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Article ID: 893172 - Last Review: November 2, 2007 - Revision: 2.6

FIX: An access violation may occur when you use the READPAST lock hint and you use a non-clustered index in your query in SQL Server 2000

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Bug #: 473682 (SQL Server 8.0)

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SUMMARY

This article describes the following about this hotfix release:

The issues that are fixed by this hotfix package
The prerequisites for installing the hotfix package
Whether you must restart your computer after you install the hotfix package
Whether the hotfix package is replaced by any other hotfix package
Whether you must make any registry changes
The files that are contained in the hotfix package

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In Microsoft SQL Server 2000, when you use the READPAST lock hint to query a table, the lock hint may cause an access violation to occur. When the access violation occurs, you receive the following error message in the SQL Server error log:

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

Additionally, the following stack dump is displayed in the details of the error message:

* Short Stack Dump
* 008008A9 Module(sqlservr+004008A9) (SafePositionToBookmark+00000073)
* 00800822 Module(sqlservr+00400822) (RowsetSS::GetRowsByBookmark+00000083)
* 0043AFFF Module(sqlservr+0003AFFF) (CQScanFetch::GetRow+000000A4)
* 0056D0EC Module(sqlservr+0016D0EC) (CQScanFilter::GetRow+00000019)
* 006E3308 Module(sqlservr+002E3308) (CQScanConcat::GetRow+0000001C)
* 0040E1DB Module(sqlservr+0000E1DB) (CQScanTop::GetRow+00000045)
* 0040DEE3 Module(sqlservr+0000DEE3) (CQueryScan::GetRow+00000014)
* 0059A22F Module(sqlservr+0019A22F) (CFetchKeyset::Fetch+0000052D)
* 00582DB7 Module(sqlservr+00182DB7) (CCursor::Fetch+00000249)
* 00590F77 Module(sqlservr+00190F77) (SPCursor::Fetch+00000546)
* 005F144B Module(sqlservr+001F144B) (CSpecProc::ExecuteSpecial+000000D5)
* 005F1988 Module(sqlservr+001F1988) (CSpecProc::Execute+000000B6)
* 0061353F Module(sqlservr+0021353F) (execrpc+000004A6)
* 0043816D Module(sqlservr+0003816D) (execute_rpc+00000019)
* 00427001 Module(sqlservr+00027001) (process_commands+00000232)
* 41075002 Module(UMS+00005002) (ProcessWorkRequests+00000272)
* 41074698 Module(UMS+00004698) (ThreadStartRoutine+00000098)
* 78008454 Module(MSVCRT+00008454) (endthread+000000C1)
* 7C4E987C Module(KERNEL32+0000987C) (SetThreadExecutionState+00000227)

Note This problem does not occur when a clustered index is used in the query.

For a list of previous hotfixes, see the "Microsoft SQL Server 2000 post-Service Pack 3 or Microsoft SQL Server 2000 post-Service Pack 3a hotfixes" section in the following Microsoft Knowledge Base article:

290211 (http://support.microsoft.com/kb/290211/ ) How to obtain the latest SQL Server 2000 service pack

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CAUSE

This problem may occur when any one of the following conditions is true:

One connection that is using the READPAST lock hint query is between a cursor open request and a cursor fetch request. Another connection updates rows of a bookmark result set. This condition may cause the bookmark position to be Null. The Null bookmark position causes access violation to occur.
Your application uses the Microsoft Open Database Connectivity (ODBC) interface or the Microsoft OLEDB interface for server-side cursors that use the READPAST hint in SELECT statements.

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RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must install SQL Server 2000 Service Pack 3. For more information about how to obtain SQL Server 2000 Service Pack 3, click the following article number to view the article in the Microsoft Knowledge Base:

290211 (http://support.microsoft.com/kb/290211/ ) How to obtain the latest SQL Server 2000 service pack

Restart information

You do not have to restart your computer after you apply this hotfix.

Hotfix file information

This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain all the files that you must have to fully update a product to the latest build.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

