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Add JSON Path expression evaluation support (#7315)

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- Includes support for FROM clause JSON path
This commit is contained in:
Aditya Manthramurthy
2019-03-09 08:13:37 -08:00
committed by Harshavardhana
parent b296b3cf8b
commit e463386921
15 changed files with 488 additions and 59 deletions
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8
pkg/s3select/sql/parser.go
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@@ -57,7 +57,7 @@ type ObjectKey struct {
// quoted.
type QuotedIdentifier string
// Capture inferface used by participle
// Capture interface used by participle
func (qi *QuotedIdentifier) Capture(values []string) error {
// Remove enclosing quotes
n := len(values[0])
@@ -74,8 +74,8 @@ func (qi *QuotedIdentifier) Capture(values []string) error {
type Select struct {
Expression *SelectExpression `parser:"\"SELECT\" @@"`
From *TableExpression `parser:"\"FROM\" @@"`
Where *Expression `parser:"[ \"WHERE\" @@ ]"`
Limit *LitValue `parser:"[ \"LIMIT\" @@ ]"`
Where *Expression `parser:"( \"WHERE\" @@ )?"`
Limit *LitValue `parser:"( \"LIMIT\" @@ )?"`
}
// SelectExpression represents the items requested in the select
@@ -94,7 +94,7 @@ type TableExpression struct {
// JSONPathElement represents a keypath component
type JSONPathElement struct {
Key *ObjectKey `parser:" @@"` // ['name'] and .name forms
Index *uint64 `parser:"| \"[\" @Number \"]\""` // [3] form
Index *int `parser:"| \"[\" @Number \"]\""` // [3] form
ObjectWildcard bool `parser:"| @\".*\""` // .* form
ArrayWildcard bool `parser:"| @\"[*]\""` // [*] form
}