Check Referential Ingerity Or Catch Error
Oct 6, 2004
Hi all,
Just wondering what would be the normal or more efficient practice to insert/update a record.
1. Check for existence of primary record (using SELECT in stored procedure)
2. Capture error and handling
My problem is that I try to execute an stored procedure from a VB client.. but unable to capture the errors in SP, it just prompts the error and thats it, not responding to my "SELECT @err = @@ERROR" after the insert statement.
so now, I'm thinking of capturing the error on the client (which I am able to do) and handle it from there.. or to make sure that RI is enforced by 'searching' for Pks in the primary tables before executing the INSERT statement in my stored procedure.
Any advise would be appreciated..
Cyherus
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Feb 15, 2007
Hi,
I'm having trouble with a Script Component in a data flow task. I have code that does a SqlCommand.ExecuteReader() call that throws an 'Object reference not set to an instance of an object' error. Thing is, the SqlCommand.ExecuteReader() call is already inside a Try..Catch block. Essentially I have two questions regarding this error:
a) Why doesn't my Catch block catch the exception?
b) I've made sure that my SqlCommand object and the SqlConnection property that it uses are properly instantiated, and the query is correct. Any ideas on why it is throwing that exception?
Hope someone could help.
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May 2, 2007
We have a stored procedure that calculates the floor nr for users at our company campus using their office location. The calculation is done by a function that returns an integer. Unfortunately, not all users enter their information correctly so the function sometimes raises an error. Below is the code of that stored procedure.
UPDATE PERSONS
SET FLOORNR = dbo.FloorNR(OFFICELOCATION)
WHERE OFFICELOCATION IS NOT NULL
IF(@@ERROR <> 0 OR @@ROWCOUNT = 0)
BEGIN
RAISERROR ('Failed to calculate the floor number', 16, 1 ) with nowait
END
However, when the function dbo.FloorNR fails, it doesn't raise our error, but it seems to raise the error that comes from dbo.FloorNR.
How can we catch errors that come from dbo.FloorNr so that we can raise our own error? Our company still uses SQL 2000, so we cannot use the SQL 2005 try/catch option.
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Aug 21, 2007
Hi,
I have the following stored procedure which is added to the windows scheduler. When it is run I'm getting an "Invalid use of null error", therefore I need to capture and any errors but I'm not sure how to do this. Can someone help?
Thanks.
Code:
CREATE PROCEDURE [dbo].[usp_Reminders] AS
DECLARE @ReminderSent datetime
DECLARE @getRecords CURSOR
DECLARE @err int
SELECT E.[RL Staff No], E.Forename, E.Surname, C.CourseName, V.CourseDate , E.Email, V.ReminderSent
FROM empdetails.dbo.v_Employee E
INNER JOIN Validation V ON E.[RL Staff No] = V.[RL Staff No]
INNER JOIN empdetails.dbo.v_Course C ON V.CourseCode = C.CourseCode
WHERE V.Completed Is Null AND V.ReminderSent Is Null AND V.CourseDate <= dateadd(dd, -3, getdate())
order by e.[rl staff no]
SET @getRecords = CURSOR FOR
SELECT V.ReminderSent
FROM empdetails.dbo.v_Employee E
INNER JOIN Validation V ON E.[RL Staff No] = V.[RL Staff No]
INNER JOIN empdetails.dbo.v_Course C ON V.CourseCode = C.CourseCode
WHERE V.Completed IS NULL AND V.ReminderSent IS NULL AND V.CourseDate <= dateadd(dd, -3, getdate())
ORDER BY e.[rl staff no]
OPEN @getRecords
FETCH NEXT FROM @getRecords INTO @ReminderSent
WHILE @@FETCH_STATUS= 0
BEGIN
UPDATE Validation
SET ReminderSent = GetDate()
WHERE CURRENT OF @getRecords
FETCH NEXT FROM @getRecords INTO @ReminderSent
END
CLOSE @getRecords
DEALLOCATE @getRecords
GO
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Jul 20, 2005
