| From: | Tim Bunce <Tim(dot)Bunce(at)pobox(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, David Fetter <david(at)fetter(dot)org>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Tim Bunce <Tim(dot)Bunce(at)pobox(dot)com>, pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #5066: plperl issues with perl_destruct() and END blocks |
| Date: | 2009-09-28 20:23:01 |
| Message-ID: | 20090928202301.GF41016@timac.local |
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| Lists: | pgsql-bugs |
On Tue, Sep 22, 2009 at 10:13:24AM -0400, Tom Lane wrote:
>
> Another point that comes to mind is shared_preload_libraries: if plperl
> is loaded once in the postmaster, it seems entirely likely that the same
> END block would be executed in multiple backends after having been
> loaded only once. Again, while that might be okay for his particular
> use-case, it seems horribly dangerous for anything else.
I agree with Robert that that would be expected behaviour for perl
users - but it would only apply for cases where END blocks had been
compiled by the postmaster.
> (The shared_preload_libraries case also destroys the most obvious
> implementation path, ie having plperl add an on_proc_exit callback
> at _PG_init time...)
Could you explain the problem? (I don't see it, but I'm not familar with
postgres internals.)
Tim.
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