In a mixed-version system, only Replication Servers of version 11.5 or later can work with classes that participate in function-string inheritance.
Any class whose primary site is Replication Server version 11.0.x cannot participate in function-string inheritance. If you want to alter such a class to become a derived class or use it as a parent class, you must move that class to a primary site that is Replication Server version 11.5 or later. Then you can alter the class relationships as desired and assign the class or its derived classes to connections managed by Replication Server version 11.5 or later.
A base class that you created in Replication Server version 11.5 or later and that does not participate in function-string inheritance can be assigned to connections managed by any Replication Server in the replication system. If it is not assigned to any databases managed by Replication Server version 11.5 or later, then you can use the move primary command to assign it to a primary site managed by Replication Server version 11.0.x.
Refer to the release bulletin for more information about compatibility between Replication Servers.
For compatibility with Replication Servers of version
11.0.x, you may need to continue to customize function strings in rs_sqlserver_function_class. However,
for databases managed by Replication Servers version 11.5 or later, using
function-string inheritance and customizing function strings only
in derived classes is encouraged.
