SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function in (children 1)
     ExpressionList (children 2)
      Function identity (children 1)
       ExpressionList (children 1)
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function tuple (children 1)
            ExpressionList (children 1)
             Literal UInt64_1