Hi
I would like to know how can I write a trigger for a table that lists folders deleted. I have a table called RECORDS which contains folders and would like to know folders that are being deleted.
Thanks...
I am reading the WROX "Professional SQL Server 7 Programming" book.
The following code appears on page 424:
CREATE TRIGGER ProductIsRationed
ON Products
FOR UPDATE
AS
IF EXISTS
(
SELECT 'True'
FROM Inserted i
JOIN Deleted d
ON i.ProductID = d.ProductID
WHERE (d.UnitsInStock - i.UnitsInStock) > d.UnitsInStock / 2
AND d.UnitsInStock - i.UnitsInStock > 0
)
BEGIN
RAISERROR('Cannot reduce stock by more than 50%% at once.',16,1)
ROLLBACK TRAN
END
The trigger fires when an UPDATE is made to Products table. The author states that the Inserted and Deleted tables only exist for the life of the trigger, not before, and not after the trigger runs. If this is true, then why would there be any rows in the Deleted table in this case? No rows were
deleted within the trigger. As far as I can see, no rows have been updated
either. If the condition does exist, no rows will be updated, and an error will be displayed. Otherwise, the row will be updated. Then there would be a row in the inserted table. But then the trigger is finished and the inserted table for that trigger disappears. I think my logic is flawed, which is why I am writing. I don't think I fully understand the Inserted and Deleted tables.
Any help would be greatly appreciated.
Nathan
I'm know the above tables are system generated, am I right in assuming the following.
1) The tables are unique to the current user.
2) The tables only last as long as the transaction that caused their creation
Thanks in advance
Alex
I want to compare the before and after values of an UPDATEd column using a trigger. I want to know if the value in the column has changed. Simple? No!
As you know, SqlServer puts the before image of the UPDATEd rows into the DELETED virtual table and the after image of the UPDATEd rows in the INSERTED virtual table.
So you would get the before and after data by doing a SELECT on these tables.
But here is the problem - how do you join the tables? What if there are >1 rows in these 2 tables (because the UPDATE affected >1 rows) - how do i know which "old"/DELETED rows correspond to which "new"/INSERTED?"
Ok - I could join the 2 tables on the primary key, but what if the primary key was updated? In that case the join would not work - the DELETED table would contain the old primary key value and the INSERTED table would contain the new (different) primary key value. In fact, ALL of the columns may have been changed by the UPDATE.
Now, there is another thing to try with triggers - the
IF UPDATE ( <columname> )
test. This is designed to tell you if a specified column was UPDATEd by the last UPDATE. However, this will return TRUE for any UPDATE that mentions the column - even if the UPDATE does not change any data! So I cannot determine whether a certain column has had its value changed with this either.
So then you can try another test mentioned in the docs for CREATE TRIGGER - the
IF COLUMNS_UPDATED()
test. However, this will report that a column has been updated, NOT whether the data has changed as aresult of that UPDATE.
So if you UPDATE the value in the column to the same value as it was beforehand (admittedly, a pointless thing to do, but it could happen in some apps), this fuction will say, yes, this column was updated.
So my question remains - how do I know if the data has changed in a column after an UPDATE, using a trigger?
Any ideas?
I have an interesting problem. I am unable to see any database triggers in the Database Triggers folder under programmability in SQL 2005. I have been able to create and alter triggers in the database that function exactly as their supposed to, yet they never show up as visible in the Triggers folder. I would love for one of the luminaries on this forum to share some wisdom with me and let me know what setting is the culprit. It is driving me batty.
Thank you all in advance.
I would like to wrap the following code in a function and reuse it. Â I use this code in many triggers.
DECLARE @Action as char(1);
SET @Action = (CASE WHEN EXISTS(SELECT * FROM INSERTED) AND EXISTS(SELECT * FROM DELETED)
THEN 'U' Â -- Set Action to Updated.
WHEN EXISTS(SELECT * FROM INSERTED)
THEN 'I' Â -- Set Action to Insert.
WHEN EXISTS(SELECT * FROM DELETED)
THEN 'D' Â -- Set Action to Deleted.
ELSE NULL -- Skip. It may have been a "failed delete". Â Â
END)
Is it possible to write a function and pass the INSERTED and DELETED logical tables to it?
Hello,
Is there an alternative to using FETCH to loop through the Inserted/Delete Tables within a trigger? Does this work?
SELECT * FROM Inserted
BEGIN
if INSERTED.IsActive then ...
END
Would this only see the first record?
