使用DBA_DDL_LOCKS视图获得DDL锁定信息
1.查询所有DDL lock的信息
sys@ora10g> select * from dba_ddl_locks;
SESS OWNER NAME TYPE MODE_HELD MODE_REQU
---- ----- --------------------- -------------------- --------- ---------
162 SYS SCHEDULER$_INSTANCE_S Table/Procedure/Type Null None
161 SYS AQ$_ALERT_QT_E 10 Null None
161 SYS DBMS_HA_ALERTS_PRVT Body Null None
161 SYS DBMS_PRVT_TRACE Table/Procedure/Type Null None
161 SYS PLITBLM Table/Procedure/Type Null None
161 SYS PLITBLM Table/Procedure/Type Null None
161 SYS STANDARD Table/Procedure/Type Null None
161 SYS DBMS_HA_ALERTS_PRVT Table/Procedure/Type Null None
161 SYS DBMS_PRVT_TRACE Body Null None
161 SYS DBMS_APPLICATION_INFO Table/Procedure/Type Null None
161 SYS STANDARD Body Null None
161 SYS DBMS_APPLICATION_INFO Body Null None
161 SYS DBMS_BACKUP_RESTORE Body Null None
161 SYS ALERT_QUE_R 23 Null None
161 SYS ALERT_QUE_R 23 Null None
161 SYS DBMS_BACKUP_RESTORE Table/Procedure/Type Null None
161 SYS DBMS_RCVMAN Body Null None
158 SYS DICTIONARY_OBJ_OWNER Table/Procedure/Type Null None
158 SYS DBMS_STANDARD Table/Procedure/Type Null None
158 SYS DBMS_OUTPUT Body Null None
158 SYS PLITBLM Table/Procedure/Type Null None
158 SYS DICTIONARY_OBJ_TYPE Table/Procedure/Type Null None
158 SEC SEC 18 Null None
158 SYS DATABASE 18 Null None
158 SYS DBMS_OUTPUT Table/Procedure/Type Null None
158 SYS DBMS_APPLICATION_INFO Table/Procedure/Type Null None
158 SYS AW_DROP_PROC Table/Procedure/Type Null None
158 SYS DBMS_APPLICATION_INFO Body Null None
158 SYS DICTIONARY_OBJ_NAME Table/Procedure/Type Null None
145 SYS DBMS_OUTPUT Body Null None
145 SYS PLITBLM Table/Procedure/Type Null None
145 SYS DATABASE 18 Null None
145 SYS DBMS_OUTPUT Table/Procedure/Type Null None
145 SYS OBJECT_GRANT Table/Procedure/Type Null None
34 rows selected.
2.如果提示没有这个视图，可以在sys用户下执行$ORACLE_HOME/rdbms/admin/catblock.sql脚本进行创建（这个脚本还包含其他一些非常有意义的锁相关视图）
sys@ora10g> conn / as sysdba
Connected.
sys@ora10g> @?/rdbms/admin/catblock.sql
这里省略创建过程
3.Oracle 10g官方文档中关于视图DBA_DDL_LOCKS的描述如下
DBA_DDL_LOCKS
DBA_DDL_LOCKSlists all DDL locks held in the database and all outstanding requests for a DDL lock.
SESSION_ID |
NUMBER |
Session identifier | |
OWNER |
VARCHAR2(30) |
Owner of the lock | |
NAME |
VARCHAR2(30) |
Name of the lock | |
TYPE |
VARCHAR2(40) |
Lock type: | |
MODE_HELD |
VARCHAR2(9) |
Lock mode:
|
|
MODE_REQUESTED |
VARCHAR2(9) |
Lock request type:
|
4.打印一下catblock.sql脚本的内容，这个创建脚本其实可以当做一个参考文档来用，尤其是其中关于锁类型的描述。
ora10g@testdb /home/oracle$ cat $ORACLE_HOME/rdbms/admin/catblock.sql
rem
rem $Header: catblock.sql 07-jan-2004.12:19:20 kigoyal Exp $ blocking.sql
rem
Rem Copyright (c) 1989, 2004, Oracle Corporation. All rights reserved.
