[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5465) HQL left join fetch of an element collection following a left join fetch of a one-to-one relationship causes NullPointerException
Christian Beikov (JIRA)
noreply at atlassian.com
Tue May 15 13:16:09 EDT 2012
[ https://hibernate.onjira.com/browse/HHH-5465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=46673#comment-46673 ]
Christian Beikov commented on HHH-5465:
---------------------------------------
This also fails when the relationship between EntityA and EntityB is a ManyToOne-Relation!!!
This bug is really annoying, please include the fix in the next release!
> HQL left join fetch of an element collection following a left join fetch of a one-to-one relationship causes NullPointerException
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: HHH-5465
> URL: https://hibernate.onjira.com/browse/HHH-5465
> Project: Hibernate ORM
> Issue Type: Bug
> Components: query-hql
> Affects Versions: 3.5.4
> Environment: Hibernate 3.5.4, Postgresql 8.4, Java 6
> Reporter: Andrew Tolopko
> Assignee: Sharath Reddy
> Attachments: hibernate-left-fetch-join-element-collection.patched.zip, hibernate-left-fetch-join-element-collection.zip, log.patched.txt, log.txt
>
>
> HQL queries of the form
> "from EntityA a left join fetch a.entityB b left join fetch b.items"
> fail with a NullPointerExeption when EntityA and EntityB have a one-to-one (@OneToOne) relationship and EntityB.items is an element collection (@ElementCollection, aka collection of values).
> For comparison, the following HQL queries are all admissible (which intends to demonstrate that no particular clause of the the above HQL is incorrect):
> "from EntityB b left join fetch b.items"
> "from EntityA a left join fetch a.entityB"
> "from EntityA a left join fetch a.entityB.items"
> "from EntityA a left join fetch a.entityCs c left join fetch c.items" (where EntityA and EntityC have a one-to-many (@OneToMany) relationship, and EntityC.items is an element collection)
> Test code is attached. The log output along with thrown exception is attached as log.txt.
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