SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function sumMerge (alias z) (children 1)
     ExpressionList (children 1)
      Identifier y
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Function multiply (alias y) (children 1)
            ExpressionList (children 2)
             Function multiply (children 1)
              ExpressionList (children 2)
               Literal UInt64_3
               Function sumState (children 1)
                ExpressionList (children 1)
                 Identifier x
             Literal UInt64_2
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 2)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_1 (alias x)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_2 (alias x)
