Re: multi-key index
От | Bruce Momjian |
---|---|
Тема | Re: multi-key index |
Дата | |
Msg-id | 200412201803.iBKI35J03818@candle.pha.pa.us обсуждение исходный текст |
Ответ на | multi-key index (Jaime Casanova <systemguards@yahoo.com>) |
Список | pgsql-hackers |
Jaime Casanova wrote: > Hi everyone, > > >From the TODO items: > Use index to restrict rows returned by multi-key index > when used with non-consecutive keys to reduce heap > accesses. > For an index on col1,col2,col3, and a WHERE clause of > col1 = 5 and col3 = 9, spin though the index checking > for col1 and col3 matches, rather than just col1; also > called skip-scanning. > > > I was looking in the archives something about this but > i found nothing. Where can i found the thread (i > suppose should be one) about this issue? I don't remember any detailed discussion on it except that it would be a good idea. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania19073
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