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In order to get the best performance and avoid possible data loss, i'm making a research as to the best datatypes to be used on all sides, database, java and hibernate.

Because of that, i would like to know if there's anything on Hibernate side that i should take care of...

Are there any Best Practices on that matter?

Thanks a lot to all.

Although Hibernate supports either, I (indeed most people) find that it is safest to use object types (Long, Boolean) rather than primitive types (long, boolean) for a number of reasons. They more accurately reflect a null state in the db, for one thing. Also, if you intend to use query-by-example, you'll need properties that are nullable so that you can omit them as query parameters.

Hope this helps you out,

Chris