Re: plperl - make $_TD global

Andrew Dunstan wrote:
> >>The attached tiny patch will fix the problem Greg Sabino Mullane had
> >>with a shared lexical $_TD, by making it a global and just pushing a
> >>local value in the trigger function.
> >>...
> >>I don't think a docs change is needed.
> >
> >Are you sure this doesn't cause any user-visible semantics change
> >(ie, something that might break someone's code)?
> >
> >
> >
> >
>
> I think it should be mentioned in the release notes.
>
> I would be fairly stretched to come up with an example that it breaks.
> Essentially it's a way around the sharing violation that Greg got from
> using $_TD in a nested subroutine. All we are doing is moving $_TD from
> the local namespace to the global namespace. It still gets a per
> trigger-call value (that's what the "local $_TD = $_[0];" does) and that
> will work correctly even under recursive calls, so I think it's fairly safe.
>
> Maybe it is worth putting somethng in the plperl Trigger docs about the
> nature of the beast. I will do that if you like.
>

Yes, I think something for docs would be good.

--
  Bruce Momjian   http://candle.pha.pa.us
  EnterpriseDB    http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +