SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function isNotDistinctFrom (children 1)
     ExpressionList (children 2)
      Literal Tuple_(NULL, NULL, Tuple_(NULL, NULL, NULL))
      Literal Tuple_(NULL, NULL, Tuple_(NULL, NULL, NULL))
