How to fix the Oracle error ORA-12091: cannot online redefine table “string”.”string” with materialized views?

In this post, you’ll learn more about the Oracle ErrorORA-12091: cannot online redefine table “string”.”string” with materialized views with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12091: cannot online redefine table “string”.”string” with materialized views

Reason for the Error ORA-12091: cannot online redefine table “string”.”string” with materialized views

An attempt was made to online redefine a table that had materialized views defined on it or had a materialized view log defined on it or is a master.

How to fix the Error ORA-12091: cannot online redefine table “string”.”string” with materialized views ?

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

Drop all materialized views and materialized view logs before attempting to online redefine the table.