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c9b8bd8de2
Queue output items and reuse them. Remove the unneeded type system in sql and just use the Go type system. In best case this is more than an order of magnitude speedup: ``` BenchmarkSelectAll_1M-12 1 1841049400 ns/op 274299728 B/op 4198522 allocs/op BenchmarkSelectAll_1M-12 14 84833400 ns/op 169228346 B/op 3146541 allocs/op ```
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sql
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import (
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"io"
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"github.com/bcicen/jstream"
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)
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// SelectObjectFormat specifies the format of the underlying data
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type SelectObjectFormat int
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const (
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// SelectFmtUnknown - unknown format (default value)
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SelectFmtUnknown SelectObjectFormat = iota
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// SelectFmtCSV - CSV format
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SelectFmtCSV
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// SelectFmtJSON - JSON format
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SelectFmtJSON
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// SelectFmtParquet - Parquet format
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SelectFmtParquet
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)
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// Record - is a type containing columns and their values.
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type Record interface {
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Get(name string) (*Value, error)
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Set(name string, value *Value) error
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WriteCSV(writer io.Writer, fieldDelimiter rune) error
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WriteJSON(writer io.Writer) error
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// CopyFrom will copy all records from the incoming and append them to the existing records.
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// The source record must be of a similar type as destination.
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CopyFrom(src Record) error
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Reset()
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// Returns underlying representation
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Raw() (SelectObjectFormat, interface{})
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// Replaces the underlying data
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Replace(k jstream.KVS) error
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}
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