ORACLE 11.2.0.3 生成awr html文件报SYS.DBMS_WORKLOAD_REPOSITORY异常

在想分析数据库性能的关键时刻,突然发现awr不能正常的工作,那就和你上了战场突然发现枪没有子弹一样的郁闷,今天就遇到了11.2.0.3在win的环境中awr生成html不能正常工作.通过查询mos发现该问题出现在各种平台中(win,linux,aix等),提醒大家注意该问题.
数据库版本

SQL> SELECT * FROM V$VERSION;
BANNER
-------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for 32-bit Windows: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

awr报错(html)

SQL> @?/rdbms/admin/awrrpt.sql
ORA-06502: PL/SQL: 数字或值错误 :  字符串缓冲区太小
ORA-06512: 在 "SYS.DBMS_WORKLOAD_REPOSITORY", line 919
ORA-06512: 在 line 1

设置errorstack

SQL> alter session set events '6502 trace name errorstack level 12';
会话已更改。

分析错误

----- Error Stack Dump -----
ORA-06502: PL/SQL: 数字或值错误 :  字符串缓冲区太小
----- Current SQL Statement for this session (sql_id=572fbaj0fdw2b) -----
select output from table(dbms_workload_repository.awr_report_html( :dbid,
                                                            :inst_num,
                                                            :bid, :eid,
                                                            :rpt_options ))
----- PL/SQL Call Stack -----
  object      line  object
  handle    number  name
94348684       919  package body SYS.DBMS_WORKLOAD_REPOSITORY
983BAD54         1  anonymous block
----- Call Stack Trace -----
_skdstdst()+121      CALLrel  _kgdsdst()           19D99520 2
_ksedst1()+93        CALLrel  _skdstdst()          19D99520 0 1 485816 4863B2
                                                   485816
_ksedst()+49         CALLrel  _ksedst1()           0 1
_dbkedDefDump()+368  CALLrel  _ksedst()            0
6
_ksedmp()+44         CALLrel  _dbkedDefDump()      C 0
_dbkdaKsdActDriver(  CALLreg  00000000             C
)+4209
…………

通过查询mos发现Bug 13575143一致，可以确定是该bug,但是通过进一步测试证明不光是awrrpt会出现该错误,awr的相关报告中,只要是展示html结果的都有可能出现类此错误(比如awrrpti.sql/awrddrpt.sql/awrddrpi.sql等等).同时这里通过进一步分析发现其实该bug的起源是Bug 6458801(REPLACE on a CLOB can corrupt multibyte data ID 6458801.8),不过该bug说明已经在11.2.0.1中修复,其实通过这里的分析发现并没有真正的在11.2.0.3中修复该bug,针对该问题没有官方没有提供较好解决方法,只能是用过WORKAROUND来临时解决

They are able to generate the AWR report in the .txt format

重建DBMS_STATS包

数据库版本

SQL> select * from v$version;
BANNER
-------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

执行DBMS_STATS报错

SQL> exec dbms_stats.GATHER_TABLE_STATS('CHF','T_XIFENFEI');
begin sys.dbms_stats.GATHER_TABLE_STATS('CHF','T_XIFENFEI');; end;
ORA-04063: package body "SYS.DBMS_STATS" 有错误
ORA-06508: PL/SQL: 无法找到正在调用 : "SYS.DBMS_STATS" 的程序单元
ORA-06512: 在 line 2

重建DBMS_STATS包

SQL> drop package DBMS_STATS;
Package dropped.
SQL> @?/rdbms/admin/dbmsstat.sql
Package created.
No errors.
Synonym created.
Grant succeeded.
create role gather_system_statistics
            *
ERROR at line 1:
ORA-01921: role name 'GATHER_SYSTEM_STATISTICS' conflicts with another user or
role name
Grant succeeded.
Grant succeeded.
Library created.
SQL> @?/rdbms/admin/prvtstas.plb
Package created.
No errors.
SQL> @?/rdbms/admin/prvtstai.plb
Package body created.
No errors.
SQL> @?/rdbms/admin/prvtstat.plb
Package body created.
No errors.

重新执行DBMS_STATS

SQL> exec dbms_stats.GATHER_TABLE_STATS('CHF','T_XIFENFEI');
PL/SQL procedure successfully completed.

补充说明
1.建议数据库在restricted模式下执行重建DBMS_STATS相关脚本
2.对于11g以前版本,具体参考1310365.1

SQL> @?/rdbms/admin/dbmsstat.sql
SQL> @?/rdbms/admin/prvtstas.plb
SQL> @?/rdbms/admin/prvtstat.plb

TTS实现跨版本迁移数据

以前对Transportable Tablespaces(TTS)一直理解不深,今天无意中看到TTS可以实现数据库升级,今天测试了实现使用TTS 迁移9.2.0.4的一个表空间到11.2.0.3,平台均为Linux 32位
源端版本

SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
PL/SQL Release 9.2.0.4.0 - Production
CORE    9.2.0.3.0       Production
TNS for Linux: Version 9.2.0.4.0 - Production
NLSRTL Version 9.2.0.4.0 - Production

创建测试环境

SQL> create tablespace tts_xff
  2  datafile '/u01/oracle/oradata/xifenfei/tts_xifenfei01.dbf' size 10m autoextend on next 10m,
  3  '/u01/oracle/oradata/xifenfei/tts_xifenfei02.dbf' size 10m autoextend on next 10m
  4  ;
Tablespace created.
SQL> create user tts_xff identified by xifenfei;
User created.
SQL> grant dba to tts_xff;
Grant succeeded.
SQL> conn tts_xff/xifenfei
Connected.
SQL> create table t1 tablespace tts_xff
  2  as
  3  select * from dba_objects;
Table created.
SQL> create table t2 tablespace tts_xff
  2  as
  3  select * from dba_objects;
Table created.
SQL> create table t_xifenfei  tablespace tts_xff
  2  as
  3  select * from dba_objects;
Table created.
SQL> select * from tab;
TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
T1                             TABLE
T2                             TABLE
T_XIFENFEI                     TABLE
SQL> select count(*) from t1;
  COUNT(*)
----------
     30805
SQL> conn / as sysdba
Connected.
SQL> alter tablespace tts_xff read only;
Tablespace altered.

导出并传输测试表空间

[oracle@xifenfei ~]$ exp userid=\'/ as sysdba\' tablespaces=tts_xff file=/tmp/tts_xff.dmp transport_tablespace=y
Export: Release 9.2.0.4.0 - Production on Sun Oct 7 04:53:25 2012
Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.
Connected to: Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production
Export done in ZHS16GBK character set and AL16UTF16 NCHAR character set
Note: table data (rows) will not be exported
About to export transportable tablespace metadata...
For tablespace TTS_XFF ...
. exporting cluster definitions
. exporting table definitions
. . exporting table                             T1
. . exporting table                             T2
. . exporting table                     T_XIFENFEI
. exporting referential integrity constraints
. exporting triggers
. end transportable tablespace metadata export
Export terminated successfully without warnings.
[oracle@xifenfei ~]$ scp /tmp/tts_xff.dmp 192.168.1.10:/tmp/
oracle@192.168.1.10's password:
tts_xff.dmp                                                       100%   16KB  16.0KB/s   00:00
[oracle@xifenfei ~]$ scp /u01/oracle/oradata/xifenfei/tts_xifenfei* 192.168.1.10:/u01/oracle/oradata/ora11g/
oracle@192.168.1.10's password:
tts_xifenfei01.dbf                                                100%   10MB   3.3MB/s   00:03
tts_xifenfei02.dbf                                                100%   10MB   5.0MB/s   00:02

目标库版本

SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

创建用户

SQL> create user tts_11g identified by xifenfei;
User created.
SQL> grant dba to tts_11g;
Grant succeeded.

导入表空间

[oracle@xifenfei ~]$ imp userid=\'/ as sysdba\' tablespaces=tts_xff file=/tmp/tts_xff.dmp
> transport_tablespace=y datafiles=/u01/oracle/oradata/ora11g/tts_xifenfei01.dbf,
> /u01/oracle/oradata/ora11g/tts_xifenfei02.dbf fromuser=tts_xff touser=tts_11g
Import: Release 11.2.0.3.0 - Production on Sat Sep 29 04:18:04 2012
Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export file created by EXPORT:V09.02.00 via conventional path
About to import transportable tablespace(s) metadata...
import done in ZHS16GBK character set and AL16UTF16 NCHAR character set
. importing TTS_XFF's objects into TTS_11G
. . importing table                           "T1"
. . importing table                           "T2"
. . importing table                   "T_XIFENFEI"
Import terminated successfully without warnings.

测试数据

SQL> alter tablespace tts_xff read write;
Tablespace altered.
SQL> conn tts_11g/xifenfei
Connected.
SQL> select * from tab;
TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
T1                             TABLE
T2                             TABLE
T_XIFENFEI                     TABLE
SQL> select count(*) from t1;
  COUNT(*)
----------
     30805
SQL> delete from t1;
30805 rows deleted.
SQL> commit;
Commit complete.

至此测试完成，证明使用tts可以实现跨版本迁移数据

补充说明
1.10g及其以上版本可以实现不同平台的tts迁移，可能需要使用rman convert转换
2.迁移前需要使用 EXECUTE DBMS_TTS.TRANSPORT_SET_CHECK检测依赖性

如何查询会话 event

很多时候，我们在数据库中设置了event,如何确认设置的event生效或者如何确认你的库中设置了什么event.下面的文章测试了在11g中比较方便的方法
数据库版本

SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Solaris: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

设置测试event

SQL> alter session set events '10510 trace name context forever,level 1';
Session altered.
SQL> alter session set events
  2  '10046 trace name context forever,level 4';
Session altered.
SQL> alter system set events '60025 trace name context forever';
System altered.
SQL> alter system set events '10513 trace name context forever,level 2';
System altered.

测试spfile参数中是否有event

SQL> create pfile='/tmp/pfile' from spfile;
File created.
solaris*orcl-/home/oracle$ grep -i event /tmp/pfile
--无记录
SQL> show parameter event;
NAME                                 TYPE        VALUE
------------------------------------ ----------- -----------------
event                                string
xml_db_events                        string      enable

证明设置event不会在spfile中记录

查询会话event

--dbms_system实现
SQL> set serveroutput on size 1000000
SQL> declare
  2  event_level number;
  3  begin
  4  for i in 1..100000 loop
  5  sys.dbms_system.read_ev(i,event_level);
  6  if (event_level > 0) then
  7  dbms_output.put_line('Event '||to_char(i)||' set at level '||
  8  to_char(event_level));
  9  end if;
 10  end loop;
 11  end;
 12  /
Event 10510 set at level 1
Event 10513 set at level 2
Event 60025 set at level 1
PL/SQL procedure successfully completed.
--oradebug实现
SQL> oradebug SETMYPID
Statement processed.
SQL> oradebug eventdump session
10510 trace name context forever,level 1
10513 trace name context forever,level 2
60025 trace name context forever
sql_trace level=4

测试证明使用dbms_system可以捕获到event,oradebug可以捕获到本身会话,还可以通过setospid/setorapid来跟踪其他会话的event设置情况.event 10046对应的本质是sql_trace所以使用dbms_system不能捕获到10046

commit后lob字段使用临时表空间未释放

临时表空间被使用现状
接到客户反馈,他们的数据库使用了长连接,临时表空间使用率一直不下降,一个会话占用了几百M甚至几个G的临时表空间不释放,随着时间的积累,会话占用的临时表空间还在继续增加,最终的现象是100G的数据文件,160G的临时表空间还在继续报临时表空间不足.查询v$sort_usage发现其SEGTYPE全部为LOB_DATA而CONTENTS为TEMPORARY,而且BLOCKS都很大,通过上面的信息大概分析,怀疑是因为数据库查询或者操作LOB类型时候使用了TEMPORARY,但是没有释放导致

