FIX: ALTER TABLE, ADD CONSTRAINT, and PRIMARY KEY statements do not detect a duplicate key in SQL Server 2016

Applies to: SQL Server 2016 Enterprise CoreSQL Server 2016 EnterpriseSQL Server 2016 Developer

Symptoms


Assume that you use In-Memory OLTP in Microsoft SQL Server 2016. When you use the ALTER TABLE, ADD CONSTRAINT, or PRIMARY KEY statement to add a primary key for a memory-optimized table, even if the table already contains a primary key, the statement completes successfully. This issue may result in more than one primary (duplicate) key that is created in the same table. Additionally, errors occur when you insert data into the table.

Resolution


This fix is included in the following cumulative updates for SQL Server:

Status


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

References


Learn about the terminology Microsoft uses to describe software updates.