simplifier

Documentation

Index

• func SimplifyExpr(in sqlparser.Expr, test CheckF) (smallestKnown sqlparser.Expr)
• func SimplifyStatement(in sqlparser.SelectStatement, currentDB string, si semantics.SchemaInformation, ...) sqlparser.SelectStatement
• type CheckF

Functions

func SimplifyExpr

func SimplifyExpr(in sqlparser.Expr, test CheckF) (smallestKnown sqlparser.Expr)

func SimplifyStatement

func SimplifyStatement(
	in sqlparser.SelectStatement,
	currentDB string,
	si semantics.SchemaInformation,
	testF func(sqlparser.SelectStatement) bool,
) sqlparser.SelectStatement

SimplifyStatement simplifies the AST of a query. It basically iteratively prunes leaves of the AST, as long as the pruning continues to return true from the `test` function.

Types

type CheckF

type CheckF = func(sqlparser.Expr) bool

CheckF is used to see if the given expression exhibits the sought after issue