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https://issues.apache.org/jira/browse/OPENJPA-1696?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Catalina Wei resolved OPENJPA-1696.
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Fix Version/s: 2.1.0
Resolution: Fixed
> Type discriminator for polymorphic queries limited to Single Table inheritance
> ------------------------------------------------------------------------------
>
> Key: OPENJPA-1696
> URL: https://issues.apache.org/jira/browse/OPENJPA-1696
> Project: OpenJPA
> Issue Type: Bug
> Components: query
> Affects Versions: 2.0.0
> Reporter: Catalina Wei
> Assignee: Catalina Wei
> Fix For: 2.1.0
>
>
> JPA2.0 spec defines TYPE discriminator which can be used in JPQL query to
> return polymorphic query results. The spec is unclear that the TYPE
> discriminator is for Single table inheritance or it can be used for Table per
> class or inheritance type Joined or not.
> The initial implementation in OpenJPA has limited it for Single Table
> inheritance, but it does not block the usage for the other 2 types of
> inheritance.
> This resulting incorrect SQL generated and SQLExceptions.
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