Currently I'm doing the following;
AS
DECLARE @JobID INTEGER;
DECLARE @IsActive BIT;
DECLARE Temp CURSOR FOR SELECT JobID, IsActive FROM Inserted;
BEGIN
OPEN Temp;
FETCH NEXT FROM Temp INTO @JobID, @IsActive;
WHILE (@@FETCH_STATUS = 0) BEGIN
if @IsActive then ...
FETCH NEXT FROM Temp INTO @JobID, @IsActive;
END;
CLOSE Temp;
DEALLOCATE Temp;
Is this the best method for looping through the Deleted/Inserted or any other table within a trigger?
Thanks,
Steve
SQL 7 SP2
Are the tables inserted and deleted available from within a sp which is called from a trigger ?
Craig
I need to add the row number or record number to the 'inserted' and 'deleted' tables in a trigger.
Among other things, I have tried-
SELECT 1 as rowId, i.* INTO #ins FROM inserted i
if @@ROWCOUNT > 1 --if multiple rows, set row number
begin
SELECT @pkWhere = coalesce(@pkWhere + ' and ', ' where ') + PKF.colName + ' <= i.' + PKF.colName FROM #primaryKeyFields PKF
set @strSQL = 'update #ins set rowId = (Select Count(*) From #ins i' + @pkWhere + ')'
exec (@strSql)
end
-the above sets rowId for every record to the total instead of sequential. Keep in mind that this code is used to create a trigger for any table, hence I cannot specify any column names literally.
This SHOULD be simple... right?
I created manage update trigger to react on one column changes. There is an application which is working with DB, so I don't have access to SQL query which changes this column. In most cases trigger works fine, but in one case when this column changes, trigger is fired and IsUpdatedColumn is true for this column, but both inserted and deleted table are empty, so I can't get new value for this column. Any idea why is it happened? Is any way around?
This column type is uniqueidentifier. Inserted and deleted tables are empty when application is changing value from NULL to not null value, but if I change it myself from Management Studio inserted table contains right values. Most like problem is in query which is changing that value.
I'm doing that on Sql Server 2005.
I am having a hard time understanding triggers. My goal is to put a trigger on table x where records are UPDATED or DELETED. When this trigger fires I need to take the record ID and put the ID modified record into table y with the date modified. so basically logging the recordid changed with the getDate()
I don't quite understand how to get the rowid of the modified record.
Hi there,Could somebody post some simple example how one can refer toa column in the 'deleted' temporary table within a trigger definition ?Should the 'deleted' and 'inserted' temp tables be declared, or they are'implied' ?I keep having this msg when trying to create a trigger"The column prefix 'deleted' does not match with a table name or alias nameused in the query"Thanks for your inputs,Eddy.
View 2 Replies View RelatedFor some reason in Enterprise Manager for SQL Server 2000, I cannotput the following line into a trigger:select * into #deleted from deletedWhen I hit the Apply button I get the following error:Cannot use text, ntext, or image columns in the 'inserted' or'deleted' tablesThis seems like a weird error, since I am not actually doing anythingto the inserted or deleted tables, I am just trying to make a tempcopy.I have another workaround but I am just curious why this happens.Thanks,Rebecca
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I dont know what I am doing wrong. The trigger (see below) is doing what I want it to do when I do this:
INSERT INTO dbo.personal
(personal_id, chef_id,fornamn, efternamn)
VALUES
(40, 100, 'Malin', 'Markusson' , 'Boss')
but when I remove one value, the result in the logtable is NULL:
INSERT INTO dbo.personal
(personal_id, chef_id,fornamn, efternamn)
VALUES
(40, 100, 'Malin', 'Markusson' )
How can I change the trigger so that it will give me the information of the values that have been updated, inserted or deleted when I dontchange all values (just a couple of them)?
My trigger:
CREATE Trigger trigex
ON dbo.personal
FOR insert, update,delete
AS
INSERT INTO logtable (Innan_värde, Ny_värde)
SELECT
rtrim(cast(d.personal_id as varchar)+', '+cast(d.chef_id as varchar)+', '+rtrim(d.efternamn)+', '+ rtrim(d.fornamn)+ ', '+ rtrim(d.titel)),
(cast(i.personal_id as varchar)+', '+cast(i.chef_id as varchar)+', '+rtrim(i.efternamn)+', '+ rtrim(i.fornamn)+ ' '+ rtrim(i.titel))
FROM inserted i full join deleted d on i.personal_id = d.personal_id
My table:
CREATE Table logtable
(Innan_värde varbinary(max),
Ny_värde varbinary(max))
Thank you !
Does anyone know if it is possible (and if yes, how) to create a trigger that creates a folder for every inserted record?
In a specific root folder, I want a subfolder for every record in the table. How does the trigger have to look like to make the folder automatically with every insert of a new record???
thanks!!
