Re: Review: Fix snapshot taking inconsistencies

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Marko Tiikkaja <marko(dot)tiikkaja(at)cs(dot)helsinki(dot)fi>
Cc: Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Steve Singer <ssinger_pg(at)sympatico(dot)ca>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Review: Fix snapshot taking inconsistencies
Date: 2011-02-24 00:31:21
Message-ID: 20218.1298507481@sss.pgh.pa.us
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Marko Tiikkaja <marko(dot)tiikkaja(at)cs(dot)helsinki(dot)fi> writes:
> On 2011-02-24 12:39 AM, Tom Lane wrote:
>> My recollection is that this was pretty tightly coupled to the wCTE
>> patch.

> It was, but isn't anymore. Now it's just a bugfix.

The connection is the question of where to do CommandCounterIncrement
between successive DML WITH operations in a single command. Right
offhand, I don't see any CommandCounterIncrement in the wCTE patch,
so I'm sort of wondering whether the case works at all...

regards, tom lane

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