Take a look here: docs.jboss.org/.../batch.html#batch-direct
Scroll down directly to the "13.4. DML-style operations" section.

Hope this helps :)

The original authors of Hibernate actually have a famous book out called "Hibernate in Action" for which I think a 2nd edition came out recently. I dont recall if the book specifically references HQL but that might also be a good resource for you. Check it out...