Is it possible to have a persistable object without an ID property? I have millions of objects that are saved often, and a primary key is not necessary. Each has a timestamp, but there may be two objects with the same timestamp.

I'm trying to save as much database space as possible.

Any ideas?

Anyone? If this is not possible, just let me know.

From Hibernate In Action:



If your table really doesn't permit duplicate rows, then you can always make every column part of the PK.

Personally, I wouldn't think saving a little disk space is worth the trouble, and would just add a PK column.

Understood. I appreciate the response.