Hi,
I selected create trigger from the tables pop up menu.
I created a trigger for the dbo.sysjobhistory table in the msdb database.
When I click the parse icon it comes back with success.
When I check the trigger folder under the sysjobhistory table the the trigger is not there.
What am I doing wrong?
FYI, here is the trigger code:
CREATE TRIGGER dbo.email_on_job_fail_INSERT
ON dbo.sysjobhistory
FOR INSERT
AS
IF EXISTS (SELECT run_status FROM inserted WHERE run_status = 0 )
BEGIN
DECLARE @cmd VARCHAR(1200)
SET @cmd = (SELECT step_id, step_name, sql_message_id, run_date, run_time, server, message FROM inserted WHERE run_status = 0)
EXEC master.dbo.xp_sendmail
@recipients = 'peterd@bluewolfgroup.com;kashifm@bluewolfgroup.com',
@subject = 'Server Job Failed',
@query = @cmd;
END
GO
Your input is greatly appreciated!
pfd
I've gotten conflicting info about this in the past so I thought I'd try to get clarification.
When a record is deleted, I'm sure it fires the delete trigger. Does it also fire the update trigger?
Thanks
Hi,
I need to prevent modification/update to a field.
So I created a trigger. To take the data from DELETED table then replace the field data.
However, I have problem with one field which data type is text.
MS SQL always return me this error:
Cannot use text, ntext, or image columns in the 'inserted' and 'deleted' tables.
I use the following code to take the data from deleted table
DECLARE @ptrval varbinary(16)
SELECT @ptrval = TEXTPTR(NOTES )
FROM DELETED
I also tried simple Select statement
Select notes from deleted
What code should I use to take the deleted data
Please help.
Thanks in advance
We have an app that uses triggers for auditing. Is there a way to know the order that the records were inserted or deleted? Or maybe a clearer question is.... Can the trigger figure out if it was invoked for a transaction that "inserted and then deleted" a record versus "deleted and then inserted" a record? The order of these is important to our auding.
Thanks!
CB
Hello all,
I have I trigger where I want to insert all _changed_ rows from the INSERTED table into
a table called tempProducts.
If I put this query inside my trigger, I selects exactly the rows I want: rows changed
Code SnippetSELECT * FROM INSERTED
EXCEPT SELECT * FROM DELETED
I the current trigger I have
Code SnippetINSERT INTO dbo.TempProducts (LBTyp, CountryOfOrigin)
SELECT LBTyp, CountryOfOrigin
FROM INSERTED
but this inserts ALL updated rows, not only the changed ones.
So I thought hey, I´ll just combine the two querys and the problem will be solved, like so:
Code Snippet
INSERT INTO dbo.TempProducts (LBTyp, CountryOfOrigin)
SELECT LBTyp, CountryOfOrigin
FROM (SELECT * FROM INSERTED
EXCEPT SELECT * FROM DELETED) as Temp
But for some reason, this won´t work! Why is this? What am I doing wrong?
When i debug a trigger is it possible to add a WATCHon the INSERTED or DELETED?I think not, at least I couldn't figure out a way to do so.Does someone have a suggestion on how I can see the values?I did try to do something likeINSERT INTO TABLE1(NAME)SELECT NAME FROM INSERTEDbut this didn't work. When the trigger completed and Iwent to see the TABLE1, there were no records in it.Are there any documents, web links that describe waysof debugging the trigger's INSERTED and DELETED?Thank you
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I have a question regarding Triggers.
Lets say I want to create a trigger for Insert, Update and Delete action. For each action I do different things.
Now I can create a single trigger for Insert, delete and update, and using counts for inserted and deleted table, take the action appropriately.
Or I can create three different triggers each for Insrt, update and delete.
Which option is better for performance?
Thanks
Hi,
I am trying to figure out which of these option is best suited for auditing. Although each one of them has its own pros/cons.
CLR trigger is easy to write and can be made generic so that it fits for any table required to be audited.
I tried both the option in test database and i found the CLR trigger performed poorly.
Results were :
For table A (3 columns) with TSQL trigger took less than a sec for 2500 sequential inserts.
While table B (3 columns) having same structure with CLR trigger took more than 20 sec for 2500 sequential inserts.
Has anybody done performance comparision of this 2 approaches ?
Please share results if any.
I wanted to validate that is my findings correct so that i select best optimized approach.
Thanks,
Jignesh
I have a table which when certain columns are updated, need a trigger to fire to update a next schedule date in that same table for that record. I can write the trigger, but my question for performance and efficiency is which approach would be better. Separate triggers fo the 8 columns, or a large trigger with an If to check if these columns are updated.
