| From: | Mike Winter <mike(dot)winter(at)frontlogic(dot)com> |
|---|---|
| To: | <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: "SELECT IN" Still Broken in 7.4b |
| Date: | 2003-08-20 18:51:13 |
| Message-ID: | Pine.LNX.4.33L2.0308201247550.6023-100000@frontlogic.com |
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| Lists: | pgsql-sql |
On Wed, 20 Aug 2003, Rod Taylor wrote:
> Ensure your IN list is unique. You might find better times by through
> an indexed temp table.
That is what I ended up doing, but it's not a very elegant solution.
MySQL does queries of this type orders of magnitudes faster than Postgres
on large value lists, although I have no specific algorithmic solutions to
offer for how to make it faster. I don't believe making the IN lists
unique has any affect on performance.
--
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