query

package

v0.0.0-...-e6616ac Latest Latest Go to latest Published: Jan 20, 2026 License: Apache-2.0 Imports: 13 Imported by: 0

Details

This section is empty.

View Source

var ErrNoIndexAvb = errors.New("no index available to satisfy the WHERE query")

View Source

var ErrNoTable = errors.New("could not identify table in EXPLAIN output")

func FoldExpression(ctx context.Context, query string, db *sql.DB) (string, error)

FoldExpression returns modified query by replacing the occurrences of non-deterministic functions with deterministic values in the query.

func GetIndex(where string, db *sql.DB) (string, bool, error)

GetIndex returns the index used by the query and whether it's a covering index.

func ParseSelect(query string) (*ast.SelectStmt, error)

ParseSelect parses the given SQL query as a SELECT statement and returns AST (Abstract syntax tree) node if there is no error.

func Validate(query string, db *sql.DB) (string, error)

Validate validates the query and returns the where clause if it's valid.

type FoldableFnX struct {
	// contains filtered or unexported fields
}

FoldableFnX extracts foldableFns from AST node of a parsed SQL query.

func (v *FoldableFnX) Enter(in ast.Node) (ast.Node, bool)

func (v *FoldableFnX) Leave(in ast.Node) (ast.Node, bool)