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:

列名

类型

描述

spid

smallint

SQL Server process ID.

ecid

smallint

Econtext ID

dbid

smallint

数据库ID

nt_username

nchar(128)

用户名

status

nchar(30)

状态

wait_type

bigint

当前等待的 milliseconds.

Individual Query

varchar

当前执行的SQL语句

Parent Query

varchar

上层的SQL语句

program_name

nchar(128)

程序名称

Hostname

nchar(128)

主机名

nt_domain

nchar(128)

域名

Start_time

datetime

开始时间

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

延伸阅读coded by nessus