Hi everyone, I am using an SQL extended stored procedure to send emails in aDTS package using a cursor that goes through each row in a table.Email sending code below======================exec master.dbo.xp_smtp_sendmail@FROM = @sFrom,@FROM_NAME = @sFrom,@TO = @sRecepients,@subject = @sSubject,@message = @sBody,@type = N'text/html',@codepage = 0,@server =N'MYMAILSERVER'======================Fetch Next From EmailCursor ...Now the problem I have is that if an individual email address in invalidthen an error occurs and the whole DTS package falls over. What I would liketo be able to do is "catch the error", something like this (C# code used asexample)try{exec master.dbo.xp_smtp_sendmail@FROM = @sFrom,@FROM_NAME = @sFrom,@TO = @sRecepients,@subject = @sSubject,@message = @sBody,@type = N'text/html',@codepage = 0,@server =N'MYMAILSERVER'} catch {exec master.dbo.xp_smtp_sendmail@FROM = "arealaddress@mybusiness.com",@FROM_NAME = @sFrom,@TO = @sRecepients,@subject = @sSubject,@message = @sBody,@type = N'text/html',@codepage = 0,@server =N'MYMAILSERVER'}Is this possible??? Normally I would do all the email validation before theemail is entered into the database but unfortunately, I do not have accessto the application code so I am stuck doing it this way.Thanks in advanceMark
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Feb 6, 2008
Hey,Here's yet another question for you more knowledgeable than me Up to this point I have been using a try/catch statement when dealing with SQL, for exampleint result = 0;try{result = Int32.Parse(command.ExecuteScalar().ToString());}catch{result = 0;}But I read up one some error handling and I have no idea how to solve this anymore. Since I'll be using the catch block to catch exceptions, something like thiscatch (SqlException){throw;}So I was wondering what is the good, standard practice for dealing with this since I need the catch statement to set result to zero or I would end up with an error.Thanks in advance,Sixten
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May 9, 2006
I'm looking for a discussion of the pros and cons of using TRY/CATCH as an error handler in a standard fashion with Stored Procedures. I've been using SQL Server for some time, and am accustomed to an approach of error handling in SPs that returns control from an SP via a common exit routine.
Has anyone defined an approach they would consider sharing? I realize that the reasons for standardizing on an approach includes requirements to your specific situation, so there are likely no perfect answers. I understand the basics of TRY/CATCH in SQL Server. Specifically, I'm looking for an approach where a common "Catch Handler" is used, paying attention to the issues around COMMIT/ROLLBACK.
If there are any threads that discuss this, let me know; I've performed a seach and found nothing so far.
Thanks,
Chuck
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Jan 5, 2005
hello!
im new to sql... what i'm trying to do is catch the error on insert or update statment of sql.. sound simple but please..
this is the sample table design...
tbl_Customer
CustomerID int(4) Primary AutoIncrement
CustomerCode nvarchar(25)
CustomerName nvarchar(25)
..
..
Deleted bit(1)
what i'm trying to do is when a record is deleted, it's not actually deleted
in the table but only marked 1 (true) the Deleted field.. because i don't want
to lose the relationship...
it's easy to do this on insert statement like this..
Create Procedure InsertCustomer(@param1 ....) AS
IF NOT EXIST (SELECT * FROM tbl_Customer WHERE DELETED = 0) THEN
// do insert statement here
ELSE
// Do nothing
GO
this is also easy if i create a index constraints on the table.. but this will violate my design idea..
so anybody can help me to create the procedure in update statement and insert statement
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Mar 8, 2004
hi,
I try to write a function which includes a statement:
SELECT @dateReturn = CAST(@dateString As datetime)
to convert a string to datetime.
When it runs, sometime it will generate :
"The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value."
and all related are terminated.
Can I find a way to catch this error and don't let it terminate the whole thing? For
example, when this happens, I want to get datetime as NULL instead of just being
terminated.
Thanks.
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May 24, 2006
Greetings all,
When an error occurs it is written to a log file (Assuming you have loggin on).
Anyone know of a way to catch the error in a variable?
