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Query text during caching in SQL 2005


Query text during caching in SQL 2005

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Mattrick
Mattrick
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Great question! Learned something new. Thanks.
jeff.mason
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It is correct to say that removing the GO between the EXEC call and the SELECT against the DMV changes the behavior. Clearly there is some caching going on at least for the duration of the batch itself, and removing it from cache when the batch completes.
Surii
Surii
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Learned something new from the discussion. Thanks guys.
OCTom
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The distribution of answers is almost even. That shows that this was a real brain tickler.
Oleg Netchaev
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Carlo Romagnano (11/14/2010)
In sql2005, I get an error:
"plan_handle" is not a recognized table hints option.

Carlo,

Please check compat level of your SQL Server 2005 AdventureWorks database. If the level is 80 then you should get "plan_handle" is not a recognized table hints option error, but if it is 90 as it should be then the script should run just fine.

Oleg
Carlo Romagnano
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Oleg Netchaev (11/15/2010)
Carlo Romagnano (11/14/2010)
In sql2005, I get an error:
"plan_handle" is not a recognized table hints option.

Carlo,

Please check compat level of your SQL Server 2005 AdventureWorks database. If the level is 80 then you should get "plan_handle" is not a recognized table hints option error, but if it is 90 as it should be then the script should run just fine.

Oleg

I tried at midnight, maybe, my notebook or I was out of order. :-D
Thank you
mojo-168709
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Using the code supplied, I got this result:

-- uspPrintError prints error information about the error that caused -- execution to jump to the CATCH block of a TRY...CATCH construct. -- Should be executed from within the scope of a CATCH block otherwise -- it will return without printing any error information. CREATE PROCEDURE [dbo].[uspPrintError] AS BEGIN SET NOCOUNT ON; -- Print error information. PRINT 'Error ' + CONVERT(varchar(50), ERROR_NUMBER()) + ', Severity ' + CONVERT(varchar(5), ERROR_SEVERITY()) + ', State ' + CONVERT(varchar(5), ERROR_STATE()) + ', Procedure ' + ISNULL(ERROR_PROCEDURE(), '-') + ', Line ' + CONVERT(varchar(5), ERROR_LINE()); PRINT ERROR_MESSAGE(); END;
SELECT st.text QueryText FROM sys.dm_exec_cached_plans CROSS APPLY sys.dm_exec_sql_text(plan_handle) AS st WHERE text LIKE N'%uspPrintError%';


The only way to get the "correct" answer the author intended is to remove the "GO statement between EXEC uspPrintError and the SELECT stmt.

I'm using SQL 2005, compat. level 90.
jeff.mason
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mojo-168709 (11/15/2010)
Using the code supplied, I got this result:

-- uspPrintError prints error information about the error that caused -- execution to jump to the CATCH block of a TRY...CATCH construct. -- Should be executed from within the scope of a CATCH block otherwise -- it will return without printing any error information. CREATE PROCEDURE [dbo].[uspPrintError] AS BEGIN SET NOCOUNT ON; -- Print error information. PRINT 'Error ' + CONVERT(varchar(50), ERROR_NUMBER()) + ', Severity ' + CONVERT(varchar(5), ERROR_SEVERITY()) + ', State ' + CONVERT(varchar(5), ERROR_STATE()) + ', Procedure ' + ISNULL(ERROR_PROCEDURE(), '-') + ', Line ' + CONVERT(varchar(5), ERROR_LINE()); PRINT ERROR_MESSAGE(); END;
SELECT st.text QueryText FROM sys.dm_exec_cached_plans CROSS APPLY sys.dm_exec_sql_text(plan_handle) AS st WHERE text LIKE N'%uspPrintError%';


The only way to get the "correct" answer the author intended is to remove the "GO statement between EXEC uspPrintError and the SELECT stmt.

I'm using SQL 2005, compat. level 90.


I am confused -- the code you posted IS the expected result? CREATE instead of EXEC?
UMG Developer
UMG Developer
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Thaks for the question.
@SQLFRNDZ
@SQLFRNDZ
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EXEC uspPrintError
GO

I know before this thing but I answered it wrong bcoz

EXEC uspPrintError
GO

what this doing over there.


--SQLFRNDZ

Go


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