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SCOPE_IDENTITY problem after migrating from SQL Server 2000 to SQL Server 2005 when using ODBC API

Posted on 2006-11-16
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Last Modified: 2009-10-26
Hi to all,

I have a little problem using the SCOPE_IDENTITY to get the latest identity value inserted after an "INSERT INTO" statement, and this, using the ODBC API.

After inserting the row, I make a "SELECT SCOPE_IDENTITY()" to get the inserted ID but the return value is = 0.

If I use "SELECT @@IDENTITY" to get the identity, the returned ID is correct.

All was working fine under SQL Server 7 and SQL Server 2000 (after MDAC upgrade).

Any idea ?

P.S. : Under Query Analyser, the SCOPE_IDENTITY is working.
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Question by:mike_marquet
8 Comments
 
LVL 6

Expert Comment

by:so3
ID: 17955730
Use IDENT_CURRENT('table_name') to get the Identity value.
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LVL 20

Expert Comment

by:Sirees
ID: 17955774
From BOL:

SCOPE_IDENTITY() -
Returns the last IDENTITY value inserted into an IDENTITY column in the same scope. A scope is a module -- a stored procedure, trigger, function, or batch. Thus, two statements are in the same scope if they are in the same stored procedure, function, or batch.

IDENT_CURRENT -
Returns the last identity value generated for a specified table in any session and any scope.
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Author Comment

by:mike_marquet
ID: 17955815
Using IDENT_CURRENT is more complex because I have a generic class (CMyODBC) to access the database and therefore have a function called :

int ExecuteSQL(const char *szQuery, long *pID = NULL)

And don't know what I have in szQuery (INSERT, UPDATE, DELETE, ...) and don't know which table name to set in IDENT_CURRENT

The think I don't understand is WHY it works under SQL Server 7 and 2000 and NOT under SQL Server 2005
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Expert Comment

by:so3
ID: 17956169
try to use an OUTPUT parameter instead.
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Author Comment

by:mike_marquet
ID: 17956460
what do you mean by : try to use an OUTPUT parameter instead. ?
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LVL 6

Expert Comment

by:so3
ID: 17958730
Where do you create the querries?


if you are using stored procedure you can use an output parameter to return a value. You said that in Query Analyser, the SCOPE_IDENTITY is working so the problem is when the value is returned in your app. Can you post the ExecuteSQL method

An example on how to use output parameters can be found at http://www.awprofessional.com/articles/article.asp?p=25288&seqNum=9&rl=1
or
http://www.sqlteam.com/item.asp?ItemID=2644



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Author Comment

by:mike_marquet
ID: 17963308
If have found the solution.

The query to get the identity must be changed from

     "SELECT SCOPE_IDENTITY()"

to

     "SET NOCOUNT ON SELECT SCOPE_IDENTITY()"
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Guy Hengel [angelIII / a3] earned 0 total points
ID: 18006139
PAQing question with refund
angelIII, page editor
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