When an error occurs I send an email explaining where there error happened and to view the logfile. I would like to include the last error in the email. Saves having to go view the log...
Thanks
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Jan 28, 2004
hello,
i am trying to figure out how to check for failure or success AFTER the script task has ran.
its a piece of cake to write script logic that runs before the task but how do i check things and decide to retry AFTER a script task has ran?
i want to check for an error after a large table replication and if it detects that there was an error i want to RETRY.
dts does not seem to have this one specific piece of functionality. am i overlooking something?
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Mar 18, 2008
I am trying to use a simple BEGIN TRY and END TRY in my SP. It is giving a compile time error such as
Line 13: Incorrect syntax near 'try'.
Why is this, can somebody help me out. Yes i am sure it is SQL Server 2005 on my machine.
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Aug 11, 2015
I am new to T-SQL programming. I need to write a main procedures to execute multiple transactions. How could I structure the program so that each transaction will not abort if failed. Instead, the next transaction will keep running. At the very end the procedure will output the error and report them back to the main program in the output parameters. Looking for pseudo code.
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Dec 10, 2007
I was just debugging a stored procedure visual studio and I was surprised with what I was watching.
I'm running SQL 2005 and visual studio 2005. I have a set of nested try/catch blocks.
It fails on the first try and drops into the catch block just as it should. Within the catch block a dynamic sql statement is created. A try block begins and attempts to exec(@sql). It then drops to the catch block. However, I copy the statement into SQL Management Studio and it runs without error everytime.
Why is it dropping into the catch block? Logically it should just complete executing the statement continue without going into the catch block.
Do I have to reset the raiserror values between try blocks or something?
--Thanks--
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Oct 26, 2007
Hi All,
I have the same question and error that Chopaka is getting:
"I have a SQL 2005 job that calls a stored proc. The job step returns the message "Query timeout expired....Message 7412...The step succeeded." The proc never actually ever did anything due to the query timeout, and the job continued on to other steps. I'm going to address the timeout issue eventually, but first I'd like to trap the timeout problem and force the job to end.
It appears that the query timeout isn't really an error, just a message. I've tried TRY-CATCH in the SP but the situation isn't caught, again probably due to the interpretation that it isn't an error."
I have reduced the "Remote Query time out" to 1 sec, in order to catch the error and to prevent the job from running, but the error is not caught.
Is there a way to catch this in the SQL or in the job step to prevent the job from continuing?
This is the script that I'm using without any luck
BEGIN TRY
BEGIN Transaction
Create table #tmpSummaryTable
(
)
insert into #tmpSummaryTable
select * from CDRServer01.iXtemp.dbo.gx_tbFTRSummary_test
COMMIT Transaction
END TRY
BEGIN CATCH
DECLARE @err int
SELECT @err = @@error
PRINT '@@error: ' + ltrim(str(@err))
SELECT ERROR_NUMBER() ERNumber,
ERROR_MESSAGE() Error_Message
ROLLBACK
Return
END CATCH
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Mar 3, 2008
Hello, I have stored procedure that when executed it will check to see if a given name is found in the database, if the name is found, I would like to have it continue on to do its work, however if the name is not found, I would like it to raise an error and then stop execution at that point, however, the way it is currently working is, if the name is not found, it catches the error, raises it and then continues on and tries to do its work, which then it bombs out because it can't. I wasn't sure if there was a way to stop the execution of the procedure in the catch statement. I don't think I want to raise the error level to 20-25 because I don't want to drop the connection to the database per say, I just want to halt execution.
Here is a simple example of what I have:
Code Snippet
begin try
if not exists (select * from sys.database_principals where [name] = 'flea')
raiserror('flea not found', 16, 1)
end try
begin catch
declare @ErrorMessage nvarchar(4000);
declare @ErrorSeverity int;
select
@ErrorMessage = error_message(),
@ErrorSeverity = error_severity();
raiserror(@ErrorMessage, @ErrorSeverity, 1);
end catch
go
begin
print 'hello world'
end
At this point, if the user name (flea) is not found, I don't want it ever to get to the point of 'Hello World', I would like the error raised and the procedure to exit at this point. Any advice would be appreciated on how to best handle my situation!
