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From "Clough, Samuel \(USPC.PRG.Atlanta\)" <Samuel_Clo...@princetonrg.com>
Subject RE: Do not use <selectKey> with SCOPE_IDENTITY and MSSQL?
Date Tue, 18 Sep 2007 10:19:28 GMT
Like the original email mentioned, wasn't there an issue with @@IDENTITY
that would make it somewhat unreliable?  I don't remember specifics, but
there was a reason I switched from it to SCOPE_IDENTITY a few years
back.  Perhaps it was just as issue in an older version of MS SQL.

 

From: Gilles Bayon [mailto:ibatis.net@gmail.com] 
Sent: Tuesday, September 18, 2007 2:35 AM
To: user-cs@ibatis.apache.org
Subject: Re: Do not use <selectKey> with SCOPE_IDENTITY and MSSQL?

 

SCOPE_IDENTITY / @@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.
Therefore, two statements are in the same scope if they are in the same
stored procedure, function, or batch. 

SCOPE_IDENTITY and @@IDENTITY return the last identity values that are
generated in any table in the current session. 
However, SCOPE_IDENTITY returns values inserted only within the current
scope; @@IDENTITY is not limited to a specific scope. 

>From http://msdn2.microsoft.com/en-us/library/ms190315.aspx

So if you want to use the selectKey statement, use the @@IDENTITY.

If you want you can make an entry in the wiki
http://opensource.atlassian.com/confluence/oss/display/IBATIS/Home

-- 
Cheers,
Gilles

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