You can use a query band statement to change the routing rule of a session dynamically. The query band rule makes sure that particular reporting or load processes use a specific routing rule.
If the client application is already using the routing rule, then the query band has no effect. If the client specifies a new routing rule, it disconnects the Business Continuity Manager sessions and reconnects using the specified routing rule.
The following example demonstrates a report that is intended to run only on the first DB1 system, using the DB1_Only routing rule.
SET QUERY_BAND = 'BCMROUTING=DB1_Only;’ For Session;