How to find out which user has locked a particular record of a table

Question

Hi
Is it possible to know - which user has locked a particular record (I know the primary key of the record) of a table
Regards

Answer 1

select     OS_USER_NAME os_user,
     PROCESS os_pid,
     ORACLE_USERNAME oracle_user,
     l.SID oracle_id,
     decode(TYPE,
          'MR', 'Media Recovery',
          'RT', 'Redo Thread',
          'UN', 'User Name',
          'TX', 'Transaction',
          'TM', 'DML',
          'UL', 'PL/SQL User Lock',
          'DX', 'Distributed Xaction',
          'CF', 'Control File',
          'IS', 'Instance State',
          'FS', 'File Set',
          'IR', 'Instance Recovery',
          'ST', 'Disk Space Transaction',
          'TS', 'Temp Segment',
          'IV', 'Library Cache Invalidation',
          'LS', 'Log Start or Switch',
          'RW', 'Row Wait',
          'SQ', 'Sequence Number',
          'TE', 'Extend Table',
          'TT', 'Temp Table', type) lock_type,
     decode(LMODE,
          0, 'None',
          1, 'Null',
          2, 'Row-S (SS)',
          3, 'Row-X (SX)',
          4, 'Share',
          5, 'S/Row-X (SSX)',
          6, 'Exclusive', lmode) lock_held,
     decode(REQUEST,
          0, 'None',
          1, 'Null',
          2, 'Row-S (SS)',
          3, 'Row-X (SX)',
          4, 'Share',
          5, 'S/Row-X (SSX)',
          6, 'Exclusive', request) lock_requested,
     decode(BLOCK,
          0, 'Not Blocking',
          1, 'Blocking',
          2, 'Global', block) status,
     OWNER,
     OBJECT_NAME
from     v$locked_object lo,
     dba_objects do,
     v$lock l
where      lo.OBJECT_ID = do.OBJECT_ID
AND l.SID = lo.SESSION_ID
hope this helps
Zekeriya