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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Dmitry Dolgov <9erthalion6@gmail.com>
Cc: Aleksander Alekseev <a.alekseev@postgrespro.ru>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Pavel Stehule <pavel.stehule@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Cc: David Steele <david@pgmasters.net>
Subject: Re: [Patch] Temporary tables that do not bloat pg_catalog (a.k.a fast temp tables)
Date: Sun, 14 Aug 2016 21:04:57 -0400
Message-ID: <20319.1471223097@sss.pgh.pa.us> (raw)
In-Reply-To: <20160815005755.gswdyjfob7dzw4yp@alap3.anarazel.de>
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Andres Freund <andres@anarazel.de> writes:
> On 2016-08-07 14:46:06 -0400, Tom Lane wrote:
>> Robert Haas <robertmhaas@gmail.com> writes:
>>> I think the whole idea of a fast temporary table is that there are no
>>> catalog entries.  If there are no catalog entries, then dependencies
>>> are not visible.  If there ARE catalog entries, to what do they refer?
>>> Without a pg_class entry for the table, there's no table OID upon
>>> which to depend.

>> TBH, I think that the chances of such a design getting committed are
>> not distinguishable from zero.  Tables have to have OIDs; there is just
>> too much code that assumes that.  And I seriously doubt that it will
>> work (for any large value of "work") without catalog entries.

> That seems a bit too defeatist.

Huh?  I didn't say we shouldn't work on the problem --- I just think that
this particular approach isn't good.  Which you seemed to agree with.

			regards, tom lane


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  Cc: tgl@sss.pgh.pa.us, andres@anarazel.de, robertmhaas@gmail.com, 9erthalion6@gmail.com, a.alekseev@postgrespro.ru, tomas.vondra@2ndquadrant.com, pavel.stehule@gmail.com, david@pgmasters.net
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