相关版本信息

OS:AIX 6.1(64)
DB:10.2.0.5

测试案例证明

--执行查询脚本
$ more check.sql
connect / as sysdba
select * from v$tempseg_usage where username not in ('HDDS_CLPS_DTA','FOGLIGHT');
--测试脚本1
$ more test1.sh
sqlplus /nolog <<EOF
connect / as sysdba
drop user xifenfei cascade;
create user xifenfei identified by tc
default tablespace users temporary tablespace temp quota unlimited on users;
grant connect,resource,alter session to xifenfei;
revoke unlimited tablespace from xifenfei;
connect xifenfei/tc
select to_nclob('a') from dual;
!sqlplus /nolog @check
commit;
!sqlplus /nolog @check
EOF
--测试脚本2
$ more test2.sh
sqlplus /nolog << EOF2
connect xifenfei/tc
alter session set events '60025 trace name context forever';
select to_nclob('a') from dual;
!sqlplus /nolog @check
commit;
!sqlplus /nolog @check
EOF2

测试结果

$ ./test1.sh
SQL*Plus: Release 10.2.0.5.0 - Production on Fri Oct 12 10:04:39 2012
Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.
SQL> Connected.
SQL> drop user xifenfei cascade
          *
ERROR at line 1:
ORA-01918: user 'XIFENFEI' does not exist
Grant succeeded.
SQL>
Revoke succeeded.
SQL> SQL> SQL> Connected.
SQL>
TO_NCLOB('A')
--------------------------------------------------------------------------------
a
SQL> SQL>
SQL*Plus: Release 10.2.0.5.0 - Production on Fri Oct 12 10:04:39 2012
Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.
Connected.
USERNAME                       USER                           SESSION_ADDR
------------------------------ ------------------------------ ----------------
SESSION_NUM SQLADDR             SQLHASH SQL_ID
----------- ---------------- ---------- -------------
TABLESPACE                      CONTENTS  SEGTYPE     SEGFILE#    SEGBLK#
------------------------------- --------- --------- ---------- ----------
   EXTENTS     BLOCKS   SEGRFNO#
---------- ---------- ----------
xifenfei                           xifenfei                           07000002F96ECB30
      10152 07000002AE1C36E0 1362191183 9z69tsx8m2sug
TEMP                            TEMPORARY LOB_DATA         201       3465
         1        128          1
SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> SQL>
Commit complete.
SQL> SQL>
SQL*Plus: Release 10.2.0.5.0 - Production on Fri Oct 12 10:04:39 2012
Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.
Connected.
USERNAME                       USER                           SESSION_ADDR
------------------------------ ------------------------------ ----------------
SESSION_NUM SQLADDR             SQLHASH SQL_ID
----------- ---------------- ---------- -------------
TABLESPACE                      CONTENTS  SEGTYPE     SEGFILE#    SEGBLK#
------------------------------- --------- --------- ---------- ----------
   EXTENTS     BLOCKS   SEGRFNO#
---------- ---------- ----------
xifenfei                           xifenfei                           07000002F96ECB30
      10152 07000002AE1C36E0 1362191183 9z69tsx8m2sug
TEMP                            TEMPORARY LOB_DATA         201       3465
         1        128          1
SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
--测试脚本2
$ ./test2.sh
SQL*Plus: Release 10.2.0.5.0 - Production on Fri Oct 12 10:03:56 2012
Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.
SQL> Connected.
SQL>
Session altered.
SQL>
TO_NCLOB('A')
--------------------------------------------------------------------------------
a
SQL> SQL>
SQL*Plus: Release 10.2.0.5.0 - Production on Fri Oct 12 10:03:56 2012
Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.
Connected.
no rows selected
SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> SQL>
Commit complete.
SQL> SQL>
SQL*Plus: Release 10.2.0.5.0 - Production on Fri Oct 12 10:03:56 2012
Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.
Connected.
no rows selected
SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

1.Without event 60025 set (before and after commit):都出现v$tempseg_usage中存在对应记录,而且提交后不能释放Temp LOB space
2.With event 60025 set (before and after commit):都未现v$tempseg_usage中存在对应记录,证明提交后释放Temp LOB space

解决方案
通过上面的试验证明我们可以通过设置event 60025来解决该版本的会话提交后Temp LOB space不能被回收的问题.
我们可以通过在session级别使用”alter session set events ‘60025 trace name context forever’;”来实现。如果想实现全库级别的，但是因为event 60025不能通过system设置生效,所以我们可以通过logon触发器来实现该功能

create or replace trigger sys.login_db after logon on database
begin
execute immediate 'alter session set events ''60025 trace name context forever''';
end;
/

注意这个是ORCLE bug(Bug 5723140 – Temp LOB space not released after commit [ID 5723140.8]),从10.2.0.4开始虽然已经修复了该bug,但是默认情况下:为了更加高效的利用temp,在session未断开前,不自动释放temp 空间,可以通过设置event 60025来强制会话在commit之后就立即释放temp space

recover遇到坏块处理本质探讨

如果在还原出来的数据文件中有坏块,而归档日志和联机日志是正常的,那么在应用日志恢复过程中,会出现什么情况,这里通过一个简单的测试给予其中一种情况的说明
创建测试表

SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Prod
PL/SQL Release 10.2.0.4.0 - Production
CORE    10.2.0.4.0      Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
SQL> create table t_xifenfei(object_id,object_name) tablespace xifenfei
  2  as
  3  select object_id,object_name from dba_objects
  4  where rownum<11;
Table created.
SQL> col object_name for a30
SQL> select   object_id,object_name,
  2   dbms_rowid.rowid_relative_fno(rowid)rel_fno,
  3  dbms_rowid.rowid_block_number(rowid)blockno
  4   from chf.t_xifenfei;
 OBJECT_ID OBJECT_NAME                       REL_FNO    BLOCKNO
---------- ------------------------------ ---------- ----------
        20 ICOL$                                   5         12
        44 I_USER1                                 5         12
        28 CON$                                    5         12
        15 UNDO$                                   5         12
        29 C_COBJ#                                 5         12
         3 I_OBJ#                                  5         12
        25 PROXY_ROLE_DATA$                        5         12
        39 I_IND1                                  5         12
        51 I_CDEF2                                 5         12
        26 I_PROXY_ROLE_DATA$_1                    5         12
10 rows selected.
SQL> select name from v$datafile where file#=5;
NAME
--------------------------------------------------------------
/u01/oracle/oradata/XFF/xifenfei01.dbf
SQL> update t_xifenfei set object_name='WWW.XIFENFEI.COM';
10 rows updated.
SQL> commit;
Commit complete.
SQL> create table t_xifenfei_new(object_id,object_name) tablespace xifenfei
  2  as
  3  select object_id,object_name from dba_objects
  4  where rownum<11;
Table created.
SQL> conn / as sysdba
Connected.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

备份数据文件

[oracle@xifenfei XFF]$ cp xifenfei01.dbf  ../tmp/
[oracle@xifenfei XFF]$ ll ../tmp/xifenfei01.dbf
-rw-r----- 1 oracle oinstall 10493952 Sep 28 19:05 ../tmp/xifenfei01.dbf
[oracle@xifenfei XFF]$ date
Fri Sep 28 19:05:42 CST 2012

bbed破坏备份文件

[oracle@xifenfei XFF]$ bbed password=blockedit
BBED: Release 2.0.0.0.0 - Limited Production on Fri Sep 28 19:05:59 2012
Copyright (c) 1982, 2007, Oracle.  All rights reserved.
************* !!! For Oracle Internal Use only !!! ***************
BBED> set filename '/u01/oracle/oradata/tmp/xifenfei01.dbf'
        FILENAME        /u01/oracle/oradata/tmp/xifenfei01.dbf
BBED> set block 12
        BLOCK#          12
BBED> set mode edit
        MODE            Edit
BBED> map
 File: /u01/oracle/oradata/tmp/xifenfei01.dbf (0)
 Block: 12                                    Dba:0x00000000
------------------------------------------------------------
 KTB Data Block (Table/Cluster)
 struct kcbh, 20 bytes                      @0
 struct ktbbh, 96 bytes                     @20
 struct kdbh, 14 bytes                      @124
 struct kdbt[1], 4 bytes                    @138
 sb2 kdbr[10]                               @142
 ub1 freespace[7666]                        @162
 ub1 rowdata[360]                           @7828
 ub4 tailchk                                @8188
BBED> p kcbh
struct kcbh, 20 bytes                       @0
   ub1 type_kcbh                            @0        0x06
   ub1 frmt_kcbh                            @1        0xa2
   ub1 spare1_kcbh                          @2        0x00
   ub1 spare2_kcbh                          @3        0x00
   ub4 rdba_kcbh                            @4        0x0140000c
   ub4 bas_kcbh                             @8        0x0004d7b0
   ub2 wrp_kcbh                             @12       0x000a
   ub1 seq_kcbh                             @14       0x01
   ub1 flg_kcbh                             @15       0x06 (KCBHFDLC, KCBHFCKV)
   ub2 chkval_kcbh                          @16       0xe573
   ub2 spare3_kcbh                          @18       0x0000
BBED> d offset 8188
 File: /u01/oracle/oradata/tmp/xifenfei01.dbf (0)
 Block: 12               Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 0106b0d7
 <32 bytes per line>
BBED> m /x 11
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
 File: /u01/oracle/oradata/tmp/xifenfei01.dbf (0)
 Block: 12               Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 1106b0d7
 <32 bytes per line>
BBED> sum apply
Check value for File 0, Block 12:
current = 0xe563, required = 0xe563
BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/tmp/xifenfei01.dbf
BLOCK = 12
Block 12 is corrupt
Corrupt block relative dba: 0x0140000c (file 0, block 12)
Fractured block found during verification
Data in bad block:
 type: 6 format: 2 rdba: 0x0140000c
 last change scn: 0x000a.0004d7b0 seq: 0x1 flg: 0x06
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0xd7b00611
 check value in block header: 0xe563
 computed block checksum: 0x0
DBVERIFY - Verification complete
Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 1
Total Blocks Influx           : 2

修改数据库记录

SQL> startup
ORACLE instance started.
Total System Global Area  318767104 bytes
Fixed Size                  1267236 bytes
Variable Size             109054428 bytes
Database Buffers          201326592 bytes
Redo Buffers                7118848 bytes
Database mounted.
Database opened.
SQL> conn chf/xifenfei
Connected.
SQL> update t_xifenfei set object_name='惜分飞';
10 rows updated.
SQL> update t_xifenfei_new set object_name='惜分飞';
10 rows updated.
SQL> commit;
Commit complete.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> conn / as sysdba
Connected.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

