From: | Josh Berkus <josh(at)agliodbs(dot)com> |
---|---|
To: | pgsql-performance(at)postgresql(dot)org |
Cc: | tomas(at)nocrew(dot)org (Tomas =?iso-8859-1?q?Sk=E4re?=) |
Subject: | Re: Query is not using index when it should |
Date: | 2004-12-13 02:48:27 |
Message-ID: | 200412121848.27513.josh@agliodbs.com |
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Lists: | pgsql-general pgsql-performance pgsql-sql |
Tomas,
> I tried to subscribe to pgsql-performance, but there seems to be
> something wrong with the majordomo, so I'm sending to general too,
> where I'm already subscribed.
Well, I got your e-mail, so obviously you're subscribed to Performance.
> But when doing a search with objectid, class and field, it doesn't use
> the idx_cjm_object1 index.
> db=# explain analyze select * from cjm_object where objectid=4534 and
> class=12 and field='paroid'; QUERY PLAN
Try:
explain analyze select * from cjm_object where objectid=4534::BIGINT and
class=12 and field='paroid';
Sometimes the planner needs a little extra help on BIGINT fields. This
problem is fixed in 8.0.
--
Josh Berkus
Aglio Database Solutions
San Francisco
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