Re: clustering by partial indexes

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От Bruce Momjian
Тема Re: clustering by partial indexes
Дата
Msg-id 200511160141.jAG1f6n25063@candle.pha.pa.us
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Ответ на Re: clustering by partial indexes  ("Jim C. Nasby" <jnasby@pervasive.com>)
Ответы Re: clustering by partial indexes  (Martijn van Oosterhout <kleptog@svana.org>)
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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.

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