创建表的时候，logseq是32，之后切换了一次日志，到33，此时的表中仍然是有数据的，但是truncate操作后表中的数据就没有了，这个动作基本就是在logseq 34的时候发生的，truncate完以后又切了日志，到了35，我们实验的目的就是要把表空间恢复到logseq=34这个时间点（Time In Point）。根据刚才说的那个例子，就是到故障点8点以前的某个数据未丢失的时间点（5点）
--创建一个auxiliary目录（必要步骤）
[oracle@bak ~]$ mkdir /u01/aux
[oracle@bak ~]$ rman target /
Recovery Manager: Release 10.2.0.1.0 - Production on Fri Dec 26 16:54:36 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: ORA10G (DBID=4175411955)
auxiliary目标目录中会在之后的RMAN脚本执行过程中，生成一些系统恢复需要的文件，等RMAN恢复完后会展示一下这个目录的结构。
--最关键的来了，用RMAN命令进行TSPITR恢复到故障点之前的某个时刻
RMAN> recover tablespace tspitr until logseq 33 auxiliary destination '/u01/aux';
Starting recover at 26-DEC-14
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=159 devtype=DISK
RMAN-05026: WARNING: presuming following set of tablespaces applies to specified point in time
List of tablespaces expected to have UNDO segments --有undo段的表空间列表
tablespace SYSTEM
tablespace UNDOTBS1
Creating automatic instance, with SID='xvBc' --创建一个自动化实例，随机SID为xvBc
initialization parameters used for automatic instance: --为自动化实例分配的参数
db_name=ORA10G
compatible=10.2.0.1.0
db_block_size=8192
db_files=200
db_unique_name=tspitr_ORA10G_xvBc
large_pool_size=1M
shared_pool_size=110M
#No auxiliary parameter file used
db_create_file_dest=/u01/aux --之前创建的auxiliary目录
control_files=/u01/aux/cntrl_tspitr_ORA10G_xvBc.f --控制文件的位置
starting up automatic instance ORA10G --启动自动化实例
Oracle instance started
Total System Global Area 201326592 bytes
Fixed Size 1218508 bytes
Variable Size 146802740 bytes
Database Buffers 50331648 bytes
Redo Buffers 2973696 bytes
Automatic instance created
contents of Memory Script: --第1个内存脚本内容
{
# set the until clause
set until logseq 33 thread 1; --指定的需要恢复到的logseq
# restore the controlfile
restore clone controlfile;
# mount the controlfile
sql clone 'alter database mount clone database';
# archive current online log for tspitr to a resent until time
sql 'alter system archive log current';
# avoid unnecessary autobackups for structural changes during TSPITR
sql 'begin dbms_backup_restore.AutoBackupFlag(FALSE); end;';
}
executing Memory Script
executing command: SET until clause
Starting restore at 26-DEC-14
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: sid=36 devtype=DISK
channel ORA_AUX_DISK_1: starting datafile backupset restore
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: reading from backup piece /u01/orabackup/backupsets/ora10g-c-4175411955-20141226-05.ctl
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/u01/orabackup/backupsets/ora10g-c-4175411955-20141226-05.ctl tag=TAG20141226T164935
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:02
output filename=/u01/aux/cntrl_tspitr_ORA10G_xvBc.f
Finished restore at 26-DEC-14
sql statement: alter database mount clone database
sql statement: alter system archive log current
sql statement: begin dbms_backup_restore.AutoBackupFlag(FALSE); end;
released channel: ORA_DISK_1
released channel: ORA_AUX_DISK_1
contents of Memory Script: --第2个内存脚本内容
{
# generated tablespace point-in-time recovery script
# set the until clause
set until logseq 33 thread 1;
plsql <<<-- tspitr_2
declare
sqlstatement varchar2(512);
offline_not_needed exception;
pragma exception_init(offline_not_needed, -01539);
begin
sqlstatement := 'alter tablespace '|| 'TSPITR' ||' offline for recover';
krmicd.writeMsg(6162, sqlstatement);
krmicd.execSql(sqlstatement);
exception
when offline_not_needed then
null;
end; >>>;
# set an omf destination filename for restore
set newname for clone datafile 1 to new;
# set an omf destination filename for restore
set newname for clone datafile 2 to new;
# set an omf destination tempfile
set newname for clone tempfile 2 to new;
# set a destination filename for restore
set newname for datafile 6 to
"/data/oradata/ora10g/tspitr01.dbf";
# rename all tempfiles
switch clone tempfile all;
# restore the tablespaces in the recovery set plus the auxilliary tablespaces
restore clone datafile 1, 2, 6;
switch clone datafile all;
#online the datafiles restored or flipped
sql clone "alter database datafile 1 online";
#online the datafiles restored or flipped
sql clone "alter database datafile 2 online";
#online the datafiles restored or flipped
sql clone "alter database datafile 6 online";
# make the controlfile point at the restored datafiles, then recover them
recover clone database tablespace "TSPITR", "SYSTEM", "UNDOTBS1" delete archivelog;
alter clone database open resetlogs;
