SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


The OUTPUT clause and T-SQL Syntax


The OUTPUT clause and T-SQL Syntax

Author
Message
kapil_kk
kapil_kk
Hall of Fame
Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)Hall of Fame (3.1K reputation)

Group: General Forum Members
Points: 3123 Visits: 2766
Hugo Kornelis (7/23/2013)
kapil_kk (7/23/2013)
Hugo Kornelis (7/23/2013)
kapil_kk (7/23/2013)
Can someone please throw more light on this statement-
DML statement cannot have any enabled triggers if the statement contains an OUTPUT clause without INTO clause

Which part of the statement do you not understand?

Hi Hugo,
I am not getting by the statement part -
DML statement cannot have any enabled triggers..............

Ah, now I see the confusion. That looks as if a few words were cut off at the start (triggers are created for tables and views, not for statements. so I suspect that this sentence should have started with "The target of the DML statement ...
Or we can go with the explanation in Books Online:
"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".

In other words - if the statement causes a trigger to fire, it should have either no OUTPUT clause or an OUTPUT clause with an INTO keyword. Using the OUTPUT clause without INTO (so that the results of the OUTPUT specification go to the client) is not allowed when a trigger fires.

Thanks a lot Hugo.....
Learn new thing today :-)

_______________________________________________________________
To get quick answer follow this link:
http://www.sqlservercentral.com/articles/Best+Practices/61537/
Danny Ocean
Danny Ocean
SSCommitted
SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)

Group: General Forum Members
Points: 1650 Visits: 1549
Hugo Kornelis (7/23/2013)
...
In other words - if the statement causes a trigger to fire, it should have either no OUTPUT clause or an OUTPUT clause with an INTO keyword. Using the OUTPUT clause without INTO (so that the results of the OUTPUT specification go to the client) is not allowed when a trigger fires.


Thanks hugo for simple explanation.:-)

Thanks
Vinay Kumar
-----------------------------------------------------------------
Keep Learning - Keep Growing !!!
www.GrowWithSql.com
Dana Medley
Dana Medley
SSCrazy
SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)

Group: General Forum Members
Points: 2512 Visits: 1696
Danny Ocean (7/23/2013)
Hugo Kornelis (7/23/2013)
...
In other words - if the statement causes a trigger to fire, it should have either no OUTPUT clause or an OUTPUT clause with an INTO keyword. Using the OUTPUT clause without INTO (so that the results of the OUTPUT specification go to the client) is not allowed when a trigger fires.


Thanks hugo for simple explanation.:-)


+1 As always, thanks for the question and thank you Hugo for the explanation.



Everything is awesome!
PHYData DBA
PHYData DBA
SSC Eights!
SSC Eights! (935 reputation)SSC Eights! (935 reputation)SSC Eights! (935 reputation)SSC Eights! (935 reputation)SSC Eights! (935 reputation)SSC Eights! (935 reputation)SSC Eights! (935 reputation)SSC Eights! (935 reputation)

Group: General Forum Members
Points: 935 Visits: 537
Great Question and clean code.
Your explanation is very brief but understandable considering the behavior of Triggers. Keep it Super Simple! ;-)
zymos
zymos
Mr or Mrs. 500
Mr or Mrs. 500 (598 reputation)Mr or Mrs. 500 (598 reputation)Mr or Mrs. 500 (598 reputation)Mr or Mrs. 500 (598 reputation)Mr or Mrs. 500 (598 reputation)Mr or Mrs. 500 (598 reputation)Mr or Mrs. 500 (598 reputation)Mr or Mrs. 500 (598 reputation)

Group: General Forum Members
Points: 598 Visits: 259
Good and tricky question on Output clause and how triggers work.

Thanks. :-)
Ken Wymore
Ken Wymore
SSCertifiable
SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)

Group: General Forum Members
Points: 5095 Visits: 2377
Thanks for the question Pramod. I had never considered how output would work with triggers.
Anipaul
Anipaul
SSCertifiable
SSCertifiable (7.4K reputation)SSCertifiable (7.4K reputation)SSCertifiable (7.4K reputation)SSCertifiable (7.4K reputation)SSCertifiable (7.4K reputation)SSCertifiable (7.4K reputation)SSCertifiable (7.4K reputation)SSCertifiable (7.4K reputation)

Group: General Forum Members
Points: 7409 Visits: 1407
Nice...



Bangla
Bangla
SSCommitted
SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)SSCommitted (1.7K reputation)

Group: General Forum Members
Points: 1701 Visits: 180
Danny Ocean (7/22/2013)
Good question. I learn something new. :-)

Yes...+1
Carlo Romagnano
Carlo Romagnano
SSCertifiable
SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)SSCertifiable (5.1K reputation)

Group: General Forum Members
Points: 5051 Visits: 3327
Hugo Kornelis (7/23/2013)
...
In other words - if the statement causes a trigger to fire, it should have either no OUTPUT clause or an OUTPUT clause with an INTO keyword. Using the OUTPUT clause without INTO (so that the results of the OUTPUT specification go to the client) is not allowed when a trigger fires.


The question is WHY?
Technically, I do not see the connection or the hindrance of TRIGGER -> OUTPUT -> INTO.

I run on tuttopodismo
Hugo Kornelis
Hugo Kornelis
SSChampion
SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)SSChampion (11K reputation)

Group: General Forum Members
Points: 11180 Visits: 12004
Carlo Romagnano (7/24/2013)
Hugo Kornelis (7/23/2013)
...
In other words - if the statement causes a trigger to fire, it should have either no OUTPUT clause or an OUTPUT clause with an INTO keyword. Using the OUTPUT clause without INTO (so that the results of the OUTPUT specification go to the client) is not allowed when a trigger fires.


The question is WHY?
Technically, I do not see the connection or the hindrance of TRIGGER -> OUTPUT -> INTO.


<speculation>

OUTPUT without INTO sends data to the client.
A trigger might also send output to the client.

Maybe there were some test cases where the two outputs somehow interfered, and the team decided that fixing it would take too much resources???

</speculation>


Hugo Kornelis, SQL Server MVP
Visit my SQL Server blog: http://sqlblog.com/blogs/hugo_kornelis
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search