *TBufferedTransport) Read(b []byte) (int, error) {
+	n, err := p.ReadWriter.Read(b)
+	if err != nil {
+		p.ReadWriter.Reader.Reset(p.tp)
+	}
+	return n, err
+}
+
+func (p *TBufferedTransport) Write(b []byte) (int, error) {
+	n, err := p.ReadWriter.Write(b)
+	if err != nil {
+		p.ReadWriter.Writer.Reset(p.tp)
+	}
+	return n, err
+}
+
+func (p *TBufferedTransport) Flush(ctx context.Context) error {
+	if err := p.ReadWriter.Flush(); err != nil {
+		p.ReadWriter.Writer.Reset(p.tp)
+		return err
+	}
+	return p.tp.Flush(ctx)
+}
+
+func (p *TBufferedTransport) RemainingBytes() (num_bytes uint64) {
+	return p.tp.RemainingBytes()
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/client.go

@@ -0,0 +1,85 @@
+package thrift
+
+import (
+	"context"
+	"fmt"
+)
+
+type TClient interface {
+	Call(ctx context.Context, method string, args, result TStruct) error
+}
+
+type TStandardClient struct {
+	seqId        int32
+	iprot, oprot TProtocol
+}
+
+// TStandardClient implements TClient, and uses the standard message format for Thrift.
+// It is not safe for concurrent use.
+func NewTStandardClient(inputProtocol, outputProtocol TProtocol) *TStandardClient {
+	return &TStandardClient{
+		iprot: inputProtocol,
+		oprot: outputProtocol,
+	}
+}
+
+func (p *TStandardClient) Send(ctx context.Context, oprot TProtocol, seqId int32, method string, args TStruct) error {
+	if err := oprot.WriteMessageBegin(method, CALL, seqId); err != nil {
+		return err
+	}
+	if err := args.Write(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteMessageEnd(); err != nil {
+		return err
+	}
+	return oprot.Flush(ctx)
+}
+
+func (p *TStandardClient) Recv(iprot TProtocol, seqId int32, method string, result TStruct) error {
+	rMethod, rTypeId, rSeqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return err
+	}
+
+	if method != rMethod {
+		return NewTApplicationException(WRONG_METHOD_NAME, fmt.Sprintf("%s: wrong method name", method))
+	} else if seqId != rSeqId {
+		return NewTApplicationException(BAD_SEQUENCE_ID, fmt.Sprintf("%s: out of order sequence response", method))
+	} else if rTypeId == EXCEPTION {
+		var exception tApplicationException
+		if err := exception.Read(iprot); err != nil {
+			return err
+		}
+
+		if err := iprot.ReadMessageEnd(); err != nil {
+			return err
+		}
+
+		return &exception
+	} else if rTypeId != REPLY {
+		return NewTApplicationException(INVALID_MESSAGE_TYPE_EXCEPTION, fmt.Sprintf("%s: invalid message type", method))
+	}
+
+	if err := result.Read(iprot); err != nil {
+		return err
+	}
+
+	return iprot.ReadMessageEnd()
+}
+
+func (p *TStandardClient) Call(ctx context.Context, method string, args, result TStruct) error {
+	p.seqId++
+	seqId := p.seqId
+
+	if err := p.Send(ctx, p.oprot, seqId, method, args); err != nil {
+		return err
+	}
+
+	// method is oneway
+	if result == nil {
+		return nil
+	}
+
+	return p.Recv(p.iprot, seqId, method, result)
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/compact_protocol.go

@@ -0,0 +1,810 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+)
+
+const (
+	COMPACT_PROTOCOL_ID       = 0x082
+	COMPACT_VERSION           = 1
+	COMPACT_VERSION_MASK      = 0x1f
+	COMPACT_TYPE_MASK         = 0x0E0
+	COMPACT_TYPE_BITS         = 0x07
+	COMPACT_TYPE_SHIFT_AMOUNT = 5
+)
+
+type tCompactType byte
+
+const (
+	COMPACT_BOOLEAN_TRUE  = 0x01
+	COMPACT_BOOLEAN_FALSE = 0x02
+	COMPACT_BYTE          = 0x03
+	COMPACT_I16           = 0x04
+	COMPACT_I32           = 0x05
+	COMPACT_I64           = 0x06
+	COMPACT_DOUBLE        = 0x07
+	COMPACT_BINARY        = 0x08
+	COMPACT_LIST          = 0x09
+	COMPACT_SET           = 0x0A
+	COMPACT_MAP           = 0x0B
+	COMPACT_STRUCT        = 0x0C
+)
+
+var (
+	ttypeToCompactType map[TType]tCompactType
+)
+
+func init() {
+	ttypeToCompactType = map[TType]tCompactType{
+		STOP:   STOP,
+		BOOL:   COMPACT_BOOLEAN_TRUE,
+		BYTE:   COMPACT_BYTE,
+		I16:    COMPACT_I16,
+		I32:    COMPACT_I32,
+		I64:    COMPACT_I64,
+		DOUBLE: COMPACT_DOUBLE,
+		STRING: COMPACT_BINARY,
+		LIST:   COMPACT_LIST,
+		SET:    COMPACT_SET,
+		MAP:    COMPACT_MAP,
+		STRUCT: COMPACT_STRUCT,
+	}
+}
+
+type TCompactProtocolFactory struct{}
+
+func NewTCompactProtocolFactory() *TCompactProtocolFactory {
+	return &TCompactProtocolFactory{}
+}
+
+func (p *TCompactProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return NewTCompactProtocol(trans)
+}
+
+type TCompactProtocol struct {
+	trans         TRichTransport
+	origTransport TTransport
+
+	// Used to keep track of the last field for the current and previous structs,
+	// so we can do the delta stuff.
+	lastField   []int
+	lastFieldId int
+
+	// If we encounter a boolean field begin, save the TField here so it can
+	// have the value incorporated.
+	booleanFieldName    string
+	booleanFieldId      int16
+	booleanFieldPending bool
+
+	// If we read a field header, and it's a boolean field, save the boolean
+	// value here so that readBool can use it.
+	boolValue          bool
+	boolValueIsNotNull bool
+	buffer             [64]byte
+}
+
+// Create a TCompactProtocol given a TTransport
+func NewTCompactProtocol(trans TTransport) *TCompactProtocol {
+	p := &TCompactProtocol{origTransport: trans, lastField: []int{}}
+	if et, ok := trans.(TRichTransport); ok {
+		p.trans = et
+	} else {
+		p.trans = NewTRichTransport(trans)
+	}
+
+	return p
+
+}
+
+//
+// Public Writing methods.
+//
+
+// Write a message header to the wire. Compact Protocol messages contain the
+// protocol version so we can migrate forwards in the future if need be.
+func (p *TCompactProtocol) WriteMessageBegin(name string, typeId TMessageType, seqid int32) error {
+	err := p.writeByteDirect(COMPACT_PROTOCOL_ID)
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	err = p.writeByteDirect((COMPACT_VERSION & COMPACT_VERSION_MASK) | ((byte(typeId) << COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_MASK))
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	_, err = p.writeVarint32(seqid)
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	e := p.WriteString(name)
+	return e
+
+}
+
+func (p *TCompactProtocol) WriteMessageEnd() error { return nil }
+
+// Write a struct begin. This doesn't actually put anything on the wire. We
+// use it as an opportunity to put special placeholder markers on the field
+// stack so we can get the field id deltas correct.
+func (p *TCompactProtocol) WriteStructBegin(name string) error {
+	p.lastField = append(p.lastField, p.lastFieldId)
+	p.lastFieldId = 0
+	return nil
+}
+
+// Write a struct end. This doesn't actually put anything on the wire. We use
+// this as an opportunity to pop the last field from the current struct off
+// of the field stack.
+func (p *TCompactProtocol) WriteStructEnd() error {
+	p.lastFieldId = p.lastField[len(p.lastField)-1]
+	p.lastField = p.lastField[:len(p.lastField)-1]
+	return nil
+}
+
+func (p *TCompactProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
+	if typeId == BOOL {
+		// we want to possibly include the value, so we'll wait.
+		p.booleanFieldName, p.booleanFieldId, p.booleanFieldPending = name, id, true
+		return nil
+	}
+	_, err := p.writeFieldBeginInternal(name, typeId, id, 0xFF)
+	return NewTProtocolException(err)
+}
+
+// The workhorse of writeFieldBegin. It has the option of doing a
+// 'type override' of the type header. This is used specifically in the
+// boolean field case.
+func (p *TCompactProtocol) writeFieldBeginInternal(name string, typeId TType, id int16, typeOverride byte) (int, error) {
+	// short lastField = lastField_.pop();
+
+	// if there's a type override, use that.
+	var typeToWrite byte
+	if typeOverride == 0xFF {
+		typeToWrite = byte(p.getCompactType(typeId))
+	} else {
+		typeToWrite = typeOverride
+	}
+	// check if we can use delta encoding for the field id
+	fieldId := int(id)
+	written := 0
+	if fieldId > p.lastFieldId && fieldId-p.lastFieldId <= 15 {
+		// write them together
+		err := p.writeByteDirect(byte((fieldId-p.lastFieldId)<<4) | typeToWrite)
+		if err != nil {
+			return 0, err
+		}
+	} else {
+		// write them separate
+		err := p.writeByteDirect(typeToWrite)
+		if err != nil {
+			return 0, err
+		}
+		err = p.WriteI16(id)
+		written = 1 + 2
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	p.lastFieldId = fieldId
+	// p.lastField.Push(field.id);
+	return written, nil
+}
+
+func (p *TCompactProtocol) WriteFieldEnd() error { return nil }
+
+func (p *TCompactProtocol) WriteFieldStop() error {
+	err := p.writeByteDirect(STOP)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+	if size == 0 {
+		err := p.writeByteDirect(0)
+		return NewTProtocolException(err)
+	}
+	_, err := p.writeVarint32(int32(size))
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	err = p.writeByteDirect(byte(p.getCompactType(keyType))<<4 | byte(p.getCompactType(valueType)))
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteMapEnd() error { return nil }
+
+// Write a list header.
+func (p *TCompactProtocol) WriteListBegin(elemType TType, size int) error {
+	_, err := p.writeCollectionBegin(elemType, size)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteListEnd() error { return nil }
+
+// Write a set header.
+func (p *TCompactProtocol) WriteSetBegin(elemType TType, size int) error {
+	_, err := p.writeCollectionBegin(elemType, size)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteSetEnd() error { return nil }
+
+func (p *TCompactProtocol) WriteBool(value bool) error {
+	v := byte(COMPACT_BOOLEAN_FALSE)
+	if value {
+		v = byte(COMPACT_BOOLEAN_TRUE)
+	}
+	if p.booleanFieldPending {
+		// we haven't written the field header yet
+		_, err := p.writeFieldBeginInternal(p.booleanFieldName, BOOL, p.booleanFieldId, v)
+		p.booleanFieldPending = false
+		return NewTProtocolException(err)
+	}
+	// we're not part of a field, so just write the value.
+	err := p.writeByteDirect(v)
+	return NewTProtocolException(err)
+}
+
+// Write a byte. Nothing to see here!
+func (p *TCompactProtocol) WriteByte(value int8) error {
+	err := p.writeByteDirect(byte(value))
+	return NewTProtocolException(err)
+}
+
+// Write an I16 as a zigzag varint.
+func (p *TCompactProtocol) WriteI16(value int16) error {
+	_, err := p.writeVarint32(p.int32ToZigzag(int32(value)))
+	return NewTProtocolException(err)
+}
+
+// Write an i32 as a zigzag varint.
+func (p *TCompactProtocol) WriteI32(value int32) error {
+	_, err := p.writeVarint32(p.int32ToZigzag(value))
+	return NewTProtocolException(err)
+}
+
+// Write an i64 as a zigzag varint.
+func (p *TCompactProtocol) WriteI64(value int64) error {
+	_, err := p.writeVarint64(p.int64ToZigzag(value))
+	return NewTProtocolException(err)
+}
+
+// Write a double to the wire as 8 bytes.
+func (p *TCompactProtocol) WriteDouble(value float64) error {
+	buf := p.buffer[0:8]
+	binary.LittleEndian.PutUint64(buf, math.Float64bits(value))
+	_, err := p.trans.Write(buf)
+	return NewTProtocolException(err)
+}
+
+// Write a string to the wire with a varint size preceding.
+func (p *TCompactProtocol) WriteString(value string) error {
+	_, e := p.writeVarint32(int32(len(value)))
+	if e != nil {
+		return NewTProtocolException(e)
+	}
+	if len(value) > 0 {
+	}
+	_, e = p.trans.WriteString(value)
+	return e
+}
+
+// Write a byte array, using a varint for the size.
+func (p *TCompactProtocol) WriteBinary(bin []byte) error {
+	_, e := p.writeVarint32(int32(len(bin)))
+	if e != nil {
+		return NewTProtocolException(e)
+	}
+	if len(bin) > 0 {
+		_, e = p.trans.Write(bin)
+		return NewTProtocolException(e)
+	}
+	return nil
+}
+
+//
+// Reading methods.
+//
+
+// Read a message header.
+func (p *TCompactProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
+
+	protocolId, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	if protocolId != COMPACT_PROTOCOL_ID {
+		e := fmt.Errorf("Expected protocol id %02x but got %02x", COMPACT_PROTOCOL_ID, protocolId)
+		return "", typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, e)
+	}
+
+	versionAndType, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	version := versionAndType & COMPACT_VERSION_MASK
+	typeId = TMessageType((versionAndType >> COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_BITS)
+	if version != COMPACT_VERSION {
+		e := fmt.Errorf("Expected version %02x but got %02x", COMPACT_VERSION, version)
+		err = NewTProtocolExceptionWithType(BAD_VERSION, e)
+		return
+	}
+	seqId, e := p.readVarint32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	name, err = p.ReadString()
+	return
+}
+
+func (p *TCompactProtocol) ReadMessageEnd() error { return nil }
+
+// Read a struct begin. There's nothing on the wire for this, but it is our
+// opportunity to push a new struct begin marker onto the field stack.
+func (p *TCompactProtocol) ReadStructBegin() (name string, err error) {
+	p.lastField = append(p.lastField, p.lastFieldId)
+	p.lastFieldId = 0
+	return
+}
+
+// Doesn't actually consume any wire data, just removes the last field for
+// this struct from the field stack.
+func (p *TCompactProtocol) ReadStructEnd() error {
+	// consume the last field we read off the wire.
+	p.lastFieldId = p.lastField[len(p.lastField)-1]
+	p.lastField = p.lastField[:len(p.lastField)-1]
+	return nil
+}
+
+// Read a field header off the wire.
+func (p *TCompactProtocol) ReadFieldBegin() (name string, typeId TType, id int16, err error) {
+	t, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	// if it's a stop, then we can return immediately, as the struct is over.
+	if (t & 0x0f) == STOP {
+		return "", STOP, 0, nil
+	}
+
+	// mask off the 4 MSB of the type header. it could contain a field id delta.
+	modifier := int16((t & 0xf0) >> 4)
+	if modifier == 0 {
+		// not a delta. look ahead for the zigzag varint field id.
+		id, err = p.ReadI16()
+		if err != nil {
+			return
+		}
+	} else {
+		// has a delta. add the delta to the last read field id.
+		id = int16(p.lastFieldId) + modifier
+	}
+	typeId, e := p.getTType(tCompactType(t & 0x0f))
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+
+	// if this happens to be a boolean field, the value is encoded in the type
+	if p.isBoolType(t) {
+		// save the boolean value in a special instance variable.
+		p.boolValue = (byte(t)&0x0f == COMPACT_BOOLEAN_TRUE)
+		p.boolValueIsNotNull = true
+	}
+
+	// push the new field onto the field stack so we can keep the deltas going.
+	p.lastFieldId = int(id)
+	return
+}
+
+func (p *TCompactProtocol) ReadFieldEnd() error { return nil }
+
+// Read a map header off the wire. If the size is zero, skip reading the key
+// and value type. This means that 0-length maps will yield TMaps without the
+// "correct" types.
+func (p *TCompactProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, err error) {
+	size32, e := p.readVarint32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+
+	keyAndValueType := byte(STOP)
+	if size != 0 {
+		keyAndValueType, err = p.readByteDirect()
+		if err != nil {
+			return
+		}
+	}
+	keyType, _ = p.getTType(tCompactType(keyAndValueType >> 4))
+	valueType, _ = p.getTType(tCompactType(keyAndValueType & 0xf))
+	return
+}
+
+func (p *TCompactProtocol) ReadMapEnd() error { return nil }
+
+// Read a list header off the wire. If the list size is 0-14, the size will
+// be packed into the element type header. If it's a longer list, the 4 MSB
+// of the element type header will be 0xF, and a varint will follow with the
+// true size.
+func (p *TCompactProtocol) ReadListBegin() (elemType TType, size int, err error) {
+	size_and_type, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+	size = int((size_and_type >> 4) & 0x0f)
+	if size == 15 {
+		size2, e := p.readVarint32()
+		if e != nil {
+			err = NewTProtocolException(e)
+			return
+		}
+		if size2 < 0 {
+			err = invalidDataLength
+			return
+		}
+		size = int(size2)
+	}
+	elemType, e := p.getTType(tCompactType(size_and_type))
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	return
+}
+
+func (p *TCompactProtocol) ReadListEnd() error { return nil }
+
+// Read a set header off the wire. If the set size is 0-14, the size will
+// be packed into the element type header. If it's a longer set, the 4 MSB
+// of the element type header will be 0xF, and a varint will follow with the
+// true size.
+func (p *TCompactProtocol) ReadSetBegin() (elemType TType, size int, err error) {
+	return p.ReadListBegin()
+}
+
+func (p *TCompactProtocol) ReadSetEnd() error { return nil }
+
+// Read a boolean off the wire. If this is a boolean field, the value should
+// already have been read during readFieldBegin, so we'll just consume the
+// pre-stored value. Otherwise, read a byte.
+func (p *TCompactProtocol) ReadBool() (value bool, err error) {
+	if p.boolValueIsNotNull {
+		p.boolValueIsNotNull = false
+		return p.boolValue, nil
+	}
+	v, err := p.readByteDirect()
+	return v == COMPACT_BOOLEAN_TRUE, err
+}
+
+// Read a single byte off the wire. Nothing interesting here.
+func (p *TCompactProtocol) ReadByte() (int8, error) {
+	v, err := p.readByteDirect()
+	if err != nil {
+		return 0, NewTProtocolException(err)
+	}
+	return int8(v), err
+}
+
+// Read an i16 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI16() (value int16, err error) {
+	v, err := p.ReadI32()
+	return int16(v), err
+}
+
+// Read an i32 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI32() (value int32, err error) {
+	v, e := p.readVarint32()
+	if e != nil {
+		return 0, NewTProtocolException(e)
+	}
+	value = p.zigzagToInt32(v)
+	return value, nil
+}
+
+// Read an i64 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI64() (value int64, err error) {
+	v, e := p.readVarint64()
+	if e != nil {
+		return 0, NewTProtocolException(e)
+	}
+	value = p.zigzagToInt64(v)
+	return value, nil
+}
+
+// No magic here - just read a double off the wire.
+func (p *TCompactProtocol) ReadDouble() (value float64, err error) {
+	longBits := p.buffer[0:8]
+	_, e := io.ReadFull(p.trans, longBits)
+	if e != nil {
+		return 0.0, NewTProtocolException(e)
+	}
+	return math.Float64frombits(p.bytesToUint64(longBits)), nil
+}
+
+// Reads a []byte (via readBinary), and then UTF-8 decodes it.
+func (p *TCompactProtocol) ReadString() (value string, err error) {
+	length, e := p.readVarint32()
+	if e != nil {
+		return "", NewTProtocolException(e)
+	}
+	if length < 0 {
+		return "", invalidDataLength
+	}
+
+	if length == 0 {
+		return "", nil
+	}
+	var buf []byte
+	if length <= int32(len(p.buffer)) {
+		buf = p.buffer[0:length]
+	} else {
+		buf = make([]byte, length)
+	}
+	_, e = io.ReadFull(p.trans, buf)
+	return string(buf), NewTProtocolException(e)
+}
+
+// Read a []byte from the wire.
+func (p *TCompactProtocol) ReadBinary() (value []byte, err error) {
+	length, e := p.readVarint32()
+	if e != nil {
+		return nil, NewTProtocolException(e)
+	}
+	if length == 0 {
+		return []byte{}, nil
+	}
+	if length < 0 {
+		return nil, invalidDataLength
+	}
+
+	buf := make([]byte, length)
+	_, e = io.ReadFull(p.trans, buf)
+	return buf, NewTProtocolException(e)
+}
+
+func (p *TCompactProtocol) Flush(ctx context.Context) (err error) {
+	return NewTProtocolException(p.trans.Flush(ctx))
+}
+
+func (p *TCompactProtocol) Skip(fieldType TType) (err error) {
+	return SkipDefaultDepth(p, fieldType)
+}
+
+func (p *TCompactProtocol) Transport() TTransport {
+	return p.origTransport
+}
+
+//
+// Internal writing methods
+//
+
+// Abstract method for writing the start of lists and sets. List and sets on
+// the wire differ only by the type indicator.
+func (p *TCompactProtocol) writeCollectionBegin(elemType TType, size int) (int, error) {
+	if size <= 14 {
+		return 1, p.writeByteDirect(byte(int32(size<<4) | int32(p.getCompactType(elemType))))
+	}
+	err := p.writeByteDirect(0xf0 | byte(p.getCompactType(elemType)))
+	if err != nil {
+		return 0, err
+	}
+	m, err := p.writeVarint32(int32(size))
+	return 1 + m, err
+}
+
+// Write an i32 as a varint. Results in 1-5 bytes on the wire.
+// TODO(pomack): make a permanent buffer like writeVarint64?
+func (p *TCompactProtocol) writeVarint32(n int32) (int, error) {
+	i32buf := p.buffer[0:5]
+	idx := 0
+	for {
+		if (n & ^0x7F) == 0 {
+			i32buf[idx] = byte(n)
+			idx++
+			// p.writeByteDirect(byte(n));
+			break
+			// return;
+		} else {
+			i32buf[idx] = byte((n & 0x7F) | 0x80)
+			idx++
+			// p.writeByteDirect(byte(((n & 0x7F) | 0x80)));
+			u := uint32(n)
+			n = int32(u >> 7)
+		}
+	}
+	return p.trans.Write(i32buf[0:idx])
+}
+
+// Write an i64 as a varint. Results in 1-10 bytes on the wire.
+func (p *TCompactProtocol) writeVarint64(n int64) (int, error) {
+	varint64out := p.buffer[0:10]
+	idx := 0
+	for {
+		if (n & ^0x7F) == 0 {
+			varint64out[idx] = byte(n)
+			idx++
+			break
+		} else {
+			varint64out[idx] = byte((n & 0x7F) | 0x80)
+			idx++
+			u := uint64(n)
+			n = int64(u >> 7)
+		}
+	}
+	return p.trans.Write(varint64out[0:idx])
+}
+
+// Convert l into a zigzag long. This allows negative numbers to be
+// represented compactly as a varint.
+func (p *TCompactProtocol) int64ToZigzag(l int64) int64 {
+	return (l << 1) ^ (l >> 63)
+}
+
+// Convert l into a zigzag long. This allows negative numbers to be
+// represented compactly as a varint.
+func (p *TCompactProtocol) int32ToZigzag(n int32) int32 {
+	return (n << 1) ^ (n >> 31)
+}
+
+func (p *TCompactProtocol) fixedUint64ToBytes(n uint64, buf []byte) {
+	binary.LittleEndian.PutUint64(buf, n)
+}
+
+func (p *TCompactProtocol) fixedInt64ToBytes(n int64, buf []byte) {
+	binary.LittleEndian.PutUint64(buf, uint64(n))
+}
+
+// Writes a byte without any possibility of all that field header nonsense.
+// Used internally by other writing methods that know they need to write a byte.
+func (p *TCompactProtocol) writeByteDirect(b byte) error {
+	return p.trans.WriteByte(b)
+}
+
+// Writes a byte without any possibility of all that field header nonsense.
+func (p *TCompactProtocol) writeIntAsByteDirect(n int) (int, error) {
+	return 1, p.writeByteDirect(byte(n))
+}
+
+//
+// Internal reading methods
+//
+
+// Read an i32 from the wire as a varint. The MSB of each byte is set
+// if there is another byte to follow. This can read up to 5 bytes.
+func (p *TCompactProtocol) readVarint32() (int32, error) {
+	// if the wire contains the right stuff, this will just truncate the i64 we
+	// read and get us the right sign.
+	v, err := p.readVarint64()
+	return int32(v), err
+}
+
+// Read an i64 from the wire as a proper varint. The MSB of each byte is set
+// if there is another byte to follow. This can read up to 10 bytes.
+func (p *TCompactProtocol) readVarint64() (int64, error) {
+	shift := uint(0)
+	result := int64(0)
+	for {
+		b, err := p.readByteDirect()
+		if err != nil {
+			return 0, err
+		}
+		result |= int64(b&0x7f) << shift
+		if (b & 0x80) != 0x80 {
+			break
+		}
+		shift += 7
+	}
+	return result, nil
+}
+
+// Read a byte, unlike ReadByte that reads Thrift-byte that is i8.
+func (p *TCompactProtocol) readByteDirect() (byte, error) {
+	return p.trans.ReadByte()
+}
+
+//
+// encoding helpers
+//
+
+// Convert from zigzag int to int.
+func (p *TCompactProtocol) zigzagToInt32(n int32) int32 {
+	u := uint32(n)
+	return int32(u>>1) ^ -(n & 1)
+}
+
+// Convert from zigzag long to long.
+func (p *TCompactProtocol) zigzagToInt64(n int64) int64 {
+	u := uint64(n)
+	return int64(u>>1) ^ -(n & 1)
+}
+
+// Note that it's important that the mask bytes are long literals,
+// otherwise they'll default to ints, and when you shift an int left 56 bits,
+// you just get a messed up int.
+func (p *TCompactProtocol) bytesToInt64(b []byte) int64 {
+	return int64(binary.LittleEndian.Uint64(b))
+}
+
+// Note that it's important that the mask bytes are long literals,
+// otherwise they'll default to ints, and when you shift an int left 56 bits,
+// you just get a messed up int.
+func (p *TCompactProtocol) bytesToUint64(b []byte) uint64 {
+	return binary.LittleEndian.Uint64(b)
+}
+
+//
+// type testing and converting
+//
+
+func (p *TCompactProtocol) isBoolType(b byte) bool {
+	return (b&0x0f) == COMPACT_BOOLEAN_TRUE || (b&0x0f) == COMPACT_BOOLEAN_FALSE
+}
+
+// Given a tCompactType constant, convert it to its corresponding
+// TType value.
+func (p *TCompactProtocol) getTType(t tCompactType) (TType, error) {
+	switch byte(t) & 0x0f {
+	case STOP:
+		return STOP, nil
+	case COMPACT_BOOLEAN_FALSE, COMPACT_BOOLEAN_TRUE:
+		return BOOL, nil
+	case COMPACT_BYTE:
+		return BYTE, nil
+	case COMPACT_I16:
+		return I16, nil
+	case COMPACT_I32:
+		return I32, nil
+	case COMPACT_I64:
+		return I64, nil
+	case COMPACT_DOUBLE:
+		return DOUBLE, nil
+	case COMPACT_BINARY:
+		return STRING, nil
+	case COMPACT_LIST:
+		return LIST, nil
+	case COMPACT_SET:
+		return SET, nil
+	case COMPACT_MAP:
+		return MAP, nil
+	case COMPACT_STRUCT:
+		return STRUCT, nil
+	}
+	return STOP, TException(fmt.Errorf("don't know what type: %v", t&0x0f))
+}
+
+// Given a TType value, find the appropriate TCompactProtocol.Types constant.
+func (p *TCompactProtocol) getCompactType(t TType) tCompactType {
+	return ttypeToCompactType[t]
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/context.go

