Comments on: SQL SERVER – Delay Function – WAITFOR clause – Delay Execution of Commands

By: anuradha

anuradha — Thu, 21 Apr 2011 20:05:52 +0000

Hi,

I am kind-of new to SQL server and having trouble with a stored procedure with a query timeout set to 9secs.

when i use the following sp,
CREATE PROCEDURE Sleepy @sleep INT AS
BEGIN
DECLARE @now DATETIME;
DECLARE @end DATETIME;
SET @now = SYSDATETIME();
SET @end = DATEADD(S, @sleep, @now);
WHILE (@now < @end)
SET @now = SYSDATETIME();
END;

i do not see a timeout , even tho' the sleepy is passed 10 secs.the sp completed execution wwithout interruption

However when i use "WAITFOR DELAY" in sp….
in 9 secs i get a timeout.

It is not clear , why in the first case, i am not receiving a timeout whereas the second case throws a query timeout exception as expected.

Please clarify

By: Ritish

Ritish — Thu, 23 Dec 2010 09:02:38 +0000

Hi,
I read your blogs and find very usefull in solving the problrms releated to sql queries. My problem is that I have a stored procedure and when I execute it first time it take a lot of time vene up to 5-10 minutes.But second time it execute within 1 minutes. But if I execute some other query after its excution or execute the procedures after an interval it again take a long time to execute. Can u please suggest what I have to do to stop this long interval during execution?

By: Andik Laksono

Andik Laksono — Tue, 24 Nov 2009 12:41:08 +0000

Wow , it’s work Man !!!

thanks a lot

By: Anas

Anas — Fri, 11 Sep 2009 07:47:50 +0000

Thanks for the enlightenment, it’s fix my problem…

By: Dharmender Kumar

Dharmender Kumar — Tue, 05 May 2009 13:42:02 +0000

Thanks to give this solution. Thankyou so much!!

By: Rama

Rama — Sat, 14 Feb 2009 00:20:55 +0000

Thanks for the code

By: Tim M.

Tim M. — Mon, 31 Mar 2008 15:53:40 +0000

First, I want to thank you for your blog, I inadvertently read it more than I think I would, it has been a great help.

Question for you though; I have a cursor which performs a number of actions on databases (CBCC CheckDB & Shrinkdatabase) as well as backs them up and zips them.

How would I best use a waitfor command (SQL 2000) to make sure the steps aren’t overlapping or leapfrogging the other? A time based variable may just cause more problems as far as I can see (may be too long or too short), so is this possible or am I barking up the wrong tree?

Thanks

Tim M

By: MoSaB

MoSaB — Wed, 02 Jan 2008 07:07:28 +0000

verry interesting,

but as I know that this ‘waitfor delay’ will only block for the current session, so the sql server will process other requests for other sessions even if the delay interval doesn’t finish yet.

can you verify that, please ?
Thanks,
Mosab