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MSSQL 2005: Using OUTPUT keyword with table that has triggers

Posted on 2007-07-31
Medium Priority
Last Modified: 2013-11-07
Hi experts,
Here is a citation from MSDN about using OUTPUT for table which has triggers:

"If the OUTPUT clause is specified without also specifying the INTO keyword, the target of the DML operation cannot have any enabled trigger defined on it for the given DML action. For example, if the OUTPUT clause is defined in an UPDATE statement, the target table cannot have any enabled UPDATE triggers."

And here is my problem: I have a table, called MyTable, which has an UPDATE trigger and an INSERT trigger.
When I run an insert query to my table:
                    insert into MyTable OUTPUT inserted.Id values(...)  -- ID is a identity column
I get this error message (of course :-(  ): "The target table 'Resource' of the DML statement cannot have any enabled triggers if the statement contains an OUTPUT clause without INTO clause."

I can work around by re-writing the query:
                    insert into MyTable values(...) select id from MyTable where id = @@identity

However, the "select" version is a little slower than the OUTPUT one.
Could you please tell me there is any way to use OUTPUT in table that has triggers?
Thank you in advance.
Question by:thuannguy
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LVL 143

Accepted Solution

Guy Hengel [angelIII / a3] earned 1500 total points
ID: 19600911
>Could you please tell me there is any way to use OUTPUT in table that has triggers?
as you read by the docs, this is a limitation, where you have no choice than to use the workaround.

note: you should use the scope_identity() instead of @@identity, especially as you have triggers:

insert into MyTable values(...)
select scope_identity() as id

LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 19600916
>However, the "select" version is a little slower than the OUTPUT one.
do you have actually an index on the id field?

Author Comment

ID: 19602006
Yes, I do. I used the MSSQL Profiler to evaluate the performance and saw that it took more READs...
Btw, thank you for your help :)
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 19602104
with my above suggestion, it should generate even less reads :-)

Author Comment

ID: 19602297
yeah, I'll take a try tomorrow :D

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