Re: optimizer choosing the wrong index
Tom Lane <tgl@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Martin Below <machtin.below@googlemail.com>
Cc: pgsql-general@postgresql.org
Date: 2010-07-08T14:11:30Z
Lists: pgsql-general
Martin Below <machtin.below@googlemail.com> writes: > test=# select count(*) total, count(distinct client_id) ids, > count(distinct expires_on) dates from ps; > total | ids | dates > --------+--------+-------- > 213645 | 123366 | 213549 That says the expires_on column is practically unique, which makes me think the planner is indeed making the right choice. regards, tom lane