what does the second @@error return?

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Home » Article Discussions » Article Discussions by Author » Discuss content posted by wall str33t » what does the second @@error return?

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what does the second @@error return?

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Posted Saturday, April 24, 2010 7:41 PM

Grasshopper

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Last Login: Friday, May 06, 2011 9:33 AM
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Comments posted to this topic are about the item what does the second @@error return?

Post #910074

Posted Monday, April 26, 2010 2:24 AM

Valued Member

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Last Login: Monday, January 24, 2011 6:23 AM
Points: 64, Visits: 29

hi,
the below given set of statements given the same error...

Hehe

Hehe

select 'def'
raiserror('oh no, another error!', 16,1)
select 'xyz'
select @@error

(1 row(s) affected)
Msg 50000, Level 16, State 1, Line 2
oh no, another error!

(1 row(s) affected)

(1 row(s) affected)

Post #910235

Posted Monday, April 26, 2010 4:00 AM

Old Hand

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Last Login: Today @ 10:02 AM
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Did this without query analyser.. and got it right, nice.
Hi wall str33t,

Nice question!

Hi Charles,

Both queries will give the same error, but the question was asking what was returned in the results, not the messages.

The first query when ran by itself will error (you get messages), and the results panel will show two result sets, the first 'abc' , the second the error result set with the error number.

The second query will have three result sets:
'abc'
'xyz'
and 0

Because as wall str33t says the second query executes fine, clears @@error, therefore no error is held in the @@error variable when selected.

Post #910263

Posted Monday, April 26, 2010 4:10 AM

Valued Member

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Last Login: Monday, January 24, 2011 6:23 AM
Points: 64, Visits: 29

hi,

yes correct

i missunderstood the question

means i haven't read the question correctly

Post #910268

Posted Monday, April 26, 2010 5:16 AM

SSChampion

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A question about SQL today! Well done, and thanks.
@@error is a bit less relevant these days (TRY/CATCH) but it's still a good general-knowledge question.

Paul White
SQL Server MVP
SQLblog.com
@SQL_Kiwi

Post #910290

Posted Monday, April 26, 2010 8:14 AM

SSCrazy

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While I see that the answer is correct, I found the question to be confusing, therefore I feel that it was not a good question.

Post #910398

Posted Monday, April 26, 2010 8:19 AM

SSCrazy

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I didn't have to run the code to know the answer, but, what if I did? It still would be a learning experience which is the point of the QotD. I find the negativity against running code to be irritating.

Good question, though. Nicely thought out and very clear as to its intent. Smile

Smile

Post #910405

Posted Monday, April 26, 2010 8:28 AM

SSCrazy

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Good question!

I purposely did not run this in Query Editor, and tried to answer on my own. (I got it right!)

I had to keep in mind that @@ERROR really only applies to the most recent line. From what I saw, SELECT 'XYZ' would not return an error!

Post #910416

Posted Monday, April 26, 2010 8:41 AM

SSCrazy

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Good question. The phrasing could have been more precise, such as what does the second 'select @@error' statement return, but I think that is beside the point and should not be grounds for criticizing the question. I just plain missed that the select 'xyz' statement resets the @@error value to 0, so it was a good exercise in reading code more carefully.

Thanks,
webrunner

-------------------
"The chemistry must be respected." - Walter White

"A SQL query walks into a bar and sees two tables. He walks up to them and says 'Can I join you?'"
Ref.: http://tkyte.blogspot.com/2009/02/sql-joke.html

Post #910429

Posted Monday, April 26, 2010 8:54 AM

SSCoach

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I like the question. Nice job.

Jason AKA CirqueDeSQLeil
I have given a name to my pain...
MCM SQL Server 2008

SQL RNNR

Posting Performance Based Questions - Gail Shaw
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Post #910451

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