SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Literal UInt64_4
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 2)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal UInt64_1 (alias X)
           Literal UInt64_2 (alias Y)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Literal UInt64_3
           Literal UInt64_4
          ExpressionList (children 1)
           Literal UInt64_2
   Function materialize (children 1)
    ExpressionList (children 1)
     Literal UInt64_4
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function materialize (children 1)
      ExpressionList (children 1)
       Literal UInt64_4
