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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