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HomeDatabaseMysql Tutorial使用SQLServer Audit来监控触发器的启用、禁用情况

使用情景: 有时候会发现在触发器中的业务逻辑没有执行,可能是因为触发器的逻辑错误所引起的。但是有时候却是因为一些触发器被禁用了。 由于 SQLServer 默认不跟踪触发器的启用还是禁用。且禁用触发器的命令( Disable Trigger )不在默认跟踪里面捕获。但

 使用情景:      

       有时候会发现在触发器中的业务逻辑没有执行,可能是因为触发器的逻辑错误所引起的。但是有时候却是因为一些触发器被禁用了。

 

       由于SQLServer默认不跟踪触发器的启用还是禁用。且禁用触发器的命令(Disable Trigger)不在默认跟踪里面捕获。但是可以在服务器级别的跟踪(不是使用Profiler)获取这些信息,捕获SQL:StmtCompleted并在TextData列筛选,但是对于负载较重的系统,这样会有比较大的影响。

 

       如果你的是企业版,可以考虑使用一个新特性:SQL Server Audit。可以使用DATABASE AUDIT SPECIFICATION来捕获这些事件。

 

使用步骤:

 

第一步,使用以下语句先创建服务器级别监控:

 

USE master;

GO

CREATE SERVER AUDIT ServerAudit

  TO FILE (FILEPATH = 'E:\temp\', MAXSIZE = 1 GB)--注意更改文件路径

  WITH (ON_FAILURE = CONTINUE);

GO

ALTER SERVER AUDIT ServerAudit

  WITH (STATE = ON);

注意,路径需要修改,temp文件夹也要实现开启。

第二步,创建数据库级别监控:

 

 对于本文,我们关注SCHEMA_OBJECT_CHANGE_GROUP,以AdventureWorks为例子:

USE AdventureWorks;
GO
CREATE DATABASE AUDIT SPECIFICATION schema_change
FOR SERVER AUDIT ServerAudit
ADD (SCHEMA_OBJECT_CHANGE_GROUP)
WITH (STATE = ON);
GO


 

 

第三步,创建一个示例表,然后创建一个示例触发器:

 

CREATE TABLE dbo.splunge ( id INT ) ;
GO
CREATE TRIGGER dbo.splunge_trigger ON dbo.splunge
    FOR INSERT
AS
    BEGIN
        SELECT  1 ;
    END
GO


 

 

第四步,可以使用以下脚本来检查:

 

SELECT  event_time ,
        succeeded ,
        server_principal_name ,
        [object_name] ,
        [statement]
FROM    sys.fn_get_audit_file('E:\Temp\ServerAudit*', NULL, NULL)
WHERE   database_name = 'AdventureWorks' ;


 

结果如下,可以看到捕获了创建的记录:

 

使用SQLServer Audit来监控触发器的启用、禁用情况

 

现在来禁用这个触发器,然后再查询一下:

 

DISABLE TRIGGER dbo.splunge_trigger ON dbo.splunge;
GO
SELECT  event_time ,
        succeeded ,
        server_principal_name ,
        [object_name] ,
        [statement]
FROM    sys.fn_get_audit_file('E:\Temp\ServerAudit*', NULL, NULL)
WHERE   database_name = 'AdventureWorks' ;

结果如下:

 

使用SQLServer Audit来监控触发器的启用、禁用情况

如果你重新启用这个触发器,你会再看到另外一行,如果觉得返回数据太多,可以在where语句中添加筛选:

AND [statement] LIKE '%disable%trigger%'

 

     但是有时候会存在误报,比如,在你的代码里面可能存在同样的信息。但是筛选数据对性能和检查问题总是有好处的。

 

小结:

        捕获事件有很多种方式。此功能仅限2008企业版使用。

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