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From "Heath Thomann (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OPENJPA-2132) Traversal of a OneToMany relationship returns an empty list when InheritanceType.JOINED or SINGLE_TABLE is used.
Date Tue, 14 Feb 2012 20:50:01 GMT
Traversal of a OneToMany relationship returns an empty list when InheritanceType.JOINED or
SINGLE_TABLE is used.
----------------------------------------------------------------------------------------------------------------

                 Key: OPENJPA-2132
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2132
             Project: OpenJPA
          Issue Type: Bug
          Components: query
    Affects Versions: 2.1.1, 2.0.1, 2.2.0
            Reporter: Heath Thomann
            Assignee: Heath Thomann
         Attachments: OneManyJoinableTest.test

I will include a test, named 'OneManyJoinableTest.test' which recreates the issue of this
JIRA.  Basically though, the test consists of a parent class defined with '@Inheritance(strategy=InheritanceType.JOINED)'.
 One of the subclasses in the hierarchy contains a (bidirectional) OneToMany relationship.
 When traversing the ManyToOne side of the relations, all works well.  But when traversing
the OneToMany side an empty list is returned.  When running the test, it can be seen that
OpenJPA generate incorrect SQL, as follows:

SELECT t1.id, t0.id, t2.id, t3.id, t1.name FROM UMLType t0, UMLNamed t1, UMLClass t2, UMLPrimitiveType
t3 WHERE t0.OWNERPACKAGE_ID = ? AND t2.id IS NULL AND t3.id IS NULL AND t0.id = t1.id AND
t0.id = t2.id(+) AND t0.id = t3.id(+)

Note that the 't2.id IS NULL AND t3.id IS NULL' seems suspect.

This same test passes on OpenJPA 1.2.x but fails on OpenJPA 2.0.x on wards.  





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