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