SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function isConstant (children 1)
     ExpressionList (children 1)
      Function 01856_test_function_0 (children 1)
       ExpressionList (children 3)
        Literal UInt64_1
        Literal UInt64_2
        Literal UInt64_3