Re: Question about explain of index scan

From: Hannu Krosing <hannu(at)skype(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Question about explain of index scan
Date: 2005-09-04 19:44:17
Message-ID: 1125863057.5610.39.camel@fuji.krosing.net
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On R, 2005-09-02 at 11:03 -0400, Tom Lane wrote:
> Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> writes:
> > I wonder why we don't support more operators on Xid, so these things are
> > avoided? Right now we only have =, AFAIR.
>
> I once started to make a btree opclass for XID, and stopped when it
> occurred to me that XID comparison doesn't obey the transitive law.
> btree won't like that...

Does this mean that Slony's usage of btree index on XID gives
(occasionally) wrong results ?

--
Hannu Krosing <hannu(at)skype(dot)net>

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