4564868 - FIX: Assertion exception occurs when you query the DMV sys.dm_db_file_space_usage in SQL Server 2017 and 2019

Applies to: SQL Server 2019 on WindowsSQL Server 2017 Developer on WindowsSQL Server 2017 Enterprise Core on Windows


When you query the sys.dm_db_file_space_usage Dynamic Management Views (DMV) while the secondary replica has started transitioning its role to primary, you encounter the following assertion exception: 

Location: purecall.cpp:LineNumber, Expression: !"purecall", Description: Pure virtual function call


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 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:


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