| From: | Leigh Dyer <lsd(at)linuxgamers(dot)net> |
|---|---|
| To: | Postgres-performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Help speeding up delete |
| Date: | 2005-11-15 01:18:48 |
| Message-ID: | 43793778.7040006@linuxgamers.net |
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| Lists: | pgsql-performance pgsql-www |
Steve Wampler wrote:
>
> Is the performance behavior that we're experiencing a known
> problem with 7.2 that has been addressed in 7.4? Or will the
> upgrade fix other problems while leaving this one?
I'm pretty sure that in versions earlier than 7.4, IN clauses that use a
subquery will always use a seqscan, regardless of what indexes are
available. If you try an IN using explicit values though, it should use
the index.
Thanks
Leigh
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