Rem NAME
Rem catblock.sql
Rem FUNCTION - create views of oracle locks
Rem NOTES
Rem MODIFIED
Rem kigoyal 01/06/04 - DBA_WAITERS/BLOCKERS to use "enq:%"
Rem gviswana 05/24/01 - CREATE OR REPLACE SYNONYM
Rem jdavison 10/10/00 - Fix dba_lock_internal view
Rem vsaksena 07/07/00 - Optimize views DBA_BLOCKERS, DBA_WAITERS
Rem arithikr 02/10/00 - 878668: Fix DBA_WAITERS view for OPS environment
Rem sparrokk 12/17/99 - 1040651: Use v$lock defn without hint
Rem in dba_dml_locks
Rem mjungerm 06/15/99 - add java shared data object type
Rem nireland 03/17/98 - Add synonyms for DBA_WAITERS, DBA_BLOCKERS
Rem and others. #605559
Rem agardner 04/02/97 - bug #226646: remove comment
Rem jwijaya 03/19/97 - support types
Rem asurpur 04/08/96 - Dictionary Protection Implementation
Rem pgreenwa 08/14/95 - bug #293557: optimize view queries
Rem wmaimone 01/04/96 - 7.3 merge
Rem pgreenwa 05/10/95 - fix dba_lock_internal
Rem pgreenwa 04/25/95 - add new vlock columns
Rem drady 03/22/93 - merge changes from branch 1.1.312.1
Rem drady 03/18/93 - fix 154271
Rem glumpkin 10/17/92 - renamed from BLOCKING.SQL
Rem tpystyne 09/14/92 - rename sid to session_id
Rem jloaiza 07/30/92 - fix for KGL change
Rem tpystyne 05/27/92 - add dba_dml_locks and dba_ddl_locks views
Rem jloaiza 05/24/91 - upgrade for v7
Rem Loaiza 11/01/89 - Creation
Rem
/* this is an auxiliary view containing the KGL locks and pins */
create or replace view DBA_KGLLOCK as
select kgllkuse, kgllkhdl, kgllkmod, kgllkreq, 'Lock' kgllktype from x$kgllk
union all
select kglpnuse, kglpnhdl, kglpnmod, kglpnreq, 'Pin' kgllktype from x$kglpn;
create or replace public synonym DBA_KGLLOCK for DBA_KGLLOCK;
grant select on DBA_KGLLOCK to select_catalog_role;
/*
* DBA_LOCK has a row for each lock that is being held, and
* one row for each outstanding request for a lock or latch.
* The columns of DBA_LOCK are:
* session_id - session holding or acquiring the lock
* type - type of lock
* mode_held - mode the lock is currently held in by the session
* mode_requested - mode that the lock is being requested in by the process
* lock_id1 - type specific identifier of the lock
* lock_id2 - type specific identifier of the lock
* last_convert - time (in seconds) since last convert completed
* blocking_others - is this lock blocking other locks
*/
drop synonym DBA_LOCKS;
drop view DBA_LOCKS;
create or replace view DBA_LOCK as
select
sid session_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', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
to_char(lmode)) mode_held,
decode(request,
0, 'None', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
to_char(request)) mode_requested,
to_char(id1) lock_id1, to_char(id2) lock_id2,
ctime last_convert,
decode(block,
0, 'Not Blocking', /* Not blocking any other processes */
1, 'Blocking', /* This lock blocks other processes */
2, 'Global', /* This lock is global, so we can't tell */
to_char(block)) blocking_others
from v$lock;
create or replace public synonym DBA_LOCK for DBA_LOCK;
grant select on DBA_LOCK to select_catalog_role;
create or replace public synonym DBA_LOCKS for DBA_LOCK;
/*
* DBA_LOCK_INTERNAL has a row for each lock or latch that is being held, and
* one row for each outstanding request for a lock or latch.
* The columns of DBA_LOCK_INTERNAL are:
* session_id - session holding or acquiring the lock
* type - type of lock (DDL, LATCH, etc.)
