Oracle Error QSM-01321: query rewrite not possible because materialized view string has TRUSTED constraints in ENFORCED integrity mode

Oracle Error Message

QSM-01321: query rewrite not possible because materialized view string has TRUSTED constraints in ENFORCED integrity mode

Reason for the Error

A stale materialized view created with USING TRUSTED CONSTRAINTS clause cannot be used when the query rewrite integrity mode is set ENFORCED.

Solution

Alter materialized view such that it has the ENFORCED CONSTRAINTS ALTER MATERIALIZED VIEW REFRESH USING ENFORCED CONSTRAINTS