Description:
In this article we are going to see table recovery using RMAN backup.
Steps to recover the table using RMAN backup
Step 1:- User creation
SQL> create user dborg identified by "oracle" default tablespace users temporary tablespace temp profile default account unlock User created.
Step 2:- Provide grant privileges and allocate quota for “dborg” user
SQL> grant create session, create table to dborg ; Grant succeeded. SQL> alter user dborg quota 500M on users ; User altered.
Step 3:- Table creation
SQL> conn dborg/oracle SQL> create table emp(id number); Table created. SQL> begin for i in 1 .. 100000 loop insert into emp values(i); end loop; end; / PL/SQL procedure successfully completed. SQL> select count(*) from emp; COUNT(*) ---------- 100000 SQL> SELECT TO_CHAR (SYSDATE, 'MM-DD-YYYY HH24:MI:SS') "NOW" FROM DUAL; NOW ------------------- 08-14-2018 21:53:42
Step 4:- Ensure that database in ARCHIVELOG mode and take a whole database backup
SQL> archive log list Database log mode No Archive Mode Automatic archival Disabled Archive destination /u01/app/oracle/product/18.0.0/dbhome_1/dbs/arch Oldest online log sequence 2 Current log sequence 4 SQL> shut immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount ORACLE instance started. Total System Global Area 1660943808 bytes Fixed Size 8658368 bytes Variable Size 1056964608 bytes Database Buffers 587202560 bytes Redo Buffers 8118272 bytes Database mounted. SQL> alter database archivelog; Database altered. SQL> archive log list Database log mode Archive Mode Automatic archival Enabled Archive destination /u01/app/oracle/product/18.0.0/dbhome_1/dbs/arch Oldest online log sequence 2 Next log sequence to archive 4 Current log sequence 4 SQL> alter database open; Database altered.
You can’t restore a table that hasn’t been backed up, even if it exists in current archive logs.
Take a full database backup
RMAN> backup database plus archivelog; Starting backup at 14-AUG-18 current log archived using channel ORA_DISK_1 channel ORA_DISK_1: starting archived log backup set channel ORA_DISK_1: specifying archived log(s) in backup set input archived log thread=1 sequence=4 RECID=1 STAMP=984173730 input archived log thread=1 sequence=5 RECID=2 STAMP=984173864 input archived log thread=1 sequence=6 RECID=3 STAMP=984173913 input archived log thread=1 sequence=7 RECID=4 STAMP=984174371 input archived log thread=1 sequence=8 RECID=5 STAMP=984174523 channel ORA_DISK_1: starting piece 1 at 14-AUG-18 channel ORA_DISK_1: finished piece 1 at 14-AUG-18 piece handle=/u01/fra/PROD18C/backupset/2018_08_14/o1_mf_annnn_TAG20180814T214843_fq6073xg_.bkp tag=TAG20180814T214843 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03 Finished backup at 14-AUG-18 Starting backup at 14-AUG-18 using channel ORA_DISK_1 channel ORA_DISK_1: starting full datafile backup set channel ORA_DISK_1: specifying datafile(s) in backup set input datafile file number=00001 name=/u01/app/oracle/oradata/PROD18C/system01.dbf input datafile file number=00003 name=/u01/app/oracle/oradata/PROD18C/sysaux01.dbf input datafile file number=00004 name=/u01/app/oracle/oradata/PROD18C/undotbs01.dbf input datafile file number=00007 name=/u01/app/oracle/oradata/PROD18C/users01.dbf channel ORA_DISK_1: starting piece 1 at 14-AUG-18 channel ORA_DISK_1: finished piece 1 at 14-AUG-18 piece handle=/u01/fra/PROD18C/backupset/2018_08_14/o1_mf_nnndf_TAG20180814T214847_fq60774d_.bkp tag=TAG20180814T214847 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:45 Finished backup at 14-AUG-18 Starting backup at 14-AUG-18 current log archived using channel ORA_DISK_1 channel ORA_DISK_1: starting archived log backup set channel ORA_DISK_1: specifying archived log(s) in backup set input archived log thread=1 sequence=9 RECID=6 STAMP=984174572 channel ORA_DISK_1: starting piece 1 at 14-AUG-18 channel ORA_DISK_1: finished piece 1 at 14-AUG-18 piece handle=/u01/fra/PROD18C/backupset/2018_08_14/o1_mf_annnn_TAG20180814T214932_fq608ndg_.bkp tag=TAG20180814T214932 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01 Finished backup at 14-AUG-18 Starting Control File and SPFILE Autobackup at 14-AUG-18 piece handle=/u01/fra/PROD18C/autobackup/2018_08_14/o1_mf_s_984174573_fq608owz_.bkp comment=NONE Finished Control File and SPFILE Autobackup at 14-AUG-18
Step 5:- Drop the table
SQL> drop table dborg.emp; Table dropped. SQL> select * from dborg.emp; no rows selected.
