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Assume that you have a table that uses clustered columnstore index in an instance of Microsoft SQL Server 2014, and you either have trace flag 2389 and 2390 or trace flag 4139 enabled. When you run a query that uses this table, an access violation may occur.


The issue was first fixed in the following cumulative update of SQL Server:

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. We recommend that you download and install the latest cumulative updates for SQL Server:


To work around this issue, disable trace flag 2389 and 2390, or disable trace flag 4139.


Learn about the terminology that Microsoft uses to describe software updates.

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