@@ -0,0 +1,24 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import "context"
+
+var defaultCtx = context.Background()

vendor/git.apache.org/thrift.git/lib/go/thrift/debug_protocol.go

@@ -0,0 +1,270 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"log"
+)
+
+type TDebugProtocol struct {
+	Delegate  TProtocol
+	LogPrefix string
+}
+
+type TDebugProtocolFactory struct {
+	Underlying TProtocolFactory
+	LogPrefix  string
+}
+
+func NewTDebugProtocolFactory(underlying TProtocolFactory, logPrefix string) *TDebugProtocolFactory {
+	return &TDebugProtocolFactory{
+		Underlying: underlying,
+		LogPrefix:  logPrefix,
+	}
+}
+
+func (t *TDebugProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return &TDebugProtocol{
+		Delegate:  t.Underlying.GetProtocol(trans),
+		LogPrefix: t.LogPrefix,
+	}
+}
+
+func (tdp *TDebugProtocol) WriteMessageBegin(name string, typeId TMessageType, seqid int32) error {
+	err := tdp.Delegate.WriteMessageBegin(name, typeId, seqid)
+	log.Printf("%sWriteMessageBegin(name=%#v, typeId=%#v, seqid=%#v) => %#v", tdp.LogPrefix, name, typeId, seqid, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteMessageEnd() error {
+	err := tdp.Delegate.WriteMessageEnd()
+	log.Printf("%sWriteMessageEnd() => %#v", tdp.LogPrefix, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteStructBegin(name string) error {
+	err := tdp.Delegate.WriteStructBegin(name)
+	log.Printf("%sWriteStructBegin(name=%#v) => %#v", tdp.LogPrefix, name, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteStructEnd() error {
+	err := tdp.Delegate.WriteStructEnd()
+	log.Printf("%sWriteStructEnd() => %#v", tdp.LogPrefix, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
+	err := tdp.Delegate.WriteFieldBegin(name, typeId, id)
+	log.Printf("%sWriteFieldBegin(name=%#v, typeId=%#v, id%#v) => %#v", tdp.LogPrefix, name, typeId, id, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteFieldEnd() error {
+	err := tdp.Delegate.WriteFieldEnd()
+	log.Printf("%sWriteFieldEnd() => %#v", tdp.LogPrefix, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteFieldStop() error {
+	err := tdp.Delegate.WriteFieldStop()
+	log.Printf("%sWriteFieldStop() => %#v", tdp.LogPrefix, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+	err := tdp.Delegate.WriteMapBegin(keyType, valueType, size)
+	log.Printf("%sWriteMapBegin(keyType=%#v, valueType=%#v, size=%#v) => %#v", tdp.LogPrefix, keyType, valueType, size, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteMapEnd() error {
+	err := tdp.Delegate.WriteMapEnd()
+	log.Printf("%sWriteMapEnd() => %#v", tdp.LogPrefix, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteListBegin(elemType TType, size int) error {
+	err := tdp.Delegate.WriteListBegin(elemType, size)
+	log.Printf("%sWriteListBegin(elemType=%#v, size=%#v) => %#v", tdp.LogPrefix, elemType, size, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteListEnd() error {
+	err := tdp.Delegate.WriteListEnd()
+	log.Printf("%sWriteListEnd() => %#v", tdp.LogPrefix, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteSetBegin(elemType TType, size int) error {
+	err := tdp.Delegate.WriteSetBegin(elemType, size)
+	log.Printf("%sWriteSetBegin(elemType=%#v, size=%#v) => %#v", tdp.LogPrefix, elemType, size, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteSetEnd() error {
+	err := tdp.Delegate.WriteSetEnd()
+	log.Printf("%sWriteSetEnd() => %#v", tdp.LogPrefix, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteBool(value bool) error {
+	err := tdp.Delegate.WriteBool(value)
+	log.Printf("%sWriteBool(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteByte(value int8) error {
+	err := tdp.Delegate.WriteByte(value)
+	log.Printf("%sWriteByte(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteI16(value int16) error {
+	err := tdp.Delegate.WriteI16(value)
+	log.Printf("%sWriteI16(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteI32(value int32) error {
+	err := tdp.Delegate.WriteI32(value)
+	log.Printf("%sWriteI32(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteI64(value int64) error {
+	err := tdp.Delegate.WriteI64(value)
+	log.Printf("%sWriteI64(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteDouble(value float64) error {
+	err := tdp.Delegate.WriteDouble(value)
+	log.Printf("%sWriteDouble(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteString(value string) error {
+	err := tdp.Delegate.WriteString(value)
+	log.Printf("%sWriteString(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+func (tdp *TDebugProtocol) WriteBinary(value []byte) error {
+	err := tdp.Delegate.WriteBinary(value)
+	log.Printf("%sWriteBinary(value=%#v) => %#v", tdp.LogPrefix, value, err)
+	return err
+}
+
+func (tdp *TDebugProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqid int32, err error) {
+	name, typeId, seqid, err = tdp.Delegate.ReadMessageBegin()
+	log.Printf("%sReadMessageBegin() (name=%#v, typeId=%#v, seqid=%#v, err=%#v)", tdp.LogPrefix, name, typeId, seqid, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadMessageEnd() (err error) {
+	err = tdp.Delegate.ReadMessageEnd()
+	log.Printf("%sReadMessageEnd() err=%#v", tdp.LogPrefix, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadStructBegin() (name string, err error) {
+	name, err = tdp.Delegate.ReadStructBegin()
+	log.Printf("%sReadStructBegin() (name%#v, err=%#v)", tdp.LogPrefix, name, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadStructEnd() (err error) {
+	err = tdp.Delegate.ReadStructEnd()
+	log.Printf("%sReadStructEnd() err=%#v", tdp.LogPrefix, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadFieldBegin() (name string, typeId TType, id int16, err error) {
+	name, typeId, id, err = tdp.Delegate.ReadFieldBegin()
+	log.Printf("%sReadFieldBegin() (name=%#v, typeId=%#v, id=%#v, err=%#v)", tdp.LogPrefix, name, typeId, id, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadFieldEnd() (err error) {
+	err = tdp.Delegate.ReadFieldEnd()
+	log.Printf("%sReadFieldEnd() err=%#v", tdp.LogPrefix, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, err error) {
+	keyType, valueType, size, err = tdp.Delegate.ReadMapBegin()
+	log.Printf("%sReadMapBegin() (keyType=%#v, valueType=%#v, size=%#v, err=%#v)", tdp.LogPrefix, keyType, valueType, size, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadMapEnd() (err error) {
+	err = tdp.Delegate.ReadMapEnd()
+	log.Printf("%sReadMapEnd() err=%#v", tdp.LogPrefix, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadListBegin() (elemType TType, size int, err error) {
+	elemType, size, err = tdp.Delegate.ReadListBegin()
+	log.Printf("%sReadListBegin() (elemType=%#v, size=%#v, err=%#v)", tdp.LogPrefix, elemType, size, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadListEnd() (err error) {
+	err = tdp.Delegate.ReadListEnd()
+	log.Printf("%sReadListEnd() err=%#v", tdp.LogPrefix, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadSetBegin() (elemType TType, size int, err error) {
+	elemType, size, err = tdp.Delegate.ReadSetBegin()
+	log.Printf("%sReadSetBegin() (elemType=%#v, size=%#v, err=%#v)", tdp.LogPrefix, elemType, size, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadSetEnd() (err error) {
+	err = tdp.Delegate.ReadSetEnd()
+	log.Printf("%sReadSetEnd() err=%#v", tdp.LogPrefix, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadBool() (value bool, err error) {
+	value, err = tdp.Delegate.ReadBool()
+	log.Printf("%sReadBool() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadByte() (value int8, err error) {
+	value, err = tdp.Delegate.ReadByte()
+	log.Printf("%sReadByte() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadI16() (value int16, err error) {
+	value, err = tdp.Delegate.ReadI16()
+	log.Printf("%sReadI16() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadI32() (value int32, err error) {
+	value, err = tdp.Delegate.ReadI32()
+	log.Printf("%sReadI32() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadI64() (value int64, err error) {
+	value, err = tdp.Delegate.ReadI64()
+	log.Printf("%sReadI64() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadDouble() (value float64, err error) {
+	value, err = tdp.Delegate.ReadDouble()
+	log.Printf("%sReadDouble() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadString() (value string, err error) {
+	value, err = tdp.Delegate.ReadString()
+	log.Printf("%sReadString() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) ReadBinary() (value []byte, err error) {
+	value, err = tdp.Delegate.ReadBinary()
+	log.Printf("%sReadBinary() (value=%#v, err=%#v)", tdp.LogPrefix, value, err)
+	return
+}
+func (tdp *TDebugProtocol) Skip(fieldType TType) (err error) {
+	err = tdp.Delegate.Skip(fieldType)
+	log.Printf("%sSkip(fieldType=%#v) (err=%#v)", tdp.LogPrefix, fieldType, err)
+	return
+}
+func (tdp *TDebugProtocol) Flush(ctx context.Context) (err error) {
+	err = tdp.Delegate.Flush(ctx)
+	log.Printf("%sFlush() (err=%#v)", tdp.LogPrefix, err)
+	return
+}
+
+func (tdp *TDebugProtocol) Transport() TTransport {
+	return tdp.Delegate.Transport()
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/deserializer.go

@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+type TDeserializer struct {
+	Transport TTransport
+	Protocol  TProtocol
+}
+
+func NewTDeserializer() *TDeserializer {
+	var transport TTransport
+	transport = NewTMemoryBufferLen(1024)
+
+	protocol := NewTBinaryProtocolFactoryDefault().GetProtocol(transport)
+
+	return &TDeserializer{
+		transport,
+		protocol}
+}
+
+func (t *TDeserializer) ReadString(msg TStruct, s string) (err error) {
+	err = nil
+	if _, err = t.Transport.Write([]byte(s)); err != nil {
+		return
+	}
+	if err = msg.Read(t.Protocol); err != nil {
+		return
+	}
+	return
+}
+
+func (t *TDeserializer) Read(msg TStruct, b []byte) (err error) {
+	err = nil
+	if _, err = t.Transport.Write(b); err != nil {
+		return
+	}
+	if err = msg.Read(t.Protocol); err != nil {
+		return
+	}
+	return
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/exception.go

@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+)
+
+// Generic Thrift exception
+type TException interface {
+	error
+}
+
+// Prepends additional information to an error without losing the Thrift exception interface
+func PrependError(prepend string, err error) error {
+	if t, ok := err.(TTransportException); ok {
+		return NewTTransportException(t.TypeId(), prepend+t.Error())
+	}
+	if t, ok := err.(TProtocolException); ok {
+		return NewTProtocolExceptionWithType(t.TypeId(), errors.New(prepend+err.Error()))
+	}
+	if t, ok := err.(TApplicationException); ok {
+		return NewTApplicationException(t.TypeId(), prepend+t.Error())
+	}
+
+	return errors.New(prepend + err.Error())
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/field.go

@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Helper class that encapsulates field metadata.
+type field struct {
+	name   string
+	typeId TType
+	id     int
+}
+
+func newField(n string, t TType, i int) *field {
+	return &field{name: n, typeId: t, id: i}
+}
+
+func (p *field) Name() string {
+	if p == nil {
+		return ""
+	}
+	return p.name
+}
+
+func (p *field) TypeId() TType {
+	if p == nil {
+		return TType(VOID)
+	}
+	return p.typeId
+}
+
+func (p *field) Id() int {
+	if p == nil {
+		return -1
+	}
+	return p.id
+}
+
+func (p *field) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return "<TField name:'" + p.name + "' type:" + string(p.typeId) + " field-id:" + string(p.id) + ">"
+}
+
+var ANONYMOUS_FIELD *field
+
+type fieldSlice []field
+
+func (p fieldSlice) Len() int {
+	return len(p)
+}
+
+func (p fieldSlice) Less(i, j int) bool {
+	return p[i].Id() < p[j].Id()
+}
+
+func (p fieldSlice) Swap(i, j int) {
+	p[i], p[j] = p[j], p[i]
+}
+
+func init() {
+	ANONYMOUS_FIELD = newField("", STOP, 0)
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/framed_transport.go

@@ -0,0 +1,173 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"encoding/binary"
+	"fmt"
+	"io"
+)
+
+const DEFAULT_MAX_LENGTH = 16384000
+
+type TFramedTransport struct {
+	transport TTransport
+	buf       bytes.Buffer
+	reader    *bufio.Reader
+	frameSize uint32 //Current remaining size of the frame. if ==0 read next frame header
+	buffer    [4]byte
+	maxLength uint32
+}
+
+type tFramedTransportFactory struct {
+	factory   TTransportFactory
+	maxLength uint32
+}
+
+func NewTFramedTransportFactory(factory TTransportFactory) TTransportFactory {
+	return &tFramedTransportFactory{factory: factory, maxLength: DEFAULT_MAX_LENGTH}
+}
+
+func NewTFramedTransportFactoryMaxLength(factory TTransportFactory, maxLength uint32) TTransportFactory {
+	return &tFramedTransportFactory{factory: factory, maxLength: maxLength}
+}
+
+func (p *tFramedTransportFactory) GetTransport(base TTransport) (TTransport, error) {
+	tt, err := p.factory.GetTransport(base)
+	if err != nil {
+		return nil, err
+	}
+	return NewTFramedTransportMaxLength(tt, p.maxLength), nil
+}
+
+func NewTFramedTransport(transport TTransport) *TFramedTransport {
+	return &TFramedTransport{transport: transport, reader: bufio.NewReader(transport), maxLength: DEFAULT_MAX_LENGTH}
+}
+
+func NewTFramedTransportMaxLength(transport TTransport, maxLength uint32) *TFramedTransport {
+	return &TFramedTransport{transport: transport, reader: bufio.NewReader(transport), maxLength: maxLength}
+}
+
+func (p *TFramedTransport) Open() error {
+	return p.transport.Open()
+}
+
+func (p *TFramedTransport) IsOpen() bool {
+	return p.transport.IsOpen()
+}
+
+func (p *TFramedTransport) Close() error {
+	return p.transport.Close()
+}
+
+func (p *TFramedTransport) Read(buf []byte) (l int, err error) {
+	if p.frameSize == 0 {
+		p.frameSize, err = p.readFrameHeader()
+		if err != nil {
+			return
+		}
+	}
+	if p.frameSize < uint32(len(buf)) {
+		frameSize := p.frameSize
+		tmp := make([]byte, p.frameSize)
+		l, err = p.Read(tmp)
+		copy(buf, tmp)
+		if err == nil {
+			err = NewTTransportExceptionFromError(fmt.Errorf("Not enough frame size %d to read %d bytes", frameSize, len(buf)))
+			return
+		}
+	}
+	got, err := p.reader.Read(buf)
+	p.frameSize = p.frameSize - uint32(got)
+	//sanity check
+	if p.frameSize < 0 {
+		return 0, NewTTransportException(UNKNOWN_TRANSPORT_EXCEPTION, "Negative frame size")
+	}
+	return got, NewTTransportExceptionFromError(err)
+}
+
+func (p *TFramedTransport) ReadByte() (c byte, err error) {
+	if p.frameSize == 0 {
+		p.frameSize, err = p.readFrameHeader()
+		if err != nil {
+			return
+		}
+	}
+	if p.frameSize < 1 {
+		return 0, NewTTransportExceptionFromError(fmt.Errorf("Not enough frame size %d to read %d bytes", p.frameSize, 1))
+	}
+	c, err = p.reader.ReadByte()
+	if err == nil {
+		p.frameSize--
+	}
+	return
+}
+
+func (p *TFramedTransport) Write(buf []byte) (int, error) {
+	n, err := p.buf.Write(buf)
+	return n, NewTTransportExceptionFromError(err)
+}
+
+func (p *TFramedTransport) WriteByte(c byte) error {
+	return p.buf.WriteByte(c)
+}
+
+func (p *TFramedTransport) WriteString(s string) (n int, err error) {
+	return p.buf.WriteString(s)
+}
+
+func (p *TFramedTransport) Flush(ctx context.Context) error {
+	size := p.buf.Len()
+	buf := p.buffer[:4]
+	binary.BigEndian.PutUint32(buf, uint32(size))
+	_, err := p.transport.Write(buf)
+	if err != nil {
+		p.buf.Truncate(0)
+		return NewTTransportExceptionFromError(err)
+	}
+	if size > 0 {
+		if n, err := p.buf.WriteTo(p.transport); err != nil {
+			print("Error while flushing write buffer of size ", size, " to transport, only wrote ", n, " bytes: ", err.Error(), "\n")
+			p.buf.Truncate(0)
+			return NewTTransportExceptionFromError(err)
+		}
+	}
+	err = p.transport.Flush(ctx)
+	return NewTTransportExceptionFromError(err)
+}
+
+func (p *TFramedTransport) readFrameHeader() (uint32, error) {
+	buf := p.buffer[:4]
+	if _, err := io.ReadFull(p.reader, buf); err != nil {
+		return 0, err
+	}
+	size := binary.BigEndian.Uint32(buf)
+	if size < 0 || size > p.maxLength {
+		return 0, NewTTransportException(UNKNOWN_TRANSPORT_EXCEPTION, fmt.Sprintf("Incorrect frame size (%d)", size))
+	}
+	return size, nil
+}
+
+func (p *TFramedTransport) RemainingBytes() (num_bytes uint64) {
+	return uint64(p.frameSize)
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/http_client.go

@@ -0,0 +1,242 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"strconv"
+)
+
+// Default to using the shared http client. Library users are
+// free to change this global client or specify one through
+// THttpClientOptions.
+var DefaultHttpClient *http.Client = http.DefaultClient
+
+type THttpClient struct {
+	client             *http.Client
+	response           *http.Response
+	url                *url.URL
+	requestBuffer      *bytes.Buffer
+	header             http.Header
+	nsecConnectTimeout int64
+	nsecReadTimeout    int64
+}
+
+type THttpClientTransportFactory struct {
+	options THttpClientOptions
+	url     string
+}
+
+func (p *THttpClientTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	if trans != nil {
+		t, ok := trans.(*THttpClient)
+		if ok && t.url != nil {
+			return NewTHttpClientWithOptions(t.url.String(), p.options)
+		}
+	}
+	return NewTHttpClientWithOptions(p.url, p.options)
+}
+
+type THttpClientOptions struct {
+	// If nil, DefaultHttpClient is used
+	Client *http.Client
+}
+
+func NewTHttpClientTransportFactory(url string) *THttpClientTransportFactory {
+	return NewTHttpClientTransportFactoryWithOptions(url, THttpClientOptions{})
+}
+
+func NewTHttpClientTransportFactoryWithOptions(url string, options THttpClientOptions) *THttpClientTransportFactory {
+	return &THttpClientTransportFactory{url: url, options: options}
+}
+
+func NewTHttpClientWithOptions(urlstr string, options THttpClientOptions) (TTransport, error) {
+	parsedURL, err := url.Parse(urlstr)
+	if err != nil {
+		return nil, err
+	}
+	buf := make([]byte, 0, 1024)
+	client := options.Client
+	if client == nil {
+		client = DefaultHttpClient
+	}
+	httpHeader := map[string][]string{"Content-Type": {"application/x-thrift"}}
+	return &THttpClient{client: client, url: parsedURL, requestBuffer: bytes.NewBuffer(buf), header: httpHeader}, nil
+}
+
+func NewTHttpClient(urlstr string) (TTransport, error) {
+	return NewTHttpClientWithOptions(urlstr, THttpClientOptions{})
+}
+
+// Set the HTTP Header for this specific Thrift Transport
+// It is important that you first assert the TTransport as a THttpClient type
+// like so:
+//
+// httpTrans := trans.(THttpClient)
+// httpTrans.SetHeader("User-Agent","Thrift Client 1.0")
+func (p *THttpClient) SetHeader(key string, value string) {
+	p.header.Add(key, value)
+}
+
+// Get the HTTP Header represented by the supplied Header Key for this specific Thrift Transport
+// It is important that you first assert the TTransport as a THttpClient type
+// like so:
+//
+// httpTrans := trans.(THttpClient)
+// hdrValue := httpTrans.GetHeader("User-Agent")
+func (p *THttpClient) GetHeader(key string) string {
+	return p.header.Get(key)
+}
+
+// Deletes the HTTP Header given a Header Key for this specific Thrift Transport
+// It is important that you first assert the TTransport as a THttpClient type
+// like so:
+//
+// httpTrans := trans.(THttpClient)
+// httpTrans.DelHeader("User-Agent")
+func (p *THttpClient) DelHeader(key string) {
+	p.header.Del(key)
+}
+
+func (p *THttpClient) Open() error {
+	// do nothing
+	return nil
+}
+
+func (p *THttpClient) IsOpen() bool {
+	return p.response != nil || p.requestBuffer != nil
+}
+
+func (p *THttpClient) closeResponse() error {
+	var err error
+	if p.response != nil && p.response.Body != nil {
+		// The docs specify that if keepalive is enabled and the response body is not
+		// read to completion the connection will never be returned to the pool and
+		// reused. Errors are being ignored here because if the connection is invalid
+		// and this fails for some reason, the Close() method will do any remaining
+		// cleanup.
+		io.Copy(ioutil.Discard, p.response.Body)
+
+		err = p.response.Body.Close()
+	}
+
+	p.response = nil
+	return err
+}
+
+func (p *THttpClient) Close() error {
+	if p.requestBuffer != nil {
+		p.requestBuffer.Reset()
+		p.requestBuffer = nil
+	}
+	return p.closeResponse()
+}
+
+func (p *THttpClient) Read(buf []byte) (int, error) {
+	if p.response == nil {
+		return 0, NewTTransportException(NOT_OPEN, "Response buffer is empty, no request.")
+	}
+	n, err := p.response.Body.Read(buf)
+	if n > 0 && (err == nil || err == io.EOF) {
+		return n, nil
+	}
+	return n, NewTTransportExceptionFromError(err)
+}
+
+func (p *THttpClient) ReadByte() (c byte, err error) {
+	return readByte(p.response.Body)
+}
+
+func (p *THttpClient) Write(buf []byte) (int, error) {
+	n, err := p.requestBuffer.Write(buf)
+	return n, err
+}
+
+func (p *THttpClient) WriteByte(c byte) error {
+	return p.requestBuffer.WriteByte(c)
+}
+
+func (p *THttpClient) WriteString(s string) (n int, err error) {
+	return p.requestBuffer.WriteString(s)
+}
+
+func (p *THttpClient) Flush(ctx context.Context) error {
+	// Close any previous response body to avoid leaking connections.
+	p.closeResponse()
+
+	req, err := http.NewRequest("POST", p.url.String(), p.requestBuffer)
+	if err != nil {
+		return NewTTransportExceptionFromError(err)
+	}
+	req.Header = p.header
+	if ctx != nil {
+		req = req.WithContext(ctx)
+	}
+	response, err := p.client.Do(req)
+	if err != nil {
+		return NewTTransportExceptionFromError(err)
+	}
+	if response.StatusCode != http.StatusOK {
+		// Close the response to avoid leaking file descriptors. closeResponse does
+		// more than just call Close(), so temporarily assign it and reuse the logic.
+		p.response = response
+		p.closeResponse()
+
+		// TODO(pomack) log bad response
+		return NewTTransportException(UNKNOWN_TRANSPORT_EXCEPTION, "HTTP Response code: "+strconv.Itoa(response.StatusCode))
+	}
+	p.response = response
+	return nil
+}
+
+func (p *THttpClient) RemainingBytes() (num_bytes uint64) {
+	len := p.response.ContentLength
+	if len >= 0 {
+		return uint64(len)
+	}
+
+	const maxSize = ^uint64(0)
+	return maxSize // the thruth is, we just don't know unless framed is used
+}
+
+// Deprecated: Use NewTHttpClientTransportFactory instead.
+func NewTHttpPostClientTransportFactory(url string) *THttpClientTransportFactory {
+	return NewTHttpClientTransportFactoryWithOptions(url, THttpClientOptions{})
+}
+
+// Deprecated: Use NewTHttpClientTransportFactoryWithOptions instead.
+func NewTHttpPostClientTransportFactoryWithOptions(url string, options THttpClientOptions) *THttpClientTransportFactory {
+	return NewTHttpClientTransportFactoryWithOptions(url, options)
+}
+
+// Deprecated: Use NewTHttpClientWithOptions instead.
+func NewTHttpPostClientWithOptions(urlstr string, options THttpClientOptions) (TTransport, error) {
+	return NewTHttpClientWithOptions(urlstr, options)
+}
+
+// Deprecated: Use NewTHttpClient instead.
+func NewTHttpPostClient(urlstr string) (TTransport, error) {
+	return NewTHttpClientWithOptions(urlstr, THttpClientOptions{})
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/http_transport.go

