Does PG (8.1) ever use existing indexes when executing an UPDATE?
I've got some tables with millions of records and whenever I update a column that involves most or all the records the EXPLAIN command seems to indicate that it isn't using the pre-existing indexes. This result in a slow update, which is further slowed by the presence of indexes. So when doing a large update should I just drop the indexes first, or is there some good reason to keep them?
Thanks, - Bill Thoen -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
