func (nz *normalizer) WalkStatement(node SQLNode) (bool, error) {
	switch node := node.(type) {
	case *Select:
		_ = Walk(nz.WalkSelect, node)
		// Don't continue
		return false, nil
	case *SQLVal:
		nz.convertSQLVal(node)
	case *ComparisonExpr:
		nz.convertComparison(node)
	}
	return true, nil
}
func (nz *normalizer) WalkStatement(node SQLNode) (bool, error) {
	switch node := node.(type) {
	case *Select:
		_ = Walk(nz.WalkSelect, node)
		
		return false, nil
	case *SQLVal:
		nz.convertSQLVal(node)
	case *ComparisonExpr:
		nz.convertComparison(node)
	}
	return true, nil
}
func ( nz * normalizer ) WalkStatement ( node SQLNode ) ( bool , error ) { switch node := node . ( type ) { case * Select : _ = Walk ( nz . WalkSelect , node ) // Don't continue return false , nil case * SQLVal : nz . convertSQLVal ( node ) case * ComparisonExpr : nz . convertComparison ( node ) } return true , nil }
// WalkStatement is the top level walk function.
// If it encounters a Select, it switches to a mode
// where variables are deduped.
WalkStatement is the top level walk function . If it encounters a Select it switches to a mode where variables are deduped .