| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Neil Conway <neilc(at)samurai(dot)com> |
| Cc: | Richard Sang <xhfdc(at)hotmail(dot)com>, pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: SQL explainer problem for 8.0.1? |
| Date: | 2005-02-22 00:49:13 |
| Message-ID: | 4064.1109033353@sss.pgh.pa.us |
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| Lists: | pgsql-bugs |
Neil Conway <neilc(at)samurai(dot)com> writes:
> Evidently the optimizer chooses a different plan in the presence of the
> WHERE clause, but that plan appears to be pretty bad. However, it is
> tough to say more without EXPLAIN output for both queries (if possible,
> get EXPLAIN ANALYZE output -- although this might take too long for the
> second query).
And the schemas for the tables involved --- without knowing what indexes
are available it's impossible to guess much.
> Also, have you run ANALYZE recently?
Indeed.
regards, tom lane
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