Error Handling With Try/catch
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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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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Apr 21, 2006
1) We are writing a custome Source component for Oracle with OCI calls, Could some one please let me know how to Enable Error Handling for the Same,
2) Is it possible to write Custome Error Handeling Component for SSIS? if yes could you please help me on how to write it.
Thanks in advance.
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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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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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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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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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Jul 20, 2005
Hi All,I want to catch the next MSSQL error in my SQL code with following continuecalculationsServer: Msg 17, Level 16, State 1, Line 1SQL Server does not exist or access denied.If REMOTE_SERVER_1 is inaccessible (as in (a) below) the executing of SQLwill not continue with (b) - I need the code in (b) to run despite whetherthe previous exec was successful or not - Any ideas?begin transaction(a) exec REMOTE_SERVER_1...bankinsert '1' , '1' , 1 , 0 , 0(b) print @@errorcommit transactionwhere REMOTE_SERVER_1 is link to server created byEXEC sp_addlinkedserver @server = 'REMOTE_SERVER_1', @srvproduct = '',@provider = 'SQLOLEDB', @datasrc = 'MYCOMP1', @catalog = 'mirror2'EXEC sp_addlinkedsrvlogin @rmtsrvname = 'REMOTE_SERVER_1', .....Exec sp_serveroption 'REMOTE_SERVER_1', 'data access', 'true'Exec sp_serveroption 'REMOTE_SERVER_1', 'rpc', 'true'Exec sp_serveroption 'REMOTE_SERVER_1', 'rpc out', 'true'Exec sp_serveroption 'REMOTE_SERVER_1', 'collation compatible', 'true'Any help will be greatly appreciated
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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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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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Nov 1, 1999
Hello,
I would like to supress an Informational error that SQL is returning when I run a stored proc that I created. The error message returned is:
Warning: Null value eliminated from aggregate.
The values returned from the stored proc are the results from a 'select * from #tmp_tbl". Before returning the values, I simply create the temp table, populate it and then run the select statement. Prior to getting my results, I get the error message. Can I suppress it and how?
Thank you.
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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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Apr 16, 2008
Hi there,
Can anyone help me in catching @@error value.
I have a stored procedure which return @@error value, I need to read that in my dataaccesslayer and act according to it.
how do I catch the return value from stored procedure in my dataaccesslayer.
if I am not wrong @@error return a bool value
Thanks in advance.
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May 1, 2008
dear friends i am writng a store procedure to insert into a two table .table 1 data inserted but when i inserting into a table2 it have some error at that time table 1 data also want to delete.give suggestions
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Mar 14, 2000
I am writing a stored procedure that loads transaction logs to a database and I am having trouble trapping meaningful error messages. When ever the load fails, it gives me two error messages, the first one is meaningful and the second one just states that the load ended abnormally. Unforunately, when I capture the error using @@error after the load statement, it is the second error message that I am getting.
Is there anyway to trap the first error message as well?
Thanks
Angela
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Jan 21, 1999
I currently have defined a source server, a transformation, and a destination server using DTS. How and where do I create an error routine that would capture any and all errors that would occur. This would include connection error, transformation errors etc. I know the errors can be written out to a text file but I would like them written to a table on my destination server.
The DTS package will be called from an external program using the xp_cmdshell extended stored procedure. We are using it this way as a flag so if one transformation fails it will return a 1. If all are successful it will return a O. These will be our flags to check the errors table in the destination server.
Could someone tell me where this code is to go and what the code will look like. Samples would be the most help.
Thanks
Tom
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May 21, 2004
is there any way to do sometype of Error handling with in a Stored Proc? Example, If I have a deadlock, can I trap that error and execute other sql code or will always simply kill the stored proc?
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Dec 12, 2006
I have a composite unique key on the audit_hub table that includes TimeStamp, UID, Type, Mailbox all as part of the unique key.
I’m trying to do inserts, and know that in some cases I will violate unique index.
I’m using stored procedure, and want to handle the error gracefully there – just move on.
Reading from text-based log files via .vbs and get back the nasty popup window.
Looks like I have it right but obviously I don’t considering how it’s (not) working.
I thought error handling would be the simplest way to avoid dupe records. Might be necessary to run the same log in more than once, and only want to add the new records since the last insert session.
Here’s what I have. It obviously simply halts and complains immediately after the insert attempt.
ALTER procedure eml_HubInsert
@TimeStamp bigint
,@UID varchar(255)
,@Type varchar(255)
,@MailBox varchar(255)
,@ServerID varchar(50)
as
insert into audit_hub (TimeStamp,UID,Type,Mailbox,ServerID)
values (@TimeStamp,@UID,@Type,@MailBox,@ServerID)
if @@ERROR = 2601
begin
return 0
end
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Jul 25, 1998
Hallo... and sorry about my english
1 question:
What Error-Handling msut i mplement in a trigger, who is updating permanently two tables
in a database (with the follow commands: insert, delete and update) ???
thank you !
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Dec 5, 2005
I have some stored procedures that insert information from a third party plugin that hooks into our database (so I can't do any client side validiation). The problem I am encountering is that some of the fields I use need to be in DateTime format. In order for SQL SERVER 2000 to be able to insert this field, the Date has to be in the correct syntax or an error is thrown.
Is there any way to do something like this in SQL SERVER 2000
Code:
DELCARE @SomeDate DateTime
Try
Set @SomeDate = CONVERT(DateTime, Parameter1, 101)
Catch
return custom error describing what field is formatted
wrong and exit stored procedure
END
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Mar 3, 2005
I am running some bcp copies through a Sql job. I am copying 35 tables in individual steps. However, sometimes the bcp step fails to copy the data, and I want the step to fail if the data is not copied properly. Is that possible? If so, how? Any help is greatly appreciated.
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Mar 8, 2005
I have this stored procedure that I need to add error handling to. How would I do that??
REATE PROCEDURE November2000
AS
SELECT TM#, LASTNAME, FIRSTNAME, FINALSUITDONE
FROM dbo.EmployeeGamingLicense
WHERE (FINALSUITDONE BETWEEN CONVERT(DATETIME,
'2000-11-01 00:00:00', 102) AND CONVERT(DATETIME,
'2000-11-30 00:00:00', 102))
GO
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Feb 2, 2004
ppl,
i wrote this sql, seems v.straightforward to me.
It works first time round, sets the foreigh key, but second time round should error out to the handler - but it just reports the errors to the message out and dosn't seem to fire the errhandler.
Its gotta be a simple mistake - perhaps you could show me.
DECLARE @ErrorMsg int
BEGIN TRANSACTION
ALTER TABLE TPH_GlobalProductHierarchy
ADD CONSTRAINT SalesSubGrp_fk FOREIGN KEY (SalesSubGroupingID)
REFERENCES TPH_SalesSubGrouping (ID)
SET @ErrorMsg =@@ERROR
IF @ErrorMsg <>0 GOTO ErrorHandler
PRINT 'Success'
COMMIT TRANSACTION
ErrorHandler:
IF @ErrorMsg <> 0
BEGIN
PRINT 'Rollback'
ROLLBACK TRANSACTION
END
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Apr 20, 2004
How can i use the system error messages. With RAISERROR
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