HI Rafal, I have attached the generated derby DDL scripts for the hibernate DAO (derby-hib.sql) and JPA DAO (derby.sql). They are very similar and it shouldn't be much of a problem to make the JPA entities map to the hibernate schema. It is probably best that there is one static and supported DB schema anyway.
While addressing the JPA changes we should also consider upgrading to JPA 2.0. There are only a few features that would simplify the JPA code but if there are not that many current ODE JPA users it would be best to start off with the latest version and avoid future versioning conflicts. Regards, Aaron From: Rafal Rusin <[email protected]> To: Jeff Yu <[email protected]>; Aaron Anderson <[email protected]> Cc: [email protected] Sent: Thu, June 10, 2010 9:01:00 AM Subject: Changing roadmap for JPA refactoring Hello, is this possible (and how much effort it is) to make JPA (hibernate powered version) work on the same schema as dao-hib does? This way we could migrate all current hibernate users to JPA in future and finally drop hib-dao. I believe there are not much current OpenJPA users, so we can modify this schema. On the other hand, there's a lot of dao-hib users, so we really want to migrate them (because of later drop for dao-hib). What do you think? -- Regards, Rafał Rusin http://rrusin.blogspot.com
