Check Contraint question

I have the following check constraint
(isnull(patindex(('%[' + ' ' + char(9) + char(10) + char(13) + ']%'),
1;LicensePlateNumber]),0) = 0)
which works fine, throwing an error if those characters are entered. Is the
re a way to have it not throw an error, but rather just remove the offending
characters if entered? ThanksNo, that's not what a constraint does.
You can perhaps use an instead-of trigger to achieve this functionality.
Conor
"Burma Jones" <somebody@.somedomain.not> wrote in message
news:%23lJiq67cGHA.4892@.TK2MSFTNGP02.phx.gbl...
I have the following check constraint
(isnull(patindex(('%[' + ' ' + char(9) + char(10) + char(13) +
']%'),[LicensePlateNumber]),0) = 0)
which works fine, throwing an error if those characters are entered. Is
there a way to have it not throw an error, but rather just remove the
offending characters if entered? Thanks|||No. Constraints are declarative and do not perform actions. I would
do this kind of thing inthe front end or in the inpout procedure.
Triggers will fire any time the table is touched and work on all rows,
so they can be a bit costly.|||Since this is only a few thousand records, I'm not too worried about the
cost of using a trigger. Can you share an example, even pseudocode, showing
how to create a trigger which will remove those characters? Thanks
"Conor Cunningham [MS]" <conorc_removeme@.online.microsoft.com> wrote in
message news:eu$9uj9cGHA.4932@.TK2MSFTNGP03.phx.gbl...
> No, that's not what a constraint does.
> You can perhaps use an instead-of trigger to achieve this functionality.
> Conor
> "Burma Jones" <somebody@.somedomain.not> wrote in message
> news:%23lJiq67cGHA.4892@.TK2MSFTNGP02.phx.gbl...
> I have the following check constraint
> (isnull(patindex(('%[' + ' ' + char(9) + char(10) + char(13) +
> ']%'),[LicensePlateNumber]),0) = 0)
> which works fine, throwing an error if those characters are entered. Is
> there a way to have it not throw an error, but rather just remove the
> offending characters if entered? Thanks
>|||On Wed, 10 May 2006 08:26:16 -0700, Burma Jones wrote:

>Since this is only a few thousand records, I'm not too worried about the
>cost of using a trigger. Can you share an example, even pseudocode, showin
g
>how to create a trigger which will remove those characters? Thanks
Hi Burma,
Here's a sample trigger that will remove the offending characters
silently:
CREATE TRIGGER YourTrigger
ON YourTable INSTEAD OF INSERT
AS
INSERT INTO YourTable (OtherColumns, LicensePlate)
SELECT OtherColumns,
REPLACE(REPLACE(REPLACE(REPLACE(LicenseP
late, ' ', ''), CHAR(9),
''), CHAR(10), ''), CHAR(13), ''), OtherColumns
FROM inserted
go
(untested - see www.aspfaq.com/5006 if you prefer a tested reply)
Hugo Kornelis, SQL Server MVP