Step 6:- Recover emp table
RMAN> recover table dborg.emp until time "to_date('2018-08-14 21:53:42','yyyy-mm-dd:hh24:mi:ss')" auxiliary destination '/u01/fra';
Starting recover at 14-AUG-18
using target database control file instead of recovery catalog
current log archived
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=72 device type=DISK
RMAN-05026: warning: presuming following set of tablespaces applies to specified point-in-time
List of tablespaces expected to have UNDO segments
Tablespace SYSTEM
Tablespace UNDOTBS1
Creating automatic instance, with SID='sAyh'
initialization parameters used for automatic instance:
db_name=PROD18C
db_unique_name=sAyh_pitr_PROD18C
compatible=18.0.0
db_block_size=8192
db_files=200
diagnostic_dest=/u01/app/oracle
_system_trig_enabled=FALSE
sga_target=1584M
processes=200
db_create_file_dest=/u01/fra
log_archive_dest_1='location=/u01/fra'
#No auxiliary parameter file used
starting up automatic instance PROD18C
Oracle instance started
Total System Global Area 1660943808 bytes
Fixed Size 8658368 bytes
Variable Size 419430400 bytes
Database Buffers 1224736768 bytes
Redo Buffers 8118272 bytes
Automatic instance created
contents of Memory Script:
{
# set requested point in time
set until time "to_date('2018-08-14 21:53:42','yyyy-mm-dd:hh24:mi:ss')";
# restore the controlfile
restore clone controlfile;
# mount the controlfile
sql clone 'alter database mount clone database';
# archive current online log
sql 'alter system archive log current';
}
executing Memory Script
executing command: SET until clause
Starting restore at 14-AUG-18
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=8 device type=DISK
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: reading from backup piece /u01/fra/PROD18C/autobackup/2018_08_14/o1_mf_s_984174811_fq60j3or_.bkp
channel ORA_AUX_DISK_1: piece handle=/u01/fra/PROD18C/autobackup/2018_08_14/o1_mf_s_984174811_fq60j3or_.bkp tag=TAG20180814T215331
channel ORA_AUX_DISK_1: restored backup piece 1
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/u01/fra/PROD18C/controlfile/o1_mf_fq60txkl_.ctl
Finished restore at 14-AUG-18
sql statement: alter database mount clone database
sql statement: alter system archive log current
contents of Memory Script:
{
# set requested point in time
set until time "to_date('2018-08-14 21:53:42','yyyy-mm-dd:hh24:mi:ss')";
# set destinations for recovery set and auxiliary set datafiles
set newname for clone datafile 1 to new;
set newname for clone datafile 4 to new;
set newname for clone datafile 3 to new;
set newname for clone tempfile 1 to new;
# switch all tempfiles
switch clone tempfile all;
# restore the tablespaces in the recovery set and the auxiliary set
restore clone datafile 1, 4, 3;
switch clone datafile all;
}
executing Memory Script
executing command: SET until clause
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
renamed tempfile 1 to /u01/fra/PROD18C/datafile/o1_mf_temp_%u_.tmp in control file
Starting restore at 14-AUG-18
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring datafile 00001 to /u01/fra/PROD18C/datafile/o1_mf_system_%u_.dbf
channel ORA_AUX_DISK_1: restoring datafile 00004 to /u01/fra/PROD18C/datafile/o1_mf_undotbs1_%u_.dbf
channel ORA_AUX_DISK_1: restoring datafile 00003 to /u01/fra/PROD18C/datafile/o1_mf_sysaux_%u_.dbf
channel ORA_AUX_DISK_1: reading from backup piece /u01/fra/PROD18C/backupset/2018_08_14/o1_mf_nnndf_TAG20180814T215243_fq60gmvn_.bkp
channel ORA_AUX_DISK_1: piece handle=/u01/fra/PROD18C/backupset/2018_08_14/o1_mf_nnndf_TAG20180814T215243_fq60gmvn_.bkp tag=TAG20180814T215243
channel ORA_AUX_DISK_1: restored backup piece 1
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:01:17
Finished restore at 14-AUG-18
datafile 1 switched to datafile copy
input datafile copy RECID=4 STAMP=984175242 file name=/u01/fra/PROD18C/datafile/o1_mf_system_fq60v51s_.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=5 STAMP=984175242 file name=/u01/fra/PROD18C/datafile/o1_mf_undotbs1_fq60v52y_.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=6 STAMP=984175242 file name=/u01/fra/PROD18C/datafile/o1_mf_sysaux_fq60v52l_.dbf
