Terminates the RdbALTER session and returns you to DCL command
    level. You can also press Ctrl/Z to end an RdbALTER session.

    If the EXIT command is issued and altered but uncommitted pages
    exist, you are told to issue either a COMMIT or a ROLLBACK
    command. RdbALTER does not exit until a COMMIT or a ROLLBACK
    operation has accounted for all altered pages.

    The EXIT command performs an implicit NOLOG command if a log file
    is open.