| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Neil Conway <neilc(at)samurai(dot)com> |
| Cc: | pgsql-patches <pgsql-patches(at)postgresql(dot)org> |
| Subject: | Re: TupleDesc refcounting |
| Date: | 2006-01-12 15:40:43 |
| Message-ID: | 5148.1137080443@sss.pgh.pa.us |
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| Lists: | pgsql-patches |
Neil Conway <neilc(at)samurai(dot)com> writes:
> Ah, I see what you mean. In implementing this, I wasn't sure the best
> way to provide these two sorts of TupleDesc references. My first thought
> was to add a "use ResourceOwner?" boolean parameter to the routines that
> create and destroy references to TupleDescs:
No, I wouldn't do that. I would keep the routines you mention ignorant
of ResourceOwner, because I think that the vast majority of tupdesc
usage will NOT be using ResourceOwners. Only the places where a pointer
to a cached tupdesc is handed out need to deal with this. This excludes
practically all of the executor, for instance.
If you're finding yourself writing a large and invasive patch, I think
you're doing it wrong. I'm envisioning something pretty localized.
regards, tom lane
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