利用备份数据文件恢复数据库

[oracle@xifenfei XFF]$ cp xifenfei01.dbf xifenfei01.dbf_bak
[oracle@xifenfei XFF]$ cp ../tmp/xifenfei01.dbf  xifenfei01.dbf
[oracle@xifenfei XFF]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Fri Sep 28 19:13:59 2012
Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area  318767104 bytes
Fixed Size                  1267236 bytes
Variable Size             109054428 bytes
Database Buffers          201326592 bytes
Redo Buffers                7118848 bytes
Database mounted.
ORA-01113: file 5 needs media recovery
ORA-01110: data file 5: '/u01/oracle/oradata/XFF/xifenfei01.dbf'
--提示数据需要恢复
SQL> recover datafile 5;
ORA-00279: change 42949990720 generated at 09/28/2012 19:04:10 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/XFF/archivelog/1_24_792679299.dbf
ORA-00280: change 42949990720 for thread 1 is in sequence #24
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
auto
Log applied.
Media recovery complete.
SQL> alter database open;
Database altered.
--利用被破坏的数据文件+归档日志恢复数据库正常
SQL> col object_name for a30
SQL> select   object_id,object_name from t_xifenfei;
select   object_id,object_name from t_xifenfei
                                    *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 5, block # 12)
ORA-01110: data file 5: '/u01/oracle/oradata/XFF/xifenfei01.dbf'
--提示被破坏的数据块,查询不能完成
--证明坏块之外的数据块还是被正常应用日志
SQL>  select   object_id,object_name from t_xifenfei_new;
 OBJECT_ID OBJECT_NAME
---------- ------------------------------
        20 惜分飞
        44 惜分飞
        28 惜分飞
        15 惜分飞
        29 惜分飞
         3 惜分飞
        25 惜分飞
        39 惜分飞
        51 惜分飞
        26 惜分飞
10 rows selected.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

dbv检查坏块

[oracle@xifenfei XFF]$ dbv file=xifenfei01.dbf
DBVERIFY: Release 10.2.0.4.0 - Production on Fri Sep 28 19:14:52 2012
Copyright (c) 1982, 2007, Oracle.  All rights reserved.
DBVERIFY - Verification starting : FILE = xifenfei01.dbf
DBV-00200: Block, DBA 20971532, already marked corrupt
--这里可以看出来，该数据块已经被标志为坏块
DBVERIFY - Verification complete
Total Pages Examined         : 1280
Total Pages Processed (Data) : 2
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 14
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 1264
Total Pages Marked Corrupt   : 1
Total Pages Influx           : 0
Highest block SCN            : 318700 (10.318700)

查看恢复过程alert日志

Fri Sep 28 19:14:06 2012
Database mounted in Exclusive Mode
Completed: ALTER DATABASE   MOUNT
Fri Sep 28 19:14:06 2012
ALTER DATABASE OPEN
ORA-1113 signalled during: ALTER DATABASE OPEN...
Fri Sep 28 19:14:11 2012
ALTER DATABASE RECOVER  datafile 5
Media Recovery Start
 parallel recovery started with 2 processes
ORA-279 signalled during: ALTER DATABASE RECOVER  datafile 5  ...
Fri Sep 28 19:14:16 2012
ALTER DATABASE RECOVER    CONTINUE DEFAULT
Fri Sep 28 19:14:16 2012
--恢复数据库的时候,发现坏块
Media Recovery Log /u01/oracle/oradata/XFF/archivelog/1_24_792679299.dbf
Fri Sep 28 19:14:16 2012
Hex dump of (file 5, block 12) in trace file /u01/oracle/admin/XFF/bdump/xff_p001_23011.trc
Corrupt block relative dba: 0x0140000c (file 5, block 12)
Fractured block found during media recovery
Data in bad block:
 type: 6 format: 2 rdba: 0x0140000c
 last change scn: 0x000a.0004d7b0 seq: 0x1 flg: 0x06
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0xd7b00611
 check value in block header: 0xe563
 computed block checksum: 0x0
Reread of rdba: 0x0140000c (file 5, block 12) found same corrupted data
--继续恢复
Fri Sep 28 19:14:16 2012
Recovery of Online Redo Log: Thread 1 Group 1 Seq 25 Reading mem 0
  Mem# 0: /u01/oracle/oradata/XFF/redo01.log
Fri Sep 28 19:14:16 2012
Recovery of Online Redo Log: Thread 1 Group 2 Seq 26 Reading mem 0
  Mem# 0: /u01/oracle/oradata/XFF/redo02.log
Fri Sep 28 19:14:16 2012
Recovery of Online Redo Log: Thread 1 Group 3 Seq 27 Reading mem 0
  Mem# 0: /u01/oracle/oradata/XFF/redo03.log
Fri Sep 28 19:14:16 2012
Media Recovery Complete (XFF)
Completed: ALTER DATABASE RECOVER    CONTINUE DEFAULT
Fri Sep 28 19:14:31 2012
alter database open

bbed查看修改相关信息

BBED> set filename '/u01/oracle/oradata/XFF/xifenfei01.dbf'
        FILENAME        /u01/oracle/oradata/XFF/xifenfei01.dbf
BBED> set block 12
        BLOCK#          12
BBED> map
 File: /u01/oracle/oradata/XFF/xifenfei01.dbf (0)
 Block: 12                                    Dba:0x00000000
------------------------------------------------------------
 KTB Data Block (Table/Cluster)
 struct kcbh, 20 bytes                      @0
 struct ktbbh, 96 bytes                     @20
 struct kdbh, 14 bytes                      @124
 struct kdbt[1], 4 bytes                    @138
 sb2 kdbr[10]                               @142
 ub1 freespace[7666]                        @162
 ub1 rowdata[360]                           @7828
 ub4 tailchk                                @8188
BBED> p kcbh
struct kcbh, 20 bytes                       @0
   ub1 type_kcbh                            @0        0x06
   ub1 frmt_kcbh                            @1        0xa2
   ub1 spare1_kcbh                          @2        0x00
   ub1 spare2_kcbh                          @3        0x00
   ub4 rdba_kcbh                            @4        0x0140000c
   ub4 bas_kcbh                             @8        0x00000000
   ub2 wrp_kcbh                             @12       0x0000
   ub1 seq_kcbh                             @14       0xff   <--因为被标记为坏块,所以为ff
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0xe77d
   ub2 spare3_kcbh                          @18       0x0000
--查看数据块中记录
BBED> p *kdbr[5]
rowdata[69]
-----------
ub1 rowdata[69]                             @7897     0x2c
BBED> x /rnc
rowdata[69]                                 @7897
-----------
flag@7897: 0x2c (KDRHFL, KDRHFF, KDRHFH)
lock@7898: 0x02
cols@7899:    2
col    0[2] @7900: 3
col   1[16] @7903: WWW.XIFENFEI.COM  <--确实没有被恢复,而是直接被跳过
BBED> set mode edit
        MODE            Edit
BBED> m /x 01 offset 14
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
 File: /u01/oracle/oradata/XFF/xifenfei01.dbf (0)
 Block: 12               Offsets:   14 to  525           Dba:0x00000000
------------------------------------------------------------------------
 01047de7 00000100 00000dcc 000098d7 …………
 <32 bytes per line>
BBED> d offset 8188
 File: /u01/oracle/oradata/XFF/xifenfei01.dbf (0)
 Block: 12               Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 ff060000    <--这么说明:数据块被标志为坏块的时候，同时会修改tailchk值
 <32 bytes per line>
BBED> m /x 01 offset 8188
 File: /u01/oracle/oradata/XFF/xifenfei01.dbf (0)
 Block: 12               Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 01060000
 <32 bytes per line>
BBED> sum apply
Check value for File 0, Block 12:
current = 0xe77d, required = 0xe77d
--验证块已经标记为正常块
BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/XFF/xifenfei01.dbf
BLOCK = 12
DBVERIFY - Verification complete
Total Blocks Examined         : 1
Total Blocks Processed (Data) : 1
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 0
Total Blocks Influx           : 0

启动数据库测试

SQL> startup
ORACLE instance started.
Total System Global Area  318767104 bytes
Fixed Size                  1267236 bytes
Variable Size             109054428 bytes
Database Buffers          201326592 bytes
Redo Buffers                7118848 bytes
Database mounted.
Database opened.
SQL> conn chf/xifenfei
Connected.
SQL> col object_name for a30
SQL> select   object_id,object_name from t_xifenfei;
 OBJECT_ID OBJECT_NAME
---------- ------------------------------
        20 WWW.XIFENFEI.COM
        44 WWW.XIFENFEI.COM
        28 WWW.XIFENFEI.COM
        15 WWW.XIFENFEI.COM
        29 WWW.XIFENFEI.COM
         3 WWW.XIFENFEI.COM
        25 WWW.XIFENFEI.COM
        39 WWW.XIFENFEI.COM
        51 WWW.XIFENFEI.COM
        26 WWW.XIFENFEI.COM
10 rows selected.
--通过修改数据块的seq_kcbh和tailchk,让这个块恢复正常,但是记录依然丢失，
--因为应用日志恢复之时标记为坏块跳过该块的日志应用

通过实验证明:
1.如果只有数据块异常,应用日志恢复,不一定会出现ORA-600[3020],而是直接把该块标记为坏块,继续应用日志
2.标记坏块其实就是修改seq_kcbh为ff,同时也修改tailchk值
3.经验值:如果在数据库应用日志恢复的时候,如果出现ORA-600[3020]错误,可以使用allow 2 corruption来跳过坏块处理,其实也是修改seq_kcbh为ff,然后让数据库跳过该块的恢复.

large pool太小导致shared server异常

数据库出现如下错误

Fri Oct  5 09:33:54 2012
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20
Process S001 started up but failed with error = 20
failed to start shared server 'S001', oer=20

重启后错误提示变为

Successfully onlined Undo Tablespace 1.
Fri Oct  5 09:34:41 2012
SMON: enabling tx recovery
Fri Oct  5 09:34:41 2012
Database Characterset is AL32UTF8
replication_dependency_tracking turned off (no async multimaster replication found)
Completed: ALTER DATABASE OPEN
Fri Oct  5 13:53:50 2012
Errors in file /oracle/admin/ora/bdump/ora_s000_25948.trc:
ORA-04031: unable to allocate 72 bytes of shared memory
("large pool","unknown object","session heap","trigger condition node")
Fri Oct  5 13:53:50 2012
Errors in file /oracle/admin/ora/bdump/ora_s000_25948.trc:
ORA-00600: internal error code, arguments: [ksudel1], [], [], [], [], [], [], []
ORA-04031: unable to allocate 72 bytes of shared memory
("large pool","unknown object","session heap","trigger condition node")
Fri Oct  5 13:54:52 2012
found dead shared server 'S000', pid = (11, 1)
Fri Oct  5 17:25:59 2012
Errors in file /oracle/admin/ora/bdump/ora_s000_31081.trc:
ORA-04031: unable to allocate 72 bytes of shared memory
("large pool","unknown object","session heap","trigger condition node")
Fri Oct  5 17:25:59 2012
Errors in file /oracle/admin/ora/bdump/ora_s000_31081.trc:
ORA-00600: internal error code, arguments: [ksudel1], [], [], [], [], [], [], []
ORA-04031: unable to allocate 72 bytes of shared memory
("large pool","unknown object","session heap","trigger condition node")

通过这里的错误,我们可以看到是large pool不能分配72 bytes的连续内存空间而使得S000进程报错.那这两者有什么联系:我们知道S000是shared server的进程,那shared server为什么导致large pool不足呢？查询官方文档得出,如下三种情况会使用large pool

Session memory for the shared server and the Oracle XA interface
(used where transactions interact with more than one database)
I/O server processes
Oracle backup and restore operations

主要也就是shared server/parallel query buffers/backup restore这几个操作会使用到large pool.在该案例中很明显的可以看到是因为shared server进程需要分配large pool中一部分空间,而没有连续空间从而出现该错误.数据库相关参数配置

SQL> show parameter mts;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
mts_circuits                         integer     555
mts_dispatchers                      string      (PROTOCOL=TCP) (SERVICE=oraXDB)
mts_listener_address                 string
mts_max_dispatchers                  integer     5
mts_max_servers                      integer     20
mts_multiple_listeners               boolean     FALSE
mts_servers                          integer     1
mts_service                          string      ora
mts_sessions                         integer     550
SQL> show parameter large;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
large_pool_size                      big integer 16777216

这里可以看出来,数据库明显配置了MTS,因为数据库在启动时候,最少会建立一个shared server进程,而这个时候因为large pool太小(16M),导致该进程无法正常建立,从而出现上述alert中相关错误,临时处理方法增加large pool.后续需要关注业务特点,考虑是否可以采用Oracle Dedicated server模式来处理.

