SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    QualifiedAsterisk (children 1)
     Identifier Y
    QualifiedAsterisk (children 1)
     Identifier s
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier Y
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias s) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Asterisk
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier Y
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Function concat (children 1)
         ExpressionList (children 2)
          Literal \'n\'
          Identifier Y.y_a
        Identifier s.y_b
   ExpressionList (children 6)
    OrderByElement (children 1)
     Identifier Y.id
    OrderByElement (children 1)
     Identifier Y.y_a
    OrderByElement (children 1)
     Identifier Y.y_b
    OrderByElement (children 1)
     Identifier s.id
    OrderByElement (children 1)
     Identifier s.y_a
    OrderByElement (children 1)
     Identifier s.y_b