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Documentation

Index

• func ExtractSelectAndNormalizeDigest(stmtNode ast.StmtNode, specifiledDB string) (ast.StmtNode, string, string, error)
• func IsReadOnly(node ast.Node, vars *variable.SessionVars) bool
• func Optimize(ctx context.Context, sctx sessionctx.Context, node ast.Node, ...) (core.Plan, types.NameSlice, error)
• func OptimizeExecStmt(ctx context.Context, sctx sessionctx.Context, execAst *ast.ExecuteStmt, ...) (core.Plan, types.NameSlice, error)
• func OptimizeForForeignKeyCascade(ctx context.Context, sctx sessionctx.Context, node ast.StmtNode, ...) (core.Plan, error)

Functions

func ExtractSelectAndNormalizeDigest

func ExtractSelectAndNormalizeDigest(stmtNode ast.StmtNode, specifiledDB string) (ast.StmtNode, string, string, error)

ExtractSelectAndNormalizeDigest extract the select statement and normalize it.

func IsReadOnly

func IsReadOnly(node ast.Node, vars *variable.SessionVars) bool

IsReadOnly check whether the ast.Node is a read only statement.

func Optimize

func Optimize(ctx context.Context, sctx sessionctx.Context, node ast.Node, is infoschema.InfoSchema) (core.Plan, types.NameSlice, error)

Optimize does optimization and creates a Plan. The node must be prepared first.

func OptimizeExecStmt

func OptimizeExecStmt(ctx context.Context, sctx sessionctx.Context,
	execAst *ast.ExecuteStmt, is infoschema.InfoSchema) (core.Plan, types.NameSlice, error)

OptimizeExecStmt to handle the "execute" statement

func OptimizeForForeignKeyCascade

func OptimizeForForeignKeyCascade(ctx context.Context, sctx sessionctx.Context, node ast.StmtNode, is infoschema.InfoSchema) (core.Plan, error)

OptimizeForForeignKeyCascade does optimization and creates a Plan for foreign key cascade. The node must be prepared first. Compare to Optimize, OptimizeForForeignKeyCascade only build plan by StmtNode, doesn't consider plan cache and plan binding, also doesn't do privilege check.