| /*Region History*/ |
| CREATE TABLE IF NOT EXISTS REGION_HIST (HIST_ID serial, operation char(1), stamp timestamp, LIKE REGION EXCLUDING ALL); |
| -- |
| -- Create a row in {0}.region_hist_audit to reflect the operation performed on region, |
| -- making use of the special variable TG_OP to work out the operation. |
| -- |
| CREATE OR REPLACE FUNCTION process_region_audit() RETURNS TRIGGER AS $object_audit$ BEGIN IF (TG_OP = 'DELETE') THEN INSERT INTO {0}.region_hist SELECT nextval('region_hist_hist_id_seq'), 'D', now(), OLD.*; ELSIF (TG_OP = 'UPDATE') THEN INSERT INTO {0}.region_hist SELECT nextval('region_hist_hist_id_seq'), 'U', now(), NEW.*; ELSIF (TG_OP = 'INSERT') THEN INSERT INTO {0}.region_hist SELECT nextval('region_hist_hist_id_seq'), 'I', now(), NEW.*; END IF; RETURN NULL; END; $object_audit$ LANGUAGE plpgsql; |
| DROP TRIGGER IF EXISTS region_audit on {0}.region; |
| CREATE TRIGGER region_audit AFTER INSERT OR UPDATE OR DELETE ON {0}.region FOR EACH ROW EXECUTE PROCEDURE process_region_audit(); |
