JPA not generating “on delete set null” FK restrictions

Question

I have two related clases JPA-annotated. Alarm and Status. One Alarm can have one Status.

What I need is to be able to delete one Status and \"propagate\" a null v

Answer 1

OpenJPA has

@ForeignKey(deleteAction=ForeignKeyAction.NULL)

but there is no standard JPA way to do this (and apparently it is impossible with Hibernate).

Makes me want to go back to JDO.