On 2011-02-08 01:14, Sylvain Rabot wrote:
CREATE INDEX directory_id_user_mod_cons_hash_0_btree_idx ON mike.directory USING btree (id_user) WHERE __mod_cons_hash(id_user, 4) = 0; CREATE INDEX directory_id_user_mod_cons_hash_1_btree_idx ON mike.directory USING btree (id_user) WHERE __mod_cons_hash(id_user, 4) = 1; CREATE INDEX directory_id_user_mod_cons_hash_2_btree_idx ON mike.directory USING btree (id_user) WHERE __mod_cons_hash(id_user, 4) = 2; CREATE INDEX directory_id_user_mod_cons_hash_3_btree_idx ON mike.directory USING btree (id_user) WHERE __mod_cons_hash(id_user, 4) = 3;
mike=# EXPLAIN ANALYZE SELECT * FROM directory WHERE id_user = 4;
Should be written as: select * from directory where __mod_cons_hash(id_user,4) = 4%4; Then it should just work. -- Jesper -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