Thanks
am using FOR UPDATE triggers to audit a table that has 67 fields. Myproblem is that this slows down the system significantly. I havenarrowed down the problem to the size (Lines of code) that need to becompiled after the trigger has been fired. There is about 67 IFUpdate(fieldName) inside the trigger and a not very complex selectstatement inside the if followed by an insert to the audit table. WhenI leave only a few IF-s in the trigger and comment the rest of thecode performance increased dramatically. It seems like it is checkingevery single UPdate() statement. Assuming that this was slowing downdue to doing a select for every update i tried to do to seperateselects in the beginning from Deleted and Inserted and assigningcolumns name to specific variables and instead of doingif Update(fieldName) i didif @DelFieldName <> @InsFieldNamebeginINSERT INTO AUDITSELECT WHAT I NEEDENDThis did not improve performance. If you have any ideas on how to getaround this issue please let me know.Below is an example of what my triggers look like.------------------------------------Trigger 1 -- this was my original designCREATE trigger1 on TableFOR UPDATEASif update(field1)begininsert into AuditSELECT What I needENDif update(field2)begininsert into AuditSELECT What I needEND...... Repeated about 65 more timesif update(field67)insert into AuditSELECT What I needEND---------------------------------------------------------------------------Trigger 2 -- this is what i tried but did not improve performanceCREATE trigger2 on TableFOR UPDATEASDeclare @DelField1 varcharDeclare @DelField2 varchar....Declare @DelField67 varcharSelect@DelField1 = Field1,@DelField2 = Field2,....@DelField67 = Field67From DeletedDeclare @InsField1 varcharDeclare @InsField2 varchar....Declare @InsField67 varcharSelect@insField1 = Field1,@insField2 = Field2,....@InsField67 = Field67From Inserted-- I do not do if Update() but instead compare variablesif @DelField1 <> InsField1beginInsert into AUDITSELECT what I needendif @DelField2 <> InsField2beginInsert into AUDITSELECT what I needend............if @DelField67 <> InsField67beginInsert into AUDITSELECT what I needend----------------------------------------------IF you have any idea how to optimize this please let me know. Anyinput is greatly appreciated. I do not have a problem with triggersdoing what they are supposed to, they are very slow this is myconcern. The reason I gave you two examples is because i suspect ithas something to do with the enormouse amount of code inside thetrigger. both examples perform about the same whether i use the twohuge selects from the Inserted and Deleted or not.Thanks,Gent
View 1 Replies View RelatedI have created a trigger to call a program that is written by our program. The program is basically read the record in the table and write to a text file, then delete the record from the table.
The trigger is a after insert trigger. After we added the trigger, we insert a record to the table. The result is that the record still and did not get deleted. Also, the text file didn't get created either. It seems that it take a long time for the record to be written to the table.
But if we just run the program (a exe file), it can write a text file in the folder and delete the record. the trigger is basically:
USE [Zinter]
GO
/****** Object: Trigger [dbo].[ZinterProcess] Script Date: 04/29/2014 18:34:56 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
[Code] ....
I dont alot about sql server 2005(Express edition). For debugging purposes i want to copy the whole app_data folder(.mdf & .log files) on the production server to another folder on the same machine(or sometimes to a network folder). So when i copy and try to paste this App_data folder to a new location, i get this error message
"cannot copy ASPNETDB: it is being used by another person or program. close any programs that might be using the file and try again."
After reading the above message, i close visual web developer, stop the website in IIS and stop the SQLExpress service on the server and try again but still get the same message.
So how can i make sure that all the programs accessing these database files are closed such that i'm able able to copy them to a different location.
I know a WMI event watcher can be used to watch for a new file being added to a folder. However, I need to check for new folders being added to an existing folder. I haven't been able to find a post on doing this. Is there a way in WQL to check for a new folder being added instead of a new file? I've used SQL for years, but am new to SSIS.
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Ok,
I have a network folder called A
I have a SharePoint (2007) Document Library site called B. Web Client is enabled on the server and B is mapped as a Drive (let's call it Y for this discussion)
I want to move documents in A to B. Easy enough, right? Not so....
I first started by creating a batch file that issues a COPY \A \Y /Y at the command prompt. Viola! Worked Great!
I then moved that command to a SQL Agent job as a CMDExec statement (exact same statement) and attempted to run it.....CRASH! It found the files in A but then said "The system cannot find the path specified"
Ok, so I tried it in SSIS. CRASH! Checked the error log. Same thing...
