SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function toUInt64 (alias x) (children 1)
     ExpressionList (children 1)
      Literal NULL
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal UInt64_1
   Function in (children 1)
    ExpressionList (children 2)
     Identifier x
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 2)
         ExpressionList (children 1)
          Literal NULL
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            Subquery (children 1)
             SelectWithUnionQuery (children 1)
              ExpressionList (children 1)
               SelectQuery (children 1)
                ExpressionList (children 1)
                 Function in (children 1)
                  ExpressionList (children 2)
                   Identifier x
                   Subquery (children 1)
                    SelectWithUnionQuery (children 1)
                     ExpressionList (children 1)
                      SelectQuery (children 2)
                       ExpressionList (children 2)
                        Function in (children 1)
                         ExpressionList (children 2)
                          Identifier x
                          Subquery (children 1)
                           SelectWithUnionQuery (children 1)
                            ExpressionList (children 1)
                             SelectQuery (children 1)
                              ExpressionList (children 1)
                               Literal UInt64_1
                        Function in (children 1)
                         ExpressionList (children 2)
                          Identifier x
                          Subquery (children 1)
                           SelectWithUnionQuery (children 1)
                            ExpressionList (children 1)
                             SelectQuery (children 1)
                              ExpressionList (children 1)
                               Literal UInt64_1
                       TablesInSelectQuery (children 1)
                        TablesInSelectQueryElement (children 1)
                         TableExpression (children 1)
                          Subquery (children 1)
                           SelectWithUnionQuery (children 1)
                            ExpressionList (children 1)
                             SelectQuery (children 2)
                              ExpressionList (children 1)
                               Literal UInt64_1
                              Function in (children 1)
                               ExpressionList (children 2)
                                Identifier x
                                Subquery (children 1)
                                 SelectWithUnionQuery (children 1)
                                  ExpressionList (children 1)
                                   SelectQuery (children 2)
                                    ExpressionList (children 1)
                                     Literal NULL
                                    TablesInSelectQuery (children 1)
                                     TablesInSelectQueryElement (children 1)
                                      TableExpression (children 1)
                                       Subquery (children 1)
                                        SelectWithUnionQuery (children 1)
                                         ExpressionList (children 1)
                                          SelectQuery (children 1)
                                           ExpressionList (children 1)
                                            Literal NULL
