Hibernate - does it change the structure of a database?

Question

I\'m building bigger project in java on Spring and lot of people have adviced me, to use hibernate to ease access to the database. The problem is,that I have to use database

Answer 1

Hibernate is a highly mature project and definitely works well with existing schemas. You can even generate your class entities from an existing schema with Hibernate tools.

Still there is an important point where you need be careful: Hibernate supports composite primary and foreign keys but you'll have a much easier life with technical generated ids.

If I had a schema with composite primary keys forming natural ids I would consider replacing them with technical auto generated ids before using Hibernate.