From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Andrew Hammond <andrew(dot)george(dot)hammond(at)gmail(dot)com> |
Subject: | Re: TOAST versus VACUUM, or "missing chunk number 0 for toast value" identified |
Date: | 2011-11-04 17:29:54 |
Message-ID: | 201111041729.pA4HTsU21893@momjian.us |
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Tom Lane wrote:
> Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> > Excerpts from Alvaro Herrera's message of vie oct 28 16:47:13 -0300 2011:
> >> BTW we had previous discussions about dropping pg_database's toast
> >> table. Maybe this is a good time to do it, even if there's no risk of
> >> this bug (or the hypothetical circularity detoasting problem) showing up
> >> there.
>
> No objection from me.
>
> > Oh, something unrelated I just remembered: we have
> > pg_database.datlastsysoid which seems unused. Perhaps we should remove
> > that column for cleanliness.
>
> I have a vague recollection that some client-side code uses this to
> figure out what's the dividing line between user and system OIDs.
> pg_dump used to need to know that number, and it can still be useful
> with casts and other things that are hard to tell whether they're built-in.
> While in principle people could use FirstNormalObjectId instead, that
> could come back to bite us if we ever have to increase that constant
> in future releases. I'm inclined to leave this one alone.
Maybe add a C comment?
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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