Re: mvcc catalo gsnapshots and TopTransactionContext

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Andres Freund <andres(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Noah Misch <noah(at)leadboat(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: mvcc catalo gsnapshots and TopTransactionContext
Date: 2013-10-07 19:02:36
Message-ID: CA+Tgmoam4Exh2KLbqRyR8ijeRBqnQApXo7KQSaTEwpwgb45b5w@mail.gmail.com
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On Fri, Oct 4, 2013 at 3:20 PM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> On 2013-10-04 15:15:36 -0400, Robert Haas wrote:
>> Andres, are you (or is anyone) going to try to fix this assertion failure?
>
> I think short term replacing it by IsTransactionOrTransactionBlock() is
> the way to go. Entirely restructuring how cache invalidation in the
> abort path works is not a small task.

Well, if we're going to go that route, how about something like the
attached? I included the assert-change per se, an explanatory
comment, and the test case that Noah devised to cause the current
assertion to fail.

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

Attachment Content-Type Size
weaken-searchcatcache-assert.patch application/octet-stream 2.0 KB

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