On Linux or Solaris with UDB 8.2.2, can an SQL/PL stored-procedure
use two-phase-commit with nicknames and if DB2 provides the
Transaction-manager?

i.e. in the same transaction, can an SQL/PL procedure
update a local table and
also update a nicknamed-table (in another database
on the same hostname), before committing ?

Is this possible, or must I have a CLI procedure and not use nicknames?

To answer my own question, from the v8.2 "federated systems guide":
"Federated Systems do not currently support the two phase commit
protocol".