利用DBMS_BACKUP_RESETORE从备份中恢复控制文件数据文件和归档日志

在Oracle 816 以后的版本中，Oracle提供了一个包: DBMS_BACKUP_RESTORE.DBMS_BACKUP_RESTORE，由dbmsbkrs.sql 和 prvtbkrs.plb 这两个脚本创建，

catproc.sql 脚本运行后会调用这两个包。该包是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。

在catalog的情况下，采用RMAN备份，如果丢失了控制文件，可以直接用RMAN恢复：

SQL>startup nomount;

ORACLE instance started.

Total System Global Area 101784276 bytes

Fixed Size 453332 bytes

Variable Size 75497472 bytes

Database Buffers 25165824 bytes

Redo Buffers 667648 bytes

SQL>

c:\>rman target xxx catalog xxx

Recovery Manager: Release 9.2.0.1.0 - Production

Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.

connected to target database: zhs16gbk (not mounted)

connected to recovery catalog database

RMAN>restore controlfile from 'C:\SOFTWARE\ORACLE\ORA92\DATABASE\C-165830944-20070412-01';

在nocatalog的情况下，采用RMAN备份，因为控制文件中包含了rman的备份信息，所以如果丢失了控制文件，不能用平常的方法来恢复。我们可以利用DBMS_BACKUP_RESTORE的包来恢复。该包在nomount下即可运行，也就是说，只需要启动到nomount下就可以利用它来恢复控制文件或者数据文件以及归档日志。

FUNCTION DeviceAllocate(

　　　　　　type IN VARCHAR2 default NULL,

　　　　　　name IN VARCHAR2 default NULL,

　　　　　　ident IN VARCHAR2 default NULL,

　　　　　　noio IN BOOLEAN default FALSE,

　　　　　　params IN VARCHAR2 default NULL ) RETURN VARCHAR2;

PROCEDURE RestoreControlFileTo(cfname IN VARCHAR2);

PROCEDURE RestoreDataFileTo(dfnumber IN binary_integer, toname IN VARCHAR2 default NULL);

1. 从备份中恢复控制文件

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

BEGIN

--分配一个device channel，如果使用的操作系统文件，type就为空，如果是从磁带上恢复要用 "sbt_tape"；

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate(type=>'',ident=>'t1');

--指明开始restore

SYS.DBMS_BACKUP_RESTORE.restoreSetDatafile;

--指出待恢复文件目标存储位置；

SYS.DBMS_BACKUP_RESTORE.RestoreControlFileTo(cfname=>'C:\SOFTWARE\ORACLE\ORADATA\MYDATA\CONTROL01.CTL');

--SYS.DBMS_BACKUP_RESTORE.RestoreControlFileTo(cfname=>'C:\SOFTWARE\ORACLE\ORADATA\MYDATA\CONTROL02.CTL');

--SYS.DBMS_BACKUP_RESTORE.RestoreControlFileTo(cfname=>'C:\SOFTWARE\ORACLE\ORADATA\MYDATA\CONTROL03.CTL');

--指定备份集的位置

SYS.DBMS_BACKUP_RESTORE.restoreBackupPiece(done=>done,handle=>'D:\DBBAK\CK_52_1_623326577', params=>null);

--释放通道

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

END;

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

BEGIN

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate(type=>'',ident=>'t1');

SYS.DBMS_BACKUP_RESTORE.restoreSetDatafile;

SYS.DBMS_BACKUP_RESTORE.RestoreSPFileTo(sfname=>'D:\CONTROL01.CTL');

SYS.DBMS_BACKUP_RESTORE.restoreBackupPiece(done=>done,handle=>'h:\rmanbackup\CNTR_20080401_2699_1_650869237', params=>null);

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

END;

2. 从备份中恢复数据文件(数据文件可以从v$datafile中获得)

A. 恢复0级备份中的数据文件

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

BEGIN

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate (type=>'',ident=>'t1');

SYS.DBMS_BACKUP_RESTORE.restoreSetDatafile;

SYS.DBMS_BACKUP_RESTORE.RestoreDataFileTo(dfnumber=>1,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\SYSTEM01.DBF');

SYS.DBMS_BACKUP_RESTORE.RestoreDataFileTo(dfnumber=>2,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\UNDOTBS01.DBF');

SYS.DBMS_BACKUP_RESTORE.RestoreDataFileTo(dfnumber=>3,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\INDX01.DBF');