* mode_held - mode the lock is currently held in by the session
* mode_requested - mode that the lock is being requested in by the process
* lock_id1 - type specific identifier of the lock
* lock_id2 - type specific identifier of the lock
*
* NOTE: this view can be very, very slow depending on the size of your
* shared pool area and database activity.
*/
create or replace view DBA_LOCK_INTERNAL as
select
sid session_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', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
to_char(lmode)) mode_held,
decode(request,
0, 'None', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
to_char(request)) mode_requested,
to_char(id1) lock_id1, to_char(id2) lock_id2
from v$lock /* processes waiting on or holding enqueues */
union all /* procs holding latches */
select s.sid, 'LATCH', 'Exclusive', 'None', rawtohex(laddr), ' '
from v$process p, v$session s, v$latchholder h
where h.pid = p.pid /* 6 = exclusive, 0 = not held */
and p.addr = s.paddr
union all /* procs waiting on latch */
select sid, 'LATCH', 'None', 'Exclusive', rawtohex(latchwait), ' '
from v$session s, v$process p
where latchwait is not null
and p.addr = s.paddr
union all /* library cache locks */
select s.sid,
decode(ob.kglhdnsp, 0, 'Cursor', 1, 'Table/Procedure/Type', 2, 'Body',
3, 'trigger', 4, 'Index', 5, 'Cluster', 13, 'Java Source',
14, 'Java Resource', 32, 'Java Data', to_char(ob.kglhdnsp))
|| ' Definition ' || lk.kgllktype,
decode(lk.kgllkmod, 0, 'None', 1, 'Null', 2, 'Share', 3, 'Exclusive',
to_char(lk.kgllkmod)),
decode(lk.kgllkreq, 0, 'None', 1, 'Null', 2, 'Share', 3, 'Exclusive',
to_char(lk.kgllkreq)),
decode(ob.kglnaown, null, '', ob.kglnaown || '.') || ob.kglnaobj ||
decode(ob.kglnadlk, null, '', '@' || ob.kglnadlk),
rawtohex(lk.kgllkhdl)
from v$session s, x$kglob ob, dba_kgllock lk
where lk.kgllkhdl = ob.kglhdadr
and lk.kgllkuse = s.saddr;
create or replace public synonym DBA_LOCK_INTERNAL for DBA_LOCK_INTERNAL;
grant select on DBA_LOCK_INTERNAL to select_catalog_role;
/*
* DBA_DML_LOCKS has a row for each DML lock that is being held, and
* one row for each outstanding request for a DML lock. It is subset
* of DBA_LOCKS
*/
create or replace view DBA_DML_LOCKS as
select
sid session_id,
u.name owner,
o.name,
decode(lmode,
0, 'None', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
'Invalid') mode_held,
decode(request,
0, 'None', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
'Invalid') mode_requested,
l.ctime last_convert,
decode(block,
0, 'Not Blocking', /* Not blocking any other processes */
1, 'Blocking', /* This lock blocks other processes */
2, 'Global', /* This lock is global, so we can't tell */
to_char(block)) blocking_others
from (select l.laddr addr, l.kaddr kaddr, /* 1040651: Defn for v$lock */
s.ksusenum sid, r.ksqrsidt type, r.ksqrsid1 id1,
r.ksqrsid2 id2, l.lmode lmode, l.request request,
l.ctime ctime, l.block block
from v$_lock l, x$ksuse s, x$ksqrs r
where l.saddr = s.addr and l.raddr = r.addr and
s.inst_id = USERENV('Instance')) l, obj$ o, user$ u
where l.id1 = o.obj#
and o.owner# = u.user#
and l.type = 'TM';
create or replace public synonym DBA_DML_LOCKS for DBA_DML_LOCKS;
grant select on DBA_DML_LOCKS to select_catalog_role;
/*
* DBA_DDL_LOCKS has a row for each DDL lock that is being held, and
* one row for each outstanding request for a DDL lock. It is subset
* of DBA_LOCKS
*/
create or replace view DBA_DDL_LOCKS as
select s.sid session_id,
substr(ob.kglnaown,1,30) owner,
substr(ob.kglnaobj,1,30) name,
decode(ob.kglhdnsp, 0, 'Cursor', 1, 'Table/Procedure/Type', 2, 'Body',
3, 'Trigger', 4, 'Index', 5, 'Cluster', 13, 'Java Source',
14, 'Java Resource', 32, 'Java Data', to_char(ob.kglhdnsp)) type,
decode(lk.kgllkmod, 0, 'None', 1, 'Null', 2, 'Share', 3, 'Exclusive',
'Unknown') mode_held,
decode(lk.kgllkreq, 0, 'None', 1, 'Null', 2, 'Share', 3, 'Exclusive',
'Unknown') mode_requested
from v$session s, x$kglob ob, x$kgllk lk
where lk.kgllkhdl = ob.kglhdadr
and lk.kgllkuse = s.saddr
and ob.kglhdnsp != 0;
create or replace public synonym DBA_DDL_LOCKS for DBA_DDL_LOCKS;
grant select on DBA_DDL_LOCKS to select_catalog_role;
/*
* Show all the sessions waiting for locks and the session that holds the
* lock.