@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"compress/gzip"
+	"io"
+	"net/http"
+	"strings"
+)
+
+// NewThriftHandlerFunc is a function that create a ready to use Apache Thrift Handler function
+func NewThriftHandlerFunc(processor TProcessor,
+	inPfactory, outPfactory TProtocolFactory) func(w http.ResponseWriter, r *http.Request) {
+
+	return gz(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("Content-Type", "application/x-thrift")
+
+		transport := NewStreamTransport(r.Body, w)
+		processor.Process(r.Context(), inPfactory.GetProtocol(transport), outPfactory.GetProtocol(transport))
+	})
+}
+
+// gz transparently compresses the HTTP response if the client supports it.
+func gz(handler http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+			handler(w, r)
+			return
+		}
+		w.Header().Set("Content-Encoding", "gzip")
+		gz := gzip.NewWriter(w)
+		defer gz.Close()
+		gzw := gzipResponseWriter{Writer: gz, ResponseWriter: w}
+		handler(gzw, r)
+	}
+}
+
+type gzipResponseWriter struct {
+	io.Writer
+	http.ResponseWriter
+}
+
+func (w gzipResponseWriter) Write(b []byte) (int, error) {
+	return w.Writer.Write(b)
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/iostream_transport.go

@@ -0,0 +1,214 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bufio"
+	"context"
+	"io"
+)
+
+// StreamTransport is a Transport made of an io.Reader and/or an io.Writer
+type StreamTransport struct {
+	io.Reader
+	io.Writer
+	isReadWriter bool
+	closed       bool
+}
+
+type StreamTransportFactory struct {
+	Reader       io.Reader
+	Writer       io.Writer
+	isReadWriter bool
+}
+
+func (p *StreamTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	if trans != nil {
+		t, ok := trans.(*StreamTransport)
+		if ok {
+			if t.isReadWriter {
+				return NewStreamTransportRW(t.Reader.(io.ReadWriter)), nil
+			}
+			if t.Reader != nil && t.Writer != nil {
+				return NewStreamTransport(t.Reader, t.Writer), nil
+			}
+			if t.Reader != nil && t.Writer == nil {
+				return NewStreamTransportR(t.Reader), nil
+			}
+			if t.Reader == nil && t.Writer != nil {
+				return NewStreamTransportW(t.Writer), nil
+			}
+			return &StreamTransport{}, nil
+		}
+	}
+	if p.isReadWriter {
+		return NewStreamTransportRW(p.Reader.(io.ReadWriter)), nil
+	}
+	if p.Reader != nil && p.Writer != nil {
+		return NewStreamTransport(p.Reader, p.Writer), nil
+	}
+	if p.Reader != nil && p.Writer == nil {
+		return NewStreamTransportR(p.Reader), nil
+	}
+	if p.Reader == nil && p.Writer != nil {
+		return NewStreamTransportW(p.Writer), nil
+	}
+	return &StreamTransport{}, nil
+}
+
+func NewStreamTransportFactory(reader io.Reader, writer io.Writer, isReadWriter bool) *StreamTransportFactory {
+	return &StreamTransportFactory{Reader: reader, Writer: writer, isReadWriter: isReadWriter}
+}
+
+func NewStreamTransport(r io.Reader, w io.Writer) *StreamTransport {
+	return &StreamTransport{Reader: bufio.NewReader(r), Writer: bufio.NewWriter(w)}
+}
+
+func NewStreamTransportR(r io.Reader) *StreamTransport {
+	return &StreamTransport{Reader: bufio.NewReader(r)}
+}
+
+func NewStreamTransportW(w io.Writer) *StreamTransport {
+	return &StreamTransport{Writer: bufio.NewWriter(w)}
+}
+
+func NewStreamTransportRW(rw io.ReadWriter) *StreamTransport {
+	bufrw := bufio.NewReadWriter(bufio.NewReader(rw), bufio.NewWriter(rw))
+	return &StreamTransport{Reader: bufrw, Writer: bufrw, isReadWriter: true}
+}
+
+func (p *StreamTransport) IsOpen() bool {
+	return !p.closed
+}
+
+// implicitly opened on creation, can't be reopened once closed
+func (p *StreamTransport) Open() error {
+	if !p.closed {
+		return NewTTransportException(ALREADY_OPEN, "StreamTransport already open.")
+	} else {
+		return NewTTransportException(NOT_OPEN, "cannot reopen StreamTransport.")
+	}
+}
+
+// Closes both the input and output streams.
+func (p *StreamTransport) Close() error {
+	if p.closed {
+		return NewTTransportException(NOT_OPEN, "StreamTransport already closed.")
+	}
+	p.closed = true
+	closedReader := false
+	if p.Reader != nil {
+		c, ok := p.Reader.(io.Closer)
+		if ok {
+			e := c.Close()
+			closedReader = true
+			if e != nil {
+				return e
+			}
+		}
+		p.Reader = nil
+	}
+	if p.Writer != nil && (!closedReader || !p.isReadWriter) {
+		c, ok := p.Writer.(io.Closer)
+		if ok {
+			e := c.Close()
+			if e != nil {
+				return e
+			}
+		}
+		p.Writer = nil
+	}
+	return nil
+}
+
+// Flushes the underlying output stream if not null.
+func (p *StreamTransport) Flush(ctx context.Context) error {
+	if p.Writer == nil {
+		return NewTTransportException(NOT_OPEN, "Cannot flush null outputStream")
+	}
+	f, ok := p.Writer.(Flusher)
+	if ok {
+		err := f.Flush()
+		if err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+	}
+	return nil
+}
+
+func (p *StreamTransport) Read(c []byte) (n int, err error) {
+	n, err = p.Reader.Read(c)
+	if err != nil {
+		err = NewTTransportExceptionFromError(err)
+	}
+	return
+}
+
+func (p *StreamTransport) ReadByte() (c byte, err error) {
+	f, ok := p.Reader.(io.ByteReader)
+	if ok {
+		c, err = f.ReadByte()
+	} else {
+		c, err = readByte(p.Reader)
+	}
+	if err != nil {
+		err = NewTTransportExceptionFromError(err)
+	}
+	return
+}
+
+func (p *StreamTransport) Write(c []byte) (n int, err error) {
+	n, err = p.Writer.Write(c)
+	if err != nil {
+		err = NewTTransportExceptionFromError(err)
+	}
+	return
+}
+
+func (p *StreamTransport) WriteByte(c byte) (err error) {
+	f, ok := p.Writer.(io.ByteWriter)
+	if ok {
+		err = f.WriteByte(c)
+	} else {
+		err = writeByte(p.Writer, c)
+	}
+	if err != nil {
+		err = NewTTransportExceptionFromError(err)
+	}
+	return
+}
+
+func (p *StreamTransport) WriteString(s string) (n int, err error) {
+	f, ok := p.Writer.(stringWriter)
+	if ok {
+		n, err = f.WriteString(s)
+	} else {
+		n, err = p.Writer.Write([]byte(s))
+	}
+	if err != nil {
+		err = NewTTransportExceptionFromError(err)
+	}
+	return
+}
+
+func (p *StreamTransport) RemainingBytes() (num_bytes uint64) {
+	const maxSize = ^uint64(0)
+	return maxSize // the thruth is, we just don't know unless framed is used
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/json_protocol.go

@@ -0,0 +1,584 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+)
+
+const (
+	THRIFT_JSON_PROTOCOL_VERSION = 1
+)
+
+// for references to _ParseContext see tsimplejson_protocol.go
+
+// JSON protocol implementation for thrift.
+//
+// This protocol produces/consumes a simple output format
+// suitable for parsing by scripting languages.  It should not be
+// confused with the full-featured TJSONProtocol.
+//
+type TJSONProtocol struct {
+	*TSimpleJSONProtocol
+}
+
+// Constructor
+func NewTJSONProtocol(t TTransport) *TJSONProtocol {
+	v := &TJSONProtocol{TSimpleJSONProtocol: NewTSimpleJSONProtocol(t)}
+	v.parseContextStack = append(v.parseContextStack, int(_CONTEXT_IN_TOPLEVEL))
+	v.dumpContext = append(v.dumpContext, int(_CONTEXT_IN_TOPLEVEL))
+	return v
+}
+
+// Factory
+type TJSONProtocolFactory struct{}
+
+func (p *TJSONProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return NewTJSONProtocol(trans)
+}
+
+func NewTJSONProtocolFactory() *TJSONProtocolFactory {
+	return &TJSONProtocolFactory{}
+}
+
+func (p *TJSONProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
+	p.resetContextStack() // THRIFT-3735
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	if e := p.WriteI32(THRIFT_JSON_PROTOCOL_VERSION); e != nil {
+		return e
+	}
+	if e := p.WriteString(name); e != nil {
+		return e
+	}
+	if e := p.WriteByte(int8(typeId)); e != nil {
+		return e
+	}
+	if e := p.WriteI32(seqId); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TJSONProtocol) WriteMessageEnd() error {
+	return p.OutputListEnd()
+}
+
+func (p *TJSONProtocol) WriteStructBegin(name string) error {
+	if e := p.OutputObjectBegin(); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TJSONProtocol) WriteStructEnd() error {
+	return p.OutputObjectEnd()
+}
+
+func (p *TJSONProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
+	if e := p.WriteI16(id); e != nil {
+		return e
+	}
+	if e := p.OutputObjectBegin(); e != nil {
+		return e
+	}
+	s, e1 := p.TypeIdToString(typeId)
+	if e1 != nil {
+		return e1
+	}
+	if e := p.WriteString(s); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TJSONProtocol) WriteFieldEnd() error {
+	return p.OutputObjectEnd()
+}
+
+func (p *TJSONProtocol) WriteFieldStop() error { return nil }
+
+func (p *TJSONProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	s, e1 := p.TypeIdToString(keyType)
+	if e1 != nil {
+		return e1
+	}
+	if e := p.WriteString(s); e != nil {
+		return e
+	}
+	s, e1 = p.TypeIdToString(valueType)
+	if e1 != nil {
+		return e1
+	}
+	if e := p.WriteString(s); e != nil {
+		return e
+	}
+	if e := p.WriteI64(int64(size)); e != nil {
+		return e
+	}
+	return p.OutputObjectBegin()
+}
+
+func (p *TJSONProtocol) WriteMapEnd() error {
+	if e := p.OutputObjectEnd(); e != nil {
+		return e
+	}
+	return p.OutputListEnd()
+}
+
+func (p *TJSONProtocol) WriteListBegin(elemType TType, size int) error {
+	return p.OutputElemListBegin(elemType, size)
+}
+
+func (p *TJSONProtocol) WriteListEnd() error {
+	return p.OutputListEnd()
+}
+
+func (p *TJSONProtocol) WriteSetBegin(elemType TType, size int) error {
+	return p.OutputElemListBegin(elemType, size)
+}
+
+func (p *TJSONProtocol) WriteSetEnd() error {
+	return p.OutputListEnd()
+}
+
+func (p *TJSONProtocol) WriteBool(b bool) error {
+	if b {
+		return p.WriteI32(1)
+	}
+	return p.WriteI32(0)
+}
+
+func (p *TJSONProtocol) WriteByte(b int8) error {
+	return p.WriteI32(int32(b))
+}
+
+func (p *TJSONProtocol) WriteI16(v int16) error {
+	return p.WriteI32(int32(v))
+}
+
+func (p *TJSONProtocol) WriteI32(v int32) error {
+	return p.OutputI64(int64(v))
+}
+
+func (p *TJSONProtocol) WriteI64(v int64) error {
+	return p.OutputI64(int64(v))
+}
+
+func (p *TJSONProtocol) WriteDouble(v float64) error {
+	return p.OutputF64(v)
+}
+
+func (p *TJSONProtocol) WriteString(v string) error {
+	return p.OutputString(v)
+}
+
+func (p *TJSONProtocol) WriteBinary(v []byte) error {
+	// JSON library only takes in a string,
+	// not an arbitrary byte array, to ensure bytes are transmitted
+	// efficiently we must convert this into a valid JSON string
+	// therefore we use base64 encoding to avoid excessive escaping/quoting
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_QUOTE_BYTES); e != nil {
+		return NewTProtocolException(e)
+	}
+	writer := base64.NewEncoder(base64.StdEncoding, p.writer)
+	if _, e := writer.Write(v); e != nil {
+		p.writer.Reset(p.trans) // THRIFT-3735
+		return NewTProtocolException(e)
+	}
+	if e := writer.Close(); e != nil {
+		return NewTProtocolException(e)
+	}
+	if _, e := p.write(JSON_QUOTE_BYTES); e != nil {
+		return NewTProtocolException(e)
+	}
+	return p.OutputPostValue()
+}
+
+// Reading methods.
+func (p *TJSONProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
+	p.resetContextStack() // THRIFT-3735
+	if isNull, err := p.ParseListBegin(); isNull || err != nil {
+		return name, typeId, seqId, err
+	}
+	version, err := p.ReadI32()
+	if err != nil {
+		return name, typeId, seqId, err
+	}
+	if version != THRIFT_JSON_PROTOCOL_VERSION {
+		e := fmt.Errorf("Unknown Protocol version %d, expected version %d", version, THRIFT_JSON_PROTOCOL_VERSION)
+		return name, typeId, seqId, NewTProtocolExceptionWithType(INVALID_DATA, e)
+
+	}
+	if name, err = p.ReadString(); err != nil {
+		return name, typeId, seqId, err
+	}
+	bTypeId, err := p.ReadByte()
+	typeId = TMessageType(bTypeId)
+	if err != nil {
+		return name, typeId, seqId, err
+	}
+	if seqId, err = p.ReadI32(); err != nil {
+		return name, typeId, seqId, err
+	}
+	return name, typeId, seqId, nil
+}
+
+func (p *TJSONProtocol) ReadMessageEnd() error {
+	err := p.ParseListEnd()
+	return err
+}
+
+func (p *TJSONProtocol) ReadStructBegin() (name string, err error) {
+	_, err = p.ParseObjectStart()
+	return "", err
+}
+
+func (p *TJSONProtocol) ReadStructEnd() error {
+	return p.ParseObjectEnd()
+}
+
+func (p *TJSONProtocol) ReadFieldBegin() (string, TType, int16, error) {
+	b, _ := p.reader.Peek(1)
+	if len(b) < 1 || b[0] == JSON_RBRACE[0] || b[0] == JSON_RBRACKET[0] {
+		return "", STOP, -1, nil
+	}
+	fieldId, err := p.ReadI16()
+	if err != nil {
+		return "", STOP, fieldId, err
+	}
+	if _, err = p.ParseObjectStart(); err != nil {
+		return "", STOP, fieldId, err
+	}
+	sType, err := p.ReadString()
+	if err != nil {
+		return "", STOP, fieldId, err
+	}
+	fType, err := p.StringToTypeId(sType)
+	return "", fType, fieldId, err
+}
+
+func (p *TJSONProtocol) ReadFieldEnd() error {
+	return p.ParseObjectEnd()
+}
+
+func (p *TJSONProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, e error) {
+	if isNull, e := p.ParseListBegin(); isNull || e != nil {
+		return VOID, VOID, 0, e
+	}
+
+	// read keyType
+	sKeyType, e := p.ReadString()
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+	keyType, e = p.StringToTypeId(sKeyType)
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+
+	// read valueType
+	sValueType, e := p.ReadString()
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+	valueType, e = p.StringToTypeId(sValueType)
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+
+	// read size
+	iSize, e := p.ReadI64()
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+	size = int(iSize)
+
+	_, e = p.ParseObjectStart()
+	return keyType, valueType, size, e
+}
+
+func (p *TJSONProtocol) ReadMapEnd() error {
+	e := p.ParseObjectEnd()
+	if e != nil {
+		return e
+	}
+	return p.ParseListEnd()
+}
+
+func (p *TJSONProtocol) ReadListBegin() (elemType TType, size int, e error) {
+	return p.ParseElemListBegin()
+}
+
+func (p *TJSONProtocol) ReadListEnd() error {
+	return p.ParseListEnd()
+}
+
+func (p *TJSONProtocol) ReadSetBegin() (elemType TType, size int, e error) {
+	return p.ParseElemListBegin()
+}
+
+func (p *TJSONProtocol) ReadSetEnd() error {
+	return p.ParseListEnd()
+}
+
+func (p *TJSONProtocol) ReadBool() (bool, error) {
+	value, err := p.ReadI32()
+	return (value != 0), err
+}
+
+func (p *TJSONProtocol) ReadByte() (int8, error) {
+	v, err := p.ReadI64()
+	return int8(v), err
+}
+
+func (p *TJSONProtocol) ReadI16() (int16, error) {
+	v, err := p.ReadI64()
+	return int16(v), err
+}
+
+func (p *TJSONProtocol) ReadI32() (int32, error) {
+	v, err := p.ReadI64()
+	return int32(v), err
+}
+
+func (p *TJSONProtocol) ReadI64() (int64, error) {
+	v, _, err := p.ParseI64()
+	return v, err
+}
+
+func (p *TJSONProtocol) ReadDouble() (float64, error) {
+	v, _, err := p.ParseF64()
+	return v, err
+}
+
+func (p *TJSONProtocol) ReadString() (string, error) {
+	var v string
+	if err := p.ParsePreValue(); err != nil {
+		return v, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 && f[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+		value, err := p.ParseStringBody()
+		v = value
+		if err != nil {
+			return v, err
+		}
+	} else if len(f) > 0 && f[0] == JSON_NULL[0] {
+		b := make([]byte, len(JSON_NULL))
+		_, err := p.reader.Read(b)
+		if err != nil {
+			return v, NewTProtocolException(err)
+		}
+		if string(b) != string(JSON_NULL) {
+			e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(b))
+			return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	} else {
+		e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(f))
+		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return v, p.ParsePostValue()
+}
+
+func (p *TJSONProtocol) ReadBinary() ([]byte, error) {
+	var v []byte
+	if err := p.ParsePreValue(); err != nil {
+		return nil, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 && f[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+		value, err := p.ParseBase64EncodedBody()
+		v = value
+		if err != nil {
+			return v, err
+		}
+	} else if len(f) > 0 && f[0] == JSON_NULL[0] {
+		b := make([]byte, len(JSON_NULL))
+		_, err := p.reader.Read(b)
+		if err != nil {
+			return v, NewTProtocolException(err)
+		}
+		if string(b) != string(JSON_NULL) {
+			e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(b))
+			return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	} else {
+		e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(f))
+		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+
+	return v, p.ParsePostValue()
+}
+
+func (p *TJSONProtocol) Flush(ctx context.Context) (err error) {
+	err = p.writer.Flush()
+	if err == nil {
+		err = p.trans.Flush(ctx)
+	}
+	return NewTProtocolException(err)
+}
+
+func (p *TJSONProtocol) Skip(fieldType TType) (err error) {
+	return SkipDefaultDepth(p, fieldType)
+}
+
+func (p *TJSONProtocol) Transport() TTransport {
+	return p.trans
+}
+
+func (p *TJSONProtocol) OutputElemListBegin(elemType TType, size int) error {
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	s, e1 := p.TypeIdToString(elemType)
+	if e1 != nil {
+		return e1
+	}
+	if e := p.WriteString(s); e != nil {
+		return e
+	}
+	if e := p.WriteI64(int64(size)); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TJSONProtocol) ParseElemListBegin() (elemType TType, size int, e error) {
+	if isNull, e := p.ParseListBegin(); isNull || e != nil {
+		return VOID, 0, e
+	}
+	sElemType, err := p.ReadString()
+	if err != nil {
+		return VOID, size, err
+	}
+	elemType, err = p.StringToTypeId(sElemType)
+	if err != nil {
+		return elemType, size, err
+	}
+	nSize, err2 := p.ReadI64()
+	size = int(nSize)
+	return elemType, size, err2
+}
+
+func (p *TJSONProtocol) readElemListBegin() (elemType TType, size int, e error) {
+	if isNull, e := p.ParseListBegin(); isNull || e != nil {
+		return VOID, 0, e
+	}
+	sElemType, err := p.ReadString()
+	if err != nil {
+		return VOID, size, err
+	}
+	elemType, err = p.StringToTypeId(sElemType)
+	if err != nil {
+		return elemType, size, err
+	}
+	nSize, err2 := p.ReadI64()
+	size = int(nSize)
+	return elemType, size, err2
+}
+
+func (p *TJSONProtocol) writeElemListBegin(elemType TType, size int) error {
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	s, e1 := p.TypeIdToString(elemType)
+	if e1 != nil {
+		return e1
+	}
+	if e := p.OutputString(s); e != nil {
+		return e
+	}
+	if e := p.OutputI64(int64(size)); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TJSONProtocol) TypeIdToString(fieldType TType) (string, error) {
+	switch byte(fieldType) {
+	case BOOL:
+		return "tf", nil
+	case BYTE:
+		return "i8", nil
+	case I16:
+		return "i16", nil
+	case I32:
+		return "i32", nil
+	case I64:
+		return "i64", nil
+	case DOUBLE:
+		return "dbl", nil
+	case STRING:
+		return "str", nil
+	case STRUCT:
+		return "rec", nil
+	case MAP:
+		return "map", nil
+	case SET:
+		return "set", nil
+	case LIST:
+		return "lst", nil
+	}
+
+	e := fmt.Errorf("Unknown fieldType: %d", int(fieldType))
+	return "", NewTProtocolExceptionWithType(INVALID_DATA, e)
+}
+
+func (p *TJSONProtocol) StringToTypeId(fieldType string) (TType, error) {
+	switch fieldType {
+	case "tf":
+		return TType(BOOL), nil
+	case "i8":
+		return TType(BYTE), nil
+	case "i16":
+		return TType(I16), nil
+	case "i32":
+		return TType(I32), nil
+	case "i64":
+		return TType(I64), nil
+	case "dbl":
+		return TType(DOUBLE), nil
+	case "str":
+		return TType(STRING), nil
+	case "rec":
+		return TType(STRUCT), nil
+	case "map":
+		return TType(MAP), nil
+	case "set":
+		return TType(SET), nil
+	case "lst":
+		return TType(LIST), nil
+	}
+
+	e := fmt.Errorf("Unknown type identifier: %s", fieldType)
+	return TType(STOP), NewTProtocolExceptionWithType(INVALID_DATA, e)
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/memory_buffer.go

