得到SQLServer当前运行的语句

SP_WHO2是一个比较流行的SQL查看运行状态的函数，但是它有比较多的限制，比如我们只能看到命令类型，而不能查看具体内容，本文介绍的方法可以破除这种限制。

运行的效果如下：

原理分析

    我们可以从sys.dm_exec_requests视图中读取正在运行的请求，以及这个请求的句柄(sql_handle),通过句柄，可以从sys.dm_exec_sql_text得到请求的具体内容。同时，通过(SPID)联接sys.processes这个表，可以得到运行语句的用户、数据库、及应用程序名，所有的字段都在下表中列了出来：

Column name	Data type	Description
spid	smallint	SQL Server process ID.
ecid	smallint	Execution context ID used to uniquely identify the subthreads operating on behalf of a single process.
dbid	smallint	ID of the database currently being used by the process.
nt_username	nchar(128)	Windows user name for the process, if using Windows Authentication, or a trusted connection.
status	nchar(30)	Process ID status. For example, running and sleeping.
wait_type	bigint	Current wait time in milliseconds.
Individual Query	varchar	SQL Statement currently running.
Parent Query	varchar	Routine that contains the Individual Query.
program_name	nchar(128)	Name of the application program.
Hostname	nchar(128)	Name of the workstation.
nt_domain	nchar(128)	Microsoft Windows domain for the client, if using Windows Authentication, or a trusted connection.
Start_time	datetime	Time when the request is scheduled to run.

最后的SQL语句如下：

 

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

   

原文地址：http://www.sqlservercentral.com/articles/DMV/64425/