| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Jim Richards <grumpy(at)cyber4(dot)org> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: full-text indexing |
| Date: | 2000-04-19 02:19:38 |
| Message-ID: | 200004190219.WAA18558@candle.pha.pa.us |
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| Lists: | pgsql-general |
> At 08:40 PM 18/04/00 -0400, Bruce Momjian wrote:
>
> >I have one word for you: CLUSTER. Without it, index lookups are too
> >slow. With it, they are rapid. I have done some work like this
> >commerically with Ingres, which has an ISAM type that keeps the matching
> >rows pretty close on a newly-created ISAM index. In PostgreSQL, and
> >regular CLUSTER will keep you good.
>
> The only down side of CLUSTER is that you loose your other keys on the
> table, including a primary key, so you loose out on your intregrity checks,
> which you the have to explictily re-apply with CREATE UNQIUE INDEX ...
>
Yes, you basically have to recreate them after CLUSTER.
--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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