@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bytes"
+	"context"
+)
+
+// Memory buffer-based implementation of the TTransport interface.
+type TMemoryBuffer struct {
+	*bytes.Buffer
+	size int
+}
+
+type TMemoryBufferTransportFactory struct {
+	size int
+}
+
+func (p *TMemoryBufferTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	if trans != nil {
+		t, ok := trans.(*TMemoryBuffer)
+		if ok && t.size > 0 {
+			return NewTMemoryBufferLen(t.size), nil
+		}
+	}
+	return NewTMemoryBufferLen(p.size), nil
+}
+
+func NewTMemoryBufferTransportFactory(size int) *TMemoryBufferTransportFactory {
+	return &TMemoryBufferTransportFactory{size: size}
+}
+
+func NewTMemoryBuffer() *TMemoryBuffer {
+	return &TMemoryBuffer{Buffer: &bytes.Buffer{}, size: 0}
+}
+
+func NewTMemoryBufferLen(size int) *TMemoryBuffer {
+	buf := make([]byte, 0, size)
+	return &TMemoryBuffer{Buffer: bytes.NewBuffer(buf), size: size}
+}
+
+func (p *TMemoryBuffer) IsOpen() bool {
+	return true
+}
+
+func (p *TMemoryBuffer) Open() error {
+	return nil
+}
+
+func (p *TMemoryBuffer) Close() error {
+	p.Buffer.Reset()
+	return nil
+}
+
+// Flushing a memory buffer is a no-op
+func (p *TMemoryBuffer) Flush(ctx context.Context) error {
+	return nil
+}
+
+func (p *TMemoryBuffer) RemainingBytes() (num_bytes uint64) {
+	return uint64(p.Buffer.Len())
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/messagetype.go

@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Message type constants in the Thrift protocol.
+type TMessageType int32
+
+const (
+	INVALID_TMESSAGE_TYPE TMessageType = 0
+	CALL                  TMessageType = 1
+	REPLY                 TMessageType = 2
+	EXCEPTION             TMessageType = 3
+	ONEWAY                TMessageType = 4
+)

vendor/git.apache.org/thrift.git/lib/go/thrift/multiplexed_protocol.go

@@ -0,0 +1,170 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"fmt"
+	"strings"
+)
+
+/*
+TMultiplexedProtocol is a protocol-independent concrete decorator
+that allows a Thrift client to communicate with a multiplexing Thrift server,
+by prepending the service name to the function name during function calls.
+
+NOTE: THIS IS NOT USED BY SERVERS.  On the server, use TMultiplexedProcessor to handle request
+from a multiplexing client.
+
+This example uses a single socket transport to invoke two services:
+
+socket := thrift.NewTSocketFromAddrTimeout(addr, TIMEOUT)
+transport := thrift.NewTFramedTransport(socket)
+protocol := thrift.NewTBinaryProtocolTransport(transport)
+
+mp := thrift.NewTMultiplexedProtocol(protocol, "Calculator")
+service := Calculator.NewCalculatorClient(mp)
+
+mp2 := thrift.NewTMultiplexedProtocol(protocol, "WeatherReport")
+service2 := WeatherReport.NewWeatherReportClient(mp2)
+
+err := transport.Open()
+if err != nil {
+	t.Fatal("Unable to open client socket", err)
+}
+
+fmt.Println(service.Add(2,2))
+fmt.Println(service2.GetTemperature())
+*/
+
+type TMultiplexedProtocol struct {
+	TProtocol
+	serviceName string
+}
+
+const MULTIPLEXED_SEPARATOR = ":"
+
+func NewTMultiplexedProtocol(protocol TProtocol, serviceName string) *TMultiplexedProtocol {
+	return &TMultiplexedProtocol{
+		TProtocol:   protocol,
+		serviceName: serviceName,
+	}
+}
+
+func (t *TMultiplexedProtocol) WriteMessageBegin(name string, typeId TMessageType, seqid int32) error {
+	if typeId == CALL || typeId == ONEWAY {
+		return t.TProtocol.WriteMessageBegin(t.serviceName+MULTIPLEXED_SEPARATOR+name, typeId, seqid)
+	} else {
+		return t.TProtocol.WriteMessageBegin(name, typeId, seqid)
+	}
+}
+
+/*
+TMultiplexedProcessor is a TProcessor allowing
+a single TServer to provide multiple services.
+
+To do so, you instantiate the processor and then register additional
+processors with it, as shown in the following example:
+
+var processor = thrift.NewTMultiplexedProcessor()
+
+firstProcessor :=
+processor.RegisterProcessor("FirstService", firstProcessor)
+
+processor.registerProcessor(
+  "Calculator",
+  Calculator.NewCalculatorProcessor(&CalculatorHandler{}),
+)
+
+processor.registerProcessor(
+  "WeatherReport",
+  WeatherReport.NewWeatherReportProcessor(&WeatherReportHandler{}),
+)
+
+serverTransport, err := thrift.NewTServerSocketTimeout(addr, TIMEOUT)
+if err != nil {
+  t.Fatal("Unable to create server socket", err)
+}
+server := thrift.NewTSimpleServer2(processor, serverTransport)
+server.Serve();
+*/
+
+type TMultiplexedProcessor struct {
+	serviceProcessorMap map[string]TProcessor
+	DefaultProcessor    TProcessor
+}
+
+func NewTMultiplexedProcessor() *TMultiplexedProcessor {
+	return &TMultiplexedProcessor{
+		serviceProcessorMap: make(map[string]TProcessor),
+	}
+}
+
+func (t *TMultiplexedProcessor) RegisterDefault(processor TProcessor) {
+	t.DefaultProcessor = processor
+}
+
+func (t *TMultiplexedProcessor) RegisterProcessor(name string, processor TProcessor) {
+	if t.serviceProcessorMap == nil {
+		t.serviceProcessorMap = make(map[string]TProcessor)
+	}
+	t.serviceProcessorMap[name] = processor
+}
+
+func (t *TMultiplexedProcessor) Process(ctx context.Context, in, out TProtocol) (bool, TException) {
+	name, typeId, seqid, err := in.ReadMessageBegin()
+	if err != nil {
+		return false, err
+	}
+	if typeId != CALL && typeId != ONEWAY {
+		return false, fmt.Errorf("Unexpected message type %v", typeId)
+	}
+	//extract the service name
+	v := strings.SplitN(name, MULTIPLEXED_SEPARATOR, 2)
+	if len(v) != 2 {
+		if t.DefaultProcessor != nil {
+			smb := NewStoredMessageProtocol(in, name, typeId, seqid)
+			return t.DefaultProcessor.Process(ctx, smb, out)
+		}
+		return false, fmt.Errorf("Service name not found in message name: %s.  Did you forget to use a TMultiplexProtocol in your client?", name)
+	}
+	actualProcessor, ok := t.serviceProcessorMap[v[0]]
+	if !ok {
+		return false, fmt.Errorf("Service name not found: %s.  Did you forget to call registerProcessor()?", v[0])
+	}
+	smb := NewStoredMessageProtocol(in, v[1], typeId, seqid)
+	return actualProcessor.Process(ctx, smb, out)
+}
+
+//Protocol that use stored message for ReadMessageBegin
+type storedMessageProtocol struct {
+	TProtocol
+	name   string
+	typeId TMessageType
+	seqid  int32
+}
+
+func NewStoredMessageProtocol(protocol TProtocol, name string, typeId TMessageType, seqid int32) *storedMessageProtocol {
+	return &storedMessageProtocol{protocol, name, typeId, seqid}
+}
+
+func (s *storedMessageProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqid int32, err error) {
+	return s.name, s.typeId, s.seqid, nil
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/numeric.go

@@ -0,0 +1,164 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"math"
+	"strconv"
+)
+
+type Numeric interface {
+	Int64() int64
+	Int32() int32
+	Int16() int16
+	Byte() byte
+	Int() int
+	Float64() float64
+	Float32() float32
+	String() string
+	isNull() bool
+}
+
+type numeric struct {
+	iValue int64
+	dValue float64
+	sValue string
+	isNil  bool
+}
+
+var (
+	INFINITY          Numeric
+	NEGATIVE_INFINITY Numeric
+	NAN               Numeric
+	ZERO              Numeric
+	NUMERIC_NULL      Numeric
+)
+
+func NewNumericFromDouble(dValue float64) Numeric {
+	if math.IsInf(dValue, 1) {
+		return INFINITY
+	}
+	if math.IsInf(dValue, -1) {
+		return NEGATIVE_INFINITY
+	}
+	if math.IsNaN(dValue) {
+		return NAN
+	}
+	iValue := int64(dValue)
+	sValue := strconv.FormatFloat(dValue, 'g', 10, 64)
+	isNil := false
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromI64(iValue int64) Numeric {
+	dValue := float64(iValue)
+	sValue := string(iValue)
+	isNil := false
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromI32(iValue int32) Numeric {
+	dValue := float64(iValue)
+	sValue := string(iValue)
+	isNil := false
+	return &numeric{iValue: int64(iValue), dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromString(sValue string) Numeric {
+	if sValue == INFINITY.String() {
+		return INFINITY
+	}
+	if sValue == NEGATIVE_INFINITY.String() {
+		return NEGATIVE_INFINITY
+	}
+	if sValue == NAN.String() {
+		return NAN
+	}
+	iValue, _ := strconv.ParseInt(sValue, 10, 64)
+	dValue, _ := strconv.ParseFloat(sValue, 64)
+	isNil := len(sValue) == 0
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromJSONString(sValue string, isNull bool) Numeric {
+	if isNull {
+		return NewNullNumeric()
+	}
+	if sValue == JSON_INFINITY {
+		return INFINITY
+	}
+	if sValue == JSON_NEGATIVE_INFINITY {
+		return NEGATIVE_INFINITY
+	}
+	if sValue == JSON_NAN {
+		return NAN
+	}
+	iValue, _ := strconv.ParseInt(sValue, 10, 64)
+	dValue, _ := strconv.ParseFloat(sValue, 64)
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNull}
+}
+
+func NewNullNumeric() Numeric {
+	return &numeric{iValue: 0, dValue: 0.0, sValue: "", isNil: true}
+}
+
+func (p *numeric) Int64() int64 {
+	return p.iValue
+}
+
+func (p *numeric) Int32() int32 {
+	return int32(p.iValue)
+}
+
+func (p *numeric) Int16() int16 {
+	return int16(p.iValue)
+}
+
+func (p *numeric) Byte() byte {
+	return byte(p.iValue)
+}
+
+func (p *numeric) Int() int {
+	return int(p.iValue)
+}
+
+func (p *numeric) Float64() float64 {
+	return p.dValue
+}
+
+func (p *numeric) Float32() float32 {
+	return float32(p.dValue)
+}
+
+func (p *numeric) String() string {
+	return p.sValue
+}
+
+func (p *numeric) isNull() bool {
+	return p.isNil
+}
+
+func init() {
+	INFINITY = &numeric{iValue: 0, dValue: math.Inf(1), sValue: "Infinity", isNil: false}
+	NEGATIVE_INFINITY = &numeric{iValue: 0, dValue: math.Inf(-1), sValue: "-Infinity", isNil: false}
+	NAN = &numeric{iValue: 0, dValue: math.NaN(), sValue: "NaN", isNil: false}
+	ZERO = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: false}
+	NUMERIC_NULL = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: true}
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/pointerize.go

@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+///////////////////////////////////////////////////////////////////////////////
+// This file is home to helpers that convert from various base types to
+// respective pointer types. This is necessary because Go does not permit
+// references to constants, nor can a pointer type to base type be allocated
+// and initialized in a single expression.
+//
+// E.g., this is not allowed:
+//
+//    var ip *int = &5
+//
+// But this *is* allowed:
+//
+//    func IntPtr(i int) *int { return &i }
+//    var ip *int = IntPtr(5)
+//
+// Since pointers to base types are commonplace as [optional] fields in
+// exported thrift structs, we factor such helpers here.
+///////////////////////////////////////////////////////////////////////////////
+
+func Float32Ptr(v float32) *float32 { return &v }
+func Float64Ptr(v float64) *float64 { return &v }
+func IntPtr(v int) *int             { return &v }
+func Int32Ptr(v int32) *int32       { return &v }
+func Int64Ptr(v int64) *int64       { return &v }
+func StringPtr(v string) *string    { return &v }
+func Uint32Ptr(v uint32) *uint32    { return &v }
+func Uint64Ptr(v uint64) *uint64    { return &v }
+func BoolPtr(v bool) *bool          { return &v }
+func ByteSlicePtr(v []byte) *[]byte { return &v }

vendor/git.apache.org/thrift.git/lib/go/thrift/processor_factory.go

@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import "context"
+
+// A processor is a generic object which operates upon an input stream and
+// writes to some output stream.
+type TProcessor interface {
+	Process(ctx context.Context, in, out TProtocol) (bool, TException)
+}
+
+type TProcessorFunction interface {
+	Process(ctx context.Context, seqId int32, in, out TProtocol) (bool, TException)
+}
+
+// The default processor factory just returns a singleton
+// instance.
+type TProcessorFactory interface {
+	GetProcessor(trans TTransport) TProcessor
+}
+
+type tProcessorFactory struct {
+	processor TProcessor
+}
+
+func NewTProcessorFactory(p TProcessor) TProcessorFactory {
+	return &tProcessorFactory{processor: p}
+}
+
+func (p *tProcessorFactory) GetProcessor(trans TTransport) TProcessor {
+	return p.processor
+}
+
+/**
+ * The default processor factory just returns a singleton
+ * instance.
+ */
+type TProcessorFunctionFactory interface {
+	GetProcessorFunction(trans TTransport) TProcessorFunction
+}
+
+type tProcessorFunctionFactory struct {
+	processor TProcessorFunction
+}
+
+func NewTProcessorFunctionFactory(p TProcessorFunction) TProcessorFunctionFactory {
+	return &tProcessorFunctionFactory{processor: p}
+}
+
+func (p *tProcessorFunctionFactory) GetProcessorFunction(trans TTransport) TProcessorFunction {
+	return p.processor
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/protocol.go

@@ -0,0 +1,179 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"errors"
+	"fmt"
+)
+
+const (
+	VERSION_MASK = 0xffff0000
+	VERSION_1    = 0x80010000
+)
+
+type TProtocol interface {
+	WriteMessageBegin(name string, typeId TMessageType, seqid int32) error
+	WriteMessageEnd() error
+	WriteStructBegin(name string) error
+	WriteStructEnd() error
+	WriteFieldBegin(name string, typeId TType, id int16) error
+	WriteFieldEnd() error
+	WriteFieldStop() error
+	WriteMapBegin(keyType TType, valueType TType, size int) error
+	WriteMapEnd() error
+	WriteListBegin(elemType TType, size int) error
+	WriteListEnd() error
+	WriteSetBegin(elemType TType, size int) error
+	WriteSetEnd() error
+	WriteBool(value bool) error
+	WriteByte(value int8) error
+	WriteI16(value int16) error
+	WriteI32(value int32) error
+	WriteI64(value int64) error
+	WriteDouble(value float64) error
+	WriteString(value string) error
+	WriteBinary(value []byte) error
+
+	ReadMessageBegin() (name string, typeId TMessageType, seqid int32, err error)
+	ReadMessageEnd() error
+	ReadStructBegin() (name string, err error)
+	ReadStructEnd() error
+	ReadFieldBegin() (name string, typeId TType, id int16, err error)
+	ReadFieldEnd() error
+	ReadMapBegin() (keyType TType, valueType TType, size int, err error)
+	ReadMapEnd() error
+	ReadListBegin() (elemType TType, size int, err error)
+	ReadListEnd() error
+	ReadSetBegin() (elemType TType, size int, err error)
+	ReadSetEnd() error
+	ReadBool() (value bool, err error)
+	ReadByte() (value int8, err error)
+	ReadI16() (value int16, err error)
+	ReadI32() (value int32, err error)
+	ReadI64() (value int64, err error)
+	ReadDouble() (value float64, err error)
+	ReadString() (value string, err error)
+	ReadBinary() (value []byte, err error)
+
+	Skip(fieldType TType) (err error)
+	Flush(ctx context.Context) (err error)
+
+	Transport() TTransport
+}
+
+// The maximum recursive depth the skip() function will traverse
+const DEFAULT_RECURSION_DEPTH = 64
+
+// Skips over the next data element from the provided input TProtocol object.
+func SkipDefaultDepth(prot TProtocol, typeId TType) (err error) {
+	return Skip(prot, typeId, DEFAULT_RECURSION_DEPTH)
+}
+
+// Skips over the next data element from the provided input TProtocol object.
+func Skip(self TProtocol, fieldType TType, maxDepth int) (err error) {
+
+	if maxDepth <= 0 {
+		return NewTProtocolExceptionWithType(DEPTH_LIMIT, errors.New("Depth limit exceeded"))
+	}
+
+	switch fieldType {
+	case STOP:
+		return
+	case BOOL:
+		_, err = self.ReadBool()
+		return
+	case BYTE:
+		_, err = self.ReadByte()
+		return
+	case I16:
+		_, err = self.ReadI16()
+		return
+	case I32:
+		_, err = self.ReadI32()
+		return
+	case I64:
+		_, err = self.ReadI64()
+		return
+	case DOUBLE:
+		_, err = self.ReadDouble()
+		return
+	case STRING:
+		_, err = self.ReadString()
+		return
+	case STRUCT:
+		if _, err = self.ReadStructBegin(); err != nil {
+			return err
+		}
+		for {
+			_, typeId, _, _ := self.ReadFieldBegin()
+			if typeId == STOP {
+				break
+			}
+			err := Skip(self, typeId, maxDepth-1)
+			if err != nil {
+				return err
+			}
+			self.ReadFieldEnd()
+		}
+		return self.ReadStructEnd()
+	case MAP:
+		keyType, valueType, size, err := self.ReadMapBegin()
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(self, keyType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+			self.Skip(valueType)
+		}
+		return self.ReadMapEnd()
+	case SET:
+		elemType, size, err := self.ReadSetBegin()
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(self, elemType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+		}
+		return self.ReadSetEnd()
+	case LIST:
+		elemType, size, err := self.ReadListBegin()
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(self, elemType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+		}
+		return self.ReadListEnd()
+	default:
+		return NewTProtocolExceptionWithType(INVALID_DATA, errors.New(fmt.Sprintf("Unknown data type %d", fieldType)))
+	}
+	return nil
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/protocol_exception.go

@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"encoding/base64"
+)
+
+// Thrift Protocol exception
+type TProtocolException interface {
+	TException
+	TypeId() int
+}
+
+const (
+	UNKNOWN_PROTOCOL_EXCEPTION = 0
+	INVALID_DATA               = 1
+	NEGATIVE_SIZE              = 2
+	SIZE_LIMIT                 = 3
+	BAD_VERSION                = 4
+	NOT_IMPLEMENTED            = 5
+	DEPTH_LIMIT                = 6
+)
+
+type tProtocolException struct {
+	typeId  int
+	message string
+}
+
+func (p *tProtocolException) TypeId() int {
+	return p.typeId
+}
+
+func (p *tProtocolException) String() string {
+	return p.message
+}
+
+func (p *tProtocolException) Error() string {
+	return p.message
+}
+
+func NewTProtocolException(err error) TProtocolException {
+	if err == nil {
+		return nil
+	}
+	if e, ok := err.(TProtocolException); ok {
+		return e
+	}
+	if _, ok := err.(base64.CorruptInputError); ok {
+		return &tProtocolException{INVALID_DATA, err.Error()}
+	}
+	return &tProtocolException{UNKNOWN_PROTOCOL_EXCEPTION, err.Error()}
+}
+
+func NewTProtocolExceptionWithType(errType int, err error) TProtocolException {
+	if err == nil {
+		return nil
+	}
+	return &tProtocolException{errType, err.Error()}
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/protocol_factory.go

@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Factory interface for constructing protocol instances.
+type TProtocolFactory interface {
+	GetProtocol(trans TTransport) TProtocol
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/rich_transport.go

@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import "io"
+
+type RichTransport struct {
+	TTransport
+}
+
+// Wraps Transport to provide TRichTransport interface
+func NewTRichTransport(trans TTransport) *RichTransport {
+	return &RichTransport{trans}
+}
+
+func (r *RichTransport) ReadByte() (c byte, err error) {
+	return readByte(r.TTransport)
+}
+
+func (r *RichTransport) WriteByte(c byte) error {
+	return writeByte(r.TTransport, c)
+}
+
+func (r *RichTransport) WriteString(s string) (n int, err error) {
+	return r.Write([]byte(s))
+}
+
+func (r *RichTransport) RemainingBytes() (num_bytes uint64) {
+	return r.TTransport.RemainingBytes()
+}
+
+func readByte(r io.Reader) (c byte, err error) {
+	v := [1]byte{0}
+	n, err := r.Read(v[0:1])
+	if n > 0 && (err == nil || err == io.EOF) {
+		return v[0], nil
+	}
+	if n > 0 && err != nil {
+		return v[0], err
+	}
+	if err != nil {
+		return 0, err
+	}
+	return v[0], nil
+}
+
+func writeByte(w io.Writer, c byte) error {
+	v := [1]byte{c}
+	_, err := w.Write(v[0:1])
+	return err
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/serializer.go

@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+)
+
+type TSerializer struct {
+	Transport *TMemoryBuffer
+	Protocol  TProtocol
+}
+
+type TStruct interface {
+	Write(p TProtocol) error
+	Read(p TProtocol) error
+}
+
+func NewTSerializer() *TSerializer {
+	transport := NewTMemoryBufferLen(1024)
+	protocol := NewTBinaryProtocolFactoryDefault().GetProtocol(transport)
+
+	return &TSerializer{
+		transport,
+		protocol}
+}
+
+func (t *TSerializer) WriteString(ctx context.Context, msg TStruct) (s string, err error) {
+	t.Transport.Reset()
+
+	if err = msg.Write(t.Protocol); err != nil {
+		return
+	}
+
+	if err = t.Protocol.Flush(ctx); err != nil {
+		return
+	}
+	if err = t.Transport.Flush(ctx); err != nil {
+		return
+	}
+
+	return t.Transport.String(), nil
+}
+
+func (t *TSerializer) Write(ctx context.Context, msg TStruct) (b []byte, err error) {
+	t.Transport.Reset()
+
+	if err = msg.Write(t.Protocol); err != nil {
+		return
+	}
+
+	if err = t.Protocol.Flush(ctx); err != nil {
+		return
+	}
+
+	if err = t.Transport.Flush(ctx); err != nil {
+		return
+	}
+
+	b = append(b, t.Transport.Bytes()...)
+	return
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/server.go

@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+type TServer interface {
+	ProcessorFactory() TProcessorFactory
+	ServerTransport() TServerTransport
+	InputTransportFactory() TTransportFactory
+	OutputTransportFactory() TTransportFactory
+	InputProtocolFactory() TProtocolFactory
+	OutputProtocolFactory() TProtocolFactory
+
+	// Starts the server
+	Serve() error
+	// Stops the server. This is optional on a per-implementation basis. Not
+	// all servers are required to be cleanly stoppable.
+	Stop() error
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/server_socket.go

@@ -0,0 +1,134 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"net"
+	"sync"
+	"time"
+)
+
+type TServerSocket struct {
+	listener      net.Listener
+	addr          net.Addr
+	clientTimeout time.Duration
+
+	// Protects the interrupted value to make it thread safe.
+	mu          sync.RWMutex
+	interrupted bool
+}
+
+func NewTServerSocket(listenAddr string) (*TServerSocket, error) {
+	return NewTServerSocketTimeout(listenAddr, 0)
+}
+
+func NewTServerSocketTimeout(listenAddr string, clientTimeout time.Duration) (*TServerSocket, error) {
+	addr, err := net.ResolveTCPAddr("tcp", listenAddr)
+	if err != nil {
+		return nil, err
+	}
+	return &TServerSocket{addr: addr, clientTimeout: clientTimeout}, nil
+}
+
+// Creates a TServerSocket from a net.Addr
+func NewTServerSocketFromAddrTimeout(addr net.Addr, clientTimeout time.Duration) *TServerSocket {
+	return &TServerSocket{addr: addr, clientTimeout: clientTimeout}
+}
+
+func (p *TServerSocket) Listen() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if p.IsListening() {
+		return nil
+	}
+	l, err := net.Listen(p.addr.Network(), p.addr.String())
+	if err != nil {
+		return err
+	}
+	p.listener = l
+	return nil
+}
+
+func (p *TServerSocket) Accept() (TTransport, error) {
+	p.mu.RLock()
+	interrupted := p.interrupted
+	p.mu.RUnlock()
+
+	if interrupted {
+		return nil, errTransportInterrupted
+	}
+
+	listener := p.listener
+	if listener == nil {
+		return nil, NewTTransportException(NOT_OPEN, "No underlying server socket")
+	}
+
+	conn, err := listener.Accept()
+	if err != nil {
+		return nil, NewTTransportExceptionFromError(err)
+	}
+	return NewTSocketFromConnTimeout(conn, p.clientTimeout), nil
+}
+
+// Checks whether the socket is listening.
+func (p *TServerSocket) IsListening() bool {
+	return p.listener != nil
+}
+
+// Connects the socket, creating a new socket object if necessary.
+func (p *TServerSocket) Open() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if p.IsListening() {
+		return NewTTransportException(ALREADY_OPEN, "Server socket already open")
+	}
+	if l, err := net.Listen(p.addr.Network(), p.addr.String()); err != nil {
+		return err
+	} else {
+		p.listener = l
+	}
+	return nil
+}
+
+func (p *TServerSocket) Addr() net.Addr {
+	if p.listener != nil {
+		return p.listener.Addr()
+	}
+	return p.addr
+}
+
+func (p *TServerSocket) Close() error {
+	defer func() {
+		p.listener = nil
+	}()
+	if p.IsListening() {
+		return p.listener.Close()
+	}
+	return nil
+}
+
+func (p *TServerSocket) Interrupt() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	p.interrupted = true
+	p.Close()
+
+	return nil
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/server_transport.go

