Re: full-text indexing
От | Bruce Momjian |
---|---|
Тема | Re: full-text indexing |
Дата | |
Msg-id | 200004190219.WAA18558@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: full-text indexing (Jim Richards <grumpy@cyber4.org>) |
Список | 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@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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