How to fix the Oracle error ORA-30462: unsupported operator: string?

In this post, you’ll learn more about the Oracle ErrorORA-30462: unsupported operator: string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30462: unsupported operator: string

Reason for the Error ORA-30462: unsupported operator: string

An attempt was made to refresh a summary containing an unsupported operator

How to fix the Error ORA-30462: unsupported operator: string ?

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

Verify that all columns of the summary contain expressions that are refreshable.