On Mon, Jan 11, 2010 at 11:08 AM, Vincenzo Romano > SELECT * FROM master_tab > WHERE col1>='a date':timestamp AND col1<'another date'::timestamp > AND col2=42 AND col3='the answer'; queries of this sort are optimally handled via row constructor for 8.2 onwards: create index col231_idx on master_tab(col2, col3, col1); select * from master_tab where (col2,col3,co1) >= (42, 'the answer', a_date) and (col2,col3,co1) < (42, 'the answer', b_date); one caveat: the planner is lousy in regards to estimating index selectivity in these cases which can cause strange behaviors. regarding constraint_exclusion, I don't think there are any issues...you should test it to be sure. merlin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
