Can I do raw DML with Hibernate?

Hibernate's JDBC Connection is available by calling Session.connection(). Once you have the connection you can run any sql you wish.

Can any DML made on such a connection be made transactional with
the rest of hibernate calls.

tx = session.beginTransaction();
session.save(object);
session.getConnection.execute("update .....some dml");
tx.commit();

If you use the JDBC connection directly it will bypass the Session of Hibernate, if you just want to run an SQL Statement you can create an SQLQuery object form the Session and still use the Session and Transaction demarcation.

Mark