You cannot ALWAYS do an indexed scan - sometimes the only option for the parser is to do a sequential scan (thus you can say "avoid unless you have to" but you can never truly disable sequential scanning). Given limited knowledge of full-text searching I cannot explain why this specific query is unable (or unwilling) to use an index. Since you have not provided any index options for the list to consider we may even assume you have NO indexes and thus none to choose from... I'd suggest looking at chapters 11 (Indexes) and 12 (Full-Text) of the documentation while awaiting further responses from the list (after you describe what indexes you have already defined on relevant tables - and maybe provide the raw query as well). David J -----Original Message----- From: pgsql-general-owner@xxxxxxxxxxxxxx [mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of Ahmed Ossama Sent: Monday, February 14, 2011 12:40 PM To: pgsql-general@xxxxxxxxxxxxxx Subject: Using Bitmap scan instead of Seq scan I did a REINDEX and ANALYZE on the table, disabled the seqscan and ran the query again with the same result. My question how do I make PostgreSQL always uses bitmap scan instead of seq scan? Any advice is very much appreciated. Best Regards, Ahmed Ossama -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