SQL Server 2000, 32-bit versions

   Date         Time   Version         Size       File name
   -----------------------------------------------------------
   10-Feb-2005  17:59  2000.80.1007.0    664,128  Autoplt.dll      
   10-Feb-2005  17:59  2000.80.1007.0     78,400  Console.exe      
   10-Feb-2005  17:59  2000.80.1007.0    332,352  Ctasksui.dll     
   10-Feb-2005  17:59  2000.80.1007.0    315,968  Custtask.dll     
   10-Feb-2005  17:59  2000.80.1007.0     33,340  Dbmslpcn.dll     
   10-Feb-2005  17:59  2000.80.1007.0  1,905,216  Dtspkg.dll       
   10-Feb-2005  17:59  2000.80.1007.0    528,960  Dtspump.dll      
   10-Feb-2005  17:59  2000.80.1007.0     41,536  Dtsrun.exe       
   10-Feb-2005  17:59  2000.80.1007.0  1,557,052  Dtsui.dll        
   10-Feb-2005  17:59  2000.80.1007.0    639,552  Dtswiz.dll       
   10-Feb-2005  17:59  2000.80.1007.0    352,828  Isqlw.exe        
   10-Feb-2005  17:59  2000.80.1007.0     82,492  Itwiz.exe        
   10-Feb-2005  17:59  2000.80.1007.0     90,692  Msgprox.dll      
   31-Dec-2004  19:16  8.11.41022.0      226,304  Mssdi98.dll      
   10-Feb-2005  17:59  2000.80.1007.0     62,024  Odsole70.dll     
   10-Feb-2005  18:00  2000.80.1007.0     25,144  Opends60.dll     
   10-Feb-2005  03:56                     17,576  Opends60.lib
   10-Feb-2005  17:59  2000.80.1007.0     57,904  Osql.exe         
   10-Feb-2005  17:59  2000.80.1007.0    279,104  Pfutil80.dll     
   10-Feb-2005  17:59  2000.80.1007.0    143,940  Qrdrsvc.exe      
   10-Feb-2005  17:59  2000.80.1007.0    221,768  Replprov.dll     
   10-Feb-2005  17:59  2000.80.1007.0    307,784  Replrec.dll      
   10-Feb-2005  17:59  2000.80.1007.0    287,304  Rinitcom.dll     
   10-Feb-2005  17:59  2000.80.1007.0     78,416  Sdiclnt.dll      
   10-Feb-2005  17:59  2000.80.1007.0     66,112  Semmap.dll       
   10-Feb-2005  17:59  2000.80.1007.0     57,916  Semnt.dll        
   10-Feb-2005  17:59  2000.80.1007.0    492,096  Semobj.dll       
   10-Feb-2005  17:59  2000.80.1007.0     53,832  Snapshot.exe
   10-Feb-2005  17:58  2000.80.1007.0     28,672  Sqlagent.dll     
   10-Feb-2005  17:59  2000.80.1007.0    311,872  Sqlagent.exe     
   10-Feb-2005  17:58  2000.80.1007.0    168,001  Sqlakw32.dll     
   10-Feb-2005  03:09                      4,352  Sqlakw32.lib
   10-Feb-2005  18:00  2000.80.1007.0     33,344  Sqlctr80.dll
   10-Feb-2005  18:00  2000.80.1007.0    815,676  Sqldata.dll      
   10-Feb-2005  18:00  2000.80.1007.0  4,215,360  Sqldmo.dll       
   10-Feb-2005  17:59                     25,172  Sqldumper.exe    
   10-Feb-2005  17:59  2000.80.1007.0    156,224  Sqlmaint.exe
   10-Feb-2005  18:00  2000.80.1007.0    180,792  Sqlmap70.dll
   10-Feb-2005  18:00  2000.80.1007.0    188,992  Sqlmmc.dll       
   10-Feb-2005  18:00  2000.80.1007.0    401,984  Sqlqry.dll       
   10-Feb-2005  18:00  2000.80.1007.0     57,920  Sqlrepss.dll     
   10-Feb-2005  18:00  2000.80.1007.0  7,721,041  Sqlservr.exe
   10-Feb-2005  18:00  2000.80.1007.0    590,396  Sqlsort.dll      
   10-Feb-2005  18:00  2000.80.1007.0     45,644  Sqlvdi.dll
   10-Feb-2005  18:00  2000.80.1007.0    106,588  Sqsrvres.dll
   10-Feb-2005  18:00  2000.80.1007.0     33,340  Ssmsgnet.dll     
   10-Feb-2005  18:00  2000.80.1007.0     33,340  Ssmslpcn.dll     
   10-Feb-2005  18:00  2000.80.1007.0     33,340  Ssmsqlgc.dll
   10-Feb-2005  18:00  2000.80.1007.0     33,340  Ssmssnet.dll     
   10-Feb-2005  18:00  2000.80.1007.0     82,492  Ssnetlib.dll     
   10-Feb-2005  18:00  2000.80.1007.0     25,148  Ssnmpn70.dll     
   10-Feb-2005  18:00  2000.80.1007.0    123,456  Stardds.dll
   10-Feb-2005  18:00  2000.80.1007.0    158,240  Svrnetcn.dll     
   10-Feb-2005  17:59  2000.80.1007.0     76,416  Svrnetcn.exe     
   10-Feb-2005  18:00  2000.80.1007.0     49,228  Ums.dll          
   10-Feb-2005  18:00  2000.80.1007.0     74,304  Xplog70.dll
   10-Feb-2005  18:00  2000.80.1007.0     98,872  Xpweb70.dll      
   15-Feb-2005  22:18                      6,726  Hotfix1.inf
   15-Feb-2005  22:18                      2,469  Hotfix2.inf
   31-Dec-2004  19:15  8.0.21213.0       352,256  Msvcr71.dll
   31-Dec-2004  19:15  2000.80.796.0      57,904  Osql.exe         
   31-Dec-2004  19:15  2000.80.534.0     127,548  Sqdedev.dll      
   31-Dec-2004  19:15  2000.80.194.0     180,290  Sqlunirl.dll
   10-Feb-2005  02:56  2000.80.1007.0    159,813  Replres.rll
   10-Feb-2005  03:37  2000.80.1007.0    172,032  Semobj.rll
   10-Feb-2005  02:45  2000.80.1007.0     28,672  Sqlevn70.rll
   10-Feb-2005  03:44  2000.80.1007.0    479,232  Sqlmmc.rll

