文档解释
ORA-10452: Cannot do block media recovery; media recovery session may be in progress
Cause: A media recovery, RMAN, or flashback database session may have been in progress when an attempt was made to perform block media recovery on the standby database.
Action: Check for and cancel any conflicting recovery session and perform block media recovery on the standby database.
ORA-10452: Cannot do block media recovery; media recovery session may be in progress
这是一个Oracle数据库的错误代码，指出不能进行块媒体恢复操作，可能已经有一个媒体恢复会话在运行中。
