How to fix the Oracle error ORA-32303: mviews with user-defined types cannot reference multiple master sites?

In this post, you’ll learn more about the Oracle ErrorORA-32303: mviews with user-defined types cannot reference multiple master sites with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-32303: mviews with user-defined types cannot reference multiple master sites

Reason for the Error ORA-32303: mviews with user-defined types cannot reference multiple master sites

For materialized views with user-defined types, the definition query cannot reference tables from different master sites.

How to fix the Error ORA-32303: mviews with user-defined types cannot reference multiple master sites ?

You can fix this error in Oracle by following the below steps

Do not create materialized views with user-defined types referencing multiple master sites.