oracle查看锁表的sql

oracle查看锁表的sql

关键表

• V$LOCKED_OBJECT ：记录锁信息的表
• v$session ：记录会话信息的表
• v$sql：记录执行sql的表
• dba_objects：用来管理对象（表、库等等对象）

查看锁表的SID

sql1

SELECT USERNAME,SID, LOCKWAIT, STATUS, MACHINE, PROGRAM
FROM v$session
WHERE sid IN (SELECT session_id FROM v$locked_object);

sql2

SELECT sess.SID, sess.SERIAL#, lo.ORACLE_USERNAME, lo.OS_USER_NAME, lo.LOCKED_MODE, ao.OBJECT_NAME
FROM V$LOCKED_OBJECT lo,
     v$session sess,
     dba_objects ao
WHERE lo.SESSION_ID = sess.SID
  AND ao.OBJECT_ID = lo.OBJECT_ID;

• USERNAME：死锁语句所用的数据库用户；
• SID: session_id
• LOCKWAIT：死锁的状态，如果有内容表示被死锁。
• STATUS：状态，active表示被死锁
• MACHINE：死锁语句所在的机器。
• PROGRAM：产生死锁的语句主要来自哪个应用程序。

查看锁表执行语句

用sid查询单个

SELECT sql_text
FROM v$sql
WHERE hash_value IN
      (SELECT sql_hash_value FROM v$session WHERE sid='XXXXXXXX');

查询所有加锁的sql

SELECT sql_text
FROM v$sql
WHERE hash_value IN
      (SELECT sql_hash_value FROM v$session WHERE sid IN (SELECT session_id FROM v$locked_object));

查询未提交事务的SQL

造成死锁的sql事务都必定是未提交的

SELECT s.SID,
       s.USERNAME,
       s.OSUSER,
       s.PROGRAM,
       TO_CHAR(s.LOGON_TIME, 'yyyy-mm-dd hh24:mi:ss')                                             AS LOGON_TIME,
       TO_CHAR(t.START_DATE, 'yyyy-mm-dd hh24:mi:ss')                                             AS START_DATE,
       s.STATUS,
       (SELECT q.SQL_TEXT FROM v$sql q WHERE q.LAST_ACTIVE_TIME = t.START_DATE AND rownum <= 1) AS SQL_TEXT
FROM v$session s,
     v$transaction t
WHERE s.SADDR = t.SES_ADDR;

杀死锁

ALTER SYSTEM KILL SESSION 'SID';