Request Set Execution Details Query

SELECT prog.user_concurrent_program_name || DECODE(req.description,NULL,NULL, ':' || req.description) Name
     , req.request_id
     , req.parent_request_id
     , req.request_date
     , DECODE(req.request_type,'P',actual_start_date, requested_start_date)
     , req.actual_completion_date
     , floor(((actual_completion_date        - DECODE(req.request_type,'P',actual_start_date, requested_start_date))*24
            )     ) || ':' ||
       floor(((actual_completion_date        - DECODE(req.request_type,'P',actual_start_date, requested_start_date))*24 -
               floor((actual_completion_date - DECODE(req.request_type,'P',actual_start_date, requested_start_date))*24)
            ) * 60) || ':' ||
       floor(((actual_completion_date        - DECODE(req.request_type,'P',actual_start_date, requested_start_date))*24*60-
               floor((actual_completion_date - DECODE(req.request_type,'P',actual_start_date, requested_start_date))*24*60)
            ) * 60) Duration
     , req.phase_code
     , req.status_code
     , req.argument_text
     , usr.user_name
     , resp.responsibility_name
  FROM apps.fnd_concurrent_requests    req
     , apps.fnd_concurrent_programs_vl prog
     , apps.fnd_responsibility_vl      resp
     , apps.fnd_user                   usr
     , (SELECT req.request_id
          FROM apps.fnd_concurrent_requests req
             , apps.fnd_request_sets_vl     rset
         WHERE req.argument1 = TO_CHAR(rset.application_id)
           AND req.argument2 = TO_CHAR(rset.request_set_id)
           AND ( rset.request_set_name             LIKE :req_set_name OR
                 UPPER(rset.user_request_set_name) LIKE Upper(:user_req_set_name) OR
                 req.request_id = :request_id
               )
         --  AND req.parent_request_id = -1
       ) a
 WHERE req.priority_request_id           = a.request_id
   AND req.program_application_id        = prog.application_id
   AND req.concurrent_program_id         = prog.concurrent_program_id
   AND req.responsibility_id             = resp.responsibility_id
   AND req.responsibility_application_id = resp.application_id
   AND req.requested_by                  = usr.user_id
   and prog.user_concurrent_program_name not like 'Request Set Stage%'
   order by req.request_id