contents of Memory Script:
{
# set requested point in time
set until time "to_date('2018-08-14 21:53:42','yyyy-mm-dd:hh24:mi:ss')";
# online the datafiles restored or switched
sql clone "alter database datafile 1 online";
sql clone "alter database datafile 4 online";
sql clone "alter database datafile 3 online";
# recover and open database read only
recover clone database tablespace "SYSTEM", "UNDOTBS1", "SYSAUX";
sql clone 'alter database open read only';
}
executing Memory Script
executing command: SET until clause
sql statement: alter database datafile 1 online
sql statement: alter database datafile 4 online
sql statement: alter database datafile 3 online
Starting recover at 14-AUG-18
using channel ORA_AUX_DISK_1
starting media recovery
archived log for thread 1 with sequence 11 is already on disk as file /u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_11_fq60j1vs_.arc
archived log for thread 1 with sequence 12 is already on disk as file /u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_12_fq60t0xc_.arc
archived log file name=/u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_11_fq60j1vs_.arc thread=1 sequence=11
archived log file name=/u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_12_fq60t0xc_.arc thread=1 sequence=12
media recovery complete, elapsed time: 00:00:01
Finished recover at 14-AUG-18
sql statement: alter database open read only
contents of Memory Script:
{
sql clone "create spfile from memory";
shutdown clone immediate;
startup clone nomount;
sql clone "alter system set control_files =
''/u01/fra/PROD18C/controlfile/o1_mf_fq60txkl_.ctl'' comment=
''RMAN set'' scope=spfile";
shutdown clone immediate;
startup clone nomount;
# mount database
sql clone 'alter database mount clone database';
}
executing Memory Script
sql statement: create spfile from memory
database closed
database dismounted
Oracle instance shut down
connected to auxiliary database (not started)
Oracle instance started
Total System Global Area 1660943808 bytes
Fixed Size 8658368 bytes
Variable Size 419430400 bytes
Database Buffers 1224736768 bytes
Redo Buffers 8118272 bytes
sql statement: alter system set control_files = ''/u01/fra/PROD18C/controlfile/o1_mf_fq60txkl_.ctl'' comment= ''RMAN set'' scope=spfile
Oracle instance shut down
connected to auxiliary database (not started)
Oracle instance started
Total System Global Area 1660943808 bytes
Fixed Size 8658368 bytes
Variable Size 419430400 bytes
Database Buffers 1224736768 bytes
Redo Buffers 8118272 bytes
sql statement: alter database mount clone database
contents of Memory Script:
{
# set requested point in time
set until time "to_date('2018-08-14 21:53:42','yyyy-mm-dd:hh24:mi:ss')";
# set destinations for recovery set and auxiliary set datafiles
set newname for datafile 7 to new;
# restore the tablespaces in the recovery set and the auxiliary set
restore clone datafile 7;
switch clone datafile all;
}
executing Memory Script
executing command: SET until clause
executing command: SET NEWNAME
Starting restore at 14-AUG-18
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=34 device type=DISK
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring datafile 00007 to /u01/fra/SAYH_PITR_PROD18C/datafile/o1_mf_users_%u_.dbf
channel ORA_AUX_DISK_1: reading from backup piece /u01/fra/PROD18C/backupset/2018_08_14/o1_mf_nnndf_TAG20180814T215243_fq60gmvn_.bkp
channel ORA_AUX_DISK_1: piece handle=/u01/fra/PROD18C/backupset/2018_08_14/o1_mf_nnndf_TAG20180814T215243_fq60gmvn_.bkp tag=TAG20180814T215243
channel ORA_AUX_DISK_1: restored backup piece 1
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:03
Finished restore at 14-AUG-18
datafile 7 switched to datafile copy
input datafile copy RECID=8 STAMP=984175357 file name=/u01/fra/SAYH_PITR_PROD18C/datafile/o1_mf_users_fq6112n9_.dbf
contents of Memory Script:
{
