cle/oradata/bre1/undotbs01.dbf' to '/bre1/oradata/undotbs01.dbf';
alter database rename file '/u01/app/oracle/oradata/bre1/users01.dbf' to '/bre1/oradata/users01.dbf';
alter database rename file '/u01/app/oracle/oradata/bre1/test.dbf' to '/bre1/oradata/test.dbf';
alter database rename file '/u01/app/oracle/oradata/bre1/redo01.log' to '/bre1/oradata/redo01.log';
alter database rename file '/u01/app/oracle/oradata/bre1/redo02.log' to '/bre1/oradata/redo02.log';
Database altered.
SQL>
Database altered.
SQL>
Database altered.
SQL>
Database altered.
SQL>
Database altered.
SQL>
Database altered.
SQL>
Database altered.
SQL> alter database rename file '/u01/app/oracle/oradata/bre1/redo03.log' to '/bre1/oradata/redo03.log';
Database altered. rename之后控制文件中的数据文件目录都已经改到了/bre1/oradata下，那么就可以进行恢复了。
6.恢复数据库
我这里是测试就没有恢复什么归档日志，如果是正式生产库，还需要恢复归档日志，可能还需要使用到CATALOG ARCHIVELOG 来注册归档的备份集和在RMAN中使用
RUN
{
SET ARCHIVELOG DESTINATION TO '/home/oracle';
RESTORE ARCHIVELOG all;
}
来还原出归档日志。
或者还可以在controlfile中修改归档目录来恢复。恢复出归档日志之后，就可以进行数据库恢复。
[oracle@bre2 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Thu Aug 21 11:16:06 2014
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> recover database using backup controlfile until cancel;
ORA-00279: change 830841 generated at 08/21/2014 10:03:36 needed for thread 1
ORA-00289: suggestion : /arch1_42_851018056.dbf
ORA-00280: change 830841 for thread 1 is in sequence #42
Specify log: {=suggested | filename | AUTO | CANCEL}
cancel
Media recovery cancelled.
SQL> alter database open resetlogs;
Database altered. open 过程中可能会遇到ora-00392错误，
解决办法：
使用SQL> alter database clear logfile group 2;
到此恢复成功！
总结：
主要的难点是需要对rman比较熟悉，需要使用语句修改控制文件中的文件位置，否则会报错找不到相关文件。
如果备份集的目录改变了，需要手工catalog注册备份集到控制文件，并且rename file。