Before online DBTT extension is possible, online realm extension must be active for the realm in which the DBTT is located
If online realm extension is active and the system-related conditions for realm extension are fulfilled then you can activate online extensibility for a DBTT. You do this using the DAL command ACT DBTT-INCR (see section "Activating online DBTT extensibility for a record type (ACT DBTT-INCR)" in chapter "Activating online extensibility (ACT)").
The request is not executed until the PERFORM command is issued.
The online extensibility of the DBTT remains active until the DEACT DBTT command is issued for this DBTT (see section “Deactivating online extensibility (DEACT)”).
You can use the DAL command DISPLAY DBTT or the utility routine BSTATUS to obtain information on the online extensibility of a DBTT.
When databases are created, online DBTT extension is activated automatically for all DBTTs which are located in realms for which online realm extension is automatically activated by the utility routines BCREATE and BFORMAT. For details see section “Activating online extensibility when creating databases”.