func (nz *normalizer) WalkSelect(node SQLNode) (bool, error) {
	switch node := node.(type) {
	case *SQLVal:
		nz.convertSQLValDedup(node)
	case *ComparisonExpr:
		nz.convertComparison(node)
	}
	return true, nil
}
func (nz *normalizer) WalkSelect(node SQLNode) (bool, error) {
	switch node := node.(type) {
	case *SQLVal:
		nz.convertSQLValDedup(node)
	case *ComparisonExpr:
		nz.convertComparison(node)
	}
	return true, nil
}
func ( nz * normalizer ) WalkSelect ( node SQLNode ) ( bool , error ) { switch node := node . ( type ) { case * SQLVal : nz . convertSQLValDedup ( node ) case * ComparisonExpr : nz . convertComparison ( node ) } return true , nil }
// WalkSelect normalizes the AST in Select mode.
WalkSelect normalizes the AST in Select mode .