logminer相关操作验证

在哪些情况下,数据库不启动附加日志不能正常的被Logminer捕获到的,这里做了一个简单的测试,说明在不启用附加日志的情况下,很多操作不能被捕获,不仅仅是行迁移的数据记录.当然本实验仅供参考,因为在不同的数据库版本,不同的平台,甚至不同的操作都可能出现不同的结果.如果想要数据库日志通过Logminer获得较为完整的sql语句,强烈建议打开附加日志(当然会产生多一点日志,可能增加磁盘io的负担,凡事都有两面性,则其善而从之)
数据库版本

SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Prod
PL/SQL Release 10.2.0.4.0 - Production
CORE    10.2.0.4.0      Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production

插入数据

--为了减少测试redo影响,切换归档日志
SQL> alter system switch logfile;
System altered.
SQL> show user;
USER is "CHF"
--当前scn
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949934814
--当前redo logfile
SQL> select member from v$logfile where group# in(
  2  select group# from v$log where status='CURRENT');
MEMBER
------------------------------------------------------------------
/u01/oracle/oradata/XFF/redo03.log
--创建测试表并插入数据
SQL> create table xifenfei(id number,name varchar2(4000));
Table created.
SQL> insert into xifenfei values(1,'xifenfei');
1 row created.
SQL> insert into xifenfei values(2,'XIFENFEI');
1 row created.
SQL> insert into xifenfei values(3,'XiFenFei');
1 row created.
SQL> commit;
Commit complete.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949934864
--数据存储的datafile 和blocknum
SQL> select id,rowid,dbms_rowid.ROWID_RELATIVE_FNO(rowid) file_num,
  2  dbms_rowid.rowid_block_number(rowid) block_num from xifenfei;
        ID ROWID                FILE_NUM  BLOCK_NUM
---------- ------------------ ---------- ----------
         1 AAAMuvAAJAAAAmkAAA          9       2468
         2 AAAMuvAAJAAAAmkAAB          9       2468
         3 AAAMuvAAJAAAAmkAAC          9       2468
--dump数据块
SQL> alter system dump datafile 9 block 2468;
System altered.
--dump datablock内容
Block header dump:  0x024009a4
 Object id on Block? Y
 seg/obj: 0xcbaf  csc: 0x0a.3ff09  itc: 2  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x24009a1 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0008.019.0000010d  0x00800b85.0111.2f  --U-    3  fsc 0x0000.0003ff0e
0x02   0x0000.000.00000000  0x00000000.0000.00  ----    0  fsc 0x0000.00000000
data_block_dump,data header at 0xcf6c464
===============
tsiz: 0x1f98
hsiz: 0x18
pbl: 0x0cf6c464
bdba: 0x024009a4
     76543210
flag=--------
ntab=1
nrow=3
frre=-1
fsbo=0x18
fseo=0x1f6b
avsp=0x1f53
tosp=0x1f53
0xe:pti[0]      nrow=3  offs=0
0x12:pri[0]     offs=0x1f89
0x14:pri[1]     offs=0x1f7a
0x16:pri[2]     offs=0x1f6b
block_row_dump:
tab 0, row 0, @0x1f89
tl: 15 fb: --H-FL-- lb: 0x1  cc: 2
col  0: [ 2]  c1 02
col  1: [ 8]  78 69 66 65 6e 66 65 69
tab 0, row 1, @0x1f7a
tl: 15 fb: --H-FL-- lb: 0x1  cc: 2
col  0: [ 2]  c1 03
col  1: [ 8]  58 49 46 45 4e 46 45 49
tab 0, row 2, @0x1f6b
tl: 15 fb: --H-FL-- lb: 0x1  cc: 2
col  0: [ 2]  c1 04
col  1: [ 8]  58 69 46 65 6e 46 65 69
--可以清楚的看到这三条记录都存在一个数据块中,并未发生行迁移等情况
--dump redo log
SQL> alter system dump logfile '/u01/oracle/oradata/XFF/redo03.log'
  2    scn min 42949934814 scn max 42949934864;
System altered.
--dump redo logfile内容
CHANGE #9 TYP:0 CLS: 4 AFN:9 DBA:0x024009a3 OBJ:52143 SCN:0x000a.0003ff0e SEQ:  1 OP:13.28
Low HWM
      Highwater::  0x024009a9  ext#: 0      blk#: 8      ext size: 8
  #blocks in seg. hdr's freelists: 0
  #blocks below: 5
  mapblk  0x00000000  offset: 0
lfdba:  0x024009a1 CHANGE #10 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.0003ff0e SEQ:  1 OP:11.2
KTB Redo
op: 0x01  ver: 0x01
op: F  xid:  0x0008.019.0000010d    uba: 0x00800b85.0111.2d
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0) size/delt: 15
fb: --H-FL-- lb: 0x1  cc: 2
null: --
col  0: [ 2]  c1 02
col  1: [ 8]  78 69 66 65 6e 66 65 69
CHANGE #11 TYP:0 CLS:31 AFN:2 DBA:0x00800079 OBJ:4294967295 SCN:0x000a.0003fe8f SEQ:  1 OP:5.2
ktudh redo: slt: 0x0019 sqn: 0x0000010d flg: 0x0012 siz: 108 fbi: 0
            uba: 0x00800b85.0111.2d    pxid:  0x0000.000.00000000
CHANGE #12 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.0003ff0e SEQ:  2 OP:11.2
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800b85.0111.2e
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) size/delt: 15
fb: --H-FL-- lb: 0x1  cc: 2
null: --
col  0: [ 2]  c1 03
col  1: [ 8]  58 49 46 45 4e 46 45 49
CHANGE #13 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.0003ff0e SEQ:  3 OP:11.2
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800b85.0111.2f
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 2(0x2) size/delt: 15
fb: --H-FL-- lb: 0x1  cc: 2
null: --
col  0: [ 2]  c1 04
col  1: [ 8]  58 69 46 65 6e 46 65 69
--这里可以看到，只有redo的信息，没有太多undo信息(因为是插入数据)
--使用Logminer
SQL> conn / as sysdba
Connected.
SQL> exec dbms_logmnr.add_logfile('/u01/oracle/oradata/XFF/redo03.log',dbms_logmnr.new);
PL/SQL procedure successfully completed.
SQL> exec dbms_logmnr.start_Logminer(options=>dbms_logmnr.dict_from_online_catalog);
PL/SQL procedure successfully completed.
SQL> select TABLE_NAME,sql_redo from v$Logminer_contents where SEG_NAME='XIFENFEI';
TABLE_NAME                       SQL_REDO
-------------------------------- -------------------------------------------------------
XIFENFEI                         create table xifenfei(id number,name varchar2(4000));
SQL> EXEC dbms_logmnr.END_Logminer;
PL/SQL procedure successfully completed.
--这里可以明确的看到,Logminer没有找到任何关于这个表的dml操作,也就是说三条insert都没有被找到

说明:在redo中已经包含了insert操作的相关记录,但是因为没有启用附加日志,是的Logminer不能正常获得相关操作语句

简单更新操作

SQL> alter system switch logfile;
System altered.
SQL> conn chf/xifenfei
Connected.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949941538
SQL> select member from v$logfile where group# in(
  2  select group# from v$log
  3  where status='CURRENT');
MEMBER
---------------------------------------------------------------
/u01/oracle/oradata/XFF/redo01.log
SQL> update xifenfei set name='www.xifenfei.com' where id=1;
1 row updated.
SQL> update xifenfei set name='WWW.XIFENFEI.COM' WHERE ID=2;
1 row updated.
SQL> update xifenfei set name='www.orasos.com' where id=3;
1 row updated.
SQL> commit;
Commit complete.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949941552
SQL> alter system dump datafile 9 block 2468;
System altered.
--dump datablock
Block header dump:  0x024009a4
 Object id on Block? Y
 seg/obj: 0xcbaf  csc: 0x0a.4192a  itc: 2  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x24009a1 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0008.019.0000010d  0x00800b85.0111.2f  C---    0  scn 0x000a.0003ff0e
0x02   0x0003.004.0000014e  0x0080002b.01a6.3b  --U-    3  fsc 0x0000.0004192d
data_block_dump,data header at 0xdf83464
===============
tsiz: 0x1f98
hsiz: 0x18
pbl: 0x0df83464
bdba: 0x024009a4
     76543210
flag=--------
ntab=1
nrow=3
frre=-1
fsbo=0x18
fseo=0x1f28
avsp=0x1f3d
tosp=0x1f3d
0xe:pti[0]      nrow=3  offs=0
0x12:pri[0]     offs=0x1f54
0x14:pri[1]     offs=0x1f3d
0x16:pri[2]     offs=0x1f28
block_row_dump:
tab 0, row 0, @0x1f54
tl: 23 fb: --H-FL-- lb: 0x2  cc: 2
col  0: [ 2]  c1 02
col  1: [16]  77 77 77 2e 78 69 66 65 6e 66 65 69 2e 63 6f 6d
tab 0, row 1, @0x1f3d
tl: 23 fb: --H-FL-- lb: 0x2  cc: 2
col  0: [ 2]  c1 03
col  1: [16]  57 57 57 2e 58 49 46 45 4e 46 45 49 2e 43 4f 4d
tab 0, row 2, @0x1f28
tl: 21 fb: --H-FL-- lb: 0x2  cc: 2
col  0: [ 2]  c1 04
col  1: [14]  77 77 77 2e 6f 72 61 73 6f 73 2e 63 6f 6d
SQL> alter system dump logfile '/u01/oracle/oradata/XFF/redo01.log'
  2    scn min 42949941538 scn max 42949941552;
System altered.
--dump redo log
REDO RECORD - Thread:1 RBA: 0x000013.00000002.0010 LEN: 0x0408 VLD: 0x0d
SCN: 0x000a.0004192d SUBSCN:  1 09/26/2012 23:31:27
CHANGE #1 TYP:2 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.0003ff0e SEQ:  5 OP:11.5
KTB Redo
op: 0x11  ver: 0x01
op: F  xid:  0x0003.004.0000014e    uba: 0x0080002b.01a6.39
Block cleanout record, scn:  0x000a.0004192a ver: 0x01 opt: 0x02, entries follow...
  itli: 1  flg: 2  scn: 0x000a.0003ff0e
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0) flag: 0x2c lock: 2 ckix: 251
ncol: 2 nnew: 1 size: 8
col  1: [16]  77 77 77 2e 78 69 66 65 6e 66 65 69 2e 63 6f 6d
CHANGE #2 TYP:0 CLS:21 AFN:2 DBA:0x00800029 OBJ:4294967295 SCN:0x000a.00041781 SEQ:  1 OP:5.2
ktudh redo: slt: 0x0004 sqn: 0x0000014e flg: 0x0012 siz: 136 fbi: 0
            uba: 0x0080002b.01a6.39    pxid:  0x0000.000.00000000
CHANGE #3 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.0004192d SEQ:  1 OP:11.5
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x0080002b.01a6.3a
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) flag: 0x2c lock: 2 ckix: 12
ncol: 2 nnew: 1 size: 8
col  1: [16]  57 57 57 2e 58 49 46 45 4e 46 45 49 2e 43 4f 4d
CHANGE #4 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.0004192d SEQ:  2 OP:11.5
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x0080002b.01a6.3b
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 2(0x2) flag: 0x2c lock: 2 ckix: 12
ncol: 2 nnew: 1 size: 6
col  1: [14]  77 77 77 2e 6f 72 61 73 6f 73 2e 63 6f 6d
--OP:11.5 Update Row Piece
--包含了修改后的值(后镜像)
CHANGE #5 TYP:0 CLS:21 AFN:2 DBA:0x00800029 OBJ:4294967295 SCN:0x000a.0004192d SEQ:  1 OP:5.4
ktucm redo: slt: 0x0004 sqn: 0x0000014e srt: 0 sta: 9 flg: 0x2
ktucf redo: uba: 0x0080002b.01a6.3b ext: 0 spc: 416 fbi: 0
--OP:5.4  Commit transaction (transaction table update)
CHANGE #6 TYP:0 CLS:22 AFN:2 DBA:0x0080002b OBJ:4294967295 SCN:0x000a.00041780 SEQ:  2 OP:5.1
ktudb redo: siz: 136 spc: 750 flg: 0x0012 seq: 0x01a6 rec: 0x39
            xid:  0x0003.004.0000014e
ktubl redo: slt: 4 rci: 0 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
             0x00000000  prev ctl uba: 0x0080002b.01a6.37
prev ctl max cmt scn:  0x000a.00040ff1  prev tx cmt scn:  0x000a.00041076
txn start scn:  0x0000.00000000  logon user: 59  prev brb: 8391493  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x03  ver: 0x01
op: Z
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0) flag: 0x2c lock: 0 ckix: 251
ncol: 2 nnew: 1 size: -8
col  1: [ 8]  78 69 66 65 6e 66 65 69
CHANGE #7 TYP:0 CLS:22 AFN:2 DBA:0x0080002b OBJ:4294967295 SCN:0x000a.0004192d SEQ:  1 OP:5.1
ktudb redo: siz: 96 spc: 612 flg: 0x0022 seq: 0x01a6 rec: 0x3a
            xid:  0x0003.004.0000014e
ktubu redo: slt: 4 rci: 57 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00000000
KDO undo record:
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x0080002b.01a6.39
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) flag: 0x2c lock: 0 ckix: 12
ncol: 2 nnew: 1 size: -8
col  1: [ 8]  58 49 46 45 4e 46 45 49
CHANGE #8 TYP:0 CLS:22 AFN:2 DBA:0x0080002b OBJ:4294967295 SCN:0x000a.0004192d SEQ:  2 OP:5.1
ktudb redo: siz: 96 spc: 514 flg: 0x0022 seq: 0x01a6 rec: 0x3b
            xid:  0x0003.004.0000014e
ktubu redo: slt: 4 rci: 58 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00000000
KDO undo record:
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x0080002b.01a6.3a
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 2(0x2) flag: 0x2c lock: 0 ckix: 12
ncol: 2 nnew: 1 size: -6
col  1: [ 8]  58 69 46 65 6e 46 65 69
--OP:5.1 Undo block or undo segment header
--包含了前镜像(修改前的值,其实就是undo中记录)
--Logminer操作
SQL> conn / as sysdba
Connected.
SQL> exec dbms_logmnr.add_logfile('/u01/oracle/oradata/XFF/redo01.log',dbms_logmnr.new);
PL/SQL procedure successfully completed.
SQL> exec dbms_logmnr.start_Logminer(options=>dbms_logmnr.dict_from_online_catalog);
PL/SQL procedure successfully completed.
SQL> select TABLE_NAME,sql_redo from v$Logminer_contents where SEG_NAME='XIFENFEI';
no rows selected
SQL> EXEC dbms_logmnr.END_Logminer;
PL/SQL procedure successfully completed.
--Logminer无任何记录，证明没有被捕获到

