[12C] new feature: using RMAN to recover tables or table partitions

Time:2021-2-20

When a table is misoperated, such as deleting data, drop table, or truncate table, we can restore it by using flashback table, flashback drop, or tspitr. However, in the following scenarios, the above recovery technology will be helpless:

  • The table logic is damaged or the purge option is used to delete;
  • When Undo is not available, the flashback technology cannot be used to recover the table;
  • After misoperation of the table, the DDL operation is performed;
  • Using tspitr, all objects in the table space will be recovered, which is not conducive to the scenario of only recovering some tables.

Starting from Oracle 12C, Oracle introduces the recovery of tables and table partitions from RMAN backup, which greatly simplifies the recovery of tables and table partitions. This article will demonstrate this new feature.

1 backup database

[[email protected] ~]$ rman target /



Recovery Manager: Release 12.1.0.2.0 - Production on Sun May 3 16:15:03 2020



Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.



connected to target database: ORCL (DBID=1567069190)



RMAN> backup database;

------------------------------------------------The backup process is omitted----------------------------------------------

2 create test data

SQL> create table alen(id number,name varchar2(100));



Table created.



SQL> insert into alen values(1,'Alen');



1 row created.



SQL> commit;



Commit complete.

SQL> drop table alen purge;



Table dropped.



SQL> show recyclebin;

3 using RMAN backup for recovery

RMAN> recover table scott.alen

2> until time '2020-05-03 16:38:03'

3> auxiliary destination '/home/oracle/recover'

4> datapump destination '/home/oracle/dumpfiles'

5> dump file 'scott.alen.dat'

6> notableimport;

For the recover table syntax, please refer to:https://docs.oracle.com/database/121/RCMRF/rcmsynta2001.htm#GUID-CA98040F-9865-4F4F-BAF2-91C518612E95

4 view dump file

[[email protected] ~]$ ll dumpfiles/

total 140

-rw-r----- 1 oracle oinstall 143360 May 3 16:44 scott.alen.dat

5 import with impdp

[[email protected] ~]$ cd /u01/app/oracle/admin/ORCL/dpdump/

[[email protected] dpdump]$ cp /home/oracle/dumpfiles/scott.alen.dat ./

[[email protected] dpdump]$ ll

total 144

-rw-r-----. 1 oracle oinstall 116 May 1 19:19 dp.log

-rw-r----- 1 oracle oinstall 143360 May 3 16:48 scott.alen.dat

[[email protected] dpdump]$ impdp system/system directory=DATA_PUMP_DIR dumpfile=scott.alen.dat tables=scott.alen



Import: Release 12.1.0.2.0 - Production on Sun May 3 16:53:14 2020



Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.



Connected to: Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

Master table "SYSTEM"."SYS_IMPORT_TABLE_01" successfully loaded/unloaded

Starting "SYSTEM"."SYS_IMPORT_TABLE_01": system/******** directory=DATA_PUMP_DIR dumpfile=scott.alen.dat tables=scott.alen

Processing object type TABLE_EXPORT/TABLE/TABLE

Processing object type TABLE_EXPORT/TABLE/TABLE_DATA

. . imported "SCOTT"."ALEN" 5.476 KB 1 rows

Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS

Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER

Job "SYSTEM"."SYS_IMPORT_TABLE_01" successfully completed at Sun May 3 16:53:20 2020 elapsed 0 00:00:03

6 validation results

SQL> select * from alen;



ID NAME

---------- ----------------------------------------------------------------------------------------------------

1 Alen

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