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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