Re: Using xmin to identify last modified rows

From: Richard Broersma <richard(dot)broersma(at)gmail(dot)com>
To: Gregory Stark <stark(at)enterprisedb(dot)com>
Cc: Stéphane A(dot) Schildknecht <stephane(dot)schildknecht(at)postgresqlfr(dot)org>, Postgres General <pgsql-general(at)postgresql(dot)org>
Subject: Re: Using xmin to identify last modified rows
Date: 2009-02-25 13:40:49
Message-ID: 396486430902250540g58da7123i19dcd7b620e21e6@mail.gmail.com
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On Wed, Feb 25, 2009 at 5:21 AM, Gregory Stark <stark(at)enterprisedb(dot)com> wrote:

> I'm not sure using xmin is such a great idea really. It's handy for ad-hoc
> queries but there are all kinds of cases where it might not give you the
> results you expect.

Its been a while since the following emails were written. Has the
treatment of xmin changed since then, or is using a timestamp a better
practice?

http://archives.postgresql.org/pgsql-novice/2007-02/msg00079.php
http://archives.postgresql.org/pgsql-hackers/2004-02/msg00654.php

--
Regards,
Richard Broersma Jr.

Visit the Los Angeles PostgreSQL Users Group (LAPUG)
http://pugs.postgresql.org/lapug

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