@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Server transport. Object which provides client transports.
+type TServerTransport interface {
+	Listen() error
+	Accept() (TTransport, error)
+	Close() error
+
+	// Optional method implementation. This signals to the server transport
+	// that it should break out of any accept() or listen() that it is currently
+	// blocked on. This method, if implemented, MUST be thread safe, as it may
+	// be called from a different thread context than the other TServerTransport
+	// methods.
+	Interrupt() error
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/simple_server.go

@@ -0,0 +1,227 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"log"
+	"runtime/debug"
+	"sync"
+	"sync/atomic"
+)
+
+/*
+ * This is not a typical TSimpleServer as it is not blocked after accept a socket.
+ * It is more like a TThreadedServer that can handle different connections in different goroutines.
+ * This will work if golang user implements a conn-pool like thing in client side.
+ */
+type TSimpleServer struct {
+	closed int32
+	wg     sync.WaitGroup
+	mu     sync.Mutex
+
+	processorFactory       TProcessorFactory
+	serverTransport        TServerTransport
+	inputTransportFactory  TTransportFactory
+	outputTransportFactory TTransportFactory
+	inputProtocolFactory   TProtocolFactory
+	outputProtocolFactory  TProtocolFactory
+}
+
+func NewTSimpleServer2(processor TProcessor, serverTransport TServerTransport) *TSimpleServer {
+	return NewTSimpleServerFactory2(NewTProcessorFactory(processor), serverTransport)
+}
+
+func NewTSimpleServer4(processor TProcessor, serverTransport TServerTransport, transportFactory TTransportFactory, protocolFactory TProtocolFactory) *TSimpleServer {
+	return NewTSimpleServerFactory4(NewTProcessorFactory(processor),
+		serverTransport,
+		transportFactory,
+		protocolFactory,
+	)
+}
+
+func NewTSimpleServer6(processor TProcessor, serverTransport TServerTransport, inputTransportFactory TTransportFactory, outputTransportFactory TTransportFactory, inputProtocolFactory TProtocolFactory, outputProtocolFactory TProtocolFactory) *TSimpleServer {
+	return NewTSimpleServerFactory6(NewTProcessorFactory(processor),
+		serverTransport,
+		inputTransportFactory,
+		outputTransportFactory,
+		inputProtocolFactory,
+		outputProtocolFactory,
+	)
+}
+
+func NewTSimpleServerFactory2(processorFactory TProcessorFactory, serverTransport TServerTransport) *TSimpleServer {
+	return NewTSimpleServerFactory6(processorFactory,
+		serverTransport,
+		NewTTransportFactory(),
+		NewTTransportFactory(),
+		NewTBinaryProtocolFactoryDefault(),
+		NewTBinaryProtocolFactoryDefault(),
+	)
+}
+
+func NewTSimpleServerFactory4(processorFactory TProcessorFactory, serverTransport TServerTransport, transportFactory TTransportFactory, protocolFactory TProtocolFactory) *TSimpleServer {
+	return NewTSimpleServerFactory6(processorFactory,
+		serverTransport,
+		transportFactory,
+		transportFactory,
+		protocolFactory,
+		protocolFactory,
+	)
+}
+
+func NewTSimpleServerFactory6(processorFactory TProcessorFactory, serverTransport TServerTransport, inputTransportFactory TTransportFactory, outputTransportFactory TTransportFactory, inputProtocolFactory TProtocolFactory, outputProtocolFactory TProtocolFactory) *TSimpleServer {
+	return &TSimpleServer{
+		processorFactory:       processorFactory,
+		serverTransport:        serverTransport,
+		inputTransportFactory:  inputTransportFactory,
+		outputTransportFactory: outputTransportFactory,
+		inputProtocolFactory:   inputProtocolFactory,
+		outputProtocolFactory:  outputProtocolFactory,
+	}
+}
+
+func (p *TSimpleServer) ProcessorFactory() TProcessorFactory {
+	return p.processorFactory
+}
+
+func (p *TSimpleServer) ServerTransport() TServerTransport {
+	return p.serverTransport
+}
+
+func (p *TSimpleServer) InputTransportFactory() TTransportFactory {
+	return p.inputTransportFactory
+}
+
+func (p *TSimpleServer) OutputTransportFactory() TTransportFactory {
+	return p.outputTransportFactory
+}
+
+func (p *TSimpleServer) InputProtocolFactory() TProtocolFactory {
+	return p.inputProtocolFactory
+}
+
+func (p *TSimpleServer) OutputProtocolFactory() TProtocolFactory {
+	return p.outputProtocolFactory
+}
+
+func (p *TSimpleServer) Listen() error {
+	return p.serverTransport.Listen()
+}
+
+func (p *TSimpleServer) innerAccept() (int32, error) {
+	client, err := p.serverTransport.Accept()
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	closed := atomic.LoadInt32(&p.closed)
+	if closed != 0 {
+		return closed, nil
+	}
+	if err != nil {
+		return 0, err
+	}
+	if client != nil {
+		p.wg.Add(1)
+		go func() {
+			defer p.wg.Done()
+			if err := p.processRequests(client); err != nil {
+				log.Println("error processing request:", err)
+			}
+		}()
+	}
+	return 0, nil
+}
+
+func (p *TSimpleServer) AcceptLoop() error {
+	for {
+		closed, err := p.innerAccept()
+		if err != nil {
+			return err
+		}
+		if closed != 0 {
+			return nil
+		}
+	}
+}
+
+func (p *TSimpleServer) Serve() error {
+	err := p.Listen()
+	if err != nil {
+		return err
+	}
+	p.AcceptLoop()
+	return nil
+}
+
+func (p *TSimpleServer) Stop() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if atomic.LoadInt32(&p.closed) != 0 {
+		return nil
+	}
+	atomic.StoreInt32(&p.closed, 1)
+	p.serverTransport.Interrupt()
+	p.wg.Wait()
+	return nil
+}
+
+func (p *TSimpleServer) processRequests(client TTransport) error {
+	processor := p.processorFactory.GetProcessor(client)
+	inputTransport, err := p.inputTransportFactory.GetTransport(client)
+	if err != nil {
+		return err
+	}
+	outputTransport, err := p.outputTransportFactory.GetTransport(client)
+	if err != nil {
+		return err
+	}
+	inputProtocol := p.inputProtocolFactory.GetProtocol(inputTransport)
+	outputProtocol := p.outputProtocolFactory.GetProtocol(outputTransport)
+	defer func() {
+		if e := recover(); e != nil {
+			log.Printf("panic in processor: %s: %s", e, debug.Stack())
+		}
+	}()
+
+	if inputTransport != nil {
+		defer inputTransport.Close()
+	}
+	if outputTransport != nil {
+		defer outputTransport.Close()
+	}
+	for {
+		if atomic.LoadInt32(&p.closed) != 0 {
+			return nil
+		}
+
+		ok, err := processor.Process(defaultCtx, inputProtocol, outputProtocol)
+		if err, ok := err.(TTransportException); ok && err.TypeId() == END_OF_FILE {
+			return nil
+		} else if err != nil {
+			return err
+		}
+		if err, ok := err.(TApplicationException); ok && err.TypeId() == UNKNOWN_METHOD {
+			continue
+		}
+		if !ok {
+			break
+		}
+	}
+	return nil
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/socket.go

@@ -0,0 +1,166 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"net"
+	"time"
+)
+
+type TSocket struct {
+	conn    net.Conn
+	addr    net.Addr
+	timeout time.Duration
+}
+
+// NewTSocket creates a net.Conn-backed TTransport, given a host and port
+//
+// Example:
+// 	trans, err := thrift.NewTSocket("localhost:9090")
+func NewTSocket(hostPort string) (*TSocket, error) {
+	return NewTSocketTimeout(hostPort, 0)
+}
+
+// NewTSocketTimeout creates a net.Conn-backed TTransport, given a host and port
+// it also accepts a timeout as a time.Duration
+func NewTSocketTimeout(hostPort string, timeout time.Duration) (*TSocket, error) {
+	//conn, err := net.DialTimeout(network, address, timeout)
+	addr, err := net.ResolveTCPAddr("tcp", hostPort)
+	if err != nil {
+		return nil, err
+	}
+	return NewTSocketFromAddrTimeout(addr, timeout), nil
+}
+
+// Creates a TSocket from a net.Addr
+func NewTSocketFromAddrTimeout(addr net.Addr, timeout time.Duration) *TSocket {
+	return &TSocket{addr: addr, timeout: timeout}
+}
+
+// Creates a TSocket from an existing net.Conn
+func NewTSocketFromConnTimeout(conn net.Conn, timeout time.Duration) *TSocket {
+	return &TSocket{conn: conn, addr: conn.RemoteAddr(), timeout: timeout}
+}
+
+// Sets the socket timeout
+func (p *TSocket) SetTimeout(timeout time.Duration) error {
+	p.timeout = timeout
+	return nil
+}
+
+func (p *TSocket) pushDeadline(read, write bool) {
+	var t time.Time
+	if p.timeout > 0 {
+		t = time.Now().Add(time.Duration(p.timeout))
+	}
+	if read && write {
+		p.conn.SetDeadline(t)
+	} else if read {
+		p.conn.SetReadDeadline(t)
+	} else if write {
+		p.conn.SetWriteDeadline(t)
+	}
+}
+
+// Connects the socket, creating a new socket object if necessary.
+func (p *TSocket) Open() error {
+	if p.IsOpen() {
+		return NewTTransportException(ALREADY_OPEN, "Socket already connected.")
+	}
+	if p.addr == nil {
+		return NewTTransportException(NOT_OPEN, "Cannot open nil address.")
+	}
+	if len(p.addr.Network()) == 0 {
+		return NewTTransportException(NOT_OPEN, "Cannot open bad network name.")
+	}
+	if len(p.addr.String()) == 0 {
+		return NewTTransportException(NOT_OPEN, "Cannot open bad address.")
+	}
+	var err error
+	if p.conn, err = net.DialTimeout(p.addr.Network(), p.addr.String(), p.timeout); err != nil {
+		return NewTTransportException(NOT_OPEN, err.Error())
+	}
+	return nil
+}
+
+// Retrieve the underlying net.Conn
+func (p *TSocket) Conn() net.Conn {
+	return p.conn
+}
+
+// Returns true if the connection is open
+func (p *TSocket) IsOpen() bool {
+	if p.conn == nil {
+		return false
+	}
+	return true
+}
+
+// Closes the socket.
+func (p *TSocket) Close() error {
+	// Close the socket
+	if p.conn != nil {
+		err := p.conn.Close()
+		if err != nil {
+			return err
+		}
+		p.conn = nil
+	}
+	return nil
+}
+
+//Returns the remote address of the socket.
+func (p *TSocket) Addr() net.Addr {
+	return p.addr
+}
+
+func (p *TSocket) Read(buf []byte) (int, error) {
+	if !p.IsOpen() {
+		return 0, NewTTransportException(NOT_OPEN, "Connection not open")
+	}
+	p.pushDeadline(true, false)
+	n, err := p.conn.Read(buf)
+	return n, NewTTransportExceptionFromError(err)
+}
+
+func (p *TSocket) Write(buf []byte) (int, error) {
+	if !p.IsOpen() {
+		return 0, NewTTransportException(NOT_OPEN, "Connection not open")
+	}
+	p.pushDeadline(false, true)
+	return p.conn.Write(buf)
+}
+
+func (p *TSocket) Flush(ctx context.Context) error {
+	return nil
+}
+
+func (p *TSocket) Interrupt() error {
+	if !p.IsOpen() {
+		return nil
+	}
+	return p.conn.Close()
+}
+
+func (p *TSocket) RemainingBytes() (num_bytes uint64) {
+	const maxSize = ^uint64(0)
+	return maxSize // the thruth is, we just don't know unless framed is used
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/ssl_server_socket.go

@@ -0,0 +1,112 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"crypto/tls"
+	"net"
+	"time"
+)
+
+type TSSLServerSocket struct {
+	listener      net.Listener
+	addr          net.Addr
+	clientTimeout time.Duration
+	interrupted   bool
+	cfg           *tls.Config
+}
+
+func NewTSSLServerSocket(listenAddr string, cfg *tls.Config) (*TSSLServerSocket, error) {
+	return NewTSSLServerSocketTimeout(listenAddr, cfg, 0)
+}
+
+func NewTSSLServerSocketTimeout(listenAddr string, cfg *tls.Config, clientTimeout time.Duration) (*TSSLServerSocket, error) {
+	if cfg.MinVersion == 0 {
+		cfg.MinVersion = tls.VersionTLS10
+	}
+	addr, err := net.ResolveTCPAddr("tcp", listenAddr)
+	if err != nil {
+		return nil, err
+	}
+	return &TSSLServerSocket{addr: addr, clientTimeout: clientTimeout, cfg: cfg}, nil
+}
+
+func (p *TSSLServerSocket) Listen() error {
+	if p.IsListening() {
+		return nil
+	}
+	l, err := tls.Listen(p.addr.Network(), p.addr.String(), p.cfg)
+	if err != nil {
+		return err
+	}
+	p.listener = l
+	return nil
+}
+
+func (p *TSSLServerSocket) Accept() (TTransport, error) {
+	if p.interrupted {
+		return nil, errTransportInterrupted
+	}
+	if p.listener == nil {
+		return nil, NewTTransportException(NOT_OPEN, "No underlying server socket")
+	}
+	conn, err := p.listener.Accept()
+	if err != nil {
+		return nil, NewTTransportExceptionFromError(err)
+	}
+	return NewTSSLSocketFromConnTimeout(conn, p.cfg, p.clientTimeout), nil
+}
+
+// Checks whether the socket is listening.
+func (p *TSSLServerSocket) IsListening() bool {
+	return p.listener != nil
+}
+
+// Connects the socket, creating a new socket object if necessary.
+func (p *TSSLServerSocket) Open() error {
+	if p.IsListening() {
+		return NewTTransportException(ALREADY_OPEN, "Server socket already open")
+	}
+	if l, err := tls.Listen(p.addr.Network(), p.addr.String(), p.cfg); err != nil {
+		return err
+	} else {
+		p.listener = l
+	}
+	return nil
+}
+
+func (p *TSSLServerSocket) Addr() net.Addr {
+	return p.addr
+}
+
+func (p *TSSLServerSocket) Close() error {
+	defer func() {
+		p.listener = nil
+	}()
+	if p.IsListening() {
+		return p.listener.Close()
+	}
+	return nil
+}
+
+func (p *TSSLServerSocket) Interrupt() error {
+	p.interrupted = true
+	return nil
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/ssl_socket.go

@@ -0,0 +1,176 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+	"time"
+)
+
+type TSSLSocket struct {
+	conn net.Conn
+	// hostPort contains host:port (e.g. "asdf.com:12345"). The field is
+	// only valid if addr is nil.
+	hostPort string
+	// addr is nil when hostPort is not "", and is only used when the
+	// TSSLSocket is constructed from a net.Addr.
+	addr    net.Addr
+	timeout time.Duration
+	cfg     *tls.Config
+}
+
+// NewTSSLSocket creates a net.Conn-backed TTransport, given a host and port and tls Configuration
+//
+// Example:
+// 	trans, err := thrift.NewTSSLSocket("localhost:9090", nil)
+func NewTSSLSocket(hostPort string, cfg *tls.Config) (*TSSLSocket, error) {
+	return NewTSSLSocketTimeout(hostPort, cfg, 0)
+}
+
+// NewTSSLSocketTimeout creates a net.Conn-backed TTransport, given a host and port
+// it also accepts a tls Configuration and a timeout as a time.Duration
+func NewTSSLSocketTimeout(hostPort string, cfg *tls.Config, timeout time.Duration) (*TSSLSocket, error) {
+	if cfg.MinVersion == 0 {
+		cfg.MinVersion = tls.VersionTLS10
+	}
+	return &TSSLSocket{hostPort: hostPort, timeout: timeout, cfg: cfg}, nil
+}
+
+// Creates a TSSLSocket from a net.Addr
+func NewTSSLSocketFromAddrTimeout(addr net.Addr, cfg *tls.Config, timeout time.Duration) *TSSLSocket {
+	return &TSSLSocket{addr: addr, timeout: timeout, cfg: cfg}
+}
+
+// Creates a TSSLSocket from an existing net.Conn
+func NewTSSLSocketFromConnTimeout(conn net.Conn, cfg *tls.Config, timeout time.Duration) *TSSLSocket {
+	return &TSSLSocket{conn: conn, addr: conn.RemoteAddr(), timeout: timeout, cfg: cfg}
+}
+
+// Sets the socket timeout
+func (p *TSSLSocket) SetTimeout(timeout time.Duration) error {
+	p.timeout = timeout
+	return nil
+}
+
+func (p *TSSLSocket) pushDeadline(read, write bool) {
+	var t time.Time
+	if p.timeout > 0 {
+		t = time.Now().Add(time.Duration(p.timeout))
+	}
+	if read && write {
+		p.conn.SetDeadline(t)
+	} else if read {
+		p.conn.SetReadDeadline(t)
+	} else if write {
+		p.conn.SetWriteDeadline(t)
+	}
+}
+
+// Connects the socket, creating a new socket object if necessary.
+func (p *TSSLSocket) Open() error {
+	var err error
+	// If we have a hostname, we need to pass the hostname to tls.Dial for
+	// certificate hostname checks.
+	if p.hostPort != "" {
+		if p.conn, err = tls.DialWithDialer(&net.Dialer{
+			Timeout: p.timeout}, "tcp", p.hostPort, p.cfg); err != nil {
+			return NewTTransportException(NOT_OPEN, err.Error())
+		}
+	} else {
+		if p.IsOpen() {
+			return NewTTransportException(ALREADY_OPEN, "Socket already connected.")
+		}
+		if p.addr == nil {
+			return NewTTransportException(NOT_OPEN, "Cannot open nil address.")
+		}
+		if len(p.addr.Network()) == 0 {
+			return NewTTransportException(NOT_OPEN, "Cannot open bad network name.")
+		}
+		if len(p.addr.String()) == 0 {
+			return NewTTransportException(NOT_OPEN, "Cannot open bad address.")
+		}
+		if p.conn, err = tls.DialWithDialer(&net.Dialer{
+			Timeout: p.timeout}, p.addr.Network(), p.addr.String(), p.cfg); err != nil {
+			return NewTTransportException(NOT_OPEN, err.Error())
+		}
+	}
+	return nil
+}
+
+// Retrieve the underlying net.Conn
+func (p *TSSLSocket) Conn() net.Conn {
+	return p.conn
+}
+
+// Returns true if the connection is open
+func (p *TSSLSocket) IsOpen() bool {
+	if p.conn == nil {
+		return false
+	}
+	return true
+}
+
+// Closes the socket.
+func (p *TSSLSocket) Close() error {
+	// Close the socket
+	if p.conn != nil {
+		err := p.conn.Close()
+		if err != nil {
+			return err
+		}
+		p.conn = nil
+	}
+	return nil
+}
+
+func (p *TSSLSocket) Read(buf []byte) (int, error) {
+	if !p.IsOpen() {
+		return 0, NewTTransportException(NOT_OPEN, "Connection not open")
+	}
+	p.pushDeadline(true, false)
+	n, err := p.conn.Read(buf)
+	return n, NewTTransportExceptionFromError(err)
+}
+
+func (p *TSSLSocket) Write(buf []byte) (int, error) {
+	if !p.IsOpen() {
+		return 0, NewTTransportException(NOT_OPEN, "Connection not open")
+	}
+	p.pushDeadline(false, true)
+	return p.conn.Write(buf)
+}
+
+func (p *TSSLSocket) Flush(ctx context.Context) error {
+	return nil
+}
+
+func (p *TSSLSocket) Interrupt() error {
+	if !p.IsOpen() {
+		return nil
+	}
+	return p.conn.Close()
+}
+
+func (p *TSSLSocket) RemainingBytes() (num_bytes uint64) {
+	const maxSize = ^uint64(0)
+	return maxSize // the thruth is, we just don't know unless framed is used
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/transport.go

@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"errors"
+	"io"
+)
+
+var errTransportInterrupted = errors.New("Transport Interrupted")
+
+type Flusher interface {
+	Flush() (err error)
+}
+
+type ContextFlusher interface {
+	Flush(ctx context.Context) (err error)
+}
+
+type ReadSizeProvider interface {
+	RemainingBytes() (num_bytes uint64)
+}
+
+// Encapsulates the I/O layer
+type TTransport interface {
+	io.ReadWriteCloser
+	ContextFlusher
+	ReadSizeProvider
+
+	// Opens the transport for communication
+	Open() error
+
+	// Returns true if the transport is open
+	IsOpen() bool
+}
+
+type stringWriter interface {
+	WriteString(s string) (n int, err error)
+}
+
+// This is "enchanced" transport with extra capabilities. You need to use one of these
+// to construct protocol.
+// Notably, TSocket does not implement this interface, and it is always a mistake to use
+// TSocket directly in protocol.
+type TRichTransport interface {
+	io.ReadWriter
+	io.ByteReader
+	io.ByteWriter
+	stringWriter
+	ContextFlusher
+	ReadSizeProvider
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/transport_exception.go

@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+	"io"
+)
+
+type timeoutable interface {
+	Timeout() bool
+}
+
+// Thrift Transport exception
+type TTransportException interface {
+	TException
+	TypeId() int
+	Err() error
+}
+
+const (
+	UNKNOWN_TRANSPORT_EXCEPTION = 0
+	NOT_OPEN                    = 1
+	ALREADY_OPEN                = 2
+	TIMED_OUT                   = 3
+	END_OF_FILE                 = 4
+)
+
+type tTransportException struct {
+	typeId int
+	err    error
+}
+
+func (p *tTransportException) TypeId() int {
+	return p.typeId
+}
+
+func (p *tTransportException) Error() string {
+	return p.err.Error()
+}
+
+func (p *tTransportException) Err() error {
+	return p.err
+}
+
+func NewTTransportException(t int, e string) TTransportException {
+	return &tTransportException{typeId: t, err: errors.New(e)}
+}
+
+func NewTTransportExceptionFromError(e error) TTransportException {
+	if e == nil {
+		return nil
+	}
+
+	if t, ok := e.(TTransportException); ok {
+		return t
+	}
+
+	switch v := e.(type) {
+	case TTransportException:
+		return v
+	case timeoutable:
+		if v.Timeout() {
+			return &tTransportException{typeId: TIMED_OUT, err: e}
+		}
+	}
+
+	if e == io.EOF {
+		return &tTransportException{typeId: END_OF_FILE, err: e}
+	}
+
+	return &tTransportException{typeId: UNKNOWN_TRANSPORT_EXCEPTION, err: e}
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/transport_factory.go

@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Factory class used to create wrapped instance of Transports.
+// This is used primarily in servers, which get Transports from
+// a ServerTransport and then may want to mutate them (i.e. create
+// a BufferedTransport from the underlying base transport)
+type TTransportFactory interface {
+	GetTransport(trans TTransport) (TTransport, error)
+}
+
+type tTransportFactory struct{}
+
+// Return a wrapped instance of the base Transport.
+func (p *tTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	return trans, nil
+}
+
+func NewTTransportFactory() TTransportFactory {
+	return &tTransportFactory{}
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/type.go

