如果表的許多分區被意外drop，需要利用帶庫上的備份集在測試機上做不完全恢複，而具體日期需要達到一個特定的時間，那麽我們可以參考下文中的解決方法。
◆首先需要用logminer查出刪除語句：
uncompress /oracle/oradata/xxx/xxx.ARC.Z
...
begin
sys.dbms_logmnr.add_logfile('/oracle/oradata/xxx/xxx.ARC');
...
end;
begin sys.dbms_logmnr.start_logmnr(Options => sys.dbms_logmnr.DICT_FROM_ONLINE_CATALOG); end;
create table xsb_logminer_1 as
select timestamp, seg_name,operation, sql_redo
from V$LOGMNR_CONTENTS
where seg_owner='XXX' and operation='DDL' and sql_redo like 'ALTER TABLE XXX DROP PARTITION %';
BEGIN sys.dbms_logmnr.end_logmnr();END;
◆然後在生産庫上創建pfile：
create pfile='...' from spfile;
需要從帶庫上恢複rman備份集至生産機上,將此備份集FTP至測試機上，連同pfile文件.
在測試機上創建與生産機上相同目錄，admin ...
在測試機上創建新實例：
orapwd file=... password=xxx
然後修改pfile文件內容，改變control_files內容。
◆啓動新實例
export ORACLE_SID=xxx
sqlplus / as sysdba
startup nomount pfile='/home/oracle/init_xxx.ora';
create spfile from pfile='/home/oracle/init_xxx.ora';
exit
RMAN target sys/xxx
restore controlfile from '...';
startup mount
--crosscheck backup;
list backup;
run
{
set newname for datafile 1 to '/oracle/oradata/xxx/system01.dbf';
set newname for datafile 2 to '/oracle/oradata/xxx/undo01.dbf';
set newname for datafile 3 to '/oracle/oradata/xxx/sysaux01.dbf';
set newname for datafile 6 to '/oracle/oradata/xxx/pay_ts01.dbf';
restore datafile 1;
restore datafile 2;
restore datafile 3;
restore datafile 6;
}
(注：發現單個datafile恢複不如整庫恢複快！)
sql 'alter database backup controlfile to trace';
shutdown immediate;
exit
然後修改controlfile文件內容，去掉不用的文件名
◆不完全恢複數據庫:
sqlplus / as sysdba
startup nomount;
◆重建控制文件
CREATE CONTROLFILE REUSE DATABASE "XXX" RESETLOGS ARCHIVELOG
MAXLOGFILES 40
MAXLOGMEMBERS 3
MAXDATAFILES 400
MAXINSTANCES 2
MAXLOGHISTORY 454
LOGFILE
GROUP 1 (
'/oracle/oradata/xxx/rdb_redo01a'
) SIZE 10M,
GROUP 2 (
'/oracle/oradata/xxx/rdb_redo02a'
) SIZE 10M
DATAFILE
'/oracle/oradata/xxx/system01.dbf',
'/oracle/oradata/xxx/undo01.dbf',
'/oracle/oradata/xxx/sysaux01.dbf',
'/oracle/oradata/xxx/pay_ts01.dbf'
CHARACTER SET ZHS16GBK
;
recover database until cancel using backup controlfile;
...
alter database open resetlogs;
◆做數據恢複操作:
create table xxx as select xxx from xxx where xxx;
exp,ftp .dmp,imp
也可以如下所示，這樣會更簡單一些：
restore database;
recover database using backup controlfile until cancel;
alter database open resetlogs;
...
END!!!
