Laurent Martelli <[EMAIL PROTECTED]> writes:

>   PFC>        SELECT owner from pictures group by owner;
> 
> That's a slight improvement, but there's still a seq scan on pictures:

It should be a sequential scan. An index will be slower.

>  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

That's the best plan for this query.

-- 
greg


---------------------------(end of broadcast)---------------------------
TIP 2: you can get off all lists at once with the unregister command
    (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])

Reply via email to