Jeremy Boynes wrote:Add to that if someone is upgrading JVM version there is a good chance they are also going to upgrade database version as well, which would be a different jar anyway.Not always true. Reverting back to an old jvm is easy in case of a problem, but that is not always true with the databases :-)
Once the database is upgraded , it is not easy to revert back to an old verions that easily.
If the physical format changes then definitely. But hopefully we would be able to run a newer version in a mode that kept the old physical format allowing a quick rollback. However, that's an entirely different but equally important discussion :-)
-- Jeremy
