Re: Increasing select max(datecol) from bilkaib where datecol<=date'2008-11-01' and (cr='00' or db='00') speed

Vladimir,

>I am afraid PostgreSQL is not smart enough to rewrite query with "or" into
>two separate index scans. There is no way to improve the query
>significantly without rewriting it.
>Note:  for this case indices on (datecol), (cr) and (db) are not very
>helpful.

Thank you very much.
I added you indexes to db and re-write query.
Now it runs fast.

Andrus.