Thanks,
Flea
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Mar 16, 2007
Using the new referential integrity constraints that will be made available, will it allow us to manually define the relationships between entities even if there is no true foreign key constraints setup in the database?
Lets say we deleted the FK_Orders_Customers in Northwind between orders and customers.
Or is this ability available now?
Thank for your time.
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Nov 29, 2007
Hello everyone,
I have a package that should accomplish the following task:
- Loop on all files in a given directory.
- Before proccessing the current file in the Enumerator, it should be moved to a folder called "importing"
- Load the content of the file into a destination DB.
- After a successfull load, the file is moved from the "importing" to the "success" folder.
- If anything went wrong during the load process, the file should be moved from the "importing" to the "error" folder and an e-mail should be sent out to a certain admin account.
What I have done so far:
My control flow looks like this:
Foreach Loop containing the following tasks:
- File System Task: moving the current file from its original path to the "importing" folder
- Data Flow Task1: performing some transformations and insertions into the DB and raw files.
- Data Flow Task2: performing some transformations and insertions into the DB and raw files.
- Data Flow Task3: performing some transformations and final insertions into the DB.
- File System Task: moving the current file from the "importing" to the "success" folder
Question:
I do not know how to catch the event that one of my three Data Flow Tasks has failed and in this case perform two simple tasks, namely...
- File System Task: moving the current file from the "importing" to the "error" folder
- Send Mail Task: sending a configured e-mail message to a ceratin administrator.
Thanks in advance...
Regards,
Samar
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May 15, 2007
hi all,
All of a sudden my application started crashing when trying execute dml statements on sql server mobile database (sdf file). Frustating thing is that whole application crashes without any error message. this happens for all kinds for DML statement but not all the time. Sometimes it would fail for delete statement such as delete from table; or for insert into statement
my problem catch does not catch the error. There is no way to find out teh what is causing this error
SqlCeConnection sqlcon = new SqlCeConnection("
Data Source = '\Program Files\HISSymbol\HISSymboldb.sdf';"
);
SqlCeCommand sqlcmd = new SqlCeCommand();
sqlcmd.CommandText = Insert into company('AA', 'Lower Plenty Hotel');
sqlcmd.Connection = sqlcon;
SqlCeDataReader sqldr = null;
try
{
sqlcon.Open();
//use nonquery if result is not needed
sqlcmd.ExecuteNonQuery(); // application crashes here
}
catch (Exception e)
{
base.myErrorMsg = e.ToString();
}
finally
{
if (sqlcon != null)
{
if (sqlcon.State != System.Data.ConnectionState.Closed)
sqlcon.Close();
sqlcon.Dispose();
}
}//end of finlally
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Jul 20, 2005
DB-Library Error 10007: General SQL Server error: Check messages fromthe SQLServer.CREATE PROCEDURE [dbo].[spu_Import_Export_Image](@srvr varchar(50),@db varchar(50),@usr varchar(15),@pwd varchar(50),@tbl varchar(50),@col varchar(50),@mod varchar(1),@imgpath1 varchar(1000),@pk varchar(50))ASBEGINdeclare @path varchar(50)declare @whr varchar(200)declare @fil varchar(100)declare @cmd varchar(1000)declare @imgpath varchar(800)declare @ext varchar(5)--declare @pk varchar(50)declare @KeyValue varchar(8000)declare @image varchar(50)--declare @imgpath1 varchar(1000)declare @imgpath2 varchar(1000)declare @sellist varchar(2000)set @path = 'c: extCopy.exe'select @sellist = 'DECLARE curKey CURSOR FOR SELECT ' + @pk +' FROM '+ @tbl + ' ORDER BY ' + @pkexec (@sellist)OPEN curKeyFETCH NEXT FROM curKey INTO @KeyValueWHILE (@@fetch_status = 0)BEGINset @whr = '"where '+ @pk +' = "' + @KeyValueset @fil = @imgpath1 + '' + @KeyValue --+ @extset @cmd = @path + ' /S ' + @srvr + ' /D ' + @db + ' /U ' + @usr+ ' /P ' + @pwd+ ' /T ' + @tbl + ' /C ' + @col + ' /W ' + @whr + '/F ' + @fil+ ' /' + @modexec Master..xp_cmdShell @cmdFETCH NEXT FROM curKey INTO @KeyValueENDCLOSE curKeyDEALLOCATE curKeyENDGOAbove srcipt runs fine with image data type in one table but when irun for some other table it gives me Error MessageTEXTCOPY Version 1.0DB-Library version 8.00.194SQL Server 'WSQL01' Message 170: Line 1: Incorrect syntax near '99'.(Concerning line 1)DB-Library Error 10007: General SQL Server error: Check messages fromthe SQLServer.ERROR: Could not use database 'test1'NULL-----------Aslo it only runs on server console if i run it from workstation uingsame files and tables it gives me an error again. Can anybody help meand reply me at Join Bytes! asap.thnx,dharmesh
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Aug 11, 2001
Question:
What is used to enforce referential integrity ?
