Is it Possible to Update Inheritance Hierarchies?

Hi,

Considerer the following hierarchy:

Person <- Employee <- Boss

Each class is maped to a distinct table (Mapping Classes on Multiple Joined
Tables)
In this case, if I create an employee, two records are persisted in the DB
(1 person and 1 employee). What if this employee is promoted to a boss? How
can we update the hierarchy including just 1 new record at the end of the
chain? I've tried, but the whole chain is created again. Is it possible to
instruct OJB to just "append" 1 record at the Boss table?
Anyone here ever faced the same issue?

Thanks in advance!
Cleverson Schmidt
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