Assume that you run a Data Analysis Expressions (DAX) query against a tabular model in Microsoft SQL Server 2012 Analysis Services (SSAS 2012). The DAX query contains a calculated measure that has many nested IF
conditions or a Switch
command that has many cases. In this situation, an out-of-memory error may occur.
This issue occurs because the DAX engine generates an inefficient query plan for the calculated measure. The query plan includes redundant joins for the calculated measure.
Cumulative update information
SQL Server 2012
The fix for this issue was first released in Cumulative Update 1 for SQL Server 2012. For more information about how to obtain this cumulative update package for SQL Server, click the following article number to view the article in the Microsoft Knowledge Base:
Cumulative update 1 for SQL Server 2012
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 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:
The SQL Server 2012 builds that were released after SQL Server 2012 was released
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about DAX queries, visit the following Microsoft Developer Network (MSDN) website:
For more information about tabular modeling, visit the following MSDN website:
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:
An Incremental Servicing Model is available from the SQL Server team to deliver hotfixes for reported problems
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:
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:
Description of the standard terminology that is used to describe Microsoft software updates