DBCHCL
DBCHCL first determines whether to use the DBCAREA or the RCB for the specified request when testing options by testing the set options flag of the DBCAREA. If it is “Y,” the DBCAREA options are used; otherwise, the RCB options are used. If the specified session is active, MTDP is called with the session and request identifiers of the active request, the function code set to MTDPRET, and the waitdata flag set according to the value of the selected options area’s waitdata flag.