说明:在redo中已经包含了insert操作的相关记录,但是因为没有启用附加日志,是的Logminer不能正常获得相关操作语句

行迁移情况

SQL> alter system switch logfile;
System altered.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949943145
SQL> select member from v$logfile where group# in(
  2  select group# from v$log
  3  where status='CURRENT');
MEMBER
--------------------------------------------------------------------------------
/u01/oracle/oradata/XFF/redo03.log
--制造行迁移
SQL> update xifenfei set name=lpad('F',4000,'F') WHERE ID=1;
1 row updated.
SQL> update xifenfei set name=lpad('X',4000,'X') WHERE ID=2;
1 row updated.
SQL> update xifenfei set name=lpad('C',4000,'C') WHERE ID=3;
1 row updated.
SQL> commit;
Commit complete.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949943162
SQL> select id,rowid,dbms_rowid.ROWID_RELATIVE_FNO(rowid) file_num,
  2  dbms_rowid.rowid_block_number(rowid) block_num from xifenfei;
        ID ROWID                FILE_NUM  BLOCK_NUM
---------- ------------------ ---------- ----------
         1 AAAMuvAAJAAAAmkAAA          9       2468
         2 AAAMuvAAJAAAAmkAAB          9       2468
         3 AAAMuvAAJAAAAmkAAC          9       2468
SQL> alter system dump datafile 9 block 2472;
System altered.
--dump datablock
Block header dump:  0x024009a4
 Object id on Block? Y
 seg/obj: 0xcbaf  csc: 0x0a.41f6e  itc: 2  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x24009a1 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0008.02f.00000113  0x00800085.011b.41  --U-    3  fsc 0x000c.00041f78
0x02   0x0003.004.0000014e  0x0080002b.01a6.3b  C---    0  scn 0x000a.0004192d
data_block_dump,data header at 0xec3f464
===============
tsiz: 0x1f98
hsiz: 0x18
pbl: 0x0ec3f464
bdba: 0x024009a4
     76543210
flag=--------
ntab=1
nrow=3
frre=-1
fsbo=0x18
fseo=0x31
avsp=0x19
tosp=0x25
0xe:pti[0]      nrow=3  offs=0
0x12:pri[0]     offs=0xfef
0x14:pri[1]     offs=0x31
0x16:pri[2]     offs=0xfda
block_row_dump:
tab 0, row 0, @0xfef
tl: 4009 fb: --H-FL-- lb: 0x1  cc: 2
col  0: [ 2]  c1 02
col  1: [4000]
 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46
 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46
…………
tab 0, row 1, @0x31
tl: 4009 fb: --H-FL-- lb: 0x1  cc: 2
col  0: [ 2]  c1 03
col  1: [4000]
 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58
 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58
…………
tab 0, row 2, @0xfda
tl: 9 fb: --H----- lb: 0x1  cc: 0
nrid:  0x024009a8.0    <--发生行迁移，指向下一个迁移数据块
end_of_block_dump
End dump data blocks tsn: 9 file#: 9 minblk 2468 maxblk 2468
--找到下个数据块的block num
SQL> select to_number('9a8','xxxxx') from dual;
TO_NUMBER('9A8','XXXXX')
------------------------
                    2472
SQL> alter system dump datafile 9 block 2472;
System altered.
Block header dump:  0x024009a8
 Object id on Block? Y
 seg/obj: 0xcbaf  csc: 0x0a.3ff09  itc: 3  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x24009a1 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0008.02f.00000113  0x00800085.011b.40  --U-    1  fsc 0x0000.00041f78
0x02   0x0000.000.00000000  0x00000000.0000.00  ----    0  fsc 0x0000.00000000
0x03   0x0000.000.00000000  0x00000000.0000.00  C---    0  scn 0x0000.00000000
data_block_dump,data header at 0xec3f47c
===============
tsiz: 0x1f80
hsiz: 0x14
pbl: 0x0ec3f47c
bdba: 0x024009a8
     76543210
flag=--------
ntab=1
nrow=1
frre=-1
fsbo=0x14
fseo=0xfd1
avsp=0xfbd
tosp=0xfbd
0xe:pti[0]      nrow=1  offs=0
0x12:pri[0]     offs=0xfd1
block_row_dump:
tab 0, row 0, @0xfd1
tl: 4015 fb: ----FL-- lb: 0x1  cc: 2
hrid: 0x024009a4.2   <--迁移对应的起点数据块
col  0: [ 2]  c1 04
col  1: [4000]
 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43
 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43
…………
end_of_block_dump
End dump data blocks tsn: 9 file#: 9 minblk 2472 maxblk 2472
SQL> alter system dump logfile '/u01/oracle/oradata/XFF/redo03.log'
  2    scn min 42949943145 scn max 42949943162;
System altered.
--dump redo log
REDO RECORD - Thread:1 RBA: 0x000015.00000002.0010 LEN: 0x1180 VLD: 0x0d
SCN: 0x000a.00041f6e SUBSCN:  1 09/27/2012 00:36:34
CHANGE #1 TYP:2 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.0004192d SEQ:  4 OP:11.5
KTB Redo
op: 0x11  ver: 0x01
op: F  xid:  0x0008.02f.00000113    uba: 0x00800085.011b.3d
Block cleanout record, scn:  0x000a.00041f6e ver: 0x01 opt: 0x02, entries follow...
  itli: 2  flg: 2  scn: 0x000a.0004192d
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0) flag: 0x2c lock: 1 ckix: 174
ncol: 2 nnew: 1 size: 3986
col  1: [4000]
 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46
 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46
…………
CHANGE #2 TYP:0 CLS:31 AFN:2 DBA:0x00800079 OBJ:4294967295 SCN:0x000a.00041ebd SEQ:  1 OP:5.2
ktudh redo: slt: 0x002f sqn: 0x00000113 flg: 0x0012 siz: 168 fbi: 0
            uba: 0x00800085.011b.3d    pxid:  0x0000.000.00000000
--OP:5.2 Update rollback segment header
CHANGE #3 TYP:0 CLS:32 AFN:2 DBA:0x00800085 OBJ:4294967295 SCN:0x000a.00041ebc SEQ:  1 OP:5.1
ktudb redo: siz: 168 spc: 862 flg: 0x0012 seq: 0x011b rec: 0x3d
            xid:  0x0008.02f.00000113
ktubl redo: slt: 47 rci: 0 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
             0x00000000  prev ctl uba: 0x00800085.011b.3c
prev ctl max cmt scn:  0x000a.000416cd  prev tx cmt scn:  0x000a.000416d0
txn start scn:  0x0000.00000000  logon user: 59  prev brb: 8388734  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x04  ver: 0x01
op: L  itl: xid:  0x0008.019.0000010d uba: 0x00800b85.0111.2f
                      flg: C---    lkc:  0     scn: 0x000a.0003ff0e
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0) flag: 0x2c lock: 0 ckix: 174
ncol: 2 nnew: 1 size: -3986
col  1: [16]  77 77 77 2e 78 69 66 65 6e 66 65 69 2e 63 6f 6d
REDO RECORD - Thread:1 RBA: 0x000015.0000000c.0010 LEN: 0x10d4 VLD: 0x05
SCN: 0x000a.00041f71 SUBSCN:  1 09/27/2012 00:36:40
CHANGE #1 TYP:0 CLS:32 AFN:2 DBA:0x00800085 OBJ:4294967295 SCN:0x000a.00041f6e SEQ:  1 OP:5.1
ktudb redo: siz: 104 spc: 692 flg: 0x0022 seq: 0x011b rec: 0x3e
            xid:  0x0008.02f.00000113
ktubu redo: slt: 47 rci: 61 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00000000
KDO undo record:
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800085.011b.3d
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) flag: 0x2c lock: 0 ckix: 12
ncol: 2 nnew: 1 size: -3986
col  1: [16]  57 57 57 2e 58 49 46 45 4e 46 45 49 2e 43 4f 4d
CHANGE #2 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.00041f6e SEQ:  1 OP:11.5
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800085.011b.3e
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) flag: 0x2c lock: 1 ckix: 12
ncol: 2 nnew: 1 size: 3986
col  1: [4000]
 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58
 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58
…………
REDO RECORD - Thread:1 RBA: 0x000015.00000015.010c LEN: 0x1098 VLD: 0x01
SCN: 0x000a.00041f74 SUBSCN:  2 09/27/2012 00:36:46
CHANGE #1 TYP:0 CLS:32 AFN:2 DBA:0x00800085 OBJ:4294967295 SCN:0x000a.00041f74 SEQ:  1 OP:5.1
ktudb redo: siz: 60 spc: 516 flg: 0x0022 seq: 0x011b rec: 0x40
            xid:  0x0008.02f.00000113
ktubu redo: slt: 47 rci: 63 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00000000
KDO undo record:
KTB Redo
op: 0x03  ver: 0x01
op: Z
KDO Op code: DRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a8  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0)
CHANGE #2 TYP:0 CLS: 1 AFN:9 DBA:0x024009a8 OBJ:52143 SCN:0x000a.0003ff0e SEQ:  1 OP:11.2
KTB Redo
op: 0x01  ver: 0x01
op: F  xid:  0x0008.02f.00000113    uba: 0x00800085.011b.40
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a8  hdba: 0x024009a3
itli: 1  ispac: 24  maxfr: 4858
tabn: 0 slot: 0(0x0) size/delt: 4015
fb: ----FL-- lb: 0x1  cc: 2   <--这里没有H表明是发生了行迁移过来的记录(对应的flag可以转化为0x0c)
hrid: 0x024009a4.2
null: --
col  0: [ 2]  c1 04
col  1: [4000]
 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43
 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43
…………
REDO RECORD - Thread:1 RBA: 0x000015.0000001e.0078 LEN: 0x0124 VLD: 0x01
SCN: 0x000a.00041f74 SUBSCN:  3 09/27/2012 00:36:46
CHANGE #1 TYP:0 CLS:32 AFN:2 DBA:0x00800085 OBJ:4294967295 SCN:0x000a.00041f74 SEQ:  2 OP:5.1
ktudb redo: siz: 124 spc: 454 flg: 0x0022 seq: 0x011b rec: 0x41
            xid:  0x0008.02f.00000113
ktubu redo: slt: 47 rci: 64 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00000000
KDO undo record:
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800085.011b.3f
KDO Op code: ORP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 2(0x2) size/delt: 21
fb: --H-FL-- lb: 0x1  cc: 2
null: --
col  0: [ 2]  c1 04
col  1: [14]  77 77 77 2e 6f 72 61 73 6f 73 2e 63 6f 6d
CHANGE #2 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.00041f74 SEQ:  1 OP:11.6
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800085.011b.41
KDO Op code: ORP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 2(0x2) size/delt: 9
fb: --H----- lb: 0x1  cc: 0  <--这里可以看到对应的块只有header信息无L,也就是发生了行迁移
nrid:  0x024009a8.0   <--通block dump说明
null:
--OP:11.6 Overwrite Row Piece
--Logminer操作
SQL> conn / as sysdba
Connected.
SQL> exec dbms_logmnr.add_logfile('/u01/oracle/oradata/XFF/redo03.log',dbms_logmnr.new);
PL/SQL procedure successfully completed.
SQL> exec dbms_logmnr.start_Logminer(options=>dbms_logmnr.dict_from_online_catalog);
PL/SQL procedure successfully completed.
SQL> EXEC dbms_logmnr.END_Logminer;
PL/SQL procedure successfully completed.
SQL> col sql_redo for a80
SQL> col TABLE_NAME for a15
SQL> set lines 134
SQL> select TABLE_NAME,sql_redo from v$Logminer_contents where scn>=42949943145 and scn<=42949943162;
TABLE_NAME      SQL_REDO
--------------- --------------------------------------------------------------------------------
XIFENFEI        update "CHF"."XIFENFEI" set "NAME" = 'XXXX……XXXXX' where "NAME" = 'WWW.XIFENFEI.COM'
                and ROWID = 'AAAMuvAAJAAAAmkAAB';
XIFENFEI        Unsupported
XIFENFEI        Unsupported
XIFENFEI        update "CHF"."XIFENFEI" set "ID" = NULL, "NAME" = NULL where "ID" = '3' and "NAM
                E" = 'www.orasos.com' and ROWID = 'AAAMuvAAJAAAAmkAAC';
                commit;
7 rows selected.
SQL> EXEC dbms_logmnr.END_Logminer;
PL/SQL procedure successfully completed.
--获得了第二条记录(第一条没有任何记录,第三条因为行迁移,所以出现了update更新相关列为null,从而没有被Logminer正在的捕获)

