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 Post subject: foreign key points to different column dynamically
PostPosted: Fri Aug 19, 2016 8:46 pm 
Newbie

Joined: Tue Aug 05, 2008 3:11 pm
Posts: 7
Legacy database 2 tables:
table A (a materialized view): col-a1, col-a2, ...
table B: id, col-b1, ...

Question:
col-b1 contains combined values of col-a1 and col-a2
for some rows, col-b1's values reference to col-a1; for other rows, col-b1's values reference to col-a2

How should I do hibernate entity mapping with annonation? I need col-a1 be primary key sometime to join col-b1, and col-a2 be primary other times to join col-b1. Is it possible?

I don't want to create 2 sets of entities (i.e Entity_A1, col-a1 PK --> Entity_B1; Entity_A2 col-a2 PK --> Entity_B2)
thanks


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 Post subject: Re: foreign key points to different column dynamically
PostPosted: Mon Aug 29, 2016 4:16 am 
Hibernate Team
Hibernate Team

Joined: Thu Sep 11, 2014 2:50 am
Posts: 1638
Location: Romania
Try using @JoinColumnOrFormula as indicated in this StackOverflow answer.

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If you liked my answer, you are going to love my High-Performance Java Persistence book and my blog as well.


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