"andremachado" <andremachado@techforce.com.br> writes:
> Firebird has something similiar to EXPLAIN. Please look below.
Hm, maybe I just don't know how to read their output, but it's not
obvious to me where they are doing the min/max aggregates.
> Is there something really wrong with the postgresql configuration (at my
> previous msg) that is causing this poor performance at these 2 queries?
I don't think it's a configuration issue, it's a quality-of-plan issue.
Could you put together a self-contained test case for this problem? I
don't have the time or interest to try to reverse-engineer tables and
test data for these queries --- but I would be interested in finding out
where the time is going, if I could run the queries.
regards, tom lane