FIX: A query may take a long time to compile when the query contains several JOIN clauses against a SQL Server 2005 database

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Article ID: 922438 - View products that this article applies to.
Bug #: 958 (SQL Hotfix)
Microsoft distributes Microsoft SQL Server 2005 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 2005 fix release.
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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
  • 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 against a SQL Server 2005 database, the query may take a long time to compile. Additionally, you may experience high CPU utilization.

This problem occurs if the following conditions are true:
  • The query contains several JOIN clauses. For example, the query includes self joins.
  • The JOIN clauses contain JOIN predicates that all refer to the same column.
  • The same column to which all the JOIN predicates refer requires implicit or explicit data type conversion.
  • The same column to which all the JOIN predicates refer has a histogram that contains a single value.

RESOLUTION

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. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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
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 have Microsoft SQL Server 2005 Service Pack 1 (SP1) installed to apply this hotfix. For more information about how to obtain SQL Server 2005 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
913089 How to obtain the latest service pack for SQL Server 2005

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 replacement information

This hotfix does not replace any other hotfixes.

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.
32-bit hotfix
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Logread.exe2005.90.2175.0398,11220-Jul-200619:26x86
Microsoft.analysisservices.adomdclient.dll9.0.2175.0543,52020-Jul-200619:26x86
Microsoft.analysisservices.deploymentengine.dll9.0.2175.0138,01620-Jul-200619:26x86
Microsoft.analysisservices.dll9.0.2175.01,215,26420-Jul-200619:30x86
Microsoft.sqlserver.mgdsqldumper.dll2005.90.2175.075,55220-Jul-200619:25x86
Microsoft.sqlserver.sqlenum.dll9.0.2175.0908,06420-Jul-200619:29x86
Msgprox.dll2005.90.2175.0197,92020-Jul-200619:28x86
Msmdlocal.dll9.0.2175.015,701,79220-Jul-200619:31x86
Msmdredir.dll9.0.2175.03,967,77620-Jul-200619:31x86
Mssqlsystemresource.ldfNot Applicable524,28820-Jul-200616:50Not Applicable
Mssqlsystemresource.mdfNot Applicable39,911,42420-Jul-200616:50Not Applicable
Replprov.dll2005.90.2175.0547,61620-Jul-200619:26x86
Replrec.dll2005.90.2175.0782,11220-Jul-200619:29x86
Sqlaccess.dll2005.90.2175.0347,93620-Jul-200619:25x86
Sqlservr.exe2005.90.2175.028,952,92020-Jul-200619:31x86
Sysdbupg.sqlNot Applicable192,34619-Jul-200617:02Not Applicable
Xpstar90.dll2005.90.2175.0292,64020-Jul-200619:40x86
Xpstar90.rll2005.90.2175.0152,86420-Jul-200619:27x86
64-bit hotfix
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Logread.exe2005.90.2175.0522,52821-Jul-200602:01x64
Microsoft.analysisservices.adomdclient.dll9.0.2175.0543,52020-Jul-200619:26x86
Microsoft.analysisservices.adomdclient.dll9.0.2175.0543,52021-Jul-200602:02x86
Microsoft.analysisservices.deploymentengine.dll9.0.2175.0138,01620-Jul-200619:26x86
Microsoft.analysisservices.dll9.0.2175.01,215,26420-Jul-200619:30x86
