gistfile1.txt

		Session session = openSession();
		session.beginTransaction();
		SoundSystem system = new SoundSystem();
		system.setId( "a" );
		system.setBrand( "brand1" );
		system.setModel( "model1" );
		session.persist( system );
		session.getTransaction().commit();
		session.close();

		session = openSession();
		session.beginTransaction();
		SoundSystem system1 = new SoundSystem();
		system1.setId( "a" );
		system1.setBrand( "brand2" );
		session.saveOrUpdate( system1 );
		session.getTransaction().commit();
		session.close();

-------------

14:59:09,749 DEBUG SQL:104 - 
    insert 
    into
        SoundSystem
        (brand, model, id) 
    values
        (?, ?, ?)
Hibernate: 
    insert 
    into
        SoundSystem
        (brand, model, id) 
    values
        (?, ?, ?)
14:59:09,828 TRACE BasicBinder:83 - binding parameter [1] as [VARCHAR] - brand1
14:59:09,829 TRACE BasicBinder:83 - binding parameter [2] as [VARCHAR] - model1
14:59:09,829 TRACE BasicBinder:83 - binding parameter [3] as [VARCHAR] - a
14:59:09,841 DEBUG SQL:104 - 
    select
        soundsyste_.id,
        soundsyste_.brand as brand10_,
        soundsyste_.model as model10_ 
    from
        SoundSystem soundsyste_ 
    where
        soundsyste_.id=?
Hibernate: 
    select
        soundsyste_.id,
        soundsyste_.brand as brand10_,
        soundsyste_.model as model10_ 
    from
        SoundSystem soundsyste_ 
    where
        soundsyste_.id=?
14:59:09,842 TRACE BasicBinder:83 - binding parameter [1] as [VARCHAR] - a
14:59:09,879 TRACE BasicExtractor:72 - Found [brand1] as column [brand10_]
14:59:09,880 TRACE BasicExtractor:72 - Found [model1] as column [model10_]
14:59:09,888 DEBUG SQL:104 - 
    update
        SoundSystem 
    set
        brand=?,
        model=? 
    where
        id=?
Hibernate: 
    update
        SoundSystem 
    set
        brand=?,
        model=? 
    where
        id=?
14:59:09,888 TRACE BasicBinder:83 - binding parameter [1] as [VARCHAR] - brand2
14:59:09,889 TRACE BasicBinder:71 - binding parameter [2] as [VARCHAR] - <null>
14:59:09,889 TRACE BasicBinder:83 - binding parameter [3] as [VARCHAR] - a