06 使用bbed提交delete的数据--01

使用bbed模拟delete提交操作

--session 1

TEST@ orcl >create table tt(id int,name varchar2(100));
Table created.
TEST@ orcl >insert into tt values(1,'AAAAA');
1 row created.
TEST@ orcl > insert into tt values(2,'BBBBB');
1 row created.
TEST@ orcl >insert into tt values(3,'CCCCC');
1 row created.
TEST@ orcl >COMMIT;
Commit complete.
TEST@ orcl > alter system flush buffer_cache;
System altered.
TEST@ orcl > select rowid,id,name,DBMS_ROWID.ROWID_RELATIVE_FNO(rowid) file#,DBMS_ROWID.ROWID_BLOCK_NUMBER(rowid) block# from test.tt;
ROWID               ID NAME            FILE#      BLOCK#
------------------ ---------- -------------------- ---------- ----------
AAAVW0AAFAAAAi3AAA        1 AAAAA                5        2231
AAAVW0AAFAAAAi3AAB        2 BBBBB                5        2231
AAAVW0AAFAAAAi3AAC        3 CCCCC                5        2231
TEST@ orcl >alter system checkpoint;
System altered.
TEST@ orcl > alter system dump datafile 5 block 2231;
System altered.
TEST@ orcl >select * from v$diag_info where name='Default Trace File';INST_ID NAME         VALUE
---------- -------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1 Default Trace File    /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_18408.trc
TEST@ orcl >select * from tt;ID NAME
---------- --------------------1 AAAAA2 BBBBB3 CCCCC

dump的结果

--session 1执行删除操作

TEST@ orcl >delete from tt where name='AAAAA';
1 row deleted.
TEST@ orcl > select * from tt;ID NAME
---------- --------------------2 BBBBB3 CCCCC

--session2执行操作

SQL> alter system checkpoint;
System altered.
SQL> alter system flush buffer_cache;
System altered.
SQL> alter system flush shared_pool;
System altered.
SQL> alter system dump datafile 5 block 2231;
System altered.
SQL> select * from v$diag_info where name='Default Trace File';INST_ID NAME
---------- ----------------------------------------------------------------
VALUE
--------------------------------------------------------------------------------1 Default Trace File
/u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_22529.trc
SQL> alter system dump datafile 5 block 2231;
System altered.
SQL> select * from v$diag_info where name='Default Trace File';INST_ID NAME
---------- ----------------------------------------------------------------
VALUE
--------------------------------------------------------------------------------1 Default Trace File
/u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_22529.trc

dump结果

--session 3 bbed会话

BBED>  set file 5 block 2231FILE#              5BLOCK#             2231
BBED> p ktbbh
struct ktbbh, 72 bytes                      @20      ub1 ktbbhtyp                             @20       0x01 (KDDBTDATA)union ktbbhsid, 4 bytes                  @24      ub4 ktbbhsg1                          @24       0x000155b4ub4 ktbbhod1                          @24       0x000155b4struct ktbbhcsc, 8 bytes                 @28      ub4 kscnbas                           @28       0x0092cb9bub2 kscnwrp                           @32       0x0000sb2 ktbbhict                             @36       2ub1 ktbbhflg                             @38       0x32 (NONE)ub1 ktbbhfsl                             @39       0x00ub4 ktbbhfnx                             @40       0x014008b0struct ktbbhitl[0], 24 bytes             @44      struct ktbitxid, 8 bytes              @44      ub2 kxidusn                        @44       0x000aub2 kxidslt                        @46       0x000bub4 kxidsqn                        @48       0x00004456struct ktbituba, 8 bytes              @52      ub4 kubadba                        @52       0x00c002d8ub2 kubaseq                        @56       0x0175ub1 kubarec                        @58       0x08ub2 ktbitflg                          @60       0x8000 (KTBFCOM)union _ktbitun, 2 bytes               @62      sb2 _ktbitfsc                      @62       0ub2 _ktbitwrp                      @62       0x0000ub4 ktbitbas                          @64       0x0092cb3dstruct ktbbhitl[1], 24 bytes             @68      struct ktbitxid, 8 bytes              @68      ub2 kxidusn                        @68       0x0008ub2 kxidslt                        @70       0x0011ub4 kxidsqn                        @72       0x000078b4struct ktbituba, 8 bytes              @76      ub4 kubadba                        @76       0x00c00397ub2 kubaseq                        @80       0x017eub1 kubarec                        @82       0x1dub2 ktbitflg                          @84       0x0001 (NONE)union _ktbitun, 2 bytes               @86      sb2 _ktbitfsc                      @86       10ub2 _ktbitwrp                      @86       0x000aub4 ktbitbas                          @88       0x00000000

bbed执行修改

BBED> m /x 0080 offset 84
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) yFile: /u01/app/oracle/oradata/orcl/test01.dbf (5)Block: 2231             Offsets:   84 to  595           Dba:0x014008b7
------------------------------------------------------------------------00800a00 00000000 00000000 00000000 00010300 ffff1800 741f5c1f 681f0000 03008c1f 801f741f c21db41e 770b6e0c 480d240e 1d0f2510 21110312 1513f013 <32 bytes per line>
BBED> sum apply
Check value for File 5, Block 2231:
current = 0x1761, required = 0x1761

再次查看

BBED> p ktbbh
struct ktbbh, 72 bytes                      @20      ub1 ktbbhtyp                             @20       0x01 (KDDBTDATA)union ktbbhsid, 4 bytes                  @24      ub4 ktbbhsg1                          @24       0x000155b4ub4 ktbbhod1                          @24       0x000155b4struct ktbbhcsc, 8 bytes                 @28      ub4 kscnbas                           @28       0x0092cb9bub2 kscnwrp                           @32       0x0000sb2 ktbbhict                             @36       2ub1 ktbbhflg                             @38       0x32 (NONE)ub1 ktbbhfsl                             @39       0x00ub4 ktbbhfnx                             @40       0x014008b0struct ktbbhitl[0], 24 bytes             @44      struct ktbitxid, 8 bytes              @44      ub2 kxidusn                        @44       0x000aub2 kxidslt                        @46       0x000bