ORA-01093: ALTER DATABASE CLOSE only permitted with no sessions connected解决方法

在进行物理主备库角色转换的时候遇到ORA-01093错误

SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY;
ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY
*
ERROR at line 1:
ORA-01093: ALTER DATABASE CLOSE only permitted with no sessions connected

此错误的因为主库中有活动的会话造成的，解决的办法为：

1.杀掉活动会话，重新执行该命令

2.在该命令后面加上with session shutdown即

ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;