The SELECT permission was denied on the object ‘extended_properties’, database ‘mssqlsystemresource’, schema ‘sys’.

The SELECT permission was denied on the object ‘extended_properties’, database ‘mssqlsystemresource’, schema ‘sys’.

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Question: What I’m I doing wrong and I’m getting the below error message when trying to list my database’s tables?

Answer: Are you ready for the simplest explanation ever? ๐Ÿ™‚

The reason is that -most probably- (hey, you never know) you are using a SQL Server login that has conflicting permissions.

More specifically: The login you with which you are connected to the SQL Server instance, has the db_denydatareader database role assigned. This means, that whatever else database role the login has assigned to it, even db_owner, the db_denydatareader will be in conflict thus not allowing to access certain resources of the database.

How to fix that: If it is OK with your security requirements, remove the db_denydatareader role from the login. After that, you will be able to access the mapped database (if course the rest of the required permissions are in place).

Similarly, have in mind that you get the same behavior if you have write access to the database but also have the db_denydatawriter database role assigned to the login.

In general, be careful with the database roles you assign to any login and avoid giving conflicting accesses.


Recommended eBooks on SQL Server:

Tuning SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Tuning SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Administering SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Administering SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Artemakis Artemiou
Artemakis Artemiou is a Senior SQL Server Architect, Author, Software Developer and a Microsoft Data Platform MVP. He has over 15 years of experience in the IT industry in various roles. Among other, via his initiative SQLEBooks.com, Artemakis authors and publishes eBooks on different topics on SQL Server. Artemakis currently serves as the President of the Cyprus .NET User Group (CDNUG) and the International .NET Association Country Leader for Cyprus (INETA). Additionally he is the founder of the SQLArtBits initiative that aims to provide the technical community with simple, yet powerful and high-quality SQL Server tools. Currently, the highlights of these tools are DBA Security Advisor and In-Memory OLTP Simulator. Artemakis's official website can be found atย aartemiou.com. Artemakis's blogs can be found at: SQLNetHub.comย and TechHowTos.com.