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When you run DBCC CHECKTABLE command against a table that contains Clustered Columnstore Index (CCI) in SQL Server, an access violation error may occur. Additionally, SQL Server crashes frequently.


This access violation occurs when you run DBCC CHECKTABLE against corrupted Clustered Columnstore Index. To avoid this issue, you can drop and recreate the CCI.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


This issue is fixed in the following cumulative updates for SQL Server:

Note: The fix available here is not to address the corruption, but it will avoid the AV and provide more meaningful information as output to indicate the corruption is in the index.

About cumulative updates for 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. Check out the latest cumulative updates for SQL Server:


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

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