Hi Tom,
Thanks for all your great feedback.
> No, it'd be O(N^2) for an N-deep reference chain. Admittedly,
> realistic use-cases would never have more than a couple of layers of
> indirection. But this whole exercise is to guard against adversarial
> inputs, I think. I don't really want to add cycles and complexity to
> make our behavior a bit more friendly in cases that nobody is going
> to get into unless they are trying to break the database.
OK, that's fair enough. Here is the corrected patch.
```
=# SELECT perl_circular();
^CCancel request sent
ERROR: canceling statement due to user request
CONTEXT: PL/Perl function "perl_circular"
```
--
Best regards,
Aleksander Alekseev
