The following is the ORA-23500 error message, you can learn the cause and solution of the Oracle database error.

ORA-23500 cannot switch master for a multi-tier materialized view repgroup “string“.”string

Cause: An attempt was made to switch master for a materialized view repgroup when its parent repgroup is also a materialized view repgroup. This is not allowed.

Solution: Drop and recreate the materialized view repgroup based on a proper parent repgroup.


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