I am implementing table partition. -- There is reason behind why we do not want to use trigger technique for table unit. -- Please refer to : http://archives.postgresql.org/pgsql-general/2010-01/msg01184.php -- INSERT INTO unit(fk_lot_id, cycle) -- VALUES(_lotID, _cycle) RETURNING unit_id INTO _unit_id; unit_table_index = _lotID; unit_table_name = 'unit_' || _lotID; IF NOT EXISTS(SELECT * FROM information_schema.tables WHERE table_name = unit_table_name) THEN EXECUTE 'CREATE TABLE ' || quote_ident(unit_table_name) || ' ( unit_id bigserial NOT NULL, fk_lot_id bigint NOT NULL, CHECK (fk_lot_id = ' || (unit_table_index) || '), CONSTRAINT pk_unit_' || unit_table_index || '_id PRIMARY KEY (unit_id), CONSTRAINT fk_lot_' || unit_table_index || '_id FOREIGN KEY (fk_lot_id) REFERENCES lot (lot_id) MATCH SIMPLE ON UPDATE NO ACTION ON DELETE CASCADE ) INHERITS (unit);'; EXECUTE 'CREATE INDEX fk_lot_' || unit_table_index || '_id_idx ON ' || quote_ident(unit_table_name) || '(fk_lot_id);'; END IF; EXECUTE 'INSERT INTO ' || quote_ident(unit_table_name) || '(fk_lot_id, cycle) VALUES (' || _lotID || ',' || _cycle || ') RETURNING unit_id' INTO _unit_id; _unit.unit_id = _unit_id; _unit.fk_lot_id = _lotID; _unit.cycle = _cycle; However, I always get the following message, when there is a new table need to be created. NOTICE: CREATE TABLE will create implicit sequence "unit_2_unit_id_seq" for serial column "unit_2.unit_id" CONTEXT: SQL statement "CREATE TABLE unit_2 ( unit_id bigserial NOT NULL, fk_lot_id bigint NOT NULL, CHECK (fk_lot_id = 2), CONSTRAINT pk_unit_2_id PRIMARY KEY (unit_id), CONSTRAINT fk_lot_2_id FOREIGN KEY (fk_lot_id) REFERENCES lot (lot_id) MATCH SIMPLE ON UPDATE NO ACTION ON DELETE CAS CADE ) INHERITS (unit);" PL/pgSQL function "insert_unit" line 29 at EXECUTE statement NOTICE: merging column "unit_id" with inherited definition Is this the warning message I should take any action on it? If not, how I can suppress it? It is quite annoying, when I saw these message keep printing out from my c++ console. Thanks and Regards Yan Cheng CHEOK -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general