[Hibernate-issues] [Hibernate-JIRA] Created: (HHH-1837) discussion: implicit joins are always INNER

[Bill S. (JIRA) <no...@at...>]

discussion: implicit joins are always INNER
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         Key: HHH-1837
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1837
     Project: Hibernate3
        Type: Improvement

    Reporter: Bill Schneider


It would be helpful to explain the consequences in the docs re. implicit joins always resulting in INNER joins.  
This causes semantics of HQL expressions to be quite different from similar-looking JSTL expressions.  

in particular consider (copied from comment on HHH-989) this HQL expression
"cat.mate.name= ? OR cat.name=?"

if cat.mate is null, this will not return any results, **even if**  the right hand cat.name=? expression matches.
A similar condition in JSTL (<c:if test="${cat.mate.name = ... || cat.name = ...}">) would behave differently.
The HQL behavior may be correct, but sure could be confusing at first.


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