FIX: Access Violation When Using UNIONs in Transact-SQL Cursors

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This article was previously published under Q233190

BUG #: 54345 (SQLBUG_70)

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SYMPTOMS

If a UNION appears as a subquery or derived table and the UNION contains parameters or local variables, the connection will get an access violation (AV). You will receive an error message similar to the following:

ODBC: Msg 0, Level 19, State 1
SqlDumpExceptionHandler: Process 7 generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION. SQL Server is terminating this process.

Connection Broken

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WORKAROUND

To work around this problem, try either of the following:

Do not use a UNION as a derived table.

-or-
If you do use a UNION, make sure it does not contain parameters or local variables.

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STATUS

Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 1 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

232570 (http://support.microsoft.com/kb/232570/ ) INF: How to Obtain Service Pack 1 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0

For more information, contact your primary support provider.

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