SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Asterisk
           Function plus (alias x) (children 1)
            ExpressionList (children 2)
             Identifier a
             Identifier b
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier tab
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function multiply (children 1)
      ExpressionList (children 2)
       Identifier x
       Identifier c
