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FIX: Performance of a SELECT statement that contains a LIKE operator and an ESCAPE clause is low in SQL Server 2008 R2 or in SQL Server 2012Article ID: 2698639 - View products that this article applies to. Microsoft distributes Microsoft SQL Server 2008 R2 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 2008 R2 fix release. On This PageSymptomsWhen you run a SELECT statement that contains a LIKE operator and an ESCAPE clause in SQL Server 2008 R2 or in SQL Server 2012, SQL Server may use an inefficient query plan for the statement. Additionally, the performance of the statement is low. CauseThis issue occurs because the number of rows that is estimated for the SELECT statement is much larger than the actual number of rows. ResolutionCumulative update informationCumulative update package 1 for SQL Server 2012 Service Pack 1The fix for this issue was first released in Cumulative Update 1. For more information about how to obtain this cumulative update package for SQL Server 2012 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:2765331 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 2012 fix release. We recommend 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:
(http://support.microsoft.com/kb/2765331/
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Cumulative update package 1 for SQL Server 2012 Service Pack 12772858
(http://support.microsoft.com/kb/2772858/
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The SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was releasedSQL Server 2012The fix for this issue was first released in Cumulative Update 3 for SQL Server 2012. For more information about this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:2723749 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 2012 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:
(http://support.microsoft.com/kb/2723749/LN/
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Cumulative update package 3 for SQL Server 20122692828 You must apply a SQL Server 2012 hotfix to an installation of SQL Server 2012.
(http://support.microsoft.com/kb/2692828/LN/
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The SQL Server 2012 builds that were released after SQL Server 2012 was released SQL Server 2008 R2 Service Pack 2The fix for this issue was first released in Cumulative Update 1 for SQL Server 2008 R2 Service Pack 2. For more information about how to obtain this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:2720425 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 2008 R2 fix release. We recommend 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:
(http://support.microsoft.com/kb/2720425/
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Cumulative Update package 1 for SQL Server 2008 R2 Service Pack 22730301
(http://support.microsoft.com/kb/2730301/
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The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 Service Pack 2 was released SQL Server 2008 R2The fix for this issue was first released in Cumulative Update 6. For more information about how to obtain this cumulative update package for SQL Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base:2679367 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 2008 R2 fix release. We recommend 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:
(http://support.microsoft.com/kb/2679367/
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Cumulative Update package 6 for SQL Server 2008 R2 981356 Note To enable this the fix of this issue, enable Trace Flag 4199.
(http://support.microsoft.com/kb/981356/
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The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 was releasedStatusMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
PropertiesArticle ID: 2698639 - Last Review: November 20, 2012 - Revision: 6.0 Applies to
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