From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
Cc: | Steve Crawford <scrawford(at)pinpointresearch(dot)com>, pgsql-general(at)postgresql(dot)org |
Subject: | Re: clustering by partial indexes |
Date: | 2005-11-16 01:41:06 |
Message-ID: | 200511160141.jAG1f6n25063@candle.pha.pa.us |
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Lists: | pgsql-general |
Jim C. Nasby wrote:
> On Tue, Nov 15, 2005 at 10:18:26AM -0800, Steve Crawford wrote:
> > Not trivial? Seems to me more like impossible to implement for the
> > general case which would require you to resolve the situation where
> > someone requests multiple, overlapping, clustered partial indexes
> > where the ordering requirements are in conflict.
>
> Well, currently you can only cluster on a single index per table, and I
> really doubt that will change. In any case, if someone's going to work
> on clustered indexes I think it would be much more worthwhile to make
> them self-maintaining (or at least more self-maintaining).
Wow, imagine if we could cluster by partial indexes, and then imagine we
could allow multiple clustering per table if the partial indexes did not
overlap --- that is a massive project.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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