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使用dbms_backup_restore包恢复数据库
Oracle提供了一个包:DBMS_BACKUP_RESTORE包是由dbmsbkrs.sql 和 prvtbkrs.plb 这两个脚本创建的.catproc.sql 脚本运行后会调用这两个包.所以是每个数据库都有的这个包是Oracle服务器和操作系统之间IO操作的接口.由恢复管理器直接调用。而且据说这两个脚本的功能是内建到Oracle的一些库文件中的.
由此可见，我们可以在数据库 nomount 情况下调用这些package ,来达到我们的恢复目的
1、启动数据库到nomount状态
[oracle@node1 ora11g]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Mon Dec 19 13:34:22 2011
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup nomount
ORACLE instance started.
Total System Global Area 2137886720 bytes
Fixed Size 2230072 bytes
Variable Size 1493174472 bytes
Database Buffers 637534208 bytes
Redo Buffers 4947968 bytes
2、恢复controlfile
SQL> DECLARE
2 devtype varchar2(256);
3 done boolean;
4 BEGIN
5 devtype:=sys.dbms_backup_restore.deviceAllocate (type=>'',ident=>'t1');
6 sys.dbms_backup_restore.restoreSetDatafile;
7 sys.dbms_backup_restore.restoreControlfileTo(cfname=>'/opt/oracle/oracleplus/ora11g/control01.ctl');
8 sys.dbms_backup_restore.restoreBackupPiece(done=>done,handle=>'/tmp/ora11g_02mu1avd_1_1.rman', params=>null);
9 sys.dbms_backup_restore.deviceDeallocate;
10 END;
11 /
PL/SQL procedure successfully completed.
3、恢复数据文件
SQL> DECLARE
2 devtype varchar2(256);
3 done boolean;
4 BEGIN
5 devtype:=sys.dbms_backup_restore.deviceAllocate (type=>'',ident=>'t1');
6 sys.dbms_backup_restore.restoreSetDatafile;
7 sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>1,toname=>'/opt/oracle/oracleplus/ora11g/system01.dbf');
sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>2,toname=>'/opt/oracle/oracleplus/ora11g/sysaux01.dbf');
sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>3,toname=>'/opt/oracle/oracleplus/ora11g/undotbs01.dbf');
8 9 10 sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>4,toname=>'/opt/oracle/oracleplus/ora11g/users01.dbf');
11 sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>5,toname=>'/opt/oracle/oracleplus/ora11g/example01.dbf');
12 sys.dbms_backup_restore.restoreBackupPiece(done=>done,handle=>'/tmp/ora11g_01mu1aqq_1_1.rman', params=>null);
13 sys.dbms_backup_restore.deviceDeallocate;
14 END;
15 /
PL/SQL procedure successfully completed.
4、启动数据库
SQL> alter database mount;
SQL> alter database recover until cancel using backup controlfile;
SQL> alter database open resetlogs;
5、特别说明
在oracle 10g及其以后版本中，因为rman中有catalog with start命令，可以实现rman备份的加载，所以不需要使用dbms_backup_restore包处理，在oracle 9i及其以前版本中，可能因为没有catalog库，控制文件中又没有了备份集信息，需要采用这种方法处理数据文件还原，然后根据实际情况，使用ALTER DATABASE REGISTER LOGFILE 添加日志，进行恢复
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最权威、专业的Oracle案例资源汇总之【学习笔记】使用dbms_backup_restore包恢复数据库