@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Type constants in the Thrift protocol
+type TType byte
+
+const (
+	STOP   = 0
+	VOID   = 1
+	BOOL   = 2
+	BYTE   = 3
+	I08    = 3
+	DOUBLE = 4
+	I16    = 6
+	I32    = 8
+	I64    = 10
+	STRING = 11
+	UTF7   = 11
+	STRUCT = 12
+	MAP    = 13
+	SET    = 14
+	LIST   = 15
+	UTF8   = 16
+	UTF16  = 17
+	//BINARY = 18   wrong and unusued
+)
+
+var typeNames = map[int]string{
+	STOP:   "STOP",
+	VOID:   "VOID",
+	BOOL:   "BOOL",
+	BYTE:   "BYTE",
+	DOUBLE: "DOUBLE",
+	I16:    "I16",
+	I32:    "I32",
+	I64:    "I64",
+	STRING: "STRING",
+	STRUCT: "STRUCT",
+	MAP:    "MAP",
+	SET:    "SET",
+	LIST:   "LIST",
+	UTF8:   "UTF8",
+	UTF16:  "UTF16",
+}
+
+func (p TType) String() string {
+	if s, ok := typeNames[int(p)]; ok {
+		return s
+	}
+	return "Unknown"
+}

vendor/git.apache.org/thrift.git/lib/go/thrift/zlib_transport.go

@@ -0,0 +1,132 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements. See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership. The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License. You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied. See the License for the
+* specific language governing permissions and limitations
+* under the License.
+ */
+
+package thrift
+
+import (
+	"compress/zlib"
+	"context"
+	"io"
+	"log"
+)
+
+// TZlibTransportFactory is a factory for TZlibTransport instances
+type TZlibTransportFactory struct {
+	level   int
+	factory TTransportFactory
+}
+
+// TZlibTransport is a TTransport implementation that makes use of zlib compression.
+type TZlibTransport struct {
+	reader    io.ReadCloser
+	transport TTransport
+	writer    *zlib.Writer
+}
+
+// GetTransport constructs a new instance of NewTZlibTransport
+func (p *TZlibTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	if p.factory != nil {
+		// wrap other factory
+		var err error
+		trans, err = p.factory.GetTransport(trans)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return NewTZlibTransport(trans, p.level)
+}
+
+// NewTZlibTransportFactory constructs a new instance of NewTZlibTransportFactory
+func NewTZlibTransportFactory(level int) *TZlibTransportFactory {
+	return &TZlibTransportFactory{level: level, factory: nil}
+}
+
+// NewTZlibTransportFactory constructs a new instance of TZlibTransportFactory
+// as a wrapper over existing transport factory
+func NewTZlibTransportFactoryWithFactory(level int, factory TTransportFactory) *TZlibTransportFactory {
+	return &TZlibTransportFactory{level: level, factory: factory}
+}
+
+// NewTZlibTransport constructs a new instance of TZlibTransport
+func NewTZlibTransport(trans TTransport, level int) (*TZlibTransport, error) {
+	w, err := zlib.NewWriterLevel(trans, level)
+	if err != nil {
+		log.Println(err)
+		return nil, err
+	}
+
+	return &TZlibTransport{
+		writer:    w,
+		transport: trans,
+	}, nil
+}
+
+// Close closes the reader and writer (flushing any unwritten data) and closes
+// the underlying transport.
+func (z *TZlibTransport) Close() error {
+	if z.reader != nil {
+		if err := z.reader.Close(); err != nil {
+			return err
+		}
+	}
+	if err := z.writer.Close(); err != nil {
+		return err
+	}
+	return z.transport.Close()
+}
+
+// Flush flushes the writer and its underlying transport.
+func (z *TZlibTransport) Flush(ctx context.Context) error {
+	if err := z.writer.Flush(); err != nil {
+		return err
+	}
+	return z.transport.Flush(ctx)
+}
+
+// IsOpen returns true if the transport is open
+func (z *TZlibTransport) IsOpen() bool {
+	return z.transport.IsOpen()
+}
+
+// Open opens the transport for communication
+func (z *TZlibTransport) Open() error {
+	return z.transport.Open()
+}
+
+func (z *TZlibTransport) Read(p []byte) (int, error) {
+	if z.reader == nil {
+		r, err := zlib.NewReader(z.transport)
+		if err != nil {
+			return 0, NewTTransportExceptionFromError(err)
+		}
+		z.reader = r
+	}
+
+	return z.reader.Read(p)
+}
+
+// RemainingBytes returns the size in bytes of the data that is still to be
+// read.
+func (z *TZlibTransport) RemainingBytes() uint64 {
+	return z.transport.RemainingBytes()
+}
+
+func (z *TZlibTransport) Write(p []byte) (int, error) {
+	return z.writer.Write(p)
+}

vendor/github.com/minio/parquet-go/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/minio/parquet-go/Makefile

@@ -0,0 +1,36 @@
+GOPATH := $(shell go env GOPATH)
+
+all: check
+
+getdeps:
+	@if [ ! -f ${GOPATH}/bin/golint ]; then echo "Installing golint" && go get -u golang.org/x/lint/golint; fi
+	@if [ ! -f ${GOPATH}/bin/gocyclo ]; then echo "Installing gocyclo" && go get -u github.com/fzipp/gocyclo; fi
+	@if [ ! -f ${GOPATH}/bin/misspell ]; then echo "Installing misspell" && go get -u github.com/client9/misspell/cmd/misspell; fi
+	@if [ ! -f ${GOPATH}/bin/ineffassign ]; then echo "Installing ineffassign" && go get -u github.com/gordonklaus/ineffassign; fi
+
+vet:
+	@echo "Running $@"
+	@go tool vet -atomic -bool -copylocks -nilfunc -printf -shadow -rangeloops -unreachable -unsafeptr -unusedresult *.go
+
+fmt:
+	@echo "Running $@"
+	@gofmt -d *.go
+
+lint:
+	@echo "Running $@"
+	@${GOPATH}/bin/golint -set_exit_status
+
+cyclo:
+	@echo "Running $@"
+	@${GOPATH}/bin/gocyclo -over 200 .
+
+spelling:
+	@${GOPATH}/bin/misspell -locale US -error *.go README.md
+
+ineffassign:
+	@echo "Running $@"
+	@${GOPATH}/bin/ineffassign .
+
+check: getdeps vet fmt lint cyclo spelling ineffassign
+	@echo "Running unit tests"
+	@go test -tags kqueue .

vendor/github.com/minio/parquet-go/README.md

@@ -0,0 +1 @@
+# parquet-go

vendor/github.com/minio/parquet-go/column.go

@@ -0,0 +1,152 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+import (
+	"io"
+	"strings"
+
+	"git.apache.org/thrift.git/lib/go/thrift"
+	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/parquet-go/gen-go/parquet"
+)
+
+func getColumns(
+	rowGroup *parquet.RowGroup,
+	columnNames set.StringSet,
+	schemaElements []*parquet.SchemaElement,
+	getReaderFunc GetReaderFunc,
+) (nameColumnMap map[string]*column, err error) {
+	nameIndexMap := make(map[string]int)
+	for colIndex, columnChunk := range rowGroup.GetColumns() {
+		meta := columnChunk.GetMetaData()
+		columnName := strings.Join(meta.GetPathInSchema(), ".")
+		if columnNames != nil && !columnNames.Contains(columnName) {
+			continue
+		}
+
+		// Ignore column spanning into another file.
+		if columnChunk.GetFilePath() != "" {
+			continue
+		}
+
+		offset := meta.GetDataPageOffset()
+		if meta.DictionaryPageOffset != nil {
+			offset = meta.GetDictionaryPageOffset()
+		}
+
+		size := meta.GetTotalCompressedSize()
+
+		rc, err := getReaderFunc(offset, size)
+		if err != nil {
+			return nil, err
+		}
+
+		thriftReader := thrift.NewTBufferedTransport(thrift.NewStreamTransportR(rc), int(size))
+
+		if nameColumnMap == nil {
+			nameColumnMap = make(map[string]*column)
+		}
+
+		nameColumnMap[columnName] = &column{
+			name:           columnName,
+			metadata:       meta,
+			schemaElements: schemaElements,
+			rc:             rc,
+			thriftReader:   thriftReader,
+			valueType:      meta.GetType(),
+		}
+
+		nameIndexMap[columnName] = colIndex
+	}
+
+	for name := range nameColumnMap {
+		nameColumnMap[name].nameIndexMap = nameIndexMap
+	}
+
+	return nameColumnMap, nil
+}
+
+type column struct {
+	name           string
+	endOfValues    bool
+	valueIndex     int
+	valueType      parquet.Type
+	metadata       *parquet.ColumnMetaData
+	schemaElements []*parquet.SchemaElement
+	nameIndexMap   map[string]int
+	dictPage       *page
+	dataTable      *table
+	rc             io.ReadCloser
+	thriftReader   *thrift.TBufferedTransport
+}
+
+func (column *column) close() (err error) {
+	if column.rc != nil {
+		err = column.rc.Close()
+		column.rc = nil
+	}
+
+	return err
+}
+
+func (column *column) readPage() {
+	page, _, _, err := readPage(
+		column.thriftReader,
+		column.metadata,
+		column.nameIndexMap,
+		column.schemaElements,
+	)
+
+	if err != nil {
+		column.endOfValues = true
+		return
+	}
+
+	if page.Header.GetType() == parquet.PageType_DICTIONARY_PAGE {
+		column.dictPage = page
+		column.readPage()
+		return
+	}
+
+	page.decode(column.dictPage)
+
+	if column.dataTable == nil {
+		column.dataTable = newTableFromTable(page.DataTable)
+	}
+
+	column.dataTable.Merge(page.DataTable)
+}
+
+func (column *column) read() (value interface{}, valueType parquet.Type) {
+	if column.dataTable == nil {
+		column.readPage()
+		column.valueIndex = 0
+	}
+
+	if column.endOfValues {
+		return nil, column.metadata.GetType()
+	}
+
+	value = column.dataTable.Values[column.valueIndex]
+	column.valueIndex++
+	if len(column.dataTable.Values) == column.valueIndex {
+		column.dataTable = nil
+	}
+
+	return value, column.metadata.GetType()
+}

vendor/github.com/minio/parquet-go/compression.go

@@ -0,0 +1,57 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io/ioutil"
+
+	"github.com/golang/snappy"
+	"github.com/minio/parquet-go/gen-go/parquet"
+	"github.com/pierrec/lz4"
+	lzo "github.com/rasky/go-lzo"
+)
+
+type compressionCodec parquet.CompressionCodec
+
+func (c compressionCodec) uncompress(buf []byte) ([]byte, error) {
+	switch parquet.CompressionCodec(c) {
+	case parquet.CompressionCodec_UNCOMPRESSED:
+		return buf, nil
+
+	case parquet.CompressionCodec_SNAPPY:
+		return snappy.Decode(nil, buf)
+
+	case parquet.CompressionCodec_GZIP:
+		reader, err := gzip.NewReader(bytes.NewReader(buf))
+		if err != nil {
+			return nil, err
+		}
+		defer reader.Close()
+		return ioutil.ReadAll(reader)
+
+	case parquet.CompressionCodec_LZO:
+		return lzo.Decompress1X(bytes.NewReader(buf), len(buf), 0)
+
+	case parquet.CompressionCodec_LZ4:
+		return ioutil.ReadAll(lz4.NewReader(bytes.NewReader(buf)))
+	}
+
+	return nil, fmt.Errorf("invalid compression codec %v", c)
+}

vendor/github.com/minio/parquet-go/decode.go

@@ -0,0 +1,506 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"math"
+
+	"github.com/minio/parquet-go/gen-go/parquet"
+)
+
+func uint32ToBytes(v uint32) []byte {
+	buf := make([]byte, 4)
+	binary.LittleEndian.PutUint32(buf, v)
+	return buf
+}
+
+func uint64ToBytes(v uint64) []byte {
+	buf := make([]byte, 8)
+	binary.LittleEndian.PutUint64(buf, v)
+	return buf
+}
+
+func bytesToUint32(buf []byte) uint32 {
+	return binary.LittleEndian.Uint32(buf)
+}
+
+func bytesToUint64(buf []byte) uint64 {
+	return binary.LittleEndian.Uint64(buf)
+}
+
+func i64sToi32s(i64s []int64) (i32s []int32) {
+	i32s = make([]int32, len(i64s))
+	for i := range i64s {
+		i32s[i] = int32(i64s[i])
+	}
+
+	return i32s
+}
+
+func readBitPacked(reader *bytes.Reader, header, bitWidth uint64) (result []int64, err error) {
+	count := header * 8
+
+	if count == 0 {
+		return result, nil
+	}
+
+	if bitWidth == 0 {
+		return make([]int64, count), nil
+	}
+
+	data := make([]byte, header*bitWidth)
+	if _, err = reader.Read(data); err != nil {
+		return nil, err
+	}
+
+	var val, used, left, b uint64
+
+	valNeedBits := bitWidth
+	i := -1
+	for {
+		if left <= 0 {
+			i++
+			if i >= len(data) {
+				break
+			}
+
+			b = uint64(data[i])
+			left = 8
+			used = 0
+		}
+
+		if left >= valNeedBits {
+			val |= ((b >> used) & ((1 << valNeedBits) - 1)) << (bitWidth - valNeedBits)
+			result = append(result, int64(val))
+			val = 0
+			left -= valNeedBits
+			used += valNeedBits
+			valNeedBits = bitWidth
+		} else {
+			val |= (b >> used) << (bitWidth - valNeedBits)
+			valNeedBits -= left
+			left = 0
+		}
+	}
+
+	return result, nil
+}
+
+func readBools(reader *bytes.Reader, count uint64) (result []bool, err error) {
+	i64s, err := readBitPacked(reader, count, 1)
+	if err != nil {
+		return nil, err
+	}
+
+	var i uint64
+	for i = 0; i < count; i++ {
+		result = append(result, i64s[i] > 0)
+	}
+
+	return result, nil
+}
+
+func readInt32s(reader *bytes.Reader, count uint64) (result []int32, err error) {
+	buf := make([]byte, 4)
+
+	var i uint64
+	for i = 0; i < count; i++ {
+		if _, err = reader.Read(buf); err != nil {
+			return nil, err
+		}
+
+		result = append(result, int32(bytesToUint32(buf)))
+	}
+
+	return result, nil
+}
+
+func readInt64s(reader *bytes.Reader, count uint64) (result []int64, err error) {
+	buf := make([]byte, 8)
+
+	var i uint64
+	for i = 0; i < count; i++ {
+		if _, err = reader.Read(buf); err != nil {
+			return nil, err
+		}
+
+		result = append(result, int64(bytesToUint64(buf)))
+	}
+
+	return result, nil
+}
+
+func readInt96s(reader *bytes.Reader, count uint64) (result [][]byte, err error) {
+	var i uint64
+	for i = 0; i < count; i++ {
+		buf := make([]byte, 12)
+
+		if _, err = reader.Read(buf); err != nil {
+			return nil, err
+		}
+
+		result = append(result, buf)
+	}
+
+	return result, nil
+}
+
+func readFloats(reader *bytes.Reader, count uint64) (result []float32, err error) {
+	buf := make([]byte, 4)
+
+	var i uint64
+	for i = 0; i < count; i++ {
+		if _, err = reader.Read(buf); err != nil {
+			return nil, err
+		}
+
+		result = append(result, math.Float32frombits(bytesToUint32(buf)))
+	}
+
+	return result, nil
+}
+
+func readDoubles(reader *bytes.Reader, count uint64) (result []float64, err error) {
+	buf := make([]byte, 8)
+
+	var i uint64
+	for i = 0; i < count; i++ {
+		if _, err = reader.Read(buf); err != nil {
+			return nil, err
+		}
+
+		result = append(result, math.Float64frombits(bytesToUint64(buf)))
+	}
+
+	return result, nil
+}
+
+func readByteArrays(reader *bytes.Reader, count uint64) (result [][]byte, err error) {
+	buf := make([]byte, 4)
+
+	var i uint64
+	for i = 0; i < count; i++ {
+		if _, err = reader.Read(buf); err != nil {
+			return nil, err
+		}
+
+		data := make([]byte, bytesToUint32(buf))
+		if _, err = reader.Read(data); err != nil {
+			return nil, err
+		}
+
+		result = append(result, data)
+	}
+
+	return result, nil
+}
+
+func readFixedLenByteArrays(reader *bytes.Reader, count, length uint64) (result [][]byte, err error) {
+	var i uint64
+	for i = 0; i < count; i++ {
+		data := make([]byte, length)
+		if _, err = reader.Read(data); err != nil {
+			return nil, err
+		}
+
+		result = append(result, data)
+	}
+
+	return result, nil
+}
+
+func readValues(reader *bytes.Reader, dataType parquet.Type, count, length uint64) (interface{}, error) {
+	switch dataType {
+	case parquet.Type_BOOLEAN:
+		return readBools(reader, count)
+	case parquet.Type_INT32:
+		return readInt32s(reader, count)
+	case parquet.Type_INT64:
+		return readInt64s(reader, count)
+	case parquet.Type_INT96:
+		return readInt96s(reader, count)
+	case parquet.Type_FLOAT:
+		return readFloats(reader, count)
+	case parquet.Type_DOUBLE:
+		return readDoubles(reader, count)
+	case parquet.Type_BYTE_ARRAY:
+		return readByteArrays(reader, count)
+	case parquet.Type_FIXED_LEN_BYTE_ARRAY:
+		return readFixedLenByteArrays(reader, count, length)
+	}
+
+	return nil, fmt.Errorf("unknown parquet type %v", dataType)
+}
+
+func readUnsignedVarInt(reader *bytes.Reader) (v uint64, err error) {
+	var b byte
+	var shift uint64
+
+	for {
+		if b, err = reader.ReadByte(); err != nil {
+			return 0, err
+		}
+
+		if v |= ((uint64(b) & 0x7F) << shift); b&0x80 == 0 {
+			break
+		}
+
+		shift += 7
+	}
+
+	return v, nil
+}
+
+func readRLE(reader *bytes.Reader, header, bitWidth uint64) (result []int64, err error) {
+	width := (bitWidth + 7) / 8
+	data := make([]byte, width)
+	if width > 0 {
+		if _, err = reader.Read(data); err != nil {
+			return nil, err
+		}
+	}
+
+	if width < 4 {
+		data = append(data, make([]byte, 4-width)...)
+	}
+
+	val := int64(bytesToUint32(data))
+
+	count := header >> 1
+	result = make([]int64, count)
+	for i := range result {
+		result[i] = val
+	}
+
+	return result, nil
+}
+
+func readRLEBitPackedHybrid(reader *bytes.Reader, length, bitWidth uint64) (result []int64, err error) {
+	if length <= 0 {
+		var i32s []int32
+		i32s, err = readInt32s(reader, 1)
+		if err != nil {
+			return nil, err
+		}
+		length = uint64(i32s[0])
+	}
+
+	buf := make([]byte, length)
+	if _, err = reader.Read(buf); err != nil {
+		return nil, err
+	}
+
+	reader = bytes.NewReader(buf)
+	for reader.Len() > 0 {
+		header, err := readUnsignedVarInt(reader)
+		if err != nil {
+			return nil, err
+		}
+
+		var i64s []int64
+		if header&1 == 0 {
+			i64s, err = readRLE(reader, header, bitWidth)
+		} else {
+			i64s, err = readBitPacked(reader, header>>1, bitWidth)
+		}
+
+		if err != nil {
+			return nil, err
+		}
+
+		result = append(result, i64s...)
+	}
+
+	return result, nil
+}
+
+func readDeltaBinaryPackedInt(reader *bytes.Reader) (result []int64, err error) {
+	blockSize, err := readUnsignedVarInt(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	numMiniblocksInBlock, err := readUnsignedVarInt(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	numValues, err := readUnsignedVarInt(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	firstValueZigZag, err := readUnsignedVarInt(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	v := int64(firstValueZigZag>>1) ^ (-int64(firstValueZigZag & 1))
+	result = append(result, v)
+
+	numValuesInMiniBlock := blockSize / numMiniblocksInBlock
+
+	bitWidths := make([]uint64, numMiniblocksInBlock)
+	for uint64(len(result)) < numValues {
+		minDeltaZigZag, err := readUnsignedVarInt(reader)
+		if err != nil {
+			return nil, err
+		}
+
+		for i := 0; uint64(i) < numMiniblocksInBlock; i++ {
+			b, err := reader.ReadByte()
+			if err != nil {
+				return nil, err
+			}
+			bitWidths[i] = uint64(b)
+		}
+
+		minDelta := int64(minDeltaZigZag>>1) ^ (-int64(minDeltaZigZag & 1))
+		for i := 0; uint64(i) < numMiniblocksInBlock; i++ {
+			i64s, err := readBitPacked(reader, numValuesInMiniBlock/8, bitWidths[i])
+			if err != nil {
+				return nil, err
+			}
+
+			for j := range i64s {
+				v += i64s[j] + minDelta
+				result = append(result, v)
+			}
+		}
+	}
+
+	return result[:numValues], nil
+}
+
+func readDeltaLengthByteArrays(reader *bytes.Reader) (result [][]byte, err error) {
+	i64s, err := readDeltaBinaryPackedInt(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	for i := 0; i < len(i64s); i++ {
+		arrays, err := readFixedLenByteArrays(reader, 1, uint64(i64s[i]))
+		if err != nil {
+			return nil, err
+		}
+
+		result = append(result, arrays[0])
+	}
+
+	return result, nil
+}
+
+func readDeltaByteArrays(reader *bytes.Reader) (result [][]byte, err error) {
+	i64s, err := readDeltaBinaryPackedInt(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	suffixes, err := readDeltaLengthByteArrays(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	result = append(result, suffixes[0])
+	for i := 1; i < len(i64s); i++ {
+		prefixLength := i64s[i]
+		val := append([]byte{}, result[i-1][:prefixLength]...)
+		val = append(val, suffixes[i]...)
+		result = append(result, val)
+	}
+
+	return result, nil
+}
+
+func readDataPageValues(
+	bytesReader *bytes.Reader,
+	encoding parquet.Encoding,
+	dataType parquet.Type,
+	convertedType parquet.ConvertedType,
+	count, bitWidth uint64,
+) (result interface{}, resultDataType parquet.Type, err error) {
+	switch encoding {
+	case parquet.Encoding_PLAIN:
+		result, err = readValues(bytesReader, dataType, count, bitWidth)
+		return result, dataType, err
+
+	case parquet.Encoding_PLAIN_DICTIONARY:
+		b, err := bytesReader.ReadByte()
+		if err != nil {
+			return nil, -1, err
+		}
+
+		i64s, err := readRLEBitPackedHybrid(bytesReader, uint64(bytesReader.Len()), uint64(b))
+		if err != nil {
+			return nil, -1, err
+		}
+
+		return i64s[:count], parquet.Type_INT64, nil
+
+	case parquet.Encoding_RLE:
+		i64s, err := readRLEBitPackedHybrid(bytesReader, 0, bitWidth)
+		if err != nil {
+			return nil, -1, err
+		}
+
+		i64s = i64s[:count]
+
+		if dataType == parquet.Type_INT32 {
+			return i64sToi32s(i64s), parquet.Type_INT32, nil
+		}
+
+		return i64s, parquet.Type_INT64, nil
+
+	case parquet.Encoding_BIT_PACKED:
+		return nil, -1, fmt.Errorf("deprecated parquet encoding %v", parquet.Encoding_BIT_PACKED)
+
+	case parquet.Encoding_DELTA_BINARY_PACKED:
+		i64s, err := readDeltaBinaryPackedInt(bytesReader)
+		if err != nil {
+			return nil, -1, err
+		}
+
+		i64s = i64s[:count]
+
+		if dataType == parquet.Type_INT32 {
+			return i64sToi32s(i64s), parquet.Type_INT32, nil
+		}
+
+		return i64s, parquet.Type_INT64, nil
+
+	case parquet.Encoding_DELTA_LENGTH_BYTE_ARRAY:
+		byteSlices, err := readDeltaLengthByteArrays(bytesReader)
+		if err != nil {
+			return nil, -1, err
+		}
+
+		return byteSlices[:count], parquet.Type_FIXED_LEN_BYTE_ARRAY, nil
+
+	case parquet.Encoding_DELTA_BYTE_ARRAY:
+		byteSlices, err := readDeltaByteArrays(bytesReader)
+		if err != nil {
+			return nil, -1, err
+		}
+
+		return byteSlices[:count], parquet.Type_FIXED_LEN_BYTE_ARRAY, nil
+	}
+
+	return nil, -1, fmt.Errorf("unsupported parquet encoding %v", encoding)
+}

vendor/github.com/minio/parquet-go/gen-go/parquet/GoUnusedProtection__.go

@@ -0,0 +1,7 @@
+// Autogenerated by Thrift Compiler (0.10.0)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package parquet
+
+var GoUnusedProtection__ int;
+

vendor/github.com/minio/parquet-go/gen-go/parquet/parquet-consts.go

@@ -0,0 +1,20 @@
+// Autogenerated by Thrift Compiler (0.10.0)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package parquet
+
+import (
+	"bytes"
+	"fmt"
+	"git.apache.org/thrift.git/lib/go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+
+func init() {
+}
+

vendor/github.com/minio/parquet-go/gen-parquet-format-pkg.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+#
+# Minio Cloud Storage, (C) 2018 Minio, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+set -e
+
+rm -f parquet.thrift
+wget -q https://github.com/apache/parquet-format/raw/df6132b94f273521a418a74442085fdd5a0aa009/src/main/thrift/parquet.thrift
+thrift --gen go parquet.thrift

