How to fix the Oracle error QSM-02058: set operator in mv and compatibility mode is less than 9.0?

In this post, you’ll learn more about the Oracle ErrorQSM-02058: set operator in mv and compatibility mode is less than 9.0 with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02058: set operator in mv and compatibility mode is less than 9.0

Reason for the Error QSM-02058: set operator in mv and compatibility mode is less than 9.0

The capability in question is not supported when the materialized view uses a set operator and the compatibility mode is less than 9.0.

How to fix the Error QSM-02058: set operator in mv and compatibility mode is less than 9.0 ?

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

Re-phrase the query to avoid the use of set operators or set the compatibility mode to 9.0 or greater.