In EJB QL, is it possible to do a LEFT JOIN on two entities that have no declared relationship, thus simulating the ON clause in the sql equivalent??

From the EJB 3.0 book, they give the example of finding all customers and their phone numbers - whether or not they have them:

SELECT c.firstName, c.lastName, p.number FROM Customer c LEFT JOIN c.phoneNumbers p

That works because there is a declared relationship between Customer and Phone. What if I didn't have that relationship and wanted to do something more like this:

SELECT c.firstName, c.lastName, p.number FROM Customer c LEFT JOIN Phone p WHERE c.someId=p.someId

Is that even possible?

Thanks in advance!

Justin