vendor/github.com/minio/parquet-go/page.go

@@ -0,0 +1,531 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+
+	"git.apache.org/thrift.git/lib/go/thrift"
+	"github.com/minio/parquet-go/gen-go/parquet"
+)
+
+// getBitWidth - returns bits required to place num e.g.
+//
+//    num | width
+//   -----|-------
+//     0  |   0
+//     1  |   1
+//     2  |   2
+//     3  |   2
+//     4  |   3
+//     5  |   3
+//    ... |  ...
+//    ... |  ...
+//
+func getBitWidth(num uint64) (width uint64) {
+	for ; num != 0; num >>= 1 {
+		width++
+	}
+
+	return width
+}
+
+// getMaxDefLevel - get maximum definition level.
+func getMaxDefLevel(nameIndexMap map[string]int, schemaElements []*parquet.SchemaElement, path []string) (v int) {
+	for i := 1; i <= len(path); i++ {
+		name := strings.Join(path[:i], ".")
+		if index, ok := nameIndexMap[name]; ok {
+			if schemaElements[index].GetRepetitionType() != parquet.FieldRepetitionType_REQUIRED {
+				v++
+			}
+		}
+	}
+
+	return v
+}
+
+// getMaxRepLevel - get maximum repetition level.
+func getMaxRepLevel(nameIndexMap map[string]int, schemaElements []*parquet.SchemaElement, path []string) (v int) {
+	for i := 1; i <= len(path); i++ {
+		name := strings.Join(path[:i], ".")
+		if index, ok := nameIndexMap[name]; ok {
+			if schemaElements[index].GetRepetitionType() == parquet.FieldRepetitionType_REPEATED {
+				v++
+			}
+		}
+	}
+
+	return v
+}
+
+func readPageHeader(reader *thrift.TBufferedTransport) (*parquet.PageHeader, error) {
+	pageHeader := parquet.NewPageHeader()
+	if err := pageHeader.Read(thrift.NewTCompactProtocol(reader)); err != nil {
+		return nil, err
+	}
+
+	return pageHeader, nil
+}
+
+func readPageRawData(thriftReader *thrift.TBufferedTransport, metadata *parquet.ColumnMetaData) (page *page, err error) {
+	pageHeader, err := readPageHeader(thriftReader)
+	if err != nil {
+		return nil, err
+	}
+
+	switch pageType := pageHeader.GetType(); pageType {
+	case parquet.PageType_DICTIONARY_PAGE:
+		page = newDictPage()
+	case parquet.PageType_DATA_PAGE, parquet.PageType_DATA_PAGE_V2:
+		page = newDataPage()
+	default:
+		return nil, fmt.Errorf("unsupported page type %v", pageType)
+	}
+
+	compressedPageSize := pageHeader.GetCompressedPageSize()
+	buf := make([]byte, compressedPageSize)
+	if _, err := thriftReader.Read(buf); err != nil {
+		return nil, err
+	}
+
+	page.Header = pageHeader
+	page.CompressType = metadata.GetCodec()
+	page.RawData = buf
+	page.Path = append([]string{}, metadata.GetPathInSchema()...)
+	page.DataType = metadata.GetType()
+
+	return page, nil
+}
+
+func readPage(
+	thriftReader *thrift.TBufferedTransport,
+	metadata *parquet.ColumnMetaData,
+	columnNameIndexMap map[string]int,
+	schemaElements []*parquet.SchemaElement,
+) (page *page, definitionLevels, numRows int64, err error) {
+
+	pageHeader, err := readPageHeader(thriftReader)
+	if err != nil {
+		return nil, 0, 0, err
+	}
+
+	read := func() (data []byte, err error) {
+		var repLevelsLen, defLevelsLen int32
+		var repLevelsBuf, defLevelsBuf []byte
+
+		if pageHeader.GetType() == parquet.PageType_DATA_PAGE_V2 {
+			repLevelsLen = pageHeader.DataPageHeaderV2.GetRepetitionLevelsByteLength()
+			repLevelsBuf = make([]byte, repLevelsLen)
+			if _, err = thriftReader.Read(repLevelsBuf); err != nil {
+				return nil, err
+			}
+
+			defLevelsLen = pageHeader.DataPageHeaderV2.GetDefinitionLevelsByteLength()
+			defLevelsBuf = make([]byte, defLevelsLen)
+			if _, err = thriftReader.Read(defLevelsBuf); err != nil {
+				return nil, err
+			}
+		}
+
+		dataBuf := make([]byte, pageHeader.GetCompressedPageSize()-repLevelsLen-defLevelsLen)
+		if _, err = thriftReader.Read(dataBuf); err != nil {
+			return nil, err
+		}
+
+		if dataBuf, err = compressionCodec(metadata.GetCodec()).uncompress(dataBuf); err != nil {
+			return nil, err
+		}
+
+		if repLevelsLen == 0 && defLevelsLen == 0 {
+			return dataBuf, nil
+		}
+
+		if repLevelsLen > 0 {
+			data = append(data, uint32ToBytes(uint32(repLevelsLen))...)
+			data = append(data, repLevelsBuf...)
+		}
+
+		if defLevelsLen > 0 {
+			data = append(data, uint32ToBytes(uint32(defLevelsLen))...)
+			data = append(data, defLevelsBuf...)
+		}
+
+		data = append(data, dataBuf...)
+
+		return data, nil
+	}
+
+	buf, err := read()
+	if err != nil {
+		return nil, 0, 0, err
+	}
+
+	path := append([]string{}, metadata.GetPathInSchema()...)
+
+	bytesReader := bytes.NewReader(buf)
+	pageType := pageHeader.GetType()
+	switch pageType {
+	case parquet.PageType_INDEX_PAGE:
+		return nil, 0, 0, fmt.Errorf("page type %v is not supported", parquet.PageType_INDEX_PAGE)
+
+	case parquet.PageType_DICTIONARY_PAGE:
+		page = newDictPage()
+		page.Header = pageHeader
+		table := new(table)
+		table.Path = path
+		values, err := readValues(bytesReader, metadata.GetType(),
+			uint64(pageHeader.DictionaryPageHeader.GetNumValues()), 0)
+		if err != nil {
+			return nil, 0, 0, err
+		}
+		table.Values = getTableValues(values, metadata.GetType())
+		page.DataTable = table
+
+		return page, 0, 0, nil
+
+	case parquet.PageType_DATA_PAGE, parquet.PageType_DATA_PAGE_V2:
+		name := strings.Join(path, ".")
+
+		page = newDataPage()
+		page.Header = pageHeader
+
+		maxDefinitionLevel := getMaxDefLevel(columnNameIndexMap, schemaElements, path)
+		maxRepetitionLevel := getMaxRepLevel(columnNameIndexMap, schemaElements, path)
+
+		var numValues uint64
+		var encodingType parquet.Encoding
+
+		if pageHeader.GetType() == parquet.PageType_DATA_PAGE {
+			numValues = uint64(pageHeader.DataPageHeader.GetNumValues())
+			encodingType = pageHeader.DataPageHeader.GetEncoding()
+		} else {
+			numValues = uint64(pageHeader.DataPageHeaderV2.GetNumValues())
+			encodingType = pageHeader.DataPageHeaderV2.GetEncoding()
+		}
+
+		var repetitionLevels []int64
+		if maxRepetitionLevel > 0 {
+			values, _, err := readDataPageValues(bytesReader, parquet.Encoding_RLE, parquet.Type_INT64,
+				-1, numValues, getBitWidth(uint64(maxRepetitionLevel)))
+			if err != nil {
+				return nil, 0, 0, err
+			}
+
+			if repetitionLevels = values.([]int64); uint64(len(repetitionLevels)) > numValues {
+				repetitionLevels = repetitionLevels[:numValues]
+			}
+		} else {
+			repetitionLevels = make([]int64, numValues)
+		}
+
+		var definitionLevels []int64
+		if maxDefinitionLevel > 0 {
+			values, _, err := readDataPageValues(bytesReader, parquet.Encoding_RLE, parquet.Type_INT64,
+				-1, numValues, getBitWidth(uint64(maxDefinitionLevel)))
+			if err != nil {
+				return nil, 0, 0, err
+			}
+			if definitionLevels = values.([]int64); uint64(len(definitionLevels)) > numValues {
+				definitionLevels = definitionLevels[:numValues]
+			}
+		} else {
+			definitionLevels = make([]int64, numValues)
+		}
+
+		var numNulls uint64
+		for i := 0; i < len(definitionLevels); i++ {
+			if definitionLevels[i] != int64(maxDefinitionLevel) {
+				numNulls++
+			}
+		}
+
+		var convertedType parquet.ConvertedType = -1
+		if schemaElements[columnNameIndexMap[name]].IsSetConvertedType() {
+			convertedType = schemaElements[columnNameIndexMap[name]].GetConvertedType()
+		}
+		values, valueType, err := readDataPageValues(bytesReader, encodingType, metadata.GetType(),
+			convertedType, uint64(len(definitionLevels))-numNulls,
+			uint64(schemaElements[columnNameIndexMap[name]].GetTypeLength()))
+		if err != nil {
+			return nil, 0, 0, err
+		}
+		tableValues := getTableValues(values, valueType)
+
+		table := new(table)
+		table.Path = path
+		table.RepetitionType = schemaElements[columnNameIndexMap[name]].GetRepetitionType()
+		table.MaxRepetitionLevel = int32(maxRepetitionLevel)
+		table.MaxDefinitionLevel = int32(maxDefinitionLevel)
+		table.Values = make([]interface{}, len(definitionLevels))
+		table.RepetitionLevels = make([]int32, len(definitionLevels))
+		table.DefinitionLevels = make([]int32, len(definitionLevels))
+
+		j := 0
+		numRows := int64(0)
+		for i := 0; i < len(definitionLevels); i++ {
+			table.RepetitionLevels[i] = int32(repetitionLevels[i])
+			table.DefinitionLevels[i] = int32(definitionLevels[i])
+			if int(table.DefinitionLevels[i]) == maxDefinitionLevel {
+				table.Values[i] = tableValues[j]
+				j++
+			}
+			if table.RepetitionLevels[i] == 0 {
+				numRows++
+			}
+		}
+		page.DataTable = table
+
+		return page, int64(len(definitionLevels)), numRows, nil
+	}
+
+	return nil, 0, 0, fmt.Errorf("unknown page type %v", pageType)
+}
+
+type page struct {
+	Header       *parquet.PageHeader      // Header of a page
+	DataTable    *table                   // Table to store values
+	RawData      []byte                   // Compressed data of the page, which is written in parquet file
+	CompressType parquet.CompressionCodec // Compress type: gzip/snappy/none
+	DataType     parquet.Type             // Parquet type of the values in the page
+	Path         []string                 // Path in schema(include the root)
+	MaxVal       interface{}              // Maximum of the values
+	MinVal       interface{}              // Minimum of the values
+	PageSize     int32
+}
+
+func newPage() *page {
+	return &page{
+		Header:   parquet.NewPageHeader(),
+		PageSize: 8 * 1024,
+	}
+}
+
+func newDictPage() *page {
+	page := newPage()
+	page.Header.DictionaryPageHeader = parquet.NewDictionaryPageHeader()
+	return page
+}
+
+func newDataPage() *page {
+	page := newPage()
+	page.Header.DataPageHeader = parquet.NewDataPageHeader()
+	return page
+}
+
+func (page *page) decode(dictPage *page) {
+	if dictPage == nil || page == nil || page.Header.DataPageHeader == nil ||
+		(page.Header.DataPageHeader.Encoding != parquet.Encoding_RLE_DICTIONARY &&
+			page.Header.DataPageHeader.Encoding != parquet.Encoding_PLAIN_DICTIONARY) {
+		return
+	}
+
+	for i := 0; i < len(page.DataTable.Values); i++ {
+		if page.DataTable.Values[i] != nil {
+			index := page.DataTable.Values[i].(int64)
+			page.DataTable.Values[i] = dictPage.DataTable.Values[index]
+		}
+	}
+}
+
+// Get RepetitionLevels and Definitions from RawData
+func (page *page) getRLDLFromRawData(columnNameIndexMap map[string]int, schemaElements []*parquet.SchemaElement) (numValues int64, numRows int64, err error) {
+	bytesReader := bytes.NewReader(page.RawData)
+
+	pageType := page.Header.GetType()
+
+	var buf []byte
+	if pageType == parquet.PageType_DATA_PAGE_V2 {
+		var repLevelsLen, defLevelsLen int32
+		var repLevelsBuf, defLevelsBuf []byte
+
+		repLevelsLen = page.Header.DataPageHeaderV2.GetRepetitionLevelsByteLength()
+		repLevelsBuf = make([]byte, repLevelsLen)
+		if _, err = bytesReader.Read(repLevelsBuf); err != nil {
+			return 0, 0, err
+		}
+
+		defLevelsLen = page.Header.DataPageHeaderV2.GetDefinitionLevelsByteLength()
+		defLevelsBuf = make([]byte, defLevelsLen)
+		if _, err = bytesReader.Read(defLevelsBuf); err != nil {
+			return 0, 0, err
+		}
+
+		dataBuf := make([]byte, len(page.RawData)-int(repLevelsLen)-int(defLevelsLen))
+		if _, err = bytesReader.Read(dataBuf); err != nil {
+			return 0, 0, err
+		}
+
+		if repLevelsLen == 0 && defLevelsLen == 0 {
+			buf = dataBuf
+		} else {
+			if repLevelsLen > 0 {
+				buf = append(buf, uint32ToBytes(uint32(repLevelsLen))...)
+				buf = append(buf, repLevelsBuf...)
+			}
+
+			if defLevelsLen > 0 {
+				buf = append(buf, uint32ToBytes(uint32(defLevelsLen))...)
+				buf = append(buf, defLevelsBuf...)
+			}
+
+			buf = append(buf, dataBuf...)
+		}
+	} else {
+		if buf, err = compressionCodec(page.CompressType).uncompress(page.RawData); err != nil {
+			return 0, 0, err
+		}
+	}
+
+	bytesReader = bytes.NewReader(buf)
+
+	switch pageType {
+	case parquet.PageType_DICTIONARY_PAGE:
+		table := new(table)
+		table.Path = page.Path
+		page.DataTable = table
+		return 0, 0, nil
+
+	case parquet.PageType_DATA_PAGE, parquet.PageType_DATA_PAGE_V2:
+		var numValues uint64
+		if pageType == parquet.PageType_DATA_PAGE {
+			numValues = uint64(page.Header.DataPageHeader.GetNumValues())
+		} else {
+			numValues = uint64(page.Header.DataPageHeaderV2.GetNumValues())
+		}
+
+		maxDefinitionLevel := getMaxDefLevel(columnNameIndexMap, schemaElements, page.Path)
+		maxRepetitionLevel := getMaxRepLevel(columnNameIndexMap, schemaElements, page.Path)
+
+		var repetitionLevels []int64
+		if maxRepetitionLevel > 0 {
+			values, _, err := readDataPageValues(bytesReader, parquet.Encoding_RLE, parquet.Type_INT64,
+				-1, numValues, getBitWidth(uint64(maxRepetitionLevel)))
+			if err != nil {
+				return 0, 0, err
+			}
+
+			if repetitionLevels = values.([]int64); uint64(len(repetitionLevels)) > numValues {
+				repetitionLevels = repetitionLevels[:numValues]
+			}
+		} else {
+			repetitionLevels = make([]int64, numValues)
+		}
+
+		var definitionLevels []int64
+		if maxDefinitionLevel > 0 {
+			values, _, err := readDataPageValues(bytesReader, parquet.Encoding_RLE, parquet.Type_INT64,
+				-1, numValues, getBitWidth(uint64(maxDefinitionLevel)))
+			if err != nil {
+				return 0, 0, err
+			}
+			if definitionLevels = values.([]int64); uint64(len(definitionLevels)) > numValues {
+				definitionLevels = definitionLevels[:numValues]
+			}
+		} else {
+			definitionLevels = make([]int64, numValues)
+		}
+
+		table := new(table)
+		table.Path = page.Path
+		name := strings.Join(page.Path, ".")
+		table.RepetitionType = schemaElements[columnNameIndexMap[name]].GetRepetitionType()
+		table.MaxRepetitionLevel = int32(maxRepetitionLevel)
+		table.MaxDefinitionLevel = int32(maxDefinitionLevel)
+		table.Values = make([]interface{}, len(definitionLevels))
+		table.RepetitionLevels = make([]int32, len(definitionLevels))
+		table.DefinitionLevels = make([]int32, len(definitionLevels))
+
+		numRows := int64(0)
+		for i := 0; i < len(definitionLevels); i++ {
+			table.RepetitionLevels[i] = int32(repetitionLevels[i])
+			table.DefinitionLevels[i] = int32(definitionLevels[i])
+			if table.RepetitionLevels[i] == 0 {
+				numRows++
+			}
+		}
+		page.DataTable = table
+		page.RawData = buf[len(buf)-bytesReader.Len():]
+
+		return int64(numValues), numRows, nil
+	}
+
+	return 0, 0, fmt.Errorf("Unsupported page type %v", pageType)
+}
+
+func (page *page) getValueFromRawData(columnNameIndexMap map[string]int, schemaElements []*parquet.SchemaElement) (err error) {
+	pageType := page.Header.GetType()
+	switch pageType {
+	case parquet.PageType_DICTIONARY_PAGE:
+		bytesReader := bytes.NewReader(page.RawData)
+		var values interface{}
+		values, err = readValues(bytesReader, page.DataType,
+			uint64(page.Header.DictionaryPageHeader.GetNumValues()), 0)
+		if err != nil {
+			return err
+		}
+
+		page.DataTable.Values = getTableValues(values, page.DataType)
+		return nil
+
+	case parquet.PageType_DATA_PAGE_V2:
+		if page.RawData, err = compressionCodec(page.CompressType).uncompress(page.RawData); err != nil {
+			return err
+		}
+		fallthrough
+	case parquet.PageType_DATA_PAGE:
+		encodingType := page.Header.DataPageHeader.GetEncoding()
+		bytesReader := bytes.NewReader(page.RawData)
+
+		var numNulls uint64
+		for i := 0; i < len(page.DataTable.DefinitionLevels); i++ {
+			if page.DataTable.DefinitionLevels[i] != page.DataTable.MaxDefinitionLevel {
+				numNulls++
+			}
+		}
+
+		name := strings.Join(page.DataTable.Path, ".")
+		var convertedType parquet.ConvertedType = -1
+
+		if schemaElements[columnNameIndexMap[name]].IsSetConvertedType() {
+			convertedType = schemaElements[columnNameIndexMap[name]].GetConvertedType()
+		}
+
+		values, _, err := readDataPageValues(bytesReader, encodingType, page.DataType,
+			convertedType, uint64(len(page.DataTable.DefinitionLevels))-numNulls,
+			uint64(schemaElements[columnNameIndexMap[name]].GetTypeLength()))
+		if err != nil {
+			return err
+		}
+
+		tableValues := getTableValues(values, page.DataType)
+
+		j := 0
+		for i := 0; i < len(page.DataTable.DefinitionLevels); i++ {
+			if page.DataTable.DefinitionLevels[i] == page.DataTable.MaxDefinitionLevel {
+				page.DataTable.Values[i] = tableValues[j]
+				j++
+			}
+		}
+
+		page.RawData = []byte{}
+		return nil
+	}
+
+	return fmt.Errorf("unsupported page type %v", pageType)
+}

vendor/github.com/minio/parquet-go/parquet.go

@@ -0,0 +1,162 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package parquet
+
+import (
+	"encoding/binary"
+	"encoding/json"
+	"io"
+
+	"git.apache.org/thrift.git/lib/go/thrift"
+	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/parquet-go/gen-go/parquet"
+)
+
+// GetReaderFunc - function type returning io.ReadCloser for requested offset/length.
+type GetReaderFunc func(offset, length int64) (io.ReadCloser, error)
+
+func footerSize(getReaderFunc GetReaderFunc) (size int64, err error) {
+	rc, err := getReaderFunc(-8, 4)
+	if err != nil {
+		return 0, err
+	}
+	defer rc.Close()
+
+	buf := make([]byte, 4)
+	if _, err = io.ReadFull(rc, buf); err != nil {
+		return 0, err
+	}
+
+	size = int64(binary.LittleEndian.Uint32(buf))
+
+	return size, nil
+}
+
+func fileMetadata(getReaderFunc GetReaderFunc) (*parquet.FileMetaData, error) {
+	size, err := footerSize(getReaderFunc)
+	if err != nil {
+		return nil, err
+	}
+
+	rc, err := getReaderFunc(-(8 + size), size)
+	if err != nil {
+		return nil, err
+	}
+	defer rc.Close()
+
+	fileMeta := parquet.NewFileMetaData()
+
+	pf := thrift.NewTCompactProtocolFactory()
+	protocol := pf.GetProtocol(thrift.NewStreamTransportR(rc))
+	err = fileMeta.Read(protocol)
+	if err != nil {
+		return nil, err
+	}
+
+	return fileMeta, nil
+}
+
+// Value - denotes column value
+type Value struct {
+	Value interface{}
+	Type  parquet.Type
+}
+
+// MarshalJSON - encodes to JSON data
+func (value Value) MarshalJSON() (data []byte, err error) {
+	return json.Marshal(value.Value)
+}
+
+// File - denotes parquet file.
+type File struct {
+	getReaderFunc  GetReaderFunc
+	schemaElements []*parquet.SchemaElement
+	rowGroups      []*parquet.RowGroup
+	rowGroupIndex  int
+
+	columnNames set.StringSet
+	columns     map[string]*column
+	rowIndex    int64
+}
+
+// Open - opens parquet file with given column names.
+func Open(getReaderFunc GetReaderFunc, columnNames set.StringSet) (*File, error) {
+	fileMeta, err := fileMetadata(getReaderFunc)
+	if err != nil {
+		return nil, err
+	}
+
+	return &File{
+		getReaderFunc:  getReaderFunc,
+		rowGroups:      fileMeta.GetRowGroups(),
+		schemaElements: fileMeta.GetSchema(),
+		columnNames:    columnNames,
+	}, nil
+}
+
+// Read - reads single record.
+func (file *File) Read() (record map[string]Value, err error) {
+	if file.rowGroupIndex >= len(file.rowGroups) {
+		return nil, io.EOF
+	}
+
+	if file.columns == nil {
+		file.columns, err = getColumns(
+			file.rowGroups[file.rowGroupIndex],
+			file.columnNames,
+			file.schemaElements,
+			file.getReaderFunc,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		file.rowIndex = 0
+	}
+
+	if file.rowIndex >= file.rowGroups[file.rowGroupIndex].GetNumRows() {
+		file.rowGroupIndex++
+		file.Close()
+		return file.Read()
+	}
+
+	record = make(map[string]Value)
+	for name := range file.columns {
+		value, valueType := file.columns[name].read()
+		record[name] = Value{value, valueType}
+	}
+
+	file.rowIndex++
+
+	return record, nil
+}
+
+// Close - closes underneath readers.
+func (file *File) Close() (err error) {
+	if file.columns != nil {
+		return nil
+	}
+
+	for _, column := range file.columns {
+		column.close()
+	}
+
+	file.columns = nil
+	file.rowIndex = 0
+
+	return nil
+}

