ORACLE锁表

--查询锁表
SELECT /*+ rule */
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, DBA_OBJECTS O
WHERE L.SID = S.SID
   AND L.ID1 = O.OBJECT_ID(+)
   AND S.USERNAME IS NOT NULL;

SELECT OBJECT_NAME AS 对象名称, S.SID, S.SERIAL#, P.SPID AS 系统进程号
  FROM V$LOCKED_OBJECT L, DBA_OBJECTS O, V$SESSION S, V$PROCESS P
WHERE L.OBJECT_ID = O.OBJECT_ID
   AND L.SESSION_ID = S.SID
   AND S.PADDR = P.ADDR;
2.在数据库中灭掉相关session：

    alter system kill session 'sid,serial#';

    --sid及serial#为第一步查出来的数据

     3.从系统中灭掉与该session对应的进程：
orakill ORCL spid
    kill -9 spid;



--存储过程
--1.查看是哪一个存储过程被锁住
--查V$DB_OBJECT_CACHE视图
select * from V$DB_OBJECT_CACHE where owner='FWMS4FS' AND LOCKS!='0'


--2.查看是哪一个sid，通过sid可以知道是哪一个session
--查v$access视图
select * from v$access where  OBJECT='DRAG_DATA_FROM_LCAM'
--3.查出sid和serial#
--查v$session视图
select sid,serial#,paddr from v$session where sid='127';
--查v$process视图
select spid from v$process where addr='C7A87E9C';
--4.杀进程
--4.1先杀oracle进程
alter system kill session '查出的sid,查出的serial#';
ALTER SYSTEM KILL SESSION '145,23809';
--4.2再杀操作系统进程
--如果是unix
--kill -9 刚查出的spid
--如果是windows
select instance_name from v$instance
--orakill 刚查出的sid 刚查出的spid 3236
orakill oradb10 1304

--查询状态
SELECT SESSION_ID     SID,
       OWNER,
       NAME,
       TYPE,
       MODE_HELD      HELD,
       MODE_REQUESTED REQUEST
  FROM DBA_DDL_LOCKS
WHERE NAME = 'DRAG_DATA_FROM_LCAM';

SELECT T1.SID, T1.SERIAL#, T2.SQL_TEXT
  FROM V$SESSION T1, V$SQL T2
WHERE T1.SQL_ID = T2.SQL_ID
AND T2.SQL_TEXT LIKE '%DRAG_DATA_FROM_LCAM%';

SELECT DISTINCT P.SPID, S.SID, S.SERIAL#  FROM V$DB_OBJECT_CACHE   OC,
       V$OBJECT_DEPENDENCY OD,
       DBA_KGLLOCK         W,
       V$SESSION           S,
       V$PROCESS           P
WHERE OD.TO_OWNER = OC.OWNER
   AND OD.TO_NAME = OC.NAME
   AND OD.TO_ADDRESS = W.KGLLKHDL
   AND W.KGLLKUSE = S.SADDR
   AND P.ADDR = S.PADDR
   AND OC.NAME = UPPER('drag_data_from_lcam');



Oracle的锁表与解锁 
SELECT /*+ rule */ 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,dba_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+)
AND s.username is NOT Null
--kill session语句
alter system kill session'50,492';
--以下几个为相关表
SELECT * FROM v$lock;
SELECT * FROM v$sqlarea;
SELECT * FROM v$session;
SELECT * FROM v$process ;
SELECT * FROM v$locked_object;
SELECT * FROM all_objects;
SELECT * FROM v$session_wait;
--1.查出锁定object的session的信息以及被锁定的object名
SELECT l.session_id sid, s.serial#, l.locked_mode,l.oracle_username,
l.os_user_name,s.machine, s.terminal, o.object_name, s.logon_time
FROM v$locked_object l, all_objects o, v$session s
WHERE l.object_id = o.object_id
AND l.session_id = s.sid
ORDER BY sid, s.serial# ;
--2.查出锁定表的session的sid, serial#,os_user_name, machine name, terminal和执行的语句
--比上面那段多出sql_text和action
SELECT l.session_id sid, s.serial#, l.locked_mode, l.oracle_username, s.user#,
l.os_user_name,s.machine, s.terminal,a.sql_text, a.action
FROM v$sqlarea a,v$session s, v$locked_object l
WHERE l.session_id = s.sid
AND s.prev_sql_addr = a.address
ORDER BY sid, s.serial#;
--3.查出锁定表的sid, serial#,os_user_name, machine_name, terminal，锁的type,mode
SELECT s.sid, s.serial#, s.username, s.schemaname, s.osuser, s.process, s.machine,
s.terminal, s.logon_time, l.type
FROM v$session s, v$lock l
WHERE s.sid = l.sid
AND s.username IS NOT NULL
ORDER BY sid;
这个语句将查找到数据库中所有的DML语句产生的锁，还可以发现，
任何DML语句其实产生了两个锁，一个是表锁，一个是行锁。
杀锁命令
alter system kill session 'sid,serial#'
SELECT /*+ rule */ s.username,
decode(l.type,'TM','TABLE LOCK',
'TX','ROW LOCK',
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
FROM v$session s,v$lock l,dba_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+)
AND s.username is NOT NULL
如果发生了锁等待，我们可能更想知道是谁锁了表而引起谁的等待
以下的语句可以查询到谁锁了表，而谁在等待。
以上查询结果是一个树状结构，如果有子节点，则表示有等待发生。
如果想知道锁用了哪个回滚段，还可以关联到V$rollname，其中xidusn就是回滚段的USN
col user_name format a10
col owner format a10
col object_name format a10
col object_type format a10
SELECT /*+ rule */ lpad(' ',decode(l.xidusn ,0,3,0))||l.oracle_username User_name,
o.owner,o.object_name,o.object_type,s.sid,s.serial#
FROM v$locked_object l,dba_objects o,v$session s
WHERE l.object_id=o.object_id
AND l.session_id=s.sid
ORDER BY o.object_id,xidusn DESC