SYS.DBMS_BACKUP_RESTORE.RestoreDataFileTo(dfnumber=>4,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\TOOLS01.DBF');

SYS.DBMS_BACKUP_RESTORE.RestoreDataFileTo(dfnumber=>5,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\USERS01.DBF');

SYS.DBMS_BACKUP_RESTORE.restoreBackupPiece(done=>done,handle=>'d:\dbbak\BK_1_1_623326719', params=>null);

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

END;

B. 恢复增量备份中的数据文件

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

BEGIN

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate (type=>'',ident=>'t1');

SYS.DBMS_BACKUP_RESTORE.ApplySetDataFile;

SYS.DBMS_BACKUP_RESTORE.ApplySetDataFile(dfnumber=>1,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\SYSTEM01.DBF');

SYS.DBMS_BACKUP_RESTORE.ApplySetDataFile(dfnumber=>2,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\UNDOTBS01.DBF');

SYS.DBMS_BACKUP_RESTORE.ApplySetDataFile(dfnumber=>3,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\INDX01.DBF');

SYS.DBMS_BACKUP_RESTORE.ApplySetDataFile(dfnumber=>4,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\TOOLS01.DBF');

SYS.DBMS_BACKUP_RESTORE.ApplySetDataFile(dfnumber=>5,toname=>'C:\SOFTWARE\ORACLE\ORADATA\ZHS16GBK\USERS01.DBF');

SYS.DBMS_BACKUP_RESTORE.applyBackupPiece(done=>done,handle=>'D:\DBBAK\BK_1_1_623326719', params=>null);

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

END;

(SELECT 'SYS.DBMS_BACKUP_RESTORE.RestoreDataFileTo(dfnumber=>' || file# ||

',toname=>' ||chr(39)|| name ||chr(39) || ');',

'SYS.DBMS_BACKUP_RESTORE.ApplySetDataFile(dfnumber=>' || file# ||

',toname=>' ||chr(39)|| name ||chr(39) || ');'

FROM V$DATAFILE; )

3. 从备份中恢复归档日志

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

begin

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate(type=>'',ident=>'t1');

SYS.DBMS_BACKUP_RESTORE.restoreSetArchivedLog('c:\software\oracle\oradata\zhs16gbk\archive');

SYS.DBMS_BACKUP_RESTORE.restoreArchivedLog(thread=>1,sequence=>42);

SYS.DBMS_BACKUP_RESTORE.restoreArchivedLog(thread=>1,sequence=>43);

SYS.DBMS_BACKUP_RESTORE.restoreBackupPiece(done=>done,handle=>'d:\dbbak\AL_3_1_623326755',params=>null);

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

end;

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

begin

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate(type=>'',ident=>'t1');

SYS.DBMS_BACKUP_RESTORE.restoreSetArchivedLog('c:\software\oracle\oradata\zhs16gbk\archive');

SYS.DBMS_BACKUP_RESTORE.restoreArchivedLog(thread=>1,sequence=>44);

SYS.DBMS_BACKUP_RESTORE.restoreArchivedLog(thread=>1,sequence=>45);

SYS.DBMS_BACKUP_RESTORE.restoreBackupPiece(done=>done,handle=>'d:\dbbak\AL_4_1_623326982',params=>null);

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

end;

OR (以下是将这两个备份文件中归档日志全部恢复出来）

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

BEGIN

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate(type=>'',ident=>'T1');

SYS.DBMS_BACKUP_RESTORE.restoreSetArchivedLog('c:\software\oracle\oradata\zhs16gbk\archive');

SYS.DBMS_BACKUP_RESTORE.restoreArchivedLogRange;

SYS.DBMS_BACKUP_RESTORE.restoreBackupPiece(done=>done,handle=>'d:\dbbak\AL_3_1_623326755',params=>null);

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

END;

DECLARE

devtype VARCHAR2(256);

done BOOLEAN;

BEGIN

devtype:=SYS.DBMS_BACKUP_RESTORE.DeviceAllocate(type=>'',ident=>'T1');

SYS.DBMS_BACKUP_RESTORE.restoreSetArchivedLog('c:\software\oracle\oradata\zhs16gbk\archive');

SYS.DBMS_BACKUP_RESTORE.restoreArchivedLogRange;

SYS.DBMS_BACKUP_RESTORE.restoreBackupPiece(done=>done,handle=>'d:\dbbak\AL_4_1_623326982',params=>null);

SYS.DBMS_BACKUP_RESTORE.DeviceDeAllocate;

END;