Symptoms
Consider the following scenario:
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You apply cumulative update package 8 for Microsoft SQL Server 2008 R2 or a later version.
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You have an SSAS database that has multiple data sources. Some data sources are stored in the Multidimensional OLAP (MOLAP) partitions. Other data sources are stored in the Relational OLAP (ROLAP) partitions.
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You run a Multidimensional Expressions (MDX) query against the SSAS database.
In this scenario, an incorrect result may return.
Cause
This issue occurs because of a regression that is introduced in cumulative update package 8 for SQL Server 2008 R2 or SQL Server 2012.
Resolution
Cumulative update information
Cumulative Update 4 for SQL Server 2012 SP1
Note Both Cumulative Update 3 and Cumulative Update 4 for SQL Server 2012 SP1 can resolve this issue. We recommend that installing Cumulative Update 4 that is described in the following KB article:
The 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 2012 SP1, click the following article number to go to the article in the Microsoft Knowledge Base:
2833645 Cumulative update 4 for SQL Server 2012 SP1Note Given that 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 SP1 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 go to the article in the Microsoft Knowledge Base:
2772858 The SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was released
Cumulative Update 3 for SQL Server 2012 SP1
The fix for this issue was first released in Cumulative Update 3. For more information about how to obtain this cumulative update package for SQL Server 2012 SP1, click the following article number to view the article in the Microsoft Knowledge Base:
2812412 Cumulative update package 3 for SQL Server 2012 Service Pack 1Note 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 SP1 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:
2772858 The SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was released
Cumulative update 6 for SQL Server 2012
The 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 2012, click the following article number to view the article in the Microsoft Knowledge Base:
2728897 Cumulative update package 6 for SQL Server 2012Note 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:
2692828 The SQL Server 2012 builds that were released after SQL Server 2012 was released
Cumulative update 4 for SQL Server 2008 R2 Service Pack 2 (SP2)
The 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 2008 R2 Service Pack 2, click the following article number to view the article in the Microsoft Knowledge Base:
2777358 Cumulative update package 4 for SQL Server 2008 R2 Service Pack 2Note 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 Service Pack 2 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:
2730301 The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 Service Pack 2 was released
Workaround
To work around this issue, use a single data source instead of multiple data sources in the SSAS database.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
