[jpa-spec users] _at_OrderColumn questions along with _at_ManyToMany + @JoinTable mappings

From: Karsten Wutzke <>
Date: Tue, 3 Apr 2012 05:20:53 +0200 (CEST)
Dear JPA experts,

I am trying to model a tree structure with ordered lists using @OrderColumn on a @ManyToMany + @JoinTable into both directions. I have put up a detailed question including an image here:

I was wondering about three things (as taken from there):

1. Are @OrderColumn's supported for @ManyToMany(mappedBy = ...) + @JoinTable (inverse bi-dir relationship)?
2. Are @OrderColumn's also being part of a foreign key supposed to be supported, even though the JPA spec remains silent about this? I see no reason why not requiring all JPA implementations to support this.
3. Because Hibernate throws a MappingException on 2., does this probably qualify as a bug?

I'd very much appreciate your input on this.

Karsten Wutzke

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