From: | Marc Boucher <pgml(at)gmx(dot)net> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: index and queries using '<' '>' |
Date: | 2004-11-19 13:45:04 |
Message-ID: | 3.0.5.32.20041119144504.008d3eb0@prx.mad.com |
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Lists: | pgsql-general |
At 16:23 18/11/2004 +0100, Martijn van Oosterhout wrote:
> The system seems to think that a scan is cheap because the table is so
> small.
The table currently contains just over 10000 elements. So 238 rows is a
small part of it.
> Have you ever ANALYZEd that table?
Yes. That and reindex (in case of a problem).
I have also tried ALTER TABLE ALTER COLUMN SET STATISTICS, but without
improvement.
> Also, EXPLAIN ANALYZE gives a much better idea of what is going on...
You mean ANALYZE VERBOSE ?
Since the table is still growing, and the amount of rows in the reply of
the query is quite uniform (it's not dependant on the size of the table), I
hope that the statistics will evolve in a state that will force the use of
the index.
thanks
--
Marc
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