This question is "lazy" in Gavin's terms because I did not search all the documentation, just checked it quickly :)

I have classes A and B.
A lives in TBL_A, B is in TBL_B.
B extends A and mapped using <joined-subclass>

As I see, when use I session.delete(objectB), this removes records from both tables.

The quesion is: my I control this behavior? I need to delete only "subclass" part of the class, leaving its "base" in the database.

It is a nonsense as B extends A, so B is A. Can't delete something wo deleting it

You might be better off with a one-to-one relationship. That way, you could have that optional portion exist or be null. You'd just have to access it like a component. If you delete the component, you still have the main 'object' in your main table.

Regards,
David

Good idea, David.
Thanks