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Re: cannot read pg_class without having selected a database / is this a bug?

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Tomas Vondra <tv(at)fuzzy(dot)cz>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: cannot read pg_class without having selected a database / is this a bug?
Date: 2011-12-05 15:58:18
Message-ID: CA+TgmoYr-pJ64ZVms3BjF3gj-dLzRW4qfz9GyQu5dx3xPbA=GQ@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On Mon, Dec 5, 2011 at 10:46 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> I'm still puzzled that Tomas got it working at all.  If MyDatabaseId
>> hasn't been set yet, the how did we manage to build a relcache entry
>> for anything - let alone an unshared catalog?
>
> Well, he wasn't actually issuing a SQL query, just calling some of the
> pgstat.c subroutines that underlie the view.  It happens that the pgstat
> module has no backend-local initialization (at the moment, and
> discounting the issue of making the process's own pgstat_activity entry),
> so they were happy enough.  It was the syscache stuff that was spitting
> up.

Oh, I see.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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