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fix: sql cast function when converting to float (#11817)

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mailsmail 2021-03-19 23:14:38 +07:00 committed by GitHub
parent b5dcaaccb4
commit 27eb4ae3bc
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 43 additions and 20 deletions
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25
pkg/s3select/select_test.go
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@ -378,6 +378,31 @@ func TestJSONQueries(t *testing.T) {
query: `SELECT date_diff(day, '2010-01-01T23:00:00Z', '2010-01-02T23:00:00Z') FROM S3Object LIMIT 1`,
wantResult: `{"_1":1}`,
},
{
name: "cast_from_int_to_float",
query: `SELECT cast(1 as float) FROM S3Object LIMIT 1`,
wantResult: `{"_1":1}`,
},
{
name: "cast_from_float_to_float",
query: `SELECT cast(1.0 as float) FROM S3Object LIMIT 1`,
wantResult: `{"_1":1}`,
},
{
name: "arithmetic_integer_operand",
query: `SELECT 1 / 2 FROM S3Object LIMIT 1`,
wantResult: `{"_1":0}`,
},
{
name: "arithmetic_float_operand",
query: `SELECT 1.0 / 2.0 * .3 FROM S3Object LIMIT 1`,
wantResult: `{"_1":0.15}`,
},
{
name: "arithmetic_integer_float_operand",
query: `SELECT 3.0 / 2, 5 / 2.0 FROM S3Object LIMIT 1`,
wantResult: `{"_1":1.5,"_2":2.5}`,
},
}
defRequest := `<?xml version="1.0" encoding="UTF-8"?>

9
pkg/s3select/sql/evaluate.go
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@ -476,8 +476,13 @@ func (e *FuncExpr) evalNode(r Record) (res *Value, err error) {
// aggregation or a row function - it always returns a value.
func (e *LitValue) evalNode(_ Record) (res *Value, err error) {
switch {
case e.Number != nil:
return floatToValue(*e.Number), nil
case e.Int != nil:
if *e.Int < math.MaxInt64 && *e.Int > math.MinInt64 {
return FromInt(int64(*e.Int)), nil
}
return FromFloat(*e.Int), nil
case e.Float != nil:
return FromFloat(*e.Float), nil
case e.String != nil:
return FromString(string(*e.String)), nil
case e.Boolean != nil:

2
pkg/s3select/sql/funceval.go
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@ -492,7 +492,7 @@ func floatCast(v *Value) (float64, error) {
switch x := v.value.(type) {
case float64:
return x, nil
case int:
case int64:
return float64(x), nil
case string:
f, err := strconv.ParseFloat(strings.TrimSpace(x), 64)

14
pkg/s3select/sql/parser.go
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@ -106,10 +106,10 @@ type TableExpression struct {
// JSONPathElement represents a keypath component
type JSONPathElement struct {
Key *ObjectKey `parser:" @@"` // ['name'] and .name forms
Index *int `parser:"| \"[\" @Number \"]\""` // [3] form
ObjectWildcard bool `parser:"| @\".*\""` // .* form
ArrayWildcard bool `parser:"| @\"[*]\""` // [*] form
Key *ObjectKey `parser:" @@"` // ['name'] and .name forms
Index *int `parser:"| \"[\" @Int \"]\""` // [3] form
ObjectWildcard bool `parser:"| @\".*\""` // .* form
ArrayWildcard bool `parser:"| @\"[*]\""` // [*] form
}
// JSONPath represents a keypath.
@ -333,7 +333,8 @@ type DateDiffFunc struct {
// LitValue represents a literal value parsed from the sql
type LitValue struct {
Number *float64 `parser:"( @Number"`
Float *float64 `parser:"( @Float"`
Int *float64 `parser:" | @Int"` // To avoid value out of range, use float64 instead
String *LiteralString `parser:" | @LitString"`
Boolean *Boolean `parser:" | @(\"TRUE\" | \"FALSE\")"`
Null bool `parser:" | @\"NULL\")"`
@ -351,7 +352,8 @@ var (
`|(?P<Keyword>(?i)\b(?:SELECT|FROM|TOP|DISTINCT|ALL|WHERE|GROUP|BY|HAVING|UNION|MINUS|EXCEPT|INTERSECT|ORDER|LIMIT|OFFSET|TRUE|FALSE|NULL|IS|NOT|ANY|SOME|BETWEEN|AND|OR|LIKE|ESCAPE|AS|IN|BOOL|INT|INTEGER|STRING|FLOAT|DECIMAL|NUMERIC|TIMESTAMP|AVG|COUNT|MAX|MIN|SUM|COALESCE|NULLIF|CAST|DATE_ADD|DATE_DIFF|EXTRACT|TO_STRING|TO_TIMESTAMP|UTCNOW|CHAR_LENGTH|CHARACTER_LENGTH|LOWER|SUBSTRING|TRIM|UPPER|LEADING|TRAILING|BOTH|FOR)\b)` +
`|(?P<Ident>[a-zA-Z_][a-zA-Z0-9_]*)` +
`|(?P<QuotIdent>"([^"]*("")?)*")` +
`|(?P<Number>\d*\.?\d+([eE][-+]?\d+)?)` +
`|(?P<Float>\d*\.\d+([eE][-+]?\d+)?)` +
`|(?P<Int>\d+)` +
`|(?P<LitString>'([^']*('')?)*')` +
`|(?P<Operators><>|!=|<=|>=|\.\*|\[\*\]|[-+*/%,.()=<>\[\]])`,
))

4
pkg/s3select/sql/statement.go
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@ -127,10 +127,10 @@ func parseLimit(v *LitValue) (int64, error) {
switch {
case v == nil:
return -1, nil
case v.Number == nil:
case v.Int == nil:
return -1, errBadLimitSpecified
default:
r := int64(*v.Number)
r := int64(*v.Int)
if r < 0 {
return -1, errBadLimitSpecified
}

9
pkg/s3select/sql/value.go
View File

@ -306,15 +306,6 @@ func (v Value) CSVString() string {
}
}
// floatToValue converts a float into int representation if needed.
func floatToValue(f float64) *Value {
intPart, fracPart := math.Modf(f)
if fracPart == 0 && intPart < math.MaxInt64 && intPart > math.MinInt64 {
return FromInt(int64(intPart))
}
return FromFloat(f)
}
// negate negates a numeric value
func (v *Value) negate() {
switch x := v.value.(type) {