Answer: Triggers; Foriegn Keys.
what is Foreign Keys ?
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Oct 17, 2001
How do you enforce referential integrity in SQL between tables?
Thanks.
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Jan 9, 2007
I am new to MS SQL2005 but I have started working with it and found a difference between what MS Access and MS SQL will allow. I have a large DB with many tables but my problem relates to one specific issue. I have a table named tblAreaCodes which holds all area codes for the US. I have another table named tblSupplier where there are multiple colums such as name address etc. and three columns named phac, ph2ac, orderac, and faxac. All are the same type (Int) as is the Primary key in the tblAreaCode table. I have linked each of the columns in the tblSupplier table back to the primary in the tblAreaCode table. All is fine except I can not set the relationship to cascade update or delete. I am unsure what this means or how to proceed since this works and is allowed in MS Access. Any help and or direction would be greatly appreciated.
LKP
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Feb 26, 2008
I used to work with little databases and throw everything into a table with no relation, and modify them all individually. Now I've learned about referential integrity, makes things a lot easier.
My question is, now what? Say I have a Customers table and an Orders table (to keep it simple). If custID is the primary key in customers, foreign key in orders, then if I want to insert into Orders, I need the custID. So those kinds of things I need to keep stored in a session state and insert them like that, correct?
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Oct 26, 2004
Hi guys,
Is there a way of finding the foreign keys for a table and therefore determine weather any referential integrity rules would be broken if a record was deleted?
For example. You have an author you want to delete, but that author has books. You call a procedure to delete the author. The stored procedure checks the foriegn keys, checks the tables and determines what is in them and if any tables have records that would be "orphaned" you return an error reporting what tables have the "would be orphaned" data in them.
It need to be fairly generic int he manner that it checks the foreign keys and the sub table data.
This is on behalf of a guy at work so "requirements" may change. ;)
Anyone got some ideas??
Cheers,
Shaun
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Feb 1, 2008
hi guys,
i was asked to drop some tables...but before dropping i was asked to check for referential integrity..
so where and how can i check this referential integrity????
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Dec 23, 2005
Hihow to set the referential integrity between 2 tables using enterprisemanager (microsoft SQL SERVER).. i tried and the tab doesn't allow meto choose. pls.help.thankssree--chavasreedharMessage posted via http://www.exforsys.com for all your training needs.
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Nov 10, 1998
I'm not sure about the way you enforce the referential integrity in a SQL server 6.5 database (I'm new to this environment). Does any one have an exemple. The doc I have is useless...Thanks
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Jan 18, 2007
I am using SQL server 2000. I have a parent table 'MimeTypes' with primary key 'mimetype'. This is referenced as foreign key in table 'AssetTypes' as column 'BaseMimeType'.
