How to fix the Oracle error ORA-30354: Query rewrite not allowed on SYS relations?

In this post, you’ll learn more about the Oracle ErrorORA-30354: Query rewrite not allowed on SYS relations with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30354: Query rewrite not allowed on SYS relations

Reason for the Error ORA-30354: Query rewrite not allowed on SYS relations

A SYS relation was referenced in the select clause for a materialized view with query rewrite enabled.

How to fix the Error ORA-30354: Query rewrite not allowed on SYS relations ?

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

Remove the reference to the SYS relation from the select clause or disable the REWRITE option on the materialized view.