FIX: A query that involves an outer join operation runs very slowly in Microsoft SQL Server 2005
Bug: #50001820 (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. SYMPTOMSIn Microsoft SQL Server 2005, a
query that involves
an outer join
operation runs
very slowly.
However, if you use the FORCE ORDER query hint in the query, the query runs
much faster. Additionally, the execution plan of the query contains the following text in the Warnings column: NO JOIN PREDICATE RESOLUTIONThe fix for this issue was first released in
Cumulative Update 4. For more information about how to obtain this cumulative
update package for SQL Server 2005 Service Pack 2, click the following article
number to view the article in the Microsoft Knowledge Base: 941450 (http://support.microsoft.com/kb/941450/LN/) Cumulative update package 4 for SQL Server 2005 Service Pack 2 Note Because the builds are cumulative, each new fix release contains
all the hotfixes and all the security fixes that were included with the
previous SQL Server 2005 fix release. Microsoft recommends that you consider
applying the most recent fix release that contains this hotfix. For more
information, click the following article number to view the article in the
Microsoft Knowledge Base:937137 (http://support.microsoft.com/kb/937137/LN/) The SQL Server 2005 builds that were released after SQL Server 2005 Service Pack 2 was released
Microsoft SQL Server 2005 hotfixes are created for specific SQL
Server service packs. You must apply a SQL Server 2005 Service Pack 2 hotfix to
an installation of SQL Server 2005 Service Pack 2. By default, any hotfix that
is provided in a SQL Server service pack is included in the next SQL Server
service pack.
STATUSMicrosoft
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section. MORE INFORMATIONAfter you apply the hotfix, you must enable trace flag 4101 and trace flag 4121 to activate this hotfix. For more information about what files are changed, and for information about any prerequisites to apply the cumulative update package that contains the hotfix that is described in this Microsoft Knowledge Base article, click the following article number to view the article in the Microsoft Knowledge Base: 941450 (http://support.microsoft.com/kb/941450/LN/) Cumulative update package 4 for SQL Server 2005 Service Pack 2 REFERENCESFor more
information about the list of builds that are available after SQL Server
Service Pack 2, click the following article number to view the article in the
Microsoft Knowledge Base: 937137 (http://support.microsoft.com/kb/937137/LN/) The SQL Server 2005 builds that were released after SQL Server 2005 Service Pack 2 was released
For more information about the Incremental Servicing Model for SQL
Server, click the following article number to view the article in the Microsoft
Knowledge Base:935897 (http://support.microsoft.com/kb/935897/LN/) An Incremental Servicing Model is available from the SQL Server team to deliver hotfixes for reported problems For more information about how to obtain SQL Server 2005 Service
Pack 2, click the following article number to view the article in the Microsoft
Knowledge Base: 913089 (http://support.microsoft.com/kb/913089/LN/) How to obtain the latest service pack for SQL Server 2005 For more information about the new features and the improvements
in SQL Server 2005 Service Pack 2, visit the following Microsoft Web site:http://go.microsoft.com/fwlink/?LinkId=71711 (http://go.microsoft.com/fwlink/?LinkId=71711) 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/LN/) New naming schema for Microsoft SQL Server software update packages For more information about software update terminology, click the
following article number to view the article in the Microsoft Knowledge Base:824684 (http://support.microsoft.com/kb/824684/LN/) Description of the standard terminology that is used to describe Microsoft software updates APPLIES TO
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