Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Instead of trigger and table valued function

Posted on 2010-08-31
6
Medium Priority
?
378 Views
Last Modified: 2013-11-07
I am attempting to create a "read" trigger.  My client has an older system that uses select statements to validate userid and passwords.  Now they want to be able to implement an automated lockout after X failed attempts in Y minutes.

My current approach is ot use view based on a table value function to replace the original users table.

The TVF works fine and the account lockout (using a secondary non-enlisted connection) also works fine.

Unfortunately as soon as I starting working on the instead of triggers for update and delete I receive errors.

If I can solve one error the same solution will most likely solve the others as well...

The first error is:
A .NET Framework error occurred during execution of user-defined routine or aggregate "TestUserTable":
"Invalid use of side-effecting or time-dependent operator in 'UPDATE' within a function."

I recieve this when I attempt to execute the following sql:
update usertable set manager='fubar' where loginid='Chris'

at this point in time the update instead of trigger is defined as follows:

create trigger tr_vwUserTable on UserTable
Instead of update
as
begin
 --do nothing for now
   update usertable_old set manager='fubar'

end

My understanding is that instead of triggers execute...well instead of the action...so why am I receiving this obscure error?
0
Comment
Question by:Choran6619
[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
  • 3
  • 3
6 Comments
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 1500 total points
ID: 33569690
>"Invalid use of side-effecting or time-dependent operator in 'UPDATE' within a function.

you cannot use UPDATE, INSERT, DELETE within a function.
exception is when those statements refer to a table variable created within the function.
0
 

Author Comment

by:Choran6619
ID: 33570364
I must not have done a god job explaining the issue:

The select should use the TVF.
The instead of trigger (update or delete) should use the original physical table.


The view is based on the TVF.
the triggers are based on the view.

since the triggers are "Instead of" triggers the update statement should not involve the TVF at all.....
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 33574594
can you show the TVF anyhow, please?
+ the script to create the table + view ... to reproduce the problem here easily
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 

Author Comment

by:Choran6619
ID: 33576834
I'd be more than happy to send you the files, offline, if you have an email that I can use.

I understand why the update is not supported..it requires a delete followed by an insert and the TVF does not support delete.  Without that support the deleted pseudo table can't be build.

Instead I have rolled a different implementation using SQLTracer that is working like a champ.
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 33576926
glad you found your solution
0
 

Author Closing Comment

by:Choran6619
ID: 33581218
I prefer solutions that solve the issue..rather than simply restating the error message.
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

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

by Mark Wills Attending one of Rob Farley's seminars the other day, I heard the phrase "The Accidental DBA" and fell in love with it. It got me thinking about the plight of the newcomer to SQL Server...  So if you are the accidental DBA, or, simp…
Occasionally there is a need to clean table columns, especially if you have inherited legacy data. There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…

721 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