Microsoft.sqlserver.mgdsqldumper.dll2005.90.2175.075,55220-Jul-200619:25x86
Microsoft.sqlserver.mgdsqldumper.dll2005.90.2175.091,42421-Jul-200602:00x64
Microsoft.sqlserver.sqlenum.dll9.0.2175.0875,29621-Jul-200602:01x86
Msgprox.dll2005.90.2175.0259,36021-Jul-200602:01x64
Msmdlocal.dll9.0.2175.015,701,79220-Jul-200619:31x86
Msmdredir.dll9.0.2175.03,967,77620-Jul-200619:31x86
Mssqlsystemresource.ldfNot Applicable524,28820-Jul-200616:50Not Applicable
Mssqlsystemresource.mdfNot Applicable39,911,42420-Jul-200616:50Not Applicable
Replprov.dll2005.90.2175.0745,24821-Jul-200602:02x64
Replrec.dll2005.90.2175.01,008,41621-Jul-200602:01x64
Sqlaccess.dll2005.90.2175.0355,10421-Jul-200602:01x86
Sqlservr.exe2005.90.2175.039,342,88021-Jul-200602:01x64
Sysdbupg.sqlNot Applicable192,34619-Jul-200617:02Not Applicable
Xpstar90.dll2005.90.2175.0540,44821-Jul-200602:02x64
Xpstar90.rll2005.90.2175.0153,37621-Jul-200602:00x64
64-bit hotfix for Itanium processors
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Logread.exe2005.90.2175.01,095,45620-Jul-200621:01IA-64
Microsoft.analysisservices.adomdclient.dll9.0.2175.0543,52020-Jul-200619:26x86
Microsoft.analysisservices.adomdclient.dll9.0.2175.0543,52020-Jul-200621:00x86
Microsoft.analysisservices.deploymentengine.dll9.0.2175.0138,01620-Jul-200619:26x86
Microsoft.analysisservices.dll9.0.2175.01,215,26420-Jul-200619:30x86
Microsoft.sqlserver.mgdsqldumper.dll2005.90.2175.075,55220-Jul-200619:25x86
Microsoft.sqlserver.mgdsqldumper.dll2005.90.2175.0163,10420-Jul-200620:59IA-64
Microsoft.sqlserver.sqlenum.dll9.0.2175.0875,29620-Jul-200621:01x86
Msgprox.dll2005.90.2175.0542,49620-Jul-200621:00IA-64
Msmdlocal.dll9.0.2175.048,828,70420-Jul-200621:02IA-64
Msmdredir.dll9.0.2175.06,154,01620-Jul-200621:01IA-64
mssqlsystemresource.ldfNot Applicable524,28820-Jul-200616:50Not Applicable
Mssqlsystemresource.mdfNot Applicable39,911,42420-Jul-200616:50Not Applicable
Replprov.dll2005.90.2175.01,617,18420-Jul-200621:01IA-64
Replrec.dll2005.90.2175.02,141,47220-Jul-200621:01IA-64
Sqlaccess.dll2005.90.2175.0349,47220-Jul-200621:00x86
Sqlservr.exe2005.90.2175.072,251,16820-Jul-200621:02IA-64
Sysdbupg.sqlNot Applicable192,34619-Jul-200617:02Not Applicable
Xpstar90.dll2005.90.2175.0950,56020-Jul-200621:03IA-64
Xpstar90.rll2005.90.2175.0152,35220-Jul-200620:59IA-64

STATUS

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

MORE INFORMATION

To enble this hotfix, you must enable trace flag 4106. To do this, use one of the following methods:
  • Specify the trace flag as a startup parameter of the SQL Server service. When you specify the trace flag as a startup parameter, the trace flag is automatically enabled when the SQL Server service starts.
  • Interactively enable or disable the trace flag by using the DBCC TRACEON and DBCC TRACEOFF commands.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 922438 - Last Review: October 9, 2011 - Revision: 2.0
APPLIES TO
  • Microsoft SQL Server 2005 Developer Edition
  • Microsoft SQL Server 2005 Enterprise Edition
  • Microsoft SQL Server 2005 Enterprise Edition for Itanium-based Systems
  • Microsoft SQL Server 2005 Enterprise X64 Edition
  • Microsoft SQL Server 2005 Standard Edition
  • Microsoft SQL Server 2005 Standard X64 Edition
  • Microsoft SQL Server 2005 Standard Edition for Itanium-based Systems
Keywords: 
kbautohotfix kbtshoot kbfix kbbug kbHotfixServer kbqfe KB922438

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