Java: JPQL select statement

Posted by bguiz on Stack Overflow See other posts from Stack Overflow or by bguiz
Published on 2010-05-24T23:12:34Z Indexed on 2010/05/24 23:21 UTC
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java

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select

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jpql

select x from X x where x.a.id = :a_id --> Always 0 objects selected

Why does the above JPQL statement not work, but the one below work?

select a from A a where a.id = :a_id --> a_obj
select x from X x where x.a = :a_obj --> Always correct number of objects selected

Neither query throws an exception during execution, but a different number of results are obtained.

Thanks

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