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
      Function tuple (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal UInt64_2