Re: temp tables should not have pg_shdepend entries

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
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 17:42:02
Message-ID: 3603.1207676522@sss.pgh.pa.us
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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.

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.

regards, tom lane

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