metaconfig=# select max(id), max(run_schedule), exe_handler, exe_method from configoperation group by exe_handler, exe_method;
 max |         max         | exe_handler |   exe_method   
-----+---------------------+-------------+----------------
  59 | 2012-01-01 23:40:00 | management  | command
   1 | 2011-10-07 23:30:00 | config      | update-machine
   5 | 2011-10-01 23:40:00 | aptget      | check
(3 rows)