Hello

I begin in hibernate and try some exemple :
here is the java code I use to record an object :

SessionFactory sessionFactory = new
Configuration().configure().buildSessionFactory();
Session session =sessionFactory.openSession();
// org.hibernate.Transaction tx = session.beginTransaction();
Users user = new Users();
user.setLogin("marcel");
user.setPassword("toto");
session.saveOrUpdate(user);
//tx.commit();
session.flush();
session.close();

the point is the if I don't use transaction commands (here commented) the insert request is executed in DB (HSQLDB) and there is a rollback just after so nothing is donne.

If I uncomment the Transaction commands it works perfectly.

Where do come from this rollback ?