Allows enabling and disabling of database system debug flags for
    the current session.

    The literal or host variable passed to this command can contain
    a list of keywords, or negated keywords, separated by commas.
    Spaces are ignored. The keywords may be abbreviated to an
    unambiguous length.

                                   NOTE

       Oracle Corporation reserves the right to add new keywords
       to the SET FLAGS statement in any release or update to
       Oracle Rdb, which may change this unambiguous length.
       Therefore, it is recommended that the full keyword be used
       in applications.