KB4531009 - FIX: An access violation may occur when the optimizer uses an Adaptive Join in SQL Server 2017


Assume that you run a query with joins to retrieve data from two or more tables in SQL Server 2017. In some situations, when the query optimizer replaces a physical join operator like Hash Joins or Nested Loop Joins with the Adaptive Join operator, you may experience an access violation exception. This issue may occur intermittently.


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


This issue is fixed in the following cumulative update 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:


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