Solved

Help with possible infinite looping triggers

Posted on 2008-06-09
3
252 Views
Last Modified: 2008-06-16
Hi,

I have 2 store databases (retail & wholesale), each database contains the same tables and structure but most with different data. There are several tables that will contain the same information such as products, productOptions, categories, etc.

I have two seperate web apps for updating each database. Each page contains several forms for updating the various tables and submits to an execute page that carries out the updates.

I have created (with help from expert SIMONET) a trigger that will update/insert/delete the wholesale database after the retail one has been updated thru the web app.

Everything works great until I try to create the same type of triggers for the wholesale database (to perform the updates on the retail database).

I think I have created a infinite loop of triggers. I am not really sure because the error is:

 [DBNETLIB][ConnectionRead (recv()).]General network error. Check your network documentation.

But it seems logical that the trigger are acting on each other.

Can anyone help to solve this situation? Here is the trigger code:
USE [jcpascu_retailDEV]

GO

 

create trigger [jcpascu_admin].[tr_products]

   on [jcpascu_admin].[products]

   after Insert,Update,Delete

as

 

begin

  

   declare @InsertedCount int

   declare @DeletedCount int

   set @InsertedCount = (select count(*) from inserted)

   set @DeletedCount = (select count(*) from deleted)

 

   if @InsertedCount > 0 begin

      -- first do updated rows

      if @DeletedCount > 0 begin

         update [jcpascu_wholesaleDEV].[jcpascu_admin].[products]

           set price = A.price,

           noShipCharge = A.noShipCharge,

           fileName = A.fileName,

           homepage = A.homepage,

           smallImageUrl = A.smallImageUrl,

           listPrice = A.listPrice,

           sku = A.sku,

           relatedKeys = A.relatedKeys,

           details = A.details,

           descriptionLong = A.descriptionLong,

           description = A.description,

           imageUrl = A.imageUrl,

           reviewAllow = A.reviewAllow,

           stock = A.stock,

           weight = A.weight,

           reviewAutoActive = A.reviewAutoActive,

           refurbished = A.refurbished,

           msrp = A.msrp,

           handlingfee = A.handlingfee,

           AltImageURL = A.AltImageURL,

           Freight = A.Freight,

           active = A.active,

           supplier = A.supplier,

           sortOrder = A.sortOrder,

           taxExempt = A.taxExempt,

           UPC = A.UPC,

           minqty = A.minqty,

           idBrand = A.idBrand,

           hotDeal = A.hotDeal,

           idManufacturer = A.idManufacturer,

           mpn = A.mpn,

           wholesaleprice = A.wholesaleprice,

           map = A.map,

           estimatedship = A.estimatedship,

           XLrgImageURL = A.XLrgImageURL

         FROM Inserted A

         WHERE A.idProduct in (select [idProduct] from deleted) and ([jcpascu_wholesaleDEV].[jcpascu_admin].[products].idProduct = A.idProduct)

      end

      else

      begin

          -- now do inserted rows

          SET IDENTITY_INSERT [jcpascu_wholesaleDEV].[jcpascu_admin].[products] ON

          INSERT INTO [jcpascu_wholesaleDEV].[jcpascu_admin].[products]

           ([idProduct],price,noShipCharge,fileName,homepage,

           smallImageUrl,listPrice,sku,relatedKeys,

           details,descriptionLong,description,imageUrl,

           reviewAllow,stock,weight,reviewAutoActive,

           refurbished,msrp,handlingfee,AltImageURL,Freight,

           active,supplier,sortOrder,taxExempt,UPC,minqty,

           idBrand,hotDeal,idManufacturer,mpn,

           wholesaleprice,map,estimatedship,XLrgImageURL)

           select [idProduct],price,noShipCharge,fileName,homepage,

           smallImageUrl,listPrice,sku,relatedKeys,

           details,descriptionLong,description,imageUrl,

           reviewAllow,stock,weight,reviewAutoActive,

           refurbished,msrp,handlingfee,AltImageURL,Freight,

           active,supplier,sortOrder,taxExempt,UPC,minqty,

           idBrand,hotDeal,idManufacturer,mpn,

           wholesaleprice,map,estimatedship,XLrgImageURL

          FROM Inserted

          SET IDENTITY_INSERT [jcpascu_wholesaleDEV].[jcpascu_admin].[products] OFF

      end

 end

    else

          -- now do deleted rows

          if @DeletedCount > 0  begin

            DELETE FROM [jcpascu_wholesaleDEV].[jcpascu_admin].[products] 

            WHERE idProduct IN (SELECT idProduct FROM deleted)

          end

end

Open in new window

0
Comment
Question by:ChristinaPupo
  • 2
3 Comments
 
LVL 1

Expert Comment

by:sqlconsumer
ID: 21749352
Do you have the code for the trigger on the Wholesale database? or is it exactly the same? appart from the database scope.

What you have describe is indirect recursion also referred to as nested triggers.

By setting the NESTED TRIGGERS option to 0 at the server level, you can disable all forms of nested trigger.
0
 

Author Comment

by:ChristinaPupo
ID: 21757837
The code for the wholesale triggers are the same except that they update the retail database instead. I don't think I have the option of changing the nested triggers option to 0 because I am on a shared SQL server and do not have access to most of the settings. Can you elaborate on how to do this so I can be sure? Isn't there any way of changing the trigger code to not act on each other? I have tried some variations of code using IF THEN statements and/or IF NOT UPDATE but these are the first triggers I've ever worked with and can't seem to get anything to work

You help is greatly appreciated..
0
 
LVL 1

Accepted Solution

by:
sqlconsumer earned 500 total points
ID: 21767450
sp_configure 'nested trigers', 0;
GO

Will turn off nested triggers.

The alternative is to create a third table that has a trigger. When records are added to this table you can decide whether to apply the new record to the wholesale and retail tables.

Hope this helps
0

Featured Post

Free Trending Threat Insights Every Day

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
Problem with SqlConnection 5 121
Select2 jquery help 9 46
SQL Server 2012 Row Selection 2 30
Stored procedure 23 24
If you don't have the right permissions set for your WordPress location in IIS, you won't be able to perform automatic updates. Here's how to fix the problem.
Slowly Changing Dimension Transformation component in data task flow is very useful for us to manage and control how data changes in SSIS.
Viewers will learn how to use the SELECT statement in SQL to return specific rows and columns, with various degrees of sorting and limits in place.
Use Wufoo, an online form creation tool, to make powerful forms. Learn how to choose which pages of your form are visible to your users based on their inputs. The page rules feature provides you with an opportunity to create if:then statements for y…

747 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now