这里通过DDL的隐式提交特性来UPDATE GLOBAL_NAME。其实还有更简单的办法：OCI主动断开连接时的自动提交。如果UPDATE之后，直接退出sqlplus，UPDATE GLOBAL_NAME的事务实际也提交了。看起来ORACLE这时只是不能执行显式的COMMIT语句。
第6步，重启数据库：
SQL> shutdown immediate
ORA-00604: error occurred at recursive SQL level 1
ORA-01109: database not open
SQL> shutdown abort
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
Total System Global Area 209715200 bytes
Fixed Size 1266632 bytes
Variable Size 75500600 bytes
Database Buffers 130023424 bytes
Redo Buffers 2924544 bytes
Database mounted.
Database opened.
ORA-00604: error occurred at recursive SQL level 1
ORA-01109: database not open
SQL> shutdown abort
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
Total System Global Area 209715200 bytes
Fixed Size 1266632 bytes
Variable Size 75500600 bytes
Database Buffers 130023424 bytes
Redo Buffers 2924544 bytes
Database mounted.
Database opened.
看起来只能以abort方式关闭数据库：
成功了，数据库起来了。没有数据丢失，没有使用备份。不需要基于时间点的恢复，不需要BBED，不需要Resetlog。