*/
create or replace view DBA_WAITERS
(waiting_session
,holding_session
,lock_type
,mode_held
,mode_requested
,lock_id1
,lock_id2)
as
select /*+ordered */ w.sid
,s.ksusenum
,decode(r.ksqrsidt,
'MR', 'Media Recovery',
'RT', 'Redo Thread',
'UN', 'User Name',
'TX', 'Transaction',
'TM', 'DML',
'UL', 'PL/SQL User Lock',
'DX', 'Distributed Xaction',
'CF', 'Control File',
'IS', 'Instance State',
'FS', 'File Set',
'IR', 'Instance Recovery',
'ST', 'Disk Space Transaction',
'TS', 'Temp Segment',
'IV', 'Library Cache Invalidation',
'LS', 'Log Start or Switch',
'RW', 'Row Wait',
'SQ', 'Sequence Number',
'TE', 'Extend Table',
'TT', 'Temp Table',
r.ksqrsidt)
,decode(l.lmode,
0, 'None', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
l.lmode)
,decode(bitand(w.p1,65535),
0, 'None', /* Mon Lock equivalent */
1, 'Null', /* N */
2, 'Row-S (SS)', /* L */
3, 'Row-X (SX)', /* R */
4, 'Share', /* S */
5, 'S/Row-X (SSX)', /* C */
6, 'Exclusive', /* X */
to_char(bitand(w.p1,65535)))
,r.ksqrsid1, r.ksqrsid2
from v$session_wait w, x$ksqrs r, v$_lock l, x$ksuse s
where w.wait_Time = 0
and w.event like 'enq:%'
and r.ksqrsid1 = w.p2
and r.ksqrsid2 = w.p3
and r.ksqrsidt = chr(bitand(p1,-16777216)/16777215)||
chr(bitand(p1,16711680)/65535)
and l.block = 1
and l.saddr = s.addr
and l.raddr = r.addr
and s.inst_id = userenv('Instance');
create or replace public synonym DBA_WAITERS for DBA_WAITERS;
grant select on DBA_WAITERS to select_catalog_role;
/*
* Show all the sessions that have someone waiting on a lock they hold, but
* that are not themselves waiting on a lock.
*/
create or replace view DBA_BLOCKERS as
select /*+ordered */ distinct s.ksusenum holding_session
from v$session_wait w, x$ksqrs r, v$_lock l, x$ksuse s
where w.wait_Time = 0
and w.event like 'enq:%'
and r.ksqrsid1 = w.p2
and r.ksqrsid2 = w.p3
and r.ksqrsidt = chr(bitand(p1,-16777216)/16777215)||
chr(bitand(p1,16711680)/65535)
and l.block = 1
and l.saddr = s.addr
and l.raddr = r.addr
and s.inst_id = userenv('Instance');
create or replace public synonym DBA_BLOCKERS for DBA_BLOCKERS;
grant select on DBA_BLOCKERS to select_catalog_role;
-- The End --