文档解释
ORA-38767: flashback retention target parameter mismatch
Cause: The value of parameters DB_FLASHBACK_RETENTION_TARGET must be same in all instances. All databases must have same flashback retention target parameters.
Action: Check DB_FLASHBACK_RETENTION_TARGET values in all instances.
ORA-38767错误发生在使用Flashback Database功能时，当将源数据库和目标数据库的flashback_retentio选项设置为不同的值时会发生此错误。
