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general question : best practice.

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cablepuff

Post subject: general question : best practice.

Posted: Wed Apr 09, 2008 1:10 am

Regular

Joined: Tue Apr 01, 2008 5:39 pm
Posts: 61

I was wondering when it would be good to map natural-id and when it would be good to map composite-id?

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ferozz

Post subject:

Posted: Thu Apr 10, 2008 2:45 am

Regular

Joined: Mon Aug 06, 2007 10:49 am
Posts: 67
Location: Banska Bystrica, Slovakia

natural-id is good when u use 2nd level caching and u want to look up object based on natural id so there will be no query cache in this case but object will be loaded from cache as is usual for retrieval by its identifier

about composite-id: i prefer not to use composite id, just caused more trouble then usage for me

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thiagodf

Post subject:

Posted: Thu Apr 10, 2008 10:06 am

Newbie

Joined: Tue Jan 22, 2008 9:53 am
Posts: 18

I have used the composite ID successfully when i need to, But i have an advice. Avoid to use composite-id when you need an automatic generator for this id as a sequence for example. It's really problematic with generators.

hope it helps you to take your decision

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