Solved

Question for vujos

Posted on 2000-04-07
2
247 Views
Last Modified: 2012-05-04
Regarding triggers on system tables, my experience has been as simonsabin says.  I created it but it never fired regardless how i tried.
Please  provide me with the explanation how to create it and have it execute.
0
Comment
Question by:xoxomos
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 1

Accepted Solution

by:
vujos earned 50 total points
ID: 2697150
Hi,

Following is tested on MSSQL 6.5 (did not have time yet to try on 7.0).

But let's start :

1)<enable update on system tables>

sp_configure 'allow update', 1
reconfigure with override

2)<make syslogins table visible in EM>

update sysobjects set sysstat = 99 where name = 'syslogins' and id = 33

3)<add custom message>

sp_addmessage 50009, 16, 'This is my test message'

4)<create trigger for add, upd of login>

CREATE TRIGGER reminder ON syslogins
FOR INSERT, UPDATE AS RAISERROR (50009, 16, 10)
GO

3)<make syslogins invisible in EM>

update sysobjects set sysstat = 113 where name = 'syslogins' and id = 33

4)<disable system tables updates>

sp_configure 'allow update', 0
reconfigure with override

5)<try to add new login from EM or run>

sp_addlogin 'test1', 'testing', 'master', default


Well there you go, you still think that this was easy ?

General comment is still walid : any playing with system tables should be avoided. If you have to, please backup all the databases (you could end up rebuilding your master db - you know what that is). Please do not try above on production system. This is only an demo.

Hope this helps.

0
 

Author Comment

by:xoxomos
ID: 2700889
O.K.  i'll try that and keep in mind not to do it on a production system ---- just yet.  I'm using 6.5 anyhow.
0

Featured Post

Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction SQL Server Integration Services can read XML files, that’s known by every BI developer.  (If you didn’t, don’t worry, I’m aiming this article at newcomers as well.) But how far can you go?  When does the XML Source component become …
Slowly Changing Dimension Transformation component in data task flow is very useful for us to manage and control how data changes in SSIS.
Via a live example, show how to extract information from SQL Server on Database, Connection and Server properties
Via a live example, show how to shrink a transaction log file down to a reasonable size.

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question