FIX: Unable to execute FORMAT function if it is wrapped inside CLR in SQL Server

Applies to: SQL Server 2012 Service Pack 3SQL Server 2012 DeveloperSQL Server 2012 Enterprise


The FORMAT function can't be executed if it's wrapped inside the common language runtime (CLR) in Microsoft SQL Server 2012 Service Pack 3 (SP3), SQL Server 2014 SP2, or SQL Server 2016. This issue occurs when you set the PERMISSION_SET property to SAFE.


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

Note This issue also occurs in the earlier versions of SQL Server 2012 (RTM, SP1, SP2), if you encounter this issue in the earlier versions of SQL Server 2012, you have to upgrade to SQL Server 2012 SP3 CU4 to fix the issue.


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


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