irclogbot=# explain select * from messages where created_at < '3-16-2007';
                                 QUERY PLAN                                  
-----------------------------------------------------------------------------
 Seq Scan on messages  (cost=0.00..65981.94 rows=1435549 width=205)
   Filter: (created_at < '2007-03-16 00:00:00'::timestamp without time zone)
(2 rows)