{ ADD SUPPLEMENTAL LOG
        { supplemental_log_grp_clause
        | supplemental_id_key_clause
        }
      [, SUPPLEMENTAL LOG
           { supplemental_log_grp_clause
           | supplemental_id_key_clause
           }
      ]...
| DROP SUPPLEMENTAL LOG
         { supplemental_id_key_clause
         | GROUP log_group
         }
       [, SUPPLEMENTAL LOG
            { supplemental_id_key_clause
            | GROUP log_group
            }
       ]...
}