On Thu, Sep 10, 2009 at 12:56 PM, bricklen <bricklen@gmail.com> wrote: > On Thu, Sep 10, 2009 at 8:43 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote: >> >> bricklen <bricklen@gmail.com> writes: >> > Is there any other data I can provide to shed some light on this? >> >> The table and index definitions? >> >> The straight indexscan would probably win if the index column order >> were ofid, date instead of date, ofid. I can't tell if you have >> any other queries for which the existing column order is preferable, >> though. >> >> regards, tom lane > > > Changing the order of the WHERE predicates didn't help.
He's talking about the index definition, not the WHERE clause. The order of the WHERE clause is totally irrelevant.