[转]ms sql server 存储过程，查看正在执行的sql语句

简介
  大家都知道使用sp_who2这个命令来查看当前正在的执行的SQL语句的spids.但是显示
的信息有限.比如,它只显示执行SELECT,DELETE,UPDATE等.看不到实际的sql命令.

知道正在执行哪条sql语句对于我们debug程序,找出哪些语句花费很长时间,或是哪些语句产生
堵塞来说非常重要.而且这个常用来查看存储过程执行到哪一步.执行到哪个语句.

所以我们需要一个比sp_who2更好的命令来做这些工作.
这个命令使用SQL的动态管理视图 Dynamic Management Views (DMVs).所以只用执行在SQL2005或是
更高的版本上.

返回字段简介:

CREATE PROC [dbo].[dba_WhatSQLIsExecuting]
AS
/*--------------------------------------------------------------------
Purpose: Shows what individual SQL statements are currently executing.
----------------------------------------------------------------------
Parameters: None.
Revision History:
24/07/2008 Ian_Stirk@yahoo.com Initial version
Example Usage:
1. exec YourServerName.master.dbo.dba_WhatSQLIsExecuting
---------------------------------------------------------------------*/
BEGIN
-- Do not lock anything, and do not get held up by any locks.
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED

-- What SQL Statements Are Currently Running?
SELECT [Spid] = session_Id
, ecid
, [Database] = DB_NAME(sp.dbid)
, [User] = nt_username
, [Status] = er.status
, [Wait] = wait_type
, [Individual Query] = SUBSTRING (qt.text,
er.statement_start_offset/2,
(CASE WHEN er.statement_end_offset = -1
THEN LEN(CONVERT(NVARCHAR(MAX), qt.text)) * 2
ELSE er.statement_end_offset END -
er.statement_start_offset)/2)
,[Parent Query] = qt.text
, Program = program_name
, Hostname
, nt_domain
, start_time
FROM sys.dm_exec_requests er
INNER JOIN sys.sysprocesses sp ON er.session_id = sp.spid
CROSS APPLY sys.dm_exec_sql_text(er.sql_handle)as qt
WHERE session_Id > 50 -- Ignore system spids.
AND session_Id NOT IN (@@SPID) -- Ignore this current statement.
ORDER BY 1, 2
END

from http://www.diybl.com/course/7_databases/sql/sqlServer/20090520/167430.html