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jthg222
 Post subject: Using a subquery as a projection in a criteria
PostPosted: Mon Jun 09, 2008 12:12 pm 
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Joined: Wed May 28, 2008 1:42 pm
Posts: 2
This should be fairly simple but I haven't been able to find any examples for how to do this. Basically, I want to do the equivalent of the following in a Criteria and ResultTransformer it into a custom bean. Is a query like this supported by the Criteria API?

Code:
select p.name, (select sum(t.amount) from p.transactions t) from person p

I know that I could transform this into a join-and-group-by query, but the subselect version is significantly faster.
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dhay
 Post subject:
PostPosted: Mon Jun 09, 2008 4:50 pm 
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Joined: Fri Jun 30, 2006 7:00 pm
Posts: 6
I don't believe that this is currently supported. Your best bet is to use Projections.sqlProjection() or implementing the Projection interface to support what you need.

David
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