说明：1)在发生行迁移之时,Logminer不能获得正常的sql语句,而是直接提示Unsupported;2)不发生行迁移也不一定能够获得update语句

删除操作

SQL> conn chf/xifenfei
Connected.
SQL> alter system switch logfile;
System altered.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949953508
SQL> select member from v$logfile where group# in(
  2  select group# from v$log
  3  where status='CURRENT');
MEMBER
--------------------------------------------------------------------------------
/u01/oracle/oradata/XFF/redo01.log
SQL> delete from xifenfei where id=1;
1 row deleted.
SQL> delete from xifenfei where id=2;
1 row deleted.
SQL> delete from xifenfei where id=3;
1 row deleted.
SQL> commit;
Commit complete.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949953524
--原始数据所在block
SQL> alter system dump datafile 9 block 2468;
System altered.
--发生行迁移的block
SQL> alter system dump datafile 9 block 2472;
System altered.
--dump block 内容
Block header dump:  0x024009a4
 Object id on Block? Y
 seg/obj: 0xcbaf  csc: 0x0a.447e9  itc: 2  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x24009a1 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0008.02f.00000113  0x00800085.011b.41  C---    0  scn 0x000a.00041f78
0x02   0x0004.014.000000da  0x00800398.00bf.02  --U-    3  fsc 0x1f55.000447f2
data_block_dump,data header at 0xdcb9464
===============
tsiz: 0x1f98
hsiz: 0x18
pbl: 0x0dcb9464
bdba: 0x024009a4
     76543210
flag=--------
ntab=1
nrow=3
frre=-1
fsbo=0x18
fseo=0x31
avsp=0x25
tosp=0x1f80
0xe:pti[0]      nrow=3  offs=0
0x12:pri[0]     offs=0xfef
0x14:pri[1]     offs=0x31
0x16:pri[2]     offs=0xfda
block_row_dump:
tab 0, row 0, @0xfef
tl: 2 fb: --HDFL-- lb: 0x2
tab 0, row 1, @0x31
tl: 2 fb: --HDFL-- lb: 0x2
tab 0, row 2, @0xfda
tl: 2 fb: --HD---- lb: 0x2
Block header dump:  0x024009a8
 Object id on Block? Y
 seg/obj: 0xcbaf  csc: 0x0a.447ef  itc: 3  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x24009a1 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0008.02f.00000113  0x00800085.011b.40  C---    0  scn 0x000a.00041f78
0x02   0x0004.014.000000da  0x00800399.00bf.01  --U-    1  fsc 0x0fad.000447f2
0x03   0x0000.000.00000000  0x00000000.0000.00  C---    0  scn 0x0000.00000000
data_block_dump,data header at 0xdcb947c
===============
tsiz: 0x1f80
hsiz: 0x14
pbl: 0x0dcb947c
bdba: 0x024009a8
     76543210
flag=--------
ntab=1
nrow=1
frre=-1
fsbo=0x14
fseo=0xfd1
avsp=0xfbd
tosp=0x1f6c
0xe:pti[0]      nrow=1  offs=0
0x12:pri[0]     offs=0xfd1
block_row_dump:
tab 0, row 0, @0xfd1
tl: 2 fb: ---DFL-- lb: 0x2
end_of_block_dump
--通过数据块dump证明，记录确实已经被删除
--dump redo logfile
SQL> alter system dump logfile '/u01/oracle/oradata/XFF/redo01.log'
  2    scn min 42949953508 scn max 42949953524;
System altered.
--dump redolog
REDO RECORD - Thread:1 RBA: 0x000016.0000000b.0010 LEN: 0x1170 VLD: 0x0d
SCN: 0x000a.000447e9 SUBSCN:  1 09/27/2012 20:03:36
CHANGE #1 TYP:2 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.00041f78 SEQ:  1 OP:11.3
KTB Redo
op: 0x11  ver: 0x01
op: F  xid:  0x0004.014.000000da    uba: 0x00800397.00bf.06
Block cleanout record, scn:  0x000a.000447e9 ver: 0x01 opt: 0x02, entries follow...
  itli: 1  flg: 2  scn: 0x000a.00041f78
KDO Op code: DRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0)
--OP:11.3 Drop Row Piece
CHANGE #2 TYP:0 CLS:23 AFN:2 DBA:0x00800039 OBJ:4294967295 SCN:0x000a.000447ae SEQ:  1 OP:5.2
ktudh redo: slt: 0x0014 sqn: 0x000000da flg: 0x0012 siz: 4172 fbi: 0
            uba: 0x00800397.00bf.06    pxid:  0x0000.000.00000000
CHANGE #3 TYP:0 CLS:24 AFN:2 DBA:0x00800397 OBJ:4294967295 SCN:0x000a.000447ad SEQ:  1 OP:5.1
ktudb redo: siz: 4172 spc: 5804 flg: 0x0012 seq: 0x00bf rec: 0x06
            xid:  0x0004.014.000000da
ktubl redo: slt: 20 rci: 0 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
             0x00000000  prev ctl uba: 0x00800397.00bf.05
prev ctl max cmt scn:  0x000a.00043852  prev tx cmt scn:  0x000a.00043862
txn start scn:  0x0000.00000000  logon user: 59  prev brb: 8389522  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x04  ver: 0x01
op: L  itl: xid:  0x0003.004.0000014e uba: 0x0080002b.01a6.3b
                      flg: C---    lkc:  0     scn: 0x000a.0004192d
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0) size/delt: 4009
fb: --H-FL-- lb: 0x0  cc: 2
null: --
col  0: [ 2]  c1 02
col  1: [4000]
 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46
 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46
…………
REDO RECORD - Thread:1 RBA: 0x000016.00000014.0010 LEN: 0x0044 VLD: 0x01
SCN: 0x000a.000447e9 SUBSCN:  1 09/27/2012 20:03:36
CHANGE #1 TYP:0 CLS: 8 AFN:9 DBA:0x024009a1 OBJ:52143 SCN:0x000a.00041f74 SEQ:  1 OP:13.22
Redo on Level1 Bitmap Block
Redo for state change
Len: 1 Offset: 3 newstate: 3
REDO RECORD - Thread:1 RBA: 0x000016.00000015.0010 LEN: 0x1100 VLD: 0x05
SCN: 0x000a.000447ed SUBSCN:  1 09/27/2012 20:03:42
CHANGE #1 TYP:0 CLS:23 AFN:2 DBA:0x00800039 OBJ:4294967295 SCN:0x000a.000447e9 SEQ:  1 OP:5.2
ktudh redo: slt: 0x0014 sqn: 0x00000000 flg: 0x000a siz: 4108 fbi: 80
            uba: 0x00800398.00bf.01    pxid:  0x0000.000.00000000
CHANGE #2 TYP:1 CLS:24 AFN:2 DBA:0x00800398 OBJ:4294967295 SCN:0x000a.000447ec SEQ:  1 OP:5.1
ktudb redo: siz: 4108 spc: 1630 flg: 0x000a seq: 0x00bf rec: 0x01
            xid:  0x0004.014.000000da
ktubu redo: slt: 20 rci: 0 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00800397
KDO undo record:
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800397.00bf.06
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) size/delt: 4009
fb: --H-FL-- lb: 0x0  cc: 2
null: --
col  0: [ 2]  c1 03
col  1: [4000]
 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58
 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58
…………
CHANGE #3 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.000447e9 SEQ:  1 OP:11.3
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800398.00bf.01
KDO Op code: DRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1)
REDO RECORD - Thread:1 RBA: 0x000016.0000001d.0190 LEN: 0x0044 VLD: 0x01
SCN: 0x000a.000447ed SUBSCN:  1 09/27/2012 20:03:42
CHANGE #1 TYP:0 CLS: 8 AFN:9 DBA:0x024009a1 OBJ:52143 SCN:0x000a.000447e9 SEQ:  1 OP:13.22
Redo on Level1 Bitmap Block
Redo for state change
Len: 1 Offset: 3 newstate: 5
REDO RECORD - Thread:1 RBA: 0x000016.0000001e.0010 LEN: 0x0118 VLD: 0x05
SCN: 0x000a.000447ee SUBSCN:  1 09/27/2012 20:03:45
CHANGE #1 TYP:0 CLS:24 AFN:2 DBA:0x00800398 OBJ:4294967295 SCN:0x000a.000447ed SEQ:  1 OP:5.1
ktudb redo: siz: 96 spc: 4040 flg: 0x0022 seq: 0x00bf rec: 0x02
            xid:  0x0004.014.000000da
ktubu redo: slt: 20 rci: 1 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00000000
KDO undo record:
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800398.00bf.01
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 2(0x2) size/delt: 9
fb: --H----- lb: 0x0  cc: 0
nrid:  0x024009a8.0
null:
CHANGE #2 TYP:0 CLS: 1 AFN:9 DBA:0x024009a4 OBJ:52143 SCN:0x000a.000447ed SEQ:  1 OP:11.3
KTB Redo
op: 0x02  ver: 0x01
op: C  uba: 0x00800398.00bf.02
KDO Op code: DRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a4  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 2(0x2)
REDO RECORD - Thread:1 RBA: 0x000016.0000001e.0128 LEN: 0x10fc VLD: 0x01
SCN: 0x000a.000447f0 SUBSCN:  1 09/27/2012 20:03:45
CHANGE #1 TYP:0 CLS:23 AFN:2 DBA:0x00800039 OBJ:4294967295 SCN:0x000a.000447ed SEQ:  1 OP:5.2
ktudh redo: slt: 0x0014 sqn: 0x00000000 flg: 0x000a siz: 4100 fbi: 84
            uba: 0x00800399.00bf.01    pxid:  0x0000.000.00000000
CHANGE #2 TYP:1 CLS:24 AFN:2 DBA:0x00800399 OBJ:4294967295 SCN:0x000a.000447ef SEQ:  1 OP:5.1
ktudb redo: siz: 4100 spc: 3942 flg: 0x000a seq: 0x00bf rec: 0x01
            xid:  0x0004.014.000000da
ktubu redo: slt: 20 rci: 0 opc: 11.1 objn: 52143 objd: 52143 tsn: 9
Undo type:  Regular undo       Undo type:  Last buffer split:  No
Tablespace Undo:  No
             0x00800398
KDO undo record:
KTB Redo
op: 0x03  ver: 0x01
op: Z
KDO Op code: IRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a8  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0) size/delt: 4015
fb: ----FL-- lb: 0x0  cc: 2
hrid: 0x024009a4.2
null: --
col  0: [ 2]  c1 04
col  1: [4000]
 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43
 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43
…………
CHANGE #3 TYP:2 CLS: 1 AFN:9 DBA:0x024009a8 OBJ:52143 SCN:0x000a.00041f78 SEQ:  1 OP:11.3
KTB Redo
op: 0x11  ver: 0x01
op: F  xid:  0x0004.014.000000da    uba: 0x00800399.00bf.01
Block cleanout record, scn:  0x000a.000447ef ver: 0x01 opt: 0x02, entries follow...
  itli: 1  flg: 2  scn: 0x000a.00041f78
KDO Op code: DRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x024009a8  hdba: 0x024009a3
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 0(0x0)
REDO RECORD - Thread:1 RBA: 0x000016.00000027.00b4 LEN: 0x0044 VLD: 0x01
SCN: 0x000a.000447f0 SUBSCN:  1 09/27/2012 20:03:45
CHANGE #1 TYP:0 CLS: 8 AFN:9 DBA:0x024009a1 OBJ:52143 SCN:0x000a.000447ed SEQ:  1 OP:13.22
Redo on Level1 Bitmap Block
Redo for state change
Len: 1 Offset: 7 newstate: 5
--可以看到redo部分没有太多记录,而undo部分的信息比较全(因为是delete操作)
--Logminer操作
SQL> conn / as sysdba
Connected.
SQL> exec dbms_logmnr.add_logfile('/u01/oracle/oradata/XFF/redo01.log',dbms_logmnr.new);
PL/SQL procedure successfully completed.
SQL> exec dbms_logmnr.start_Logminer(options=>dbms_logmnr.dict_from_online_catalog);
PL/SQL procedure successfully completed.
SQL> select sql_redo from v$Logminer_contents where SEG_NAME='XIFENFEI';
SQL_REDO
--------------------------------------------------------------------------------
delete from "CHF"."XIFENFEI" where "ID" = '2' and "NAME" = 'XXXXXXXXXXXXXXXXXXXX
…………
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX' and ROWID = 'AAAMu
vAAJAAAAmkAAB';
Unsupported
Unsupported
SQL> EXEC dbms_logmnr.END_Logminer;
PL/SQL procedure successfully completed.
--也只是捕获了第二条记录,第一条无任何信息,第三条因为行迁移所以提示Unsupported