# set requested point in time
set until time "to_date('2018-08-14 21:53:42','yyyy-mm-dd:hh24:mi:ss')";
# online the datafiles restored or switched
sql clone "alter database datafile 7 online";
# recover and open resetlogs
recover clone database tablespace "USERS", "SYSTEM", "UNDOTBS1", "SYSAUX" delete archivelog;
alter clone database open resetlogs;
}
executing Memory Script
executing command: SET until clause
sql statement: alter database datafile 7 online
Starting recover at 14-AUG-18
using channel ORA_AUX_DISK_1
starting media recovery
archived log for thread 1 with sequence 11 is already on disk as file /u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_11_fq60j1vs_.arc
archived log for thread 1 with sequence 12 is already on disk as file /u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_12_fq60t0xc_.arc
archived log file name=/u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_11_fq60j1vs_.arc thread=1 sequence=11
archived log file name=/u01/fra/PROD18C/archivelog/2018_08_14/o1_mf_1_12_fq60t0xc_.arc thread=1 sequence=12
media recovery complete, elapsed time: 00:00:00
Finished recover at 14-AUG-18
database opened
contents of Memory Script:
{
# create directory for datapump import
sql "create or replace directory TSPITR_DIROBJ_DPDIR as ''
/u01/fra''";
# create directory for datapump export
sql clone "create or replace directory TSPITR_DIROBJ_DPDIR as ''
/u01/fra''";
}
executing Memory Script
sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/u01/fra''
sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/u01/fra''
Performing export of tables...
EXPDP> Starting "SYS"."TSPITR_EXP_sAyh_zwzh":
EXPDP> Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
EXPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
EXPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
EXPDP> Processing object type TABLE_EXPORT/TABLE/TABLE
EXPDP> . . exported "DBORG"."EMP" 873.1 KB 100000 rows
EXPDP> Master table "SYS"."TSPITR_EXP_sAyh_zwzh" successfully loaded/unloaded
EXPDP> ******************************************************************************
EXPDP> Dump file set for SYS.TSPITR_EXP_sAyh_zwzh is:
EXPDP> /u01/fra/tspitr_sAyh_75879.dmp
EXPDP> Job "SYS"."TSPITR_EXP_sAyh_zwzh" successfully completed at Tue Aug 14 22:06:43 2018 elapsed 0 00:02:52
Export completed
contents of Memory Script:
{
# shutdown clone before import
shutdown clone abort
}
executing Memory Script
Oracle instance shut down
Performing import of tables...
IMPDP> Master table "SYS"."TSPITR_IMP_sAyh_zBwj" successfully loaded/unloaded
IMPDP> Starting "SYS"."TSPITR_IMP_sAyh_zBwj":
IMPDP> Processing object type TABLE_EXPORT/TABLE/TABLE
IMPDP> Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
IMPDP> . . imported "DBORG"."EMP" 873.1 KB 100000 rows
IMPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
IMPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
IMPDP> Job "SYS"."TSPITR_IMP_sAyh_zBwj" successfully completed at Tue Aug 14 22:07:30 2018 elapsed 0 00:00:35
Import completed
Removing automatic instance
Automatic instance removed
auxiliary instance file /u01/fra/PROD18C/datafile/o1_mf_temp_fq60xs6s_.tmp deleted
auxiliary instance file /u01/fra/SAYH_PITR_PROD18C/onlinelog/o1_mf_3_fq611jxw_.log deleted
auxiliary instance file /u01/fra/SAYH_PITR_PROD18C/onlinelog/o1_mf_2_fq6118dc_.log deleted
auxiliary instance file /u01/fra/SAYH_PITR_PROD18C/onlinelog/o1_mf_1_fq61189k_.log deleted
auxiliary instance file /u01/fra/SAYH_PITR_PROD18C/datafile/o1_mf_users_fq6112n9_.dbf deleted
auxiliary instance file /u01/fra/PROD18C/datafile/o1_mf_sysaux_fq60v52l_.dbf deleted
auxiliary instance file /u01/fra/PROD18C/datafile/o1_mf_undotbs1_fq60v52y_.dbf deleted
auxiliary instance file /u01/fra/PROD18C/datafile/o1_mf_system_fq60v51s_.dbf deleted
auxiliary instance file /u01/fra/PROD18C/controlfile/o1_mf_fq60txkl_.ctl deleted
auxiliary instance file tspitr_sAyh_75879.dmp deleted
Finished recover at 14-AUG-18
Step 7:- Check the table count
SQL> select count(*) from dborg.emp; COUNT(*) --------- 100000