WAITFOR

SQLServerCentral is supported by Red Gate Software Ltd.

Popular Topics

Home

Members

Calendar

Who's On

Home » SQLServerCentral.com » SQLServerCentral.com Announcements » WAITFOR

12 posts, Page 1 of 2

1 2 »»

WAITFOR

Rate Topic

Display Mode

Topic Options

Author

Message

Site Owners

Posted Monday, June 16, 2008 8:53 PM

SSChampion

Group: General Forum Members
Last Login: Friday, May 18, 2007 3:36 PM
Points: 10,040, Visits: 1

Comments posted to this topic are about the item WAITFOR

Post #517982

Jamie Longstreet-481950

Posted Tuesday, June 17, 2008 5:19 AM

SSCrazy

Group: General Forum Members
Last Login: Thursday, May 16, 2013 6:57 PM
Points: 2,440, Visits: 712

WAITFOR
{
DELAY 'time_to_pass'
| TIME 'time_to_execute'
| [ ( receive_statement ) | ( get_conversation_group_statement ) ]
[ , TIMEOUT timeout ]
}

I wondered when I answered the question about the service broker but it wasn't mentioned in the BOL so I figured I was okay.

http://msdn.microsoft.com/en-us/library/ms187331.aspx?n=0

Jamie

Post #518117

Mauve

Posted Tuesday, June 17, 2008 7:21 AM

Ten Centuries

Group: General Forum Members
Last Login: Tuesday, May 07, 2013 7:07 AM
Points: 1,146, Visits: 1,847

I somewhat disagree that a TIMEOUT can be used to end a WAITFOR. It cannot be used independently and is only an optional modifier of the Service Broker message.

(PHB) I think we should build an SQL database. (Dilbert) What color do you want that database? (PHB) I think mauve has the most RAM.

Post #518221

chajere

Posted Tuesday, June 17, 2008 8:52 AM

SSC-Enthusiastic

Group: General Forum Members
Last Login: Monday, December 26, 2011 2:08 PM
Points: 196, Visits: 54

receive_statement

Is a valid RECEIVE statement.
Important:
WAITFOR with a receive_statement is applicable only to Service Broker messages. For more information, see RECEIVE (Transact-SQL).

Post #518330

Ric Sierra

Posted Tuesday, June 17, 2008 9:33 AM

Ten Centuries

Group: General Forum Members
Last Login: 2 days ago @ 11:21 AM
Points: 1,422, Visits: 247

I think so.
Timeout option is not directly related with WAITFOR TSQL is an optional part.

Post #518379

Ric Sierra

Posted Tuesday, June 17, 2008 10:22 AM

Ten Centuries

Group: General Forum Members
Last Login: 2 days ago @ 11:21 AM
Points: 1,422, Visits: 247

I agree.
Timeout is an optional syntax of WAITFOR TSQL command

Post #518414

john.arnott

Posted Tuesday, June 17, 2008 2:06 PM

UDP Broadcaster

Group: General Forum Members
Last Login: Wednesday, April 17, 2013 10:57 PM
Points: 1,491, Visits: 3,008

This is a good QOD in that it prompted a careful reading of the syntax of an unfamiliar (to me, anyway) feature. The keywords "DELAY", "TIME", and "TIMEOUT" all sound so much like the same sort of thing that I had to read the definition of those terms two or three times. Let's see if I've got them straight now:

-- DELAY lets you specify an interval to wait after the WAITFOR statement is encountered before the rest of the SQL is executed.
-- TIME is an alternative to DELAY in that it lets you specify a specific time of day at which you want your SQL to continue to execute.
-- TIMEOUT gives you a safety net if you're waiting for a Service Broker message. Execution proceeds if the message hasn't arrived within the time you're willing to wait for it.

So, yes, all four options are correct answers as to what will terminate a WAITFOR, allowing the rest of the SQL to continue.

Post #518561

Anipaul

Posted Wednesday, June 18, 2008 6:21 AM

SSCarpal Tunnel

Group: General Forum Members
Last Login: Thursday, May 16, 2013 2:50 AM
Points: 4,785, Visits: 1,334

Nice question.............:)

Post #518923

Christian Buettner-167247

Posted Thursday, June 19, 2008 12:52 AM

SSCrazy

Group: General Forum Members
Last Login: Thursday, May 16, 2013 3:36 AM
Points: 2,522, Visits: 3,616

I also missed that one because of the TIMEOUT. But re-reading the question revealed that the question writer had this in mind when choosing his wording.
Tricky Smile

Best Regards,
Chris Büttner

Post #519623

L' Eomot Inversé

Posted Thursday, December 23, 2010 4:00 PM

SSCertifiable

Group: General Forum Members
Last Login: Today @ 2:57 PM
Points: 7,079, Visits: 7,121

Mauve (6/17/2008)

I somewhat disagree that a TIMEOUT can be used to end a WAITFOR. It cannot be used independently and is only an optional modifier of the Service Broker message.

I agree with Mauve, you can wait for a message or you can wait for whichever comes first, a message of a timeout, but you can't wait for just a timeout.

Tom
Que conclure à la fin de tous mes longs propos? C'est que les préjugés sont la raison des sots. (Voltaire, 1756)

Post #1038968

« Prev Topic | Next Topic »

12 posts, Page 1 of 2

1 2 »»

Permissions