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 Èç¹û½ö½öÊÇlock£¬ÒÔÏÂÓï¾ä¿ÉÒÔ·¢ÏÖËùÓÐÓû§Ëø  :
SELECT s.username,
       decode(l.type, 'TM', 'TABLE LOCK', 'TX', 'ROW LOCK', NULL) LOCK_LEVEL,
       o.owner,
       o.object_name,
       o.object_type,
       s.sid,
       s.serial#,
       s.terminal,
       s.machine,
       s.program,
       s.osuser
  from v$session s, v$lock l, all_objects o
 WHERE l.sid = s.sid
   AND l.id1 = o.object_id(+)
   AND s.username is NOT Null
Èç¹ûÓÐËøµÈ´ý»òËÀËø£¬¿ÉÒÔͨ¹ýÒÔÏÂÓï¾ä·¢ÏÖ:
select lpad('   ', decode(l.xidusn, 0, 3, 0)) || l.oracle_username User_name,
       o.owner,
       o.object_name,
       o.object_type
  from v$locked_object l, dba_objects o
 where l.object_id = o.object_id
 order by o.object_id desc


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ORACLE parent latchºÍchildren latch

         About parent vs child latches. There is no fundamental low level difference between parent and child latches, they are all small regions of memory modified with atomic test-and-set style opcodes.
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Oracle select in/exists/not in/not exits

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OracleÖеÄprofile

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