SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 4)
    Function length (children 1)
     ExpressionList (children 1)
      Identifier arr
    Function empty (children 1)
     ExpressionList (children 1)
      Identifier arr
    Function notEmpty (children 1)
     ExpressionList (children 1)
      Identifier arr
    Function empty (children 1)
     ExpressionList (children 1)
      Identifier n
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_func_to_subcolumns
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
