Soft upgrade allows you to run a newer version of Derby against an existing database without having to fully upgrade the database. This means that you can continue to run an older version of Derby against the database.
If you perform a soft upgrade, you will not be able to perform certain functions that are not available in older versions of Derby. For example, the following Derby Version 10.2 features cannot be used in a database that has been soft upgraded from 10.0:
The following 10.2 features cannot be accessed from a database which has been soft upgraded from 10.1:
Other new features in Derby that do not affect database structure, such as using timestamp arithmetic, are allowed in a soft upgraded database.
To perform a soft upgrade on a database created using an earlier version of Derby:
connect 'jdbc:derby:sample'In this example, the sample database is a Version 10.0 database.