vendor/github.com/minio/parquet-go/parquet.thrift

@@ -0,0 +1,881 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/**
+ * File format description for the parquet file format
+ */
+namespace cpp parquet
+namespace java org.apache.parquet.format
+
+/**
+ * Types supported by Parquet.  These types are intended to be used in combination
+ * with the encodings to control the on disk storage format.
+ * For example INT16 is not included as a type since a good encoding of INT32
+ * would handle this.
+ */
+enum Type {
+  BOOLEAN = 0;
+  INT32 = 1;
+  INT64 = 2;
+  INT96 = 3;  // deprecated, only used by legacy implementations.
+  FLOAT = 4;
+  DOUBLE = 5;
+  BYTE_ARRAY = 6;
+  FIXED_LEN_BYTE_ARRAY = 7;
+}
+
+/**
+ * Common types used by frameworks(e.g. hive, pig) using parquet.  This helps map
+ * between types in those frameworks to the base types in parquet.  This is only
+ * metadata and not needed to read or write the data.
+ */
+enum ConvertedType {
+  /** a BYTE_ARRAY actually contains UTF8 encoded chars */
+  UTF8 = 0;
+
+  /** a map is converted as an optional field containing a repeated key/value pair */
+  MAP = 1;
+
+  /** a key/value pair is converted into a group of two fields */
+  MAP_KEY_VALUE = 2;
+
+  /** a list is converted into an optional field containing a repeated field for its
+   * values */
+  LIST = 3;
+
+  /** an enum is converted into a binary field */
+  ENUM = 4;
+
+  /**
+   * A decimal value.
+   *
+   * This may be used to annotate binary or fixed primitive types. The
+   * underlying byte array stores the unscaled value encoded as two's
+   * complement using big-endian byte order (the most significant byte is the
+   * zeroth element). The value of the decimal is the value * 10^{-scale}.
+   *
+   * This must be accompanied by a (maximum) precision and a scale in the
+   * SchemaElement. The precision specifies the number of digits in the decimal
+   * and the scale stores the location of the decimal point. For example 1.23
+   * would have precision 3 (3 total digits) and scale 2 (the decimal point is
+   * 2 digits over).
+   */
+  DECIMAL = 5;
+
+  /**
+   * A Date
+   *
+   * Stored as days since Unix epoch, encoded as the INT32 physical type.
+   *
+   */
+  DATE = 6;
+
+  /**
+   * A time
+   *
+   * The total number of milliseconds since midnight.  The value is stored
+   * as an INT32 physical type.
+   */
+  TIME_MILLIS = 7;
+
+  /**
+   * A time.
+   *
+   * The total number of microseconds since midnight.  The value is stored as
+   * an INT64 physical type.
+   */
+  TIME_MICROS = 8;
+
+  /**
+   * A date/time combination
+   *
+   * Date and time recorded as milliseconds since the Unix epoch.  Recorded as
+   * a physical type of INT64.
+   */
+  TIMESTAMP_MILLIS = 9;
+
+  /**
+   * A date/time combination
+   *
+   * Date and time recorded as microseconds since the Unix epoch.  The value is
+   * stored as an INT64 physical type.
+   */
+  TIMESTAMP_MICROS = 10;
+
+
+  /**
+   * An unsigned integer value.
+   *
+   * The number describes the maximum number of meainful data bits in
+   * the stored value. 8, 16 and 32 bit values are stored using the
+   * INT32 physical type.  64 bit values are stored using the INT64
+   * physical type.
+   *
+   */
+  UINT_8 = 11;
+  UINT_16 = 12;
+  UINT_32 = 13;
+  UINT_64 = 14;
+
+  /**
+   * A signed integer value.
+   *
+   * The number describes the maximum number of meainful data bits in
+   * the stored value. 8, 16 and 32 bit values are stored using the
+   * INT32 physical type.  64 bit values are stored using the INT64
+   * physical type.
+   *
+   */
+  INT_8 = 15;
+  INT_16 = 16;
+  INT_32 = 17;
+  INT_64 = 18;
+
+  /**
+   * An embedded JSON document
+   *
+   * A JSON document embedded within a single UTF8 column.
+   */
+  JSON = 19;
+
+  /**
+   * An embedded BSON document
+   *
+   * A BSON document embedded within a single BINARY column.
+   */
+  BSON = 20;
+
+  /**
+   * An interval of time
+   *
+   * This type annotates data stored as a FIXED_LEN_BYTE_ARRAY of length 12
+   * This data is composed of three separate little endian unsigned
+   * integers.  Each stores a component of a duration of time.  The first
+   * integer identifies the number of months associated with the duration,
+   * the second identifies the number of days associated with the duration
+   * and the third identifies the number of milliseconds associated with
+   * the provided duration.  This duration of time is independent of any
+   * particular timezone or date.
+   */
+  INTERVAL = 21;
+}
+
+/**
+ * Representation of Schemas
+ */
+enum FieldRepetitionType {
+  /** This field is required (can not be null) and each record has exactly 1 value. */
+  REQUIRED = 0;
+
+  /** The field is optional (can be null) and each record has 0 or 1 values. */
+  OPTIONAL = 1;
+
+  /** The field is repeated and can contain 0 or more values */
+  REPEATED = 2;
+}
+
+/**
+ * Statistics per row group and per page
+ * All fields are optional.
+ */
+struct Statistics {
+   /**
+    * DEPRECATED: min and max value of the column. Use min_value and max_value.
+    *
+    * Values are encoded using PLAIN encoding, except that variable-length byte
+    * arrays do not include a length prefix.
+    *
+    * These fields encode min and max values determined by signed comparison
+    * only. New files should use the correct order for a column's logical type
+    * and store the values in the min_value and max_value fields.
+    *
+    * To support older readers, these may be set when the column order is
+    * signed.
+    */
+   1: optional binary max;
+   2: optional binary min;
+   /** count of null value in the column */
+   3: optional i64 null_count;
+   /** count of distinct values occurring */
+   4: optional i64 distinct_count;
+   /**
+    * Min and max values for the column, determined by its ColumnOrder.
+    *
+    * Values are encoded using PLAIN encoding, except that variable-length byte
+    * arrays do not include a length prefix.
+    */
+   5: optional binary max_value;
+   6: optional binary min_value;
+}
+
+/** Empty structs to use as logical type annotations */
+struct StringType {}  // allowed for BINARY, must be encoded with UTF-8
+struct UUIDType {}    // allowed for FIXED[16], must encoded raw UUID bytes
+struct MapType {}     // see LogicalTypes.md
+struct ListType {}    // see LogicalTypes.md
+struct EnumType {}    // allowed for BINARY, must be encoded with UTF-8
+struct DateType {}    // allowed for INT32
+
+/**
+ * Logical type to annotate a column that is always null.
+ *
+ * Sometimes when discovering the schema of existing data, values are always
+ * null and the physical type can't be determined. This annotation signals
+ * the case where the physical type was guessed from all null values.
+ */
+struct NullType {}    // allowed for any physical type, only null values stored
+
+/**
+ * Decimal logical type annotation
+ *
+ * To maintain forward-compatibility in v1, implementations using this logical
+ * type must also set scale and precision on the annotated SchemaElement.
+ *
+ * Allowed for physical types: INT32, INT64, FIXED, and BINARY
+ */
+struct DecimalType {
+  1: required i32 scale
+  2: required i32 precision
+}
+
+/** Time units for logical types */
+struct MilliSeconds {}
+struct MicroSeconds {}
+struct NanoSeconds {}
+union TimeUnit {
+  1: MilliSeconds MILLIS
+  2: MicroSeconds MICROS
+  3: NanoSeconds NANOS
+}
+
+/**
+ * Timestamp logical type annotation
+ *
+ * Allowed for physical types: INT64
+ */
+struct TimestampType {
+  1: required bool isAdjustedToUTC
+  2: required TimeUnit unit
+}
+
+/**
+ * Time logical type annotation
+ *
+ * Allowed for physical types: INT32 (millis), INT64 (micros, nanos)
+ */
+struct TimeType {
+  1: required bool isAdjustedToUTC
+  2: required TimeUnit unit
+}
+
+/**
+ * Integer logical type annotation
+ *
+ * bitWidth must be 8, 16, 32, or 64.
+ *
+ * Allowed for physical types: INT32, INT64
+ */
+struct IntType {
+  1: required byte bitWidth
+  2: required bool isSigned
+}
+
+/**
+ * Embedded JSON logical type annotation
+ *
+ * Allowed for physical types: BINARY
+ */
+struct JsonType {
+}
+
+/**
+ * Embedded BSON logical type annotation
+ *
+ * Allowed for physical types: BINARY
+ */
+struct BsonType {
+}
+
+/**
+ * LogicalType annotations to replace ConvertedType.
+ *
+ * To maintain compatibility, implementations using LogicalType for a
+ * SchemaElement must also set the corresponding ConvertedType from the
+ * following table.
+ */
+union LogicalType {
+  1:  StringType STRING       // use ConvertedType UTF8
+  2:  MapType MAP             // use ConvertedType MAP
+  3:  ListType LIST           // use ConvertedType LIST
+  4:  EnumType ENUM           // use ConvertedType ENUM
+  5:  DecimalType DECIMAL     // use ConvertedType DECIMAL
+  6:  DateType DATE           // use ConvertedType DATE
+  7:  TimeType TIME           // use ConvertedType TIME_MICROS or TIME_MILLIS
+  8:  TimestampType TIMESTAMP // use ConvertedType TIMESTAMP_MICROS or TIMESTAMP_MILLIS
+  // 9: reserved for INTERVAL
+  10: IntType INTEGER         // use ConvertedType INT_* or UINT_*
+  11: NullType UNKNOWN        // no compatible ConvertedType
+  12: JsonType JSON           // use ConvertedType JSON
+  13: BsonType BSON           // use ConvertedType BSON
+  14: UUIDType UUID
+}
+
+/**
+ * Represents a element inside a schema definition.
+ *  - if it is a group (inner node) then type is undefined and num_children is defined
+ *  - if it is a primitive type (leaf) then type is defined and num_children is undefined
+ * the nodes are listed in depth first traversal order.
+ */
+struct SchemaElement {
+  /** Data type for this field. Not set if the current element is a non-leaf node */
+  1: optional Type type;
+
+  /** If type is FIXED_LEN_BYTE_ARRAY, this is the byte length of the vales.
+   * Otherwise, if specified, this is the maximum bit length to store any of the values.
+   * (e.g. a low cardinality INT col could have this set to 3).  Note that this is
+   * in the schema, and therefore fixed for the entire file.
+   */
+  2: optional i32 type_length;
+
+  /** repetition of the field. The root of the schema does not have a repetition_type.
+   * All other nodes must have one */
+  3: optional FieldRepetitionType repetition_type;
+
+  /** Name of the field in the schema */
+  4: required string name;
+
+  /** Nested fields.  Since thrift does not support nested fields,
+   * the nesting is flattened to a single list by a depth-first traversal.
+   * The children count is used to construct the nested relationship.
+   * This field is not set when the element is a primitive type
+   */
+  5: optional i32 num_children;
+
+  /** When the schema is the result of a conversion from another model
+   * Used to record the original type to help with cross conversion.
+   */
+  6: optional ConvertedType converted_type;
+
+  /** Used when this column contains decimal data.
+   * See the DECIMAL converted type for more details.
+   */
+  7: optional i32 scale
+  8: optional i32 precision
+
+  /** When the original schema supports field ids, this will save the
+   * original field id in the parquet schema
+   */
+  9: optional i32 field_id;
+
+  /**
+   * The logical type of this SchemaElement
+   *
+   * LogicalType replaces ConvertedType, but ConvertedType is still required
+   * for some logical types to ensure forward-compatibility in format v1.
+   */
+  10: optional LogicalType logicalType
+}
+
+/**
+ * Encodings supported by Parquet.  Not all encodings are valid for all types.  These
+ * enums are also used to specify the encoding of definition and repetition levels.
+ * See the accompanying doc for the details of the more complicated encodings.
+ */
+enum Encoding {
+  /** Default encoding.
+   * BOOLEAN - 1 bit per value. 0 is false; 1 is true.
+   * INT32 - 4 bytes per value.  Stored as little-endian.
+   * INT64 - 8 bytes per value.  Stored as little-endian.
+   * FLOAT - 4 bytes per value.  IEEE. Stored as little-endian.
+   * DOUBLE - 8 bytes per value.  IEEE. Stored as little-endian.
+   * BYTE_ARRAY - 4 byte length stored as little endian, followed by bytes.
+   * FIXED_LEN_BYTE_ARRAY - Just the bytes.
+   */
+  PLAIN = 0;
+
+  /** Group VarInt encoding for INT32/INT64.
+   * This encoding is deprecated. It was never used
+   */
+  //  GROUP_VAR_INT = 1;
+
+  /**
+   * Deprecated: Dictionary encoding. The values in the dictionary are encoded in the
+   * plain type.
+   * in a data page use RLE_DICTIONARY instead.
+   * in a Dictionary page use PLAIN instead
+   */
+  PLAIN_DICTIONARY = 2;
+
+  /** Group packed run length encoding. Usable for definition/repetition levels
+   * encoding and Booleans (on one bit: 0 is false; 1 is true.)
+   */
+  RLE = 3;
+
+  /** Bit packed encoding.  This can only be used if the data has a known max
+   * width.  Usable for definition/repetition levels encoding.
+   */
+  BIT_PACKED = 4;
+
+  /** Delta encoding for integers. This can be used for int columns and works best
+   * on sorted data
+   */
+  DELTA_BINARY_PACKED = 5;
+
+  /** Encoding for byte arrays to separate the length values and the data. The lengths
+   * are encoded using DELTA_BINARY_PACKED
+   */
+  DELTA_LENGTH_BYTE_ARRAY = 6;
+
+  /** Incremental-encoded byte array. Prefix lengths are encoded using DELTA_BINARY_PACKED.
+   * Suffixes are stored as delta length byte arrays.
+   */
+  DELTA_BYTE_ARRAY = 7;
+
+  /** Dictionary encoding: the ids are encoded using the RLE encoding
+   */
+  RLE_DICTIONARY = 8;
+}
+
+/**
+ * Supported compression algorithms.
+ *
+ * Codecs added in 2.4 can be read by readers based on 2.4 and later.
+ * Codec support may vary between readers based on the format version and
+ * libraries available at runtime. Gzip, Snappy, and LZ4 codecs are
+ * widely available, while Zstd and Brotli require additional libraries.
+ */
+enum CompressionCodec {
+  UNCOMPRESSED = 0;
+  SNAPPY = 1;
+  GZIP = 2;
+  LZO = 3;
+  BROTLI = 4; // Added in 2.4
+  LZ4 = 5;    // Added in 2.4
+  ZSTD = 6;   // Added in 2.4
+}
+
+enum PageType {
+  DATA_PAGE = 0;
+  INDEX_PAGE = 1;
+  DICTIONARY_PAGE = 2;
+  DATA_PAGE_V2 = 3;
+}
+
+/**
+ * Enum to annotate whether lists of min/max elements inside ColumnIndex
+ * are ordered and if so, in which direction.
+ */
+enum BoundaryOrder {
+  UNORDERED = 0;
+  ASCENDING = 1;
+  DESCENDING = 2;
+}
+
+/** Data page header */
+struct DataPageHeader {
+  /** Number of values, including NULLs, in this data page. **/
+  1: required i32 num_values
+
+  /** Encoding used for this data page **/
+  2: required Encoding encoding
+
+  /** Encoding used for definition levels **/
+  3: required Encoding definition_level_encoding;
+
+  /** Encoding used for repetition levels **/
+  4: required Encoding repetition_level_encoding;
+
+  /** Optional statistics for the data in this page**/
+  5: optional Statistics statistics;
+}
+
+struct IndexPageHeader {
+  /** TODO: **/
+}
+
+struct DictionaryPageHeader {
+  /** Number of values in the dictionary **/
+  1: required i32 num_values;
+
+  /** Encoding using this dictionary page **/
+  2: required Encoding encoding
+
+  /** If true, the entries in the dictionary are sorted in ascending order **/
+  3: optional bool is_sorted;
+}
+
+/**
+ * New page format allowing reading levels without decompressing the data
+ * Repetition and definition levels are uncompressed
+ * The remaining section containing the data is compressed if is_compressed is true
+ **/
+struct DataPageHeaderV2 {
+  /** Number of values, including NULLs, in this data page. **/
+  1: required i32 num_values
+  /** Number of NULL values, in this data page.
+      Number of non-null = num_values - num_nulls which is also the number of values in the data section **/
+  2: required i32 num_nulls
+  /** Number of rows in this data page. which means pages change on record boundaries (r = 0) **/
+  3: required i32 num_rows
+  /** Encoding used for data in this page **/
+  4: required Encoding encoding
+
+  // repetition levels and definition levels are always using RLE (without size in it)
+
+  /** length of the definition levels */
+  5: required i32 definition_levels_byte_length;
+  /** length of the repetition levels */
+  6: required i32 repetition_levels_byte_length;
+
+  /**  whether the values are compressed.
+  Which means the section of the page between
+  definition_levels_byte_length + repetition_levels_byte_length + 1 and compressed_page_size (included)
+  is compressed with the compression_codec.
+  If missing it is considered compressed */
+  7: optional bool is_compressed = 1;
+
+  /** optional statistics for this column chunk */
+  8: optional Statistics statistics;
+}
+
+struct PageHeader {
+  /** the type of the page: indicates which of the *_header fields is set **/
+  1: required PageType type
+
+  /** Uncompressed page size in bytes (not including this header) **/
+  2: required i32 uncompressed_page_size
+
+  /** Compressed page size in bytes (not including this header) **/
+  3: required i32 compressed_page_size
+
+  /** 32bit crc for the data below. This allows for disabling checksumming in HDFS
+   *  if only a few pages needs to be read
+   **/
+  4: optional i32 crc
+
+  // Headers for page specific data.  One only will be set.
+  5: optional DataPageHeader data_page_header;
+  6: optional IndexPageHeader index_page_header;
+  7: optional DictionaryPageHeader dictionary_page_header;
+  8: optional DataPageHeaderV2 data_page_header_v2;
+}
+
+/**
+ * Wrapper struct to store key values
+ */
+ struct KeyValue {
+  1: required string key
+  2: optional string value
+}
+
+/**
+ * Wrapper struct to specify sort order
+ */
+struct SortingColumn {
+  /** The column index (in this row group) **/
+  1: required i32 column_idx
+
+  /** If true, indicates this column is sorted in descending order. **/
+  2: required bool descending
+
+  /** If true, nulls will come before non-null values, otherwise,
+   * nulls go at the end. */
+  3: required bool nulls_first
+}
+
+/**
+ * statistics of a given page type and encoding
+ */
+struct PageEncodingStats {
+
+  /** the page type (data/dic/...) **/
+  1: required PageType page_type;
+
+  /** encoding of the page **/
+  2: required Encoding encoding;
+
+  /** number of pages of this type with this encoding **/
+  3: required i32 count;
+
+}
+
+/**
+ * Description for column metadata
+ */
+struct ColumnMetaData {
+  /** Type of this column **/
+  1: required Type type
+
+  /** Set of all encodings used for this column. The purpose is to validate
+   * whether we can decode those pages. **/
+  2: required list<Encoding> encodings
+
+  /** Path in schema **/
+  3: required list<string> path_in_schema
+
+  /** Compression codec **/
+  4: required CompressionCodec codec
+
+  /** Number of values in this column **/
+  5: required i64 num_values
+
+  /** total byte size of all uncompressed pages in this column chunk (including the headers) **/
+  6: required i64 total_uncompressed_size
+
+  /** total byte size of all compressed pages in this column chunk (including the headers) **/
+  7: required i64 total_compressed_size
+
+  /** Optional key/value metadata **/
+  8: optional list<KeyValue> key_value_metadata
+
+  /** Byte offset from beginning of file to first data page **/
+  9: required i64 data_page_offset
+
+  /** Byte offset from beginning of file to root index page **/
+  10: optional i64 index_page_offset
+
+  /** Byte offset from the beginning of file to first (only) dictionary page **/
+  11: optional i64 dictionary_page_offset
+
+  /** optional statistics for this column chunk */
+  12: optional Statistics statistics;
+
+  /** Set of all encodings used for pages in this column chunk.
+   * This information can be used to determine if all data pages are
+   * dictionary encoded for example **/
+  13: optional list<PageEncodingStats> encoding_stats;
+}
+
+struct ColumnChunk {
+  /** File where column data is stored.  If not set, assumed to be same file as
+    * metadata.  This path is relative to the current file.
+    **/
+  1: optional string file_path
+
+  /** Byte offset in file_path to the ColumnMetaData **/
+  2: required i64 file_offset
+
+  /** Column metadata for this chunk. This is the same content as what is at
+   * file_path/file_offset.  Having it here has it replicated in the file
+   * metadata.
+   **/
+  3: optional ColumnMetaData meta_data
+
+  /** File offset of ColumnChunk's OffsetIndex **/
+  4: optional i64 offset_index_offset
+
+  /** Size of ColumnChunk's OffsetIndex, in bytes **/
+  5: optional i32 offset_index_length
+
+  /** File offset of ColumnChunk's ColumnIndex **/
+  6: optional i64 column_index_offset
+
+  /** Size of ColumnChunk's ColumnIndex, in bytes **/
+  7: optional i32 column_index_length
+}
+
+struct RowGroup {
+  /** Metadata for each column chunk in this row group.
+   * This list must have the same order as the SchemaElement list in FileMetaData.
+   **/
+  1: required list<ColumnChunk> columns
+
+  /** Total byte size of all the uncompressed column data in this row group **/
+  2: required i64 total_byte_size
+
+  /** Number of rows in this row group **/
+  3: required i64 num_rows
+
+  /** If set, specifies a sort ordering of the rows in this RowGroup.
+   * The sorting columns can be a subset of all the columns.
+   */
+  4: optional list<SortingColumn> sorting_columns
+}
+
+/** Empty struct to signal the order defined by the physical or logical type */
+struct TypeDefinedOrder {}
+
+/**
+ * Union to specify the order used for the min_value and max_value fields for a
+ * column. This union takes the role of an enhanced enum that allows rich
+ * elements (which will be needed for a collation-based ordering in the future).
+ *
+ * Possible values are:
+ * * TypeDefinedOrder - the column uses the order defined by its logical or
+ *                      physical type (if there is no logical type).
+ *
+ * If the reader does not support the value of this union, min and max stats
+ * for this column should be ignored.
+ */
+union ColumnOrder {
+
+  /**
+   * The sort orders for logical types are:
+   *   UTF8 - unsigned byte-wise comparison
+   *   INT8 - signed comparison
+   *   INT16 - signed comparison
+   *   INT32 - signed comparison
+   *   INT64 - signed comparison
+   *   UINT8 - unsigned comparison
+   *   UINT16 - unsigned comparison
+   *   UINT32 - unsigned comparison
+   *   UINT64 - unsigned comparison
+   *   DECIMAL - signed comparison of the represented value
+   *   DATE - signed comparison
+   *   TIME_MILLIS - signed comparison
+   *   TIME_MICROS - signed comparison
+   *   TIMESTAMP_MILLIS - signed comparison
+   *   TIMESTAMP_MICROS - signed comparison
+   *   INTERVAL - unsigned comparison
+   *   JSON - unsigned byte-wise comparison
+   *   BSON - unsigned byte-wise comparison
+   *   ENUM - unsigned byte-wise comparison
+   *   LIST - undefined
+   *   MAP - undefined
+   *
+   * In the absence of logical types, the sort order is determined by the physical type:
+   *   BOOLEAN - false, true
+   *   INT32 - signed comparison
+   *   INT64 - signed comparison
+   *   INT96 (only used for legacy timestamps) - undefined
+   *   FLOAT - signed comparison of the represented value (*)
+   *   DOUBLE - signed comparison of the represented value (*)
+   *   BYTE_ARRAY - unsigned byte-wise comparison
+   *   FIXED_LEN_BYTE_ARRAY - unsigned byte-wise comparison
+   *
+   * (*) Because the sorting order is not specified properly for floating
+   *     point values (relations vs. total ordering) the following
+   *     compatibility rules should be applied when reading statistics:
+   *     - If the min is a NaN, it should be ignored.
+   *     - If the max is a NaN, it should be ignored.
+   *     - If the min is +0, the row group may contain -0 values as well.
+   *     - If the max is -0, the row group may contain +0 values as well.
+   *     - When looking for NaN values, min and max should be ignored.
+   */
+  1: TypeDefinedOrder TYPE_ORDER;
+}
+
+struct PageLocation {
+  /** Offset of the page in the file **/
+  1: required i64 offset
+
+  /**
+   * Size of the page, including header. Sum of compressed_page_size and header
+   * length
+   */
+  2: required i32 compressed_page_size
+
+  /**
+   * Index within the RowGroup of the first row of the page; this means pages
+   * change on record boundaries (r = 0).
+   */
+  3: required i64 first_row_index
+}
+
+struct OffsetIndex {
+  /**
+   * PageLocations, ordered by increasing PageLocation.offset. It is required
+   * that page_locations[i].first_row_index < page_locations[i+1].first_row_index.
+   */
+  1: required list<PageLocation> page_locations
+}
+
+/**
+ * Description for ColumnIndex.
+ * Each <array-field>[i] refers to the page at OffsetIndex.page_locations[i]
+ */
+struct ColumnIndex {
+  /**
+   * A list of Boolean values to determine the validity of the corresponding
+   * min and max values. If true, a page contains only null values, and writers
+   * have to set the corresponding entries in min_values and max_values to
+   * byte[0], so that all lists have the same length. If false, the
+   * corresponding entries in min_values and max_values must be valid.
+   */
+  1: required list<bool> null_pages
+
+  /**
+   * Two lists containing lower and upper bounds for the values of each page.
+   * These may be the actual minimum and maximum values found on a page, but
+   * can also be (more compact) values that do not exist on a page. For
+   * example, instead of storing ""Blart Versenwald III", a writer may set
+   * min_values[i]="B", max_values[i]="C". Such more compact values must still
+   * be valid values within the column's logical type. Readers must make sure
+   * that list entries are populated before using them by inspecting null_pages.
+   */
+  2: required list<binary> min_values
+  3: required list<binary> max_values
+
+  /**
+   * Stores whether both min_values and max_values are orderd and if so, in
+   * which direction. This allows readers to perform binary searches in both
+   * lists. Readers cannot assume that max_values[i] <= min_values[i+1], even
+   * if the lists are ordered.
+   */
+  4: required BoundaryOrder boundary_order
+
+  /** A list containing the number of null values for each page **/
+  5: optional list<i64> null_counts
+}
+
+/**
+ * Description for file metadata
+ */
+struct FileMetaData {
+  /** Version of this file **/
+  1: required i32 version
+
+  /** Parquet schema for this file.  This schema contains metadata for all the columns.
+   * The schema is represented as a tree with a single root.  The nodes of the tree
+   * are flattened to a list by doing a depth-first traversal.
+   * The column metadata contains the path in the schema for that column which can be
+   * used to map columns to nodes in the schema.
+   * The first element is the root **/
+  2: required list<SchemaElement> schema;
+
+  /** Number of rows in this file **/
+  3: required i64 num_rows
+
+  /** Row groups in this file **/
+  4: required list<RowGroup> row_groups
+
+  /** Optional key/value metadata **/
+  5: optional list<KeyValue> key_value_metadata
+
+  /** String for application that wrote this file.  This should be in the format
+   * <Application> version <App Version> (build <App Build Hash>).
+   * e.g. impala version 1.0 (build 6cf94d29b2b7115df4de2c06e2ab4326d721eb55)
+   **/
+  6: optional string created_by
+
+  /**
+   * Sort order used for the min_value and max_value fields of each column in
+   * this file. Each sort order corresponds to one column, determined by its
+   * position in the list, matching the position of the column in the schema.
+   *
+   * Without column_orders, the meaning of the min_value and max_value fields is
+   * undefined. To ensure well-defined behaviour, if min_value and max_value are
+   * written to a Parquet file, column_orders must be written as well.
+   *
+   * The obsolete min and max fields are always sorted by signed comparison
+   * regardless of column_orders.
+   */
+  7: optional list<ColumnOrder> column_orders;
+}
+