SQL Server 2000, 64-bit version

   Date         Time   Version         Size        File name	  Platform
   -----------------------------------------------------------------------
   03-Mar-2005  22:13  2000.80.1007.0      56,832  Dbmslpcn.dll   IA-64
   03-Mar-2005  22:12  2000.80.1007.0     528,960  Dtspump.dll
   03-Mar-2005  22:13  2000.80.1007.0     185,856  Msgprox.dll
   31-Dec-2004  19:10  8.11.41022.0       742,912  Mssdi98.dll
   03-Mar-2005  22:13  2000.80.1007.0     151,040  Odsole70.dll
   03-Mar-2005  22:14  2000.80.1007.0      27,136  Opends60.dll
   10-Feb-2005  18:17                      19,880  Opends60.lib
   03-Mar-2005  22:13  2000.80.1007.0     148,992  Osql.exe
   03-Mar-2005  22:13  2000.80.1007.0     353,280  Qrdrsvc.exe    IA-64
   03-Mar-2005  22:13  2000.80.1007.0     534,528  Replprov.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0     769,024  Replrec.dll
   03-Mar-2005  22:13  2000.80.1007.0     650,240  Rinitcom.dll
   03-Mar-2005  22:13  2000.80.1007.0     160,768  Semmap.dll     IA-64
   03-Mar-2005  22:13  2000.80.1007.0     132,608  Semnt.dll      IA-64
   03-Mar-2005  22:13  2000.80.1007.0      88,576  Snapshot.exe
   03-Mar-2005  22:12  2000.80.1007.0      10,240  Sqlagent.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0   1,055,232  Sqlagent.exe
   03-Mar-2005  22:13  2000.80.1007.0      90,112  Sqlboot.dll    IA-64
   03-Mar-2005  22:13  2000.80.1007.0      32,256  Sqlctr80.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0     812,032  Sqldata.dll    IA-64
   03-Mar-2005  22:13  2000.80.1007.0  13,845,504  Sqldmo.dll     IA-64
   03-Mar-2005  22:13                      39,936  Sqldumper.exe  IA-64
   03-Mar-2005  22:13  2000.80.1007.0     493,568  Sqlmaint.exe   IA-64
   03-Mar-2005  22:13  2000.80.1007.0      23,040  Sqlmap70.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0     152,064  Sqlrepss.dll   IA-64
   03-Mar-2005  22:14  2000.80.1007.0  25,271,808  Sqlservr.exe   IA-64
   03-Mar-2005  22:13  2000.80.1007.0     616,960  Sqlsort.dll    IA-64
   03-Mar-2005  22:13  2000.80.1007.0     120,320  Sqlvdi.dll     IA-64
   03-Mar-2005  22:13  2000.80.1007.0     227,328  Sqsrvres.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0      53,760  Ssmslpcn.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0      59,904  Ssmsqlgc.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0     256,000  Ssnetlib.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0      20,992  Ssnmpn70.dll   IA-64
   03-Mar-2005  22:14  2000.80.1007.0     430,080  Svrnetcn.dll   IA-64
   03-Mar-2005  22:13  2000.80.1007.0     185,856  Svrnetcn.exe   IA-64
   03-Mar-2005  22:14  2000.80.1007.0     183,296  Xplog70.dll    IA-64
   03-Mar-2005  22:14  2000.80.1007.0     187,392  Xpweb70.dll    IA-64
   03-Mar-2005  22:17                       5,065  Hotfix1.inf
   31-Dec-2004  19:10  2000.80.962.0       57,904  Osql.exe       x86
   31-Dec-2004  19:10  2000.80.760.0      269,824  Sqdedev.dll    IA-64
   10-Feb-2005  18:46  2000.80.1007.0     146,432  Replres.rll
   10-Feb-2005  18:17  2000.80.1007.0      19,968  Sqlevn70.rll

Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.

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WORKAROUND

To work around this problem, use one or more of the following methods:

Use a clustered index instead of a non-clustered index.
Use client-side cursors.

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STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.

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MORE INFORMATION

For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:

822499 (http://support.microsoft.com/kb/822499/ ) New naming schema for Microsoft SQL Server software update packages

For more information about the terminology that Microsoft uses when it corrects software after it is released, click the following article number to view the article in the Microsoft Knowledge Base:

824684 (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates

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