Oracle Error QSM-02178: MV has a view with UNION ALL that is not fast refreshable

Oracle Error Message

QSM-02178: MV has a view with UNION ALL that is not fast refreshable

Reason for the Error

The materialized view has a view whose definition involves a UNION ALL query that does not satisfy the requirements for fast refresh.

Solution

Check that the defining query of the view being referenced in the materialized view satisfies conditions for fast refresh of a UNION ALL materialized view.

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