I`m migrating scripts written for DB2 for AIX to use DB2 for z/OS Version 8.

Some scripts use IMPORT Command with INSERT_UPDATE

What would be the best approach to implement a similar functionality on mainframe, with minumum code change?

My DB2 Connect V8 is on z/Linux.

I can make changes to the target table defn, like, creating a trigger etc.

Thanks in advance for any input