ORA-47411: Cannot use string due to Oracle Database Vault policy.
Cause: An operation that was attempted failed because Database Vault policy currently prevents the related feature from being used.
Action: Ask the Database Vault administrator to allow the feature to be used.
总体来说，ORA-47411错误是由Oracle Database Vault策略所致，通常是因为用户试图使用被禁止的字符串所致。要解决这个问题，用户可以重新配置角色，更改字符串策略，更改用户角色，实施安全措施和重新登录。