FIX: Access violation occurs when a query references an SQLCLR function through a synonym in SQL Server 2014 and 2016

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


Consider the following scenario:

  • There is an SQLCLR function that's declared as "deterministic", and the function can be used for the "replacement with a constant" optimization.
  • There is a synonym that points to the SQLCLR function. 
  • A table-valued function (TVF) references to the SQLCLR function through the synonym.

In this scenario, when an application queries this TVF, an access violation may occur, and you may receive an error message that resembles the following:

Message 0, Level 11, State 0, Row 14

A severe error occurred on the current command. The results, if any, should be discarded.

Additionally, an error message is logged in the SQL Server error log.


Service pack information for SQL Server

This issue is fixed in the following service pack for SQL Server:

       Service Pack 2 for SQL Server 2016

       Service Pack 3 for SQL Server 2014


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


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