说明:我们可以看到对于delete操作,有部分不能被Logminer正常捕获,行迁移的直接提示Unsupported

启用数据库附加日志

SQL> conn chf/xifenfei
Connected.
SQL> drop table xifenfei purge;
Table dropped.
SQL> alter database add supplemental log data;
Database altered.
SQL> alter system switch logfile;
System altered.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949959788
SQL> select member from v$logfile where group# in(
  2  select group# from v$log where status='CURRENT');
MEMBER
--------------------------------------------------------------------------------
/u01/oracle/oradata/XFF/redo02.log
SQL> create table xifenfei(id number,name varchar2(4000));
Table created.
SQL> insert into xifenfei values(1,'xifenfei');
1 row created.
SQL> insert into xifenfei values(2,'XIFENFEI');
1 row created.
SQL> insert into xifenfei values(3,'XiFenFei');
1 row created.
SQL> commit;
Commit complete.
SQL> update xifenfei set name='www.xifenfei.com' where id=1;
1 row updated.
SQL> update xifenfei set name='WWW.XIFENFEI.COM' WHERE ID=2;
1 row updated.
SQL> update xifenfei set name='www.orasos.com' where id=3;
1 row updated.
SQL> commit;
Commit complete.
SQL> update xifenfei set name=lpad('F',4000,'F') WHERE ID=1;
1 row updated.
SQL> update xifenfei set name=lpad('X',4000,'X') WHERE ID=2;
1 row updated.
SQL> update xifenfei set name=lpad('C',4000,'C') WHERE ID=3;
1 row updated.
SQL> commit;
Commit complete.
SQL> delete from xifenfei where id=1;
1 row deleted.
SQL> delete from xifenfei where id=2;
1 row deleted.
SQL> delete from xifenfei where id=3;
1 row deleted.
SQL> commit;
Commit complete.
SQL> select to_char(dbms_flashback.get_system_change_number,'9999999999999') scn from dual;
SCN
--------------
   42949959845
SQL> conn / as sysdba
Connected.
SQL> exec dbms_logmnr.add_logfile('/u01/oracle/oradata/XFF/redo02.log',dbms_logmnr.new);
PL/SQL procedure successfully completed.
SQL> exec dbms_logmnr.start_Logminer(options=>dbms_logmnr.dict_from_online_catalog);
PL/SQL procedure successfully completed.
SQL> select sql_redo from v$Logminer_contents where SEG_NAME='XIFENFEI';
SQL_REDO
--------------------------------------------------------------------------------
create table xifenfei(id number,name varchar2(4000));
insert into "CHF"."XIFENFEI"("ID","NAME") values ('1','xifenfei');
insert into "CHF"."XIFENFEI"("ID","NAME") values ('2','XIFENFEI');
insert into "CHF"."XIFENFEI"("ID","NAME") values ('3','XiFenFei');
update "CHF"."XIFENFEI" set "NAME" = 'www.xifenfei.com' where "NAME" = 'xifenfei
' and ROWID = 'AAAMwEAAJAAAAmkAAA';
update "CHF"."XIFENFEI" set "NAME" = 'WWW.XIFENFEI.COM' where "NAME" = 'XIFENFEI
' and ROWID = 'AAAMwEAAJAAAAmkAAB';
update "CHF"."XIFENFEI" set "NAME" = 'www.orasos.com' where "NAME" = 'XiFenFei'
and ROWID = 'AAAMwEAAJAAAAmkAAC';
update "CHF"."XIFENFEI" set "NAME" = 'FFFFFFF…………FFFF' where
"NAME" = 'www.xifenfei.com' and ROWID = 'AAAMwEAAJAAAAmkAAA';
update "CHF"."XIFENFEI" set "NAME" = 'XXXXXXXXX…………XX' where
"NAME" = 'WWW.XIFENFEI.COM' and ROWID = 'AAAMwEAAJAAAAmkAAB';
update "CHF"."XIFENFEI" set "ID" = '3', "NAME" = 'CCCCC…………CCCCCCCCC'
where "ID" = '3' and "NAME"= 'www.orasos.com' and ROWID = 'AAAMwEAAJAAAAmkAAC';
delete from "CHF"."XIFENFEI" where "ID" = '1' and "NAME" = 'FFFFFF…………FF'
and ROWID = 'AAAMwEAAJAAAAmkAAA';
delete from "CHF"."XIFENFEI" where "ID" = '2' and "NAME" = 'XX…………XXX'
and ROWID = 'AAAMwEAAJAAAAmkAAB';
delete from "CHF"."XIFENFEI" where "ID" = '3' and "NAME" = 'CCCCCCCC…………CCC'
and ROWID = 'AAAMwEAAJAAAAmkAAC';
19 rows selected.

测试证明,启动附加日志后,数据库的相关操作都能够捕获,包括行迁移

使用plsql抢救数据

“在oracle出现ORA-8103/ORA-1578/ORA-376″等情况下抢救数据的争论没有停止过,很多人想到的是使用bbed,dul等工具来抢救,其实在很多时候我们使用pl/sql也可以完美的抢救数据.在这里我们通过模拟ORA-8103错误，然后使用plsql来找回数据.这中处理方法相对于bbed风险小,但是缺点是如果数据量大处理时间可能比较长,可能比dul有的一比,但是dul的工具不是任何人都有的.所以整体来说,在大部分情况下,这种方法处理某个数据块错误,抢救某个对象数据,还是很好的方法.
1.有非空列index情况

