Re: temp tables should not have pg_shdepend entries

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: temp tables should not have pg_shdepend entries
Date: 2008-04-08 18:28:18
Message-ID: 20080408182818.GK9062@alvh.no-ip.org
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Tom Lane wrote:
> Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> > Tom Lane wrote:
> >> I agree with that, but I think your idea of not making the pg_shdepend
> >> entries is a pointless and possibly dangerous micro-optimization.
> >> How much actual speedup would it provide, anyway?
>
> > Speedup? Not sure -- I'm more worried about catalog bloat for people
> > who create lots of temp tables.
>
> They're going to have far more bloat in pg_class, pg_attribute, etc.

But these are not shared catalogs.

> A more useful thing to do to save catalog bloat would be to stop storing
> the 100%-predictable pg_attribute entries for system columns --- that'd
> save six or seven rows per table, not just one.

Agreed.

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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