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Heads-up - potential SQL Server bug
Message
From
30/03/2010 20:11:22
Mike Yearwood
Toronto, Ontario, Canada
 
 
To
29/03/2010 14:52:56
General information
Forum:
Visual FoxPro
Category:
Client/server
Environment versions
Visual FoxPro:
VFP 9 SP2
OS:
Windows 7
Miscellaneous
Thread ID:
01457886
Message ID:
01458163
Views:
62
>I'm working on a project inserting data into SQL Server 2005 (SugarCRM) via ODBC and SQLEXEC() etc.
>
>SugarCRM uses GUIDs as primary keys. They're not autogenerated, Sugar's business layer calls NewID() on inserts. If I'm inserting rows programmatically I need to get the primary key values back.
>
>One way to do this is by calling SCOPE_IDENTITY, @@IDENTITY etc. after the INSERT. But, a quick Google found a corner-case bug with these functions that is apparently not fixed even in SQL 2008:
>
>http://connect.microsoft.com/SQLServer/feedback/details/328811/scope-identity-sometimes-returns-incorrect-value
>
>Since this bug seems to crop up in parallel execution, larger installations may be more vulnerable than small ones based on SQL Server Express.
>
>While on the topic, is it possible to execute a stored procedure via ODBC and have it return an output that can be read in VFP? This seems to be the recommended approach.

It has been shown that SQL Server 2005 + use of NewSequentialID permits much faster insertions and retrieval of records than NewID based GUIDs. Also, if you generate the GUIDs locally, you won't have to request them as a second step.
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