1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
-- Login event triggers
CREATE TABLE user_logins(id serial, who text);
GRANT SELECT ON user_logins TO public;
CREATE FUNCTION on_login_proc() RETURNS event_trigger AS $$
BEGIN
INSERT INTO user_logins (who) VALUES (SESSION_USER);
RAISE NOTICE 'You are welcome!';
END;
$$ LANGUAGE plpgsql;
CREATE EVENT TRIGGER on_login_trigger ON login EXECUTE PROCEDURE on_login_proc();
ALTER EVENT TRIGGER on_login_trigger ENABLE ALWAYS;
\c
SELECT COUNT(*) FROM user_logins;
\c
SELECT COUNT(*) FROM user_logins;
-- Check dathasloginevt in system catalog
SELECT dathasloginevt FROM pg_database WHERE datname= :'DBNAME';
-- Cleanup
DROP TABLE user_logins;
DROP EVENT TRIGGER on_login_trigger;
DROP FUNCTION on_login_proc();
\c
|
