Stephan Szabo wrote:
>On Wed, 20 Aug 2003, Rod Taylor wrote:
>...
>
>
>>Is the temp table version any faster? I realize it has a higher limit
>>to the number of items you can have in the list.
>>
>>
>
>Within the scope of the new hashed IN stuff I believe so in at least some
>cases. I have a few million row table of integers where searching for
>values IN (~10000 values) takes longer than creating the temp table,
>copying into it and doing the in subquery. That's not a particularly
>meaningful test case, but sending the psql output to /dev/null gives me: ...
>
But where do your values come from in the first place?
Couldn't you optimize your model so that you don't have to copy around
such amounts of data?
Regards,
Dani
