FIX: Data masking may not be applied when you use PIVOT or UNPIVOT function on masked column in SQL Server 2016 and 2017

Applies to: SQL Server 2016 DeveloperSQL Server 2016 EnterpriseSQL Server 2016 Enterprise Core

Symptoms


Assume that you are using Dynamic Data Masking (DDM) on a column in Microsoft SQL Server 2016 or 2017. When you use PIVOT or UNPIVOT function on the column which is masked, the data masking may not be applied.

Status


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

Resolution


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

References


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