Microsoft KB Archive/278245

= Four-Part Linked Server Queries Through DB2OLEDB May Cause an Exception or Slow Performance =

Article ID: 278245

Article Last Modified on 2/11/2004

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APPLIES TO


 * Microsoft OLE DB Provider for DB2
 * Microsoft OLE DB Provider for DB2

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This article was previously published under Q278245



SYMPTOMS
If a SQL Server Linked Server uses the Microsoft OLE DB Provider for DB2 to access DB2 running on a mainframe computer with a large catalog size, the four-part query execution may lead to slow performance, or in some cases an Access Violation with an error message similar to the following:

SqlDumpExceptionHandler: Process generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION. SQL Server is terminating this process. Connection Broken



RESOLUTION
To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack



WORKAROUND
To workaround this problem, modify the four-part queries to use the Linked Server OPENQUERY syntax. For more information on OPENQUERY, please see the SQL Server books online.



STATUS
Microsoft has confirmed that this is a problem in Microsoft SNA Server version 4.0 SP2 and 4.0 SP3.

This problem was first corrected in SNA Server 4.0 Service Pack 4.

Additional query words: DB2 MVS OS/390 SNA TCP/IP TCP MSDASQL OPENROWSET Db2oledb sp2 sp3 4-part

Keywords: kbbug kbfix kbsna400presp4fix kbsna400sp4fix KB278245

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