Koichi There is no built-in functionality to migrate the system database from one database management system (DBMS) to another vendor’s DBMS. While the Axon Ivy Engine itself no longer requires "history" data, the corresponding tables still exist. Manually purging this data can be risky if you are not fully aware of the implications.
Therefore, I recommend cleaning up old data using the Java API. In particular, you may want to look at:
ch.ivyteam.ivy.workflow.IWorkflowContext.deleteCompletedCase(ICase).
