I'm now in charged of the following code and I 'm not sure if I correctly understand what the guy was doing ..
void methodA(){
sess=SessionFactory.openSession();
tx=sess.beginTransaction(),;

myobj1 = sess.get(MyObj1.class , anInt),
myobj2 = myobj1.cloneDeep();
sess.save(myobj2) ;

myobj1.setAttrib1(newvalue);
myobj1.setAttrib2(newvalue);

tx.commit();
sess.close();
}

myobj1 and 2 are local vars not instVar. What happens here ??

I understand that myobj2 will be newly saved and thus gets a new id in the table (a new row in the table) but what happens with myobj1 does the commit flush the in-memory cache and also save myobj1 thus actually executing an update on the DB of myobj1 ?? Or will the newly assigned values to myobj1 be discarded when method end since myobj1 is locally declared ??

thanks for your help
nitro

myobj1 is still loaded in the persistent context when you set Attrib1 and Attrib2 (it doesn't matter if the myobj1 is declared local or something else), so this changes are tracked and propagated to the database when you flush or commit (unless you deactivated auto-flush on commit).

many thanks pb00067 the missing element for me was this auto-flush on the commit. I will check that. thanks ..