Re: XID Data Types

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Jan Wieck <JanWieck(at)Yahoo(dot)com>
Cc: Manfred Koizar <mkoi-pg(at)aon(dot)at>, Ericson Smith <eric(at)did-it(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: XID Data Types
Date: 2004-05-06 15:08:56
Message-ID: 200405061508.i46F8u521383@candle.pha.pa.us
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Jan Wieck wrote:
> Manfred Koizar wrote:
> > On Mon, 03 May 2004 13:38:45 -0400, Ericson Smith <eric(at)did-it(dot)com>
> > wrote:
> >>didit=# select *,xmin from settings where xmin > '187167023'::xid limit 5;
> >>ERROR: operator does not exist: xid > xid
> >
> > There might be better solutions, but when I ran into the same problem,
> > the age(xid) function helped at lot.
>
> Slony contains an xxid data type that follows exactly the xid semantics.
> It comes with a full operator class so that you can even put indexes on
> xxid type columns. Shouldn't be too hard to define those operators for
> the builtin xid type instead.

Should we just get that into our CVS so Slony doesn't have to distribute
its own?

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