The referential constraint is simple :
alter table AssetTypes
add constraint FK_ASSETTYPES_REF_BASEMIMETYPE foreign key (BaseMimeType)
references MimeTypes (MimeType) on update no action on delete no action;
I have FOR Update trigger on parent table ('MimeTypes') which is as follows:
CREATE TRIGGER trg_MimeTypes_update ON MimeTypes FOR UPDATE
AS
IF UPDATE(MimeType)
BEGIN
UPDATE AssetTypes
SET BaseMimeType = (select MimeType from inserted)
FROM AssetTypes as A
JOIN deleted as d on A.BaseMimeType = d.MimeType
END;
********
The problem is simple. I want to execute a update query on parent table ('MimeTypes') which modifies 'mimetype' value referenced by child. I dont want to include cascade option in constraint.
When such query is executed error comes as : UPDATE statement conflicted with COLUMN REFERENCE constraint 'FK_ASSETTYPES_REF_BASEMIMETYPE'. The conflict occurred in database 'default.db', table 'AssetTypes', column 'BaseMimeType'.
*****
Is there any way to do this?
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Jan 10, 2004
I'm trying out this database layout under MS SQL (de), with primary multicolomn key, but ....
Let's say table A, has primary KEY on the field PK_A
Let's say table B, has primary KEY on the field PK_B
Now table C, has fields ID_A and ID_B, defined as multicolomn primary key, referencing obviuosly to the PK_A and PK_B values.
NOW THE PROBLEM !! :(
Let present you table D , with his beautiful field ID_C. :)
How can I succed in referencing with the ID_C field the primary multicolomn key of table C ??
I' designing the whole thing with access97+mde, but dragging the PK key of table C (ID_A & ID_B) over the table D (ID_C) doesn't work !!
Any help ??
Thanks in advance !!
H2O
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Apr 21, 2008
What ate the method/techniques i can use for enforcing referential integrity, Without using foreign key constraints ?
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Jun 6, 2008
Hi, I tried to delete a record in tblA which has an ID in tblB, i got error msg saying referential problem, please tell me what should i do? thanks.
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Jun 3, 2006
I'm using Microsoft SQL Server Management Studio Express 9.00.2047.00and expriencing problems with setting referential integrity on a linktable. The tables' schema is as follows:-------------------------------------------------------------------CREATE TABLE competencies (CID bigint identity(1,1) CONSTRAINT pk_CID PRIMARY KEY,LockedBy bigint DEFAULT 0 NOT NULLCONSTRAINT fk_UserIDREFERENCES usr_info(userID)ON DELETE SET DEFAULTON UPDATE CASCADE)---------------------------------------------------------CREATE TABLE usr_info (userID bigint IDENTITY(0,1) CONSTRAINT pk_UID PRIMARY KEY,ActiveFlag bit default 0 NOT NULL, --(1='Yes', 0='No')FirstName varchar(100) default '' NOT NULL,LastName varchar(100) default '' NOT NULL)-------------------------------------------------------CREATE TABLE competency_hdr (fkCID bigint default 0 NOT NULLCONSTRAINT fkCID_chREFERENCES competencies(CID)ON DELETE CASCADEON UPDATE CASCADE,ApprovedBy bigint default 0 NOT NULLCONSTRAINT fkUserID_chREFERENCES usr_info(userID)ON DELETE SET DEFAULT -- NO delete if user is deletedON UPDATE CASCADE)--------------------------------------------------------When I execute the above I get the following error message.Msg 1785, Level 16, State 0, Line 1Introducing FOREIGN KEY constraint 'fkUserID_ch' on table'competency_hdr' may cause cycles or multiple cascade paths. SpecifyON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGNKEY constraints.Msg 1750, Level 16, State 0, Line 1Could not create constraint. See previous errors.Now, if i swap the fields around then the error message changes tothat of the fkCID field.Basically what I want is:when I delete a competency record I need all references to this recordto be deleted.when I delete a user I want to set the foreign key to zero (the recordmust remain on the database).Obviously there is something I'm missing here. Any advice, anyone?---------------------------------------------------------------Join Bytes! : Remove your pants to reply---------------------------------------------------------------
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