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https://issues.apache.org/jira/browse/OPENJPA-1043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pinaki Poddar reassigned OPENJPA-1043:
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Assignee: Pinaki Poddar
> JPQL queries do not support queries on a MappedSuperclass
> ---------------------------------------------------------
>
> Key: OPENJPA-1043
> URL: https://issues.apache.org/jira/browse/OPENJPA-1043
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 1.2.1
> Reporter: Jeremy Bauer
> Assignee: Pinaki Poddar
> Attachments: openJPATestcase.zip
>
>
> This issue was reported by Jim Weaver via a nabble user forum post[1]. The
> JPA specification clearly states that queries upon a mapped superclass are
> not permitted, but the OpenJPA documentation has a note saying that they are
> supported[2].
> Given:
> @MappedSuperclass class A { }
> @Entity class B extends A { }
> @Entity class C extends A { }
> I found that:
> a) The em.find(A.class, id) operation does indeed allow the use of mapped
> superclass. OpenJPA issues a select upon tables B and C looking for a
> matching ID.
> b) A JPQL query does not: SELECT a FROM A a fails with exception: (as
> reported by Jim)
> I receive error message "An error occurred while parsing the query filter
> "SELECT a FROM A a". Error message: The name "A" is not a recognized
> entity or identifier. Perhaps you meant B, which is a close match. Known
> entity names: [B, C]"
> I attempted the same test with the OpenJPA base 1.0 provider and it failed
> with the same error so it doesn't look like this was ever supported via. JPQL.
> If the decision is made not to provide this support in the near future, the
> documentation should be updated to qualify that mapped superclass is only
> allow on a find.
> [1]
> http://n2.nabble.com/Can%27t-query-against-a-MappedSuperclass-tp2665700p2665700.html
> [2]
> http://openjpa.apache.org/builds/latest/docs/manual/manual.html#jpa_overview_meta_embeddablesuper
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