[hibernate-dev] enhancement request - relaxing theta-style joins

[Joseph Marques]

 From Java Persistence with Hibernate:

    "You probably won't need to use the theta-style joins often.  Note
    that it's currently not possible in HQL or JPA QL to outer join two
    tables that don't have a mapped association -- theta-style joins are
    inner joins."

When dealing with larger domain models (say, anything more than 100 
entities) the number of permutations concerning how you could 
potentially want to correlate data in the system grows rapidly.  
However, the theta-style restriction makes providing a flexible 
mechanism for reporting difficult.

I want to be judicious in my use of explicit relationship mappings, but 
this restriction seems to imply the exact opposite - that I'd have to 
use them freely in more places than I might have originally wanted to, 
and create an explicit mapping for everything that any reporting query 
might be correlated on.

Would it be possible to relax this restriction, and allow the 
theta-style query to join on things that aren't explicitly mapped?

-joe
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