文档解释
ORA-38872: Cannot perform backup control file recovery if Flashback Database is enabled.
Cause: RECOVER DATABASE with the BACKUP CONTROLFILE option, or a database recovery that required the control file be made a backup failed because Flashback Database was enabled or there was a guaranteed restore point.
Action: Disable Flashback Database or remove the guaranteed restore point and retry the command.
ORA-38872：若启用Flashback Database，则不能执行备份控制文件恢复操作。