So I then checked the account under which the SQl Agent was running (special domain account for all our SQL Servers). Thinking it might mater I changed it to run under my name (I'm in Domain admin). I also ensured I had permissions to the SPS 2007 library as well. (I did).
Ran again! CRASH! Same error....
So, I created a batch file , placed thec ommand in the batch file and ran that from the command prompt! Viola! Worked Great.
So, I was thinking of how ingenious I was as I pasted my C:RootCopy.bat into my SQL Agent job. With a big grin on my face I right clicked and picked "Start Job at step".......CRASH! Same error.
Does anyone have any ideas on this ???????????????
Thanks,
Stephen
I have a set of folders with the following structure:
MainFolder
1999
SpreadsheetA.xls
SpreadsheetB.xls
SpreadsheetC.xls
2000
SpreadsheetA.xls
SpreadsheetB.xls
SpreadsheetC.xls
etc.
Is there a way that I can use the foreach loop container to loop the sub folders? My plan was to get the folder name and path into a variable, use this to build the connection string for each file in this folder, carry out the upload for that folder, then move onto the next folder and do the same thing, but I cannot see a way to do this.
Thanks,
Sam
I am having problem with moving a file from one folder to another folder. Here is the detailed scenario:
I want to move a input.csv file from shared input folder to shared archive folder. i am using the below code to do this.
declare @inpath varchar(100)
SET @inpath = 'move "\abcdefINPUTinput*.csv" "\abcdefARCHIVEarchive.csv"'
EXEC @filestatus = master..xp_cmdshell @inpath
but the problem was it was cutting the input.csv file from INPUT folder but not pasting it in the ARCHIVE folder.
I really appreciate if anyone can help me to solve this or anyone can tell some workarounds.
Thanks,
This isn€™t an problem as such, it€™s more of a debate.
If a table needs a number of update triggers which do differing tasks, should these triggers be separated out or encapsulated into one all encompassing trigger. Speaking in terms of performance, it doesn€™t make much of an improvement doing either depending upon the tasks performed. I was wondering in terms of maintenance and best practice etc. My view is that if the triggers do totally differing tasks they should be a trigger each on their own.
www.handleysonline.com
Hey,
I'm new to this whole SQL Server 2005 thing as well as database design and I've read up on various ways I can integrate business constraints into my database. I'm not sure which way applies to me, but I could use a helping hand in the right direction.
A quick explanation of the various tables I'm dealing with:
WBS - the Work Breakdown Structure, for example: A - Widget 1, AA - Widget 1 Subsystem 1, and etc.
Impacts - the Risk or Opportunity impacts for the weights of a part/assembly. (See Assemblies have Impacts below)
Allocations - the review of the product in question, say Widget 1, in terms of various weight totals, including all parts. Example - September allocation, Initial Demo allocation, etc. Mostly used for weight history and trending
Parts - There are hundreds of Parts which will eventually lead to thousands. Each part has a WBS element. [Seems redundant, but parts are managed in-house, and WBS elements are cross-company and issued by the Government]
Parts have Allocations - For weight history and trending (see Allocations). Example, Nut 17 can have a September 1st allocation, a September 5th allocation, etc.
Assemblies - Parts are assemblies by themselves and can belong to multiple assemblies. Now, there can be multiple parts on a product, say, an unmanned ground vehicle (UGV), and so those parts can belong to a higher "assembly" [For example, there can be 3 Nut 17's (lower assembly) on Widget 1 Subsystem 2 (higher assembly) and 4 more on Widget 1 Subsystem 5, etc.]. What I'm concerned about is ensuring that the weight roll-ups are accurate for all of the assemblies.
Assemblies have Impacts - There is a risk and opportunity impact setup modeled into this design to allow for a risk or opportunity to be marked on a per-assembly level. That's all this table represents.
A part is allocated a weight and then assigned to an assembly. The Assemblies table holds this hierarchical information - the lower assembly and the higher one, both of which are Parts entries in the [Parts have Allocations] table.
Therefore, to ensure proper weight roll ups in the [Parts have Allocations] table on a per part-basis, I would like to check for any inserts, updates, deletes on both the [Parts have Allocations] table as well as the [Assemblies] table and then re-calculate the weight roll up for every assembly. Now, I'm not sure if this is a huge performance hog, but I do need to keep all the information as up-to-date and as accurate as possible. As such, I'm not sure which method is even correct, although it seems an AFTER DML trigger is in order (from what I've gathered thus far). Keep in mind, this trigger needs to go through and check every WBS or Part and then go through and check all of it's associated assemblies and then ensure the weights are correct by re-summing the weights listed.
If you need the design or create script (table layout), please let me know.
Thanks.