On Thu, Sep 10, 2009 at 8:43 AM, Tom Lane <t...@sss.pgh.pa.us> wrote:
> bricklen <brick...@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. The indexes are mostly defined as single-column indexes, with the exception of the "statsdaily_unique_idx" one: statsdaily_id_pk PRIMARY KEY, btree (id) statsdaily_unique_idx UNIQUE, btree (date, idaf, idsite, ofid, idcreative, idoptimizer) statsdaily_date_idx btree (date) statsdaily_ofid_idx btree (ofid) statsdaily_ofid_sept2009_idx btree (ofid) WHERE date >= '2009-09-01'::date
