Hi

I've a one-to-many relationship Order and the OrderItems contained in
the Order. The Order class contains a Set with OrderItems.

When I update the Order I want to dereference OrderItems which has
been removed. An extract of the configuration file is shown below.

<set name="orderItems"
inverse="true"
cascade="all-delete-orphan">
<key column="ORDERS_ID"/>
<one-to-many class="model.OrderItem"/>
</set>

When I in code try to make the Set empty the OrderItems are still left.
My code is like this

Session session = HibernateUtil.getSession();
Transaction tx = session.beginTransaction();
order.setOrderItems(new HashSet());
session.update(order);
tx.commit();
HibernateUtil.closeSession();

But the OrderItems are still left in the database. How am I to do to
get the dereferenced OrderItems removed?