Transaction And Lock--常用的查询事务和锁的语句

--=====================================================
--查看当前运行事务
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED 
SELECT es.session_id, es.login_name, es.host_name, est.text 
, cn.last_read, cn.last_write, es.program_name 
FROM sys.dm_exec_sessions es 
INNER JOIN sys.dm_tran_session_transactions st 
ON es.session_id = st.session_id 
INNER JOIN sys.dm_exec_connections cn 
ON es.session_id = cn.session_id 
CROSS APPLY sys.dm_exec_sql_text(cn.most_recent_sql_handle) est 
LEFT OUTER JOIN sys.dm_exec_requests er                     
ON st.session_id = er.session_id 
AND er.session_id IS NULL        

--=====================================================
--使用SP_WHO和SP_WHO2来查看回话和阻塞
--=====================================================
EXEC SP_WHO
--=====================================================
EXEC SP_WHO2
--=====================================================
SELECT
    SPID                = er.session_id 
    ,STATUS             = ses.STATUS 
    ,[LOGIN]            = ses.login_name 
    ,HOST               = ses.host_name 
    ,BlkBy              = er.blocking_session_id 
    ,DBName             = DB_NAME(er.database_id) 
    ,CommandType        = er.command 
    ,SQLStatement       = st.text 
    ,ObjectName         = OBJECT_NAME(st.objectid) 
    ,ElapsedMS          = er.total_elapsed_time 
    ,CPUTime            = er.cpu_time 
    ,IOReads            = er.logical_reads + er.reads 
    ,IOWrites           = er.writes 
    ,LastWaitType       = er.last_wait_type 
    ,StartTime          = er.start_time 
    ,Protocol           = con.net_transport 
    ,ConnectionWrites   = con.num_writes 
    ,ConnectionReads    = con.num_reads 
    ,ClientAddress      = con.client_net_address 
    ,Authentication     = con.auth_scheme 
FROM sys.dm_exec_requests er 
OUTER APPLY sys.dm_exec_sql_text(er.sql_handle) st 
LEFT JOIN sys.dm_exec_sessions ses 
ON ses.session_id = er.session_id 
LEFT JOIN sys.dm_exec_connections con 
ON con.session_id = ses.session_id 
WHERE er.session_id > 50 
ORDER BY er.blocking_session_id DESC,er.session_id

--====================================================
--使用SP_LOCK来获取锁
--查找某个对象上的锁
DECLARE @T TABLE
(
 SPID BIGINT,
 DataBaseID INT,
 OBJECTID BIGINT,
 IndexID BIGINT,
 LockType VARCHAR(20),
 LockResource NVARCHAR(200),
 LockMode NVARCHAR(20),
 LockStats NVARCHAR(200)
)
INSERT INTO @T
EXEC SP_LOCK
SELECT SPID
,DataBaseID
,DB_NAME(DataBaseID) AS DataBaseName
,OBJECTID
,OBJECT_Name(OBJECTID,DataBaseID) ObjectName
,IndexID
,LockType
,LockResource
,LockMode
,LockStats
FROM @T

--==================================================
--sp_who_lock
USE master
GO
IF EXISTS (SELECT * FROM dbo.sysobjects
     WHERE id = OBJECT_ID(N'[dbo].[sp_who_lock]')
     AND OBJECTPROPERTY(id, N'IsProcedure') = 1
)
DROP PROCEDURE [dbo].[sp_who_lock]
GO
GO
CREATE PROCEDURE sp_who_lock
AS
BEGIN
DECLARE
@spid INT,
@bl INT,
@intTransactionCountOnEntry INT,
@intRowcount INT,
@intCountProperties INT,
@intCounter INT;
 
CREATE TABLE #tmp_lock_who
(
   id INT IDENTITY(1,1),
   SPID SMALLINT,
   bl SMALLINT
)
 
IF @@ERROR<>0 RETURN @@ERROR
 
INSERT INTO #tmp_lock_who(SPID,bl)
SELECT   0 ,blocked
FROM (SELECT * FROM sysprocesses WHERE   blocked>0 ) a
WHERE NOT EXISTS(
   SELECT * FROM
     (
     SELECT * FROM sysprocesses
     WHERE   blocked>0
     ) b
WHERE a.blocked=SPID)
UNION SELECT SPID,blocked
FROM sysprocesses
WHERE   blocked>0
 
IF @@ERROR<>0 RETURN @@ERROR
 
-- 找到临时表的记录数
SELECT @intCountProperties = COUNT(*),@intCounter = 1
FROM #tmp_lock_who
 
IF @@ERROR<>0 RETURN @@ERROR
 
IF @intCountProperties=0
SELECT '现在没有阻塞和死锁信息' AS MESSAGE
 
-- 循环开始
WHILE @intCounter <= @intCountProperties
BEGIN
-- 取第一条记录
SELECT @spid = SPID,@bl = bl
FROM #tmp_lock_who WHERE Id = @intCounter
BEGIN
IF @spid =0
BEGIN
   SELECT '引起数据库死锁的是: '
   + CAST(@bl AS VARCHAR(10))
   + '进程号,其执行的SQL语法如下'
END
ELSE
BEGIN
   SELECT '进程号SPID：'+
   CAST(@spid AS VARCHAR(10))+ '被'
   + '进程号SPID：'+ CAST(@bl AS VARCHAR(10))
   +'阻塞,其当前进程执行的SQL语法如下'
END
DBCC INPUTBUFFER (@bl )
 
END
 
-- 循环指针下移
SET @intCounter = @intCounter + 1
END
 
 
DROP TABLE #tmp_lock_who
 
RETURN 0
END
 
EXEC master.dbo.sp_who_lock
 
--==========================================================
--查看各回话相关的锁
SELECT S.session_id
,DB_NAME(L.resource_database_id) AS resource_database_name
,L.request_type
,L.request_mode
,L.request_status
,L.resource_description
,S.last_request_start_time
,S.last_request_end_time
,S.status
,S.host_name
FROM sys.dm_tran_session_transactions ST
INNER JOIN sys.dm_tran_locks L
ON ST.session_id=L.request_session_id
INNER JOIN sys.dm_exec_sessions S
ON S.session_id=ST.session_id
ORDER BY S.last_request_end_time ASC

--===========================================
--查看数据库上的隐形事务
--由大菠萝(肖磊)提供
SELECT a.session_id,
b.name,
c.client_net_address,
c.client_tcp_port,
b.transaction_begin_time 
FROM sys.dm_tran_session_transactions 
a JOIN sys.dm_tran_active_transactions b 
ON a.transaction_id=b.transaction_id
JOIN sys.dm_exec_connections c(nolock)  
ON a.session_id=c.session_id
WHERE b.name='implicit_transaction' 
AND a.is_user_transaction=1
ORDER BY b.transaction_begin_time