Richard Broersma <richard.broersma@xxxxxxxxx> writes: > On Wed, Feb 25, 2009 at 5:21 AM, Gregory Stark <stark@xxxxxxxxxxxxxxxx> 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 Those statements are all still true, but notice that nowhere do they suggest doing anything except simple equality comparisons on XIDs. The OP was looking for ordering, which is a lot trickier, especially if you might be dealing with old (frozen) tuples. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
