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Relationships/FKs to non-PK columns [message #667803]

Mon, 02 May 2011 09:51

Karsten Wutzke

Messages: 124
Registered: July 2009

Senior Member

I just found out that officially relationships/foreign keys to non-primary key columns aren't supported by JPA. See here:

http://stackoverflow.com/questions/5818373/jpa-does-the-jpa- specification-allow-references-to-non-primary-key-columns

Why do such relationships map in EclipseLink nontheless (only in JPA 1.0 syntax as in the example posted there)??

It appears that EclipseLink just maps the columns naively, which I think is a good thing, but I'd like to know explicitly. Is it coincidence? Is it intended? Is there anything in the docs where it supports this scenario?

Karsten

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