PGSQL PERFORMANCE 7 RE QUERY IS NOT USING INDEX WHEN IT SHOULD
From: josh@no-spam (Josh Berkus)
Subject: Re: Query is not using index when it should
Date: Sun, 12 Dec 2004 18:48:27 -0800


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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