# PLUG HERE the creation of a temporary tablespace if export fails due to lack
# of temporary space.
# For example in Unix these two lines would do that:
#sql clone "create tablespace aux_tspitr_tmp
# datafile ''/tmp/aux_tspitr_tmp.dbf'' size 500K";
}
executing Memory Script
executing command: SET until clause
sql statement: alter tablespace TSPITR offline for recover
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
renamed temporary file 2 to /u01/aux/TSPITR_ORA10G_XVBC/datafile/o1_mf_temp_%u_.tmp in control file
Starting restore at 26-DEC-14
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: sid=39 devtype=DISK
channel ORA_AUX_DISK_1: starting datafile backupset restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/aux/TSPITR_ORA10G_XVBC/datafile/o1_mf_system_%u_.dbf
restoring datafile 00002 to /u01/aux/TSPITR_ORA10G_XVBC/datafile/o1_mf_undotbs1_%u_.dbf
restoring datafile 00006 to /data/oradata/ora10g/tspitr01.dbf
channel ORA_AUX_DISK_1: reading from backup piece /u01/orabackup/backupsets/full_ora10g_14pr577l_1_1
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/u01/orabackup/backupsets/full_ora10g_14pr577l_1_1 tag=TAG20141226T164644
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:02:26
Finished restore at 26-DEC-14
datafile 1 switched to datafile copy
input datafile copy recid=4 stamp=867344300 filename=/u01/aux/TSPITR_ORA10G_XVBC/datafile/o1_mf_system_b9t8nvw3_.dbf
datafile 2 switched to datafile copy
input datafile copy recid=5 stamp=867344300 filename=/u01/aux/TSPITR_ORA10G_XVBC/datafile/o1_mf_undotbs1_b9t8nvx5_.dbf
sql statement: alter database datafile 1 online
sql statement: alter database datafile 2 online
sql statement: alter database datafile 6 online
Starting recover at 26-DEC-14
using channel ORA_AUX_DISK_1
starting media recovery
archive log thread 1 sequence 32 is already on disk as file /oracle/flash_recovery_area/ORA10G/archivelog/2014_12_26/o1_mf_1_32_b9t8dkr8_.arc
channel ORA_AUX_DISK_1: starting archive log restore to default destination
channel ORA_AUX_DISK_1: restoring archive log
archive log thread=1 sequence=31
channel ORA_AUX_DISK_1: reading from backup piece /u01/orabackup/backupsets/arc_ora10g_15pr57ct_1_1
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/u01/orabackup/backupsets/arc_ora10g_15pr57ct_1_1 tag=TAG20141226T164933
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:03
archive log filename=/u01/app/oracle/product/10.2.0/db_1/dbs/arch1_31_860802036.dbf thread=1 sequence=31
channel clone_default: deleting archive log(s)
archive log filename=/u01/app/oracle/product/10.2.0/db_1/dbs/arch1_31_860802036.dbf recid=32 stamp=867344306
archive log filename=/oracle/flash_recovery_area/ORA10G/archivelog/2014_12_26/o1_mf_1_32_b9t8dkr8_.arc thread=1 sequence=32
media recovery complete, elapsed time: 00:00:05
Finished recover at 26-DEC-14
database opened
contents of Memory Script: --第3个内存脚本（逻辑导入导出）
{
# export the tablespaces in the recovery set