Function getSelect

pkg/transform/columns.go:24–30

(stmt ast.Statement, transform string)

)

func getSelect(stmt ast.Statement, transform string) (*ast.SelectStatement, error) {
	sel, ok := stmt.(*ast.SelectStatement)
	if !ok {
		return nil, &ErrUnsupportedStatement{Transform: transform, Got: stmtTypeName(stmt)}
	}
	return sel, nil
}

// AddColumn returns a Rule that appends a column expression to the SELECT list of
// a SELECT statement. The expression may be any valid AST expression node such as