KB4462481 - FIX: Query operation freezes when you insert data into a clustered columnstore index in parallel in SQL Server data warehousing


Assume that you use Microsoft SQL Server data warehousing. When you run parallel insert queries to insert data into a clustered columnstore index, the query operation freezes.


This problem is fixed in the following updates for SQL Server:

Cumulative Update 12 for SQL Server 2017

Cumulative update 4 for SQL Server 2016 SP2

About SQL Server builds

Each new build for SQL Server contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest build for your version of SQL Server:

The latest build for SQL Server 2017

Latest cumulative update for SQL Server 2016


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


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

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