setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); /** $dbh->query('TRUNCATE TABLE user'); $dbh->query('TRUNCATE TABLE club'); $dbh->query('TRUNCATE TABLE clubuser'); */ $dbh->query('DROP TABLE IF EXISTS clubuser CASCADE'); $dbh->query('DROP TABLE IF EXISTS club'); $dbh->query('DROP TABLE IF EXISTS user'); $dbh->query('DROP TRIGGER IF EXISTS trg1'); $dbh->query('DROP TRIGGER IF EXISTS trg2'); $dbh->query('CREATE TABLE IF NOT EXISTS user (id INT, parent_id INT, name VARCHAR(200), PRIMARY KEY(id), INDEX (id))'); $dbh->query('CREATE TABLE IF NOT EXISTS club (id INT, name VARCHAR(200), PRIMARY KEY(id), INDEX (id))'); $dbh->query('CREATE TABLE IF NOT EXISTS clubuser (user_id INT, club_id INT, INDEX (user_id), INDEX (club_id), PRIMARY KEY(user_id, club_id))'); $dbh->query('ALTER TABLE clubuser ADD FOREIGN KEY (user_id) REFERENCES user(id) ON DELETE CASCADE'); $dbh->query('ALTER TABLE clubuser ADD FOREIGN KEY (club_id) REFERENCES club(id) ON DELETE CASCADE'); $dbh->query('ALTER TABLE user ADD FOREIGN KEY (parent_id) REFERENCES user(id) ON DELETE CASCADE'); /** $dbh->query('CREATE TRIGGER trg5 AFTER DELETE ON user FOR EACH ROW BEGIN DELETE FROM user WHERE user.parent_id = OLD.id; END;'); $dbh->query('CREATE TRIGGER trg2 BEFORE DELETE ON user FOR EACH ROW BEGIN DELETE FROM clubuser WHERE clubuser.user_id = OLD.id; END;'); */ /** $dbh->query('CREATE TRIGGER trg1 BEFORE DELETE ON club FOR EACH ROW BEGIN @param := SELECT user_id FROM clubuser WHERE clubuser.club_id = OLD.id; DELETE FROM clubuser WHERE clubuser.user_id = OLD.id; DELETE FROM clubuser WHERE clubuser.club_id = OLD.id; END;'); IN (SELECT user_id FROM clubuser WHERE clubuser.club_id = OLD.id); $dbh->query('CREATE TRIGGER trg3 AFTER DELETE ON clubuser FOR EACH ROW BEGIN UPDATE user SET user.name = "deleted" WHERE user.id = OLD.user_id; END;'); $dbh->query('CREATE TRIGGER trg4 AFTER UPDATE ON user FOR EACH ROW BEGIN DELETE FROM clubuser WHERE clubuser.user_id = NEW.id; DELETE FROM user WHERE user.name = "deleted"; END;'); */ $dbh->query('INSERT INTO user (id, parent_id) VALUES (1, 1)'); $dbh->query('INSERT INTO user (id, parent_id) VALUES (2, 1)'); $dbh->query('INSERT INTO user (id, parent_id) VALUES (3, 1)'); $dbh->query('INSERT INTO user (id, parent_id) VALUES (4, 3)'); $dbh->query('INSERT INTO user (id, parent_id) VALUES (5, 2)'); $dbh->query('INSERT INTO user (id, parent_id) VALUES (6, NULL)'); $dbh->query('INSERT INTO user (id, parent_id) VALUES (7, 6)'); $dbh->query('INSERT INTO user (id, parent_id) VALUES (8, 6)'); $dbh->query('INSERT INTO club (id) VALUES (1)'); $dbh->query('INSERT INTO club (id) VALUES (2)'); $dbh->query('INSERT INTO club (id) VALUES (3)'); $dbh->query('INSERT INTO club (id) VALUES (4)'); $dbh->query('INSERT INTO clubuser (user_id, club_id) VALUES (1, 1)'); $dbh->query('INSERT INTO clubuser (user_id, club_id) VALUES (2, 1)'); $dbh->query('INSERT INTO clubuser (user_id, club_id) VALUES (2, 2)'); print "
"; //$dbh->query('DELETE FROM club WHERE id = 1'); $dbh->query('DELETE FROM user WHERE id = 1'); // should have deleted the first two users var_dump($dbh->query('SELECT * FROM user')->fetchAll()); ?>