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shlomiTheDev
 Post subject: @UniqueConstraint purpose
PostPosted: Wed Aug 26, 2015 4:14 am 
Newbie

Joined: Wed Aug 26, 2015 3:31 am
Posts: 1
Hi all,
I have started working on Hibernate recently ,
I'm trying to understand what is the purpose of @UniqueConstraint , I have a unique constraint on mysql and i can get the errors from mysql.
What the @UniqueConstraint gives me? even if I applies it, still I need to trip to db.

It would be great if someone explain the advantages of this annotation.

10x ahead.
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DavideD
 Post subject: Re: @UniqueConstraint purpose
PostPosted: Wed Aug 26, 2015 5:40 am 
Hibernate Team
Hibernate Team

Joined: Fri Sep 09, 2011 3:18 am
Posts: 295
Hi,
it is used during the generation/update of the tables.
Hibernate (or the JPA implementation) needs to know which additional constraints are required.

Not sure if it used in some other cases.

Cheers,
Davide
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