Error handling

Question

Error handling

Sue-651097

Say Hey Kid

Points: 675
More actions
November 10, 2008 at 5:50 am

#94089

hi,
how can i implement an error handler in my sql code?
i have a proc with many different string functions on a text as input parameter.
normally functions are working, but sometimes there is a record with wrong data and then the proc failed.
what i need is an error handling that the proc doesn't fail but delete this record.
i tried transactions, xaxt_abort and try catch in 2008 (but destination server is 2K). although the severity code is only 16, the transaction doesn't work and the statement stops with a failure after the substring.
error code 537 invalid lenght parameter to left or substring function.
begin tran
select substring('xyz',2,-1)
if @@error = 0
commit tran
else
begin
select wrong
rollback tran
delete......
end
thanks in advance,
sue
Susanne

Viewing 5 posts - 1 through 4 (of 4 total)

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steveb. SSC-Forever Points: 46733 More actions · Answer 1

with SQL 2005 you can use TRY CATCH blocks for error handling, put the code for rolling back your changes in the CATCH block

http://msdn.microsoft.com/en-us/library/ms175976.aspx

Sue-651097 Say Hey Kid Points: 675 More actions · Answer 2

thanks.

yes, i know this and i already tried it as i mentioned.

but 1) the desintation server is sql2000 and 2) it doesn'work 😉

it works with example from knowledge base (0 division) but not with my problem.

begin try

begin tran

select LEFT('xyz',-1)

commit tran

end try

begin catch

rollback tran

end catch

Susanne

Grant Fritchey SSC Guru Points: 398815 More actions · Answer 3

You don't really have any options in SQL Server 2000. The best you can do is check after each statement for an error value and use a GO TO to try deal with it. Stinks, but there it is. I wrote an article [/url]on error trapping that includes a bunch of 2000 functionality. It won't help what you're running into, but it will outline what you can do.

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Sue-651097 Say Hey Kid Points: 675 More actions · Answer 4

thanks. i will check out the articel a little later because it is rather long ;))

but is it right that i only can find out that an error occurs and go on with this:

create proc test

@len int

as

select left('hans',@len)

go

declare @err as int

exec @err = test -3

select @err

so i can only check if the procedure failed but not the string funtions?

the problem is that i have a procedure with an insert statement an this insert raises a trigger in which the string functions are (and failed sometimes). how can i check if the trigger has failed?

Susanne