Wow, what a fast response !!!
>>>>> "PFC" == PFC <lists(at)boutiquenumerique(dot)com> writes:
PFC> Try :
PFC> SELECT owner from pictures group by owner;
That's a slight improvement, but there's still a seq scan on pictures:
HashAggregate (cost=114.38..114.38 rows=21 width=4) (actual time=7.585..7.605 rows=21 loops=1)
-> Seq Scan on pictures (cost=0.00..103.70 rows=4270 width=4) (actual time=0.015..3.272 rows=4270 loops=1)
Total runtime: 7.719 ms
--
Laurent Martelli
laurent(at)aopsys(dot)com Java Aspect Components
http://www.aopsys.com/ http://jac.objectweb.org