Re: Query w empty result set with LIMIT orders of magnitude slower than without - Mailing list pgsql-performance

On Tue, Aug 26, 2008 at 5:53 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> "Frank Joerdens" <frank@joerdens.de> writes:
>> It seems to me that the planner makes a very poor decision with this
>> particular query:
>
> Try increasing the stats on woouser.  You need it to make a smaller
> estimate of the number of matching rows here:

Way cool, this

alter table webapp_invite alter column woouser set statistics 50;

did the trick, without cleaning up the spurious join there even.

Thanks!

Frank