Symptoms
Consider the following scenario:
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You have a Microsoft SQL Server 2012 Analysis Services (SSAS 2012) or Microsoft SQL Server 2008 R2 Analysis Services (SSAS 2008 R2) database that has multiple data sources.
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You have a Multidimensional Expressions (MDX) query that contains some filters.
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You run the MDX query against a Relational OLAP (ROLAP) partition. The ROLAP partition and the dimension that is referenced by the filters come from different data sources
In this scenario, an incorrect result may be returned or an access violation may occur.
Cause
This issue occurs because a secondary data source prevents SSAS from pushing the filters into the SQL query. Because this is unexpected behavior, SSAS generates inconsistent internal data structures that lead to an access violation or incorrect results.
Resolution
Cumulative update information
The issue was first fixed in the following cumulative update of SQL Server.
Cumulative Update 10 for SQL Server 2012 /en-us/help/2891666
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Cumulative Update 8 for SQL Server 2008 R2 Service Pack 2The fix for this issue was first released in Cumulative Update 8. 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:
2871401 Cumulative update package 8 for 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
Cumulative Update 4 for SQL Server 2012 Service Pack 1The 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 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
2833645 Cumulative update package 4 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 Service Pack 1 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
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
The issue was partly fixed in a previous update. However, the fix that is described in this Knowledge Base (KB) article is complete. For the original fix, you can refer to the following article:
2770635 FIX: Incorrect result when you run an MDX query against an SSAS 2008 R2 or SSAS 2012 database that has multiple data sources
