Re: Have I b0rked something? Slow comparisons on "where x in (...)"

Stephen Harris wrote:
> On Wed, May 02, 2007 at 12:45:08PM -0700, Dann Corbit wrote:
>> Have you done a vacuum on the table recently?
>
> We vacuum daily and cluster weekly after the nightly activities have been
> performed.
>
>> IN list, then the IN list might benefit from a bit of analysis for
>
> The IN list is just a set of integers (it's an integer index) generated
> from some selects on other tables earlier in our processing.  I don't
> have any choice as to what is in the IN list :-)

Try creating a temporary table, populating with the list and joining
against it. That's probably your best bet for a long list of target values.

--
   Richard Huxton
   Archonet Ltd