Microsoft KB Archive/915328

= FIX: You may intermittently experience an access violation error when a query is executed in a parallel plan and the execution plan contains either a HASH JOIN operation or a Sort operation in SQL Server 2000 =

Article ID: 915328

Article Last Modified on 11/2/2007

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APPLIES TO


 * Microsoft SQL Server 2000 Developer Edition
 * Microsoft SQL Server 2000 Enterprise Edition
 * Microsoft SQL Server 2000 Personal Edition
 * Microsoft SQL Server 2000 Standard Edition

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Bug #: 415 (SQL Hotfix)



Microsoft distributes Microsoft SQL Server 2000 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2000 fix release.



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
 * Information about whether you must restart the computer after you install the hotfix package
 * Information about whether the hotfix package is replaced by any other hotfix package
 * Information about whether you must make any registry changes
 * The files that are contained in the hotfix package



SYMPTOMS
When you run a query in Microsoft SQL Server 2000, you may intermittently experience an access violation error in the CQList::Remove function.

You experience this problem if the following conditions are true:
 * The query is executed in a parallel plan.
 * The execution plan of the query contains either a HASH JOIN operation or a Sort operation.

For a list of all publicly released SQL Server 2000 Post-Service Pack hotfixes, see the following article in the Microsoft Knowledge Base:

894905 Cumulative list of the hotfixes that are available for SQL Server 2000 SP4



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next SQL Server 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

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

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
You must be running SQL Server 2000 Service Pack 3 (SP3) together with hotfix build 8.00.1007 or a later SQL Server 2000 service pack to apply this hotfix.

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 How to obtain the latest SQL Server 2000 service pack

Restart information
You do not have to restart the computer after you apply this hotfix.

Registry information
You do not have to change the registry.

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 of 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 item in Control Panel.

SQL Server 2000, 64-bit IA-64 versions


WORKAROUND
To work around this problem, add indexes or hints to the query to prevent a HASH JOIN operation or a Sort operation in the execution plan. Alternatively, use a MAXDOP 1 hint to cause the query to run serially.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

916653 FIX: An access violation may occur intermittently in the CQList::Remove function when you run a query in SQL Server 2000

Keywords: kbhotfixserver kbqfe kbpubtypekc KB915328

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