From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Leon <leon(at)udmnet(dot)ru> |
Cc: | "'pgsql-general(at)hub(dot)org'" <pgsql-general(at)hub(dot)org> |
Subject: | Re: [GENERAL] Fast join |
Date: | 1999-06-29 16:01:57 |
Message-ID: | 199906291601.MAA04834@candle.pha.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
> Oh, I'm sorry, it was a typo. But believe me, such behaviour is
> persistent notwithstanding any type of qualification. It is, so
> to say, tested and approved. Look at the explanations of Postgres
> of his plan of query on database whose creation I showed you
> earlier (it has two tables of 10000 rows, properly vacuumed):
>
> -=--------------------------------
> adb=> EXPLAIN SELECT COUNT(*) FROM atable WHERE atable.cfield = btable.cfield
> AND atable.afield<10;
> NOTICE: QUERY PLAN:
But your only restriction is < 10. That is not enough. Make it = 10,
and I think it will use the index.
--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
From | Date | Subject | |
---|---|---|---|
Next Message | Leon | 1999-06-29 16:37:36 | Re: [GENERAL] Fast join |
Previous Message | Herouth Maoz | 1999-06-29 15:53:05 | Re: [GENERAL] Fast join |