--创建测试表
SQL> create table xifenfei
  2  as
  3  select * from dba_objects;
Table created.
--修改某个项为非空值
SQL> alter table xifenfei modify object_id not null;
Table altered.
--创建一个唯一index
SQL> create unique index ind_xifenfei  on xifenfei(object_id);
Index created.
--表总记录
SQL> select count(*) from xifenfei;
  COUNT(*)
----------
     50088
--extent的分布情况
SQL> set pages 100
SQL>  select file_id,block_id,block_id+blocks-1
  2    from dba_extents
  3   where segment_name ='XIFENFEI' AND owner='CHF';
   FILE_ID   BLOCK_ID BLOCK_ID+BLOCKS-1
---------- ---------- -----------------
         9       1545              1552
         9       1553              1560
         9       1561              1568
         9       1569              1576
         9       1577              1584
         9       1585              1592
         9       1593              1600
         9       1601              1608
         9       1609              1616
         9       1617              1624
         9       1625              1632
         9       1633              1640
         9       1641              1648
         9       1649              1656
         9       1657              1664
         9       1665              1672
         9       1673              1800
         9       1801              1928
         9       1929              2056
         9       2057              2184
         9       2185              2312
21 rows selected.
--2200数据块包含记录
SQL> select   count(*)
  2  from chf.xifenfei where dbms_rowid.rowid_block_number(rowid)=2200;
  COUNT(*)
----------
        69
--关闭数据库
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
--破坏数据块
[oracle@xifenfei ~]$ dd if=/dev/zero of=/u01/oracle/oradata/XFF/users03.dbf  bs=8192  count=1 seek=2200 conv=notrunc
1+0 records in
1+0 records out
8192 bytes (8.2 kB) copied, 0.000151554 seconds, 54.1 MB/s
--启动数据库
SQL> startup
ORACLE instance started.
Total System Global Area  318767104 bytes
Fixed Size                  1267236 bytes
Variable Size             104860124 bytes
Database Buffers          205520896 bytes
Redo Buffers                7118848 bytes
Database mounted.
Database opened.
--查询结果
SQL>  select /*+ full(xifenfei) */ count(*) from chf.xifenfei;
 select /*+ full(xifenfei) */ count(*) from chf.xifenfei
                                                *
ERROR at line 1:
ORA-08103: object no longer exists
SQL> create table chf.xifenfei_new
  2  as
  3  select * from chf.xifenfei;
select * from chf.xifenfei
                  *
ERROR at line 3:
ORA-08103: object no longer exists
--创建备份表
SQL> create table chf.xifenfei_new
  2  as
  3  select * from chf.xifenfei where 1=0;
Table created.
--创建坏块相关rowid记录表
SQL> create table chf.bad_rows (row_id rowid, oracle_error_code number);
Table created.
--执行plsql脚本
DECLARE
 TYPE RowIDTab IS TABLE OF ROWID INDEX BY BINARY_INTEGER;
 CURSOR c1 IS  select /*+ index(xifenfei ind_xifenfei) */ rowid
 from chf.xifenfei
 where object_id is NOT NULL;
 r RowIDTab;
 rows  NATURAL := 20000;
 bad_rows number := 0 ;
 errors number;
 error_code number;
 myrowid rowid;
BEGIN
 OPEN c1;
 LOOP
   FETCH  c1 BULK COLLECT INTO r LIMIT rows;
   EXIT WHEN r.count=0;
   BEGIN
    FORALL i IN r.FIRST..r.LAST SAVE EXCEPTIONS
     insert into chf.xifenfei_new
     select /*+ ROWID(A) */ *
     from chf.xifenfei A where rowid = r(i);
   EXCEPTION
   when OTHERS then
    BEGIN
     errors := SQL%BULK_EXCEPTIONS.COUNT;
     FOR err1 IN 1..errors LOOP
       error_code := SQL%BULK_EXCEPTIONS(err1).ERROR_CODE;
       if error_code in (1410, 8103) then
         myrowid := r(SQL%BULK_EXCEPTIONS(err1).ERROR_INDEX);
         bad_rows := bad_rows + 1;
         insert into chf.bad_rows values(myrowid, error_code);
       else
         raise;
       end if;
     END LOOP;
     END;
   END;
  commit;
 END LOOP;
 commit;
 CLOSE c1;
 dbms_output.put_line('Total Bad Rows: '||bad_rows);
END;
/
--查询错误记录
SQL> select count(*) from chf.bad_rows ;
  COUNT(*)
----------
        69
SQL> select * from chf.bad_rows where rownum<10;
ROW_ID             ORACLE_ERROR_CODE
------------------ -----------------
AAAMugAAJAAAAiYAAA              8103
AAAMugAAJAAAAiYAAB              8103
AAAMugAAJAAAAiYAAC              8103
AAAMugAAJAAAAiYAAD              8103
AAAMugAAJAAAAiYAAE              8103
AAAMugAAJAAAAiYAAF              8103
AAAMugAAJAAAAiYAAG              8103
AAAMugAAJAAAAiYAAH              8103
AAAMugAAJAAAAiYAAI              8103
9 rows selected.
--查询备份表记录
SQL> select count(*) from chf.xifenfei_new;
  COUNT(*)
----------
     50019
50088-50019=69和被破坏块中记录一致,证明所有好块中记录全部被找回来

2.无非空列index情况

--创建表
SQL> CONN CHF/XIFENFEI
Connected.
SQL> create table t_xifenfei
  2  as
  3  select * from dba_objects;
Table created.
--表中记录总数
SQL> select count(*) from t_xifenfei;
  COUNT(*)
----------
     50086
--extent分布
SQL> SET PAGES 100
SQL>  select file_id,block_id,block_id+blocks-1
  2    from dba_extents
  3   where segment_name ='T_XIFENFEI' AND owner='CHF';
   FILE_ID   BLOCK_ID BLOCK_ID+BLOCKS-1
---------- ---------- -----------------
         9          9                16
         9         17                24
         9         25                32
         9         33                40
         9         41                48
         9         49                56
         9         57                64
         9         65                72
         9         73                80
         9         81                88
         9         89                96
         9         97               104
         9        105               112
         9        113               120
         9        121               128
         9        129               136
         9        137               264
         9        265               392
         9        393               520
         9        521               648
         9        649               776
21 rows selected.
--700数据块中记录数
SQL> select   count(*)
  2  from chf.t_xifenfei where dbms_rowid.rowid_block_number(rowid)=700;
  COUNT(*)
----------
        73
--关闭数据库
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
--破坏block 700的数据块
[oracle@xifenfei ~]$ dd if=/dev/zero of=/u01/oracle/oradata/XFF/users03.dbf  bs=8192  count=1 seek=700 conv=notrunc
1+0 records in
1+0 records out
8192 bytes (8.2 kB) copied, 0.000156576 seconds, 52.3 MB/s
--启动数据库
SQL> startup
ORACLE instance started.
Total System Global Area  318767104 bytes
Fixed Size                  1267236 bytes
Variable Size             104860124 bytes
Database Buffers          205520896 bytes
Redo Buffers                7118848 bytes
Database mounted.
Database opened.
--查询报错
SQL> select count(*) from chf.t_xifenfei;
select count(*) from chf.t_xifenfei
                         *
ERROR at line 1:
ORA-08103: object no longer exists
--创建备份表
SQL> CREATE TABLE T_XIFENFEI_NEW
  2  AS
  3  SELECT * FROM T_XIFENFEI WHERE 1=0;
--找回记录
set serveroutput on
set concat off
DECLARE
 nrows number;
 rid rowid;
 dobj number;
 ROWSPERBLOCK number;
BEGIN
 ROWSPERBLOCK:=1000;  --估算最大的一个块中记录条数
 nrows:=0;
 select data_object_id  into dobj
 from dba_objects
 where owner = 'CHF'
 and object_name = 'T_XIFENFEI'
-- and subobject_name = '<table partition>'  Add this condition if table is partitioned
 ;
 for i in (select relative_fno, block_id, block_id+blocks-1 totblocks
           from dba_extents
           where owner = 'CHF'
             and segment_name = 'T_XIFENFEI'
-- and partition_name = '<table partition>' Add this condition if table is partitioned
-- and file_id != <OFFLINED DATAFILE> This condition is only used if a datafile needs to be skipped due to ORA-376 (A)
          order by extent_id)
 loop
   for br in i.block_id..i.totblocks loop
    for j in 1..ROWSPERBLOCK loop
    begin
      rid := dbms_rowid.ROWID_CREATE(1,dobj,i.relative_fno, br , j-1);
      insert into CHF.T_XIFENFEI_NEW
      select /*+ ROWID(A) */ *
      from CHF.T_XIFENFEI A
      where rowid = rid;
      if sql%rowcount = 1 then nrows:=nrows+1; end if;
      if (mod(nrows,10000)=0) then commit; end if;
    exception when others then null;
    end;
    end loop;
  end loop;
 end loop;
 COMMIT;
 dbms_output.put_line('Total rows: '||to_char(nrows));
END;
/
--找回记录数
SQL> SELECT COUNT(*) FROM CHF.T_XIFENFEI_NEW;
  COUNT(*)
----------
     50013
50086-50013=73  证明非坏块中的数据都被完全寻找回来

参考：
ORA-8103 Troubleshooting, Diagnostic and Solution [ID 268302.1]
Extract rows from a CORRUPT table creating ROWID from DBA_EXTENTS [ID 422547.1]

《前世今生的轮回》—歌词改写—《专一爱》

转载朋友改写《前世今生的轮回》为《专一爱》的歌词
前世今生的轮回
=================================
第1章：相遇
——————————————
挥手之间，我就爱上了你
把这份爱牢牢的，放在心里
海誓山盟，的爱，也给了你
把你的样子留在了，脑海里
时间飞逝，爱的那么甜蜜
鱼和猫眯，从此也不再对立
感动上天，与你相偎相依
今生的相遇，不，会，轻，言，分离

第2章：相识
——————————————
前世的轮回，注定了爱你
奈何桥上等着你
梦婆的汤里，留下了回忆
下辈子你能否记的起
心中的秘密，注定是天意
就像牛郎和织女
好好的爱你，乞求天的旨意
我们这辈子要在一起

第3章：相谈
——————————————
一世的情缘，我拥有了你，
把这份甜蜜好好的，去珍，惜
沧海桑田，的爱带给了你，
把你的纯洁，留给了你自己
时间飞逝，爱的那么彻底
老鼠大米推了世俗，在，一起
感动上天，与你经历风雨
今生的相遇，不会，随便，放弃

第4章：相思
——————————————
爱你在心里，没人能代替
把你拥在我怀里
感受你的气息，体会你的爱意
真的真的不能没有你
想你在梦里，念你在心底
失去你，我不愿意
把你的甜蜜，抓在我的手里
会用一生好好的陪你

第5章：相知
——————————————
挥手之间，我们在了一起
彼此的分离有了，心的相聚
罗曼蒂克，式的爱情洗礼
把我们心真正，牵随，在一起
时间飞逝，爱的那么清晰
蜜蜂与蜂蜜，永远不会离弃
感动上天，死心塌地爱你
今生的相遇，注定了，我，爱，你

第6章：相别
——————————————
今世的轮回，爱了你无悔
下辈子还要相会
相思的美味，梦里的相对
来世要紧紧，的跟随
蝴蝶空中飞，述说的很美
感动了月老，的体会
来生的相会，红线来牵随

第7章：结局
————————
生生世世与你一起轮回
生生世世与你一起轮回

专一爱
======================================
第1章：相遇
——————————————
那天下午，我们不期而遇
听这个暖洋洋的，浪漫歌曲
点点滴滴，回忆，那么有趣
把这个午后打扮成，文艺剧
三生石上，刻着你的名字
千山过尽，有缘千里来相聚
红尘擦肩，有你无所畏惧
今生的相遇，你，是，我，的，伴侣

第2章：相识
——————————————
时间的左右，再次的相遇
沧海水边听一曲
巫山的云上，写下了一句
这辈子我要以身相许
难得有情郎，注定是伴侣
就像牛郎和织女
好好的爱你，送你春光和煦
月上了梢头相思屡屡

第3章：相谈
——————————————
风云的流转，白头不相离，
把这份甜蜜好好的，去继，续
惊世不凡，的情无需根据，
幸福里享受，化作相思一缕
日影如飞，带着太多情趣，
此情绵绵守候在你，人，生旅
花香满园，拥抱旷世细雨
风情的款款，他日，还再，相聚

第4章：相思
——————————————
微笑里感动，寄卿又一曲
不问曲终人散聚
感受你的气息，体会你的爱意
真的真的不能没有你
必经的路上，幸福和情趣
遍地是，情思缕缕
多年的以后，还要与你耳语
会用一生好好的陪你

第5章：相知
——————————————
这天下午，我们谈着嫁娶
彼此的心中有了，点点犹豫
习惯想念，你的字字句句
把甜蜜事刻在，这首，老歌曲
人约黄昏，声音那么犹豫
人情和情人，奇妙感觉些许
天长地久，死心塌地赢取
今生的相遇，全部是，你，步，履

第6章：相别
——————————————
相思无尽处，突然的离去
生活也变得无趣，
一世的光阴，何日再相聚
留下这片片，的思虑
朦胧的月光，低叹着情绪
守候着往日，的歌曲
往后的岁月，注定难继续

第7章：结局
——————————————
倦鸟回巢伴着衣衫褴褛
倦鸟回巢伴着衣衫褴褛