[Hibernate-issues] [Hibernate-JIRA] Commented: (HHH-989) add discussion of implicit and explcit joins

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

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-989?page=comments#action_23324 ] 

Bill Schneider commented on HHH-989:
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It may also be helpful to add a note that implicit joins always appear to be inner joins.  in particular consider:

"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.

this is a little counter-intuitive looking at this from a Java beans/introspection perspective, because a similar condition in JSTL (<c:if test="${cat.mate.name = ... || cat.name = ...}">) would behave differently.


> add discussion of implicit and explcit joins
> --------------------------------------------
>
>          Key: HHH-989
>          URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-989
>      Project: Hibernate3
>         Type: Improvement

>   Components: documentation
>     Reporter: Steve Ebersole
>     Assignee: Steve Ebersole
>     Priority: Minor
>      Fix For: 3.1 rc 1

>
>
> Since we use the terms "implicit join" and "explicit join", we should at least have a discussion of the meaning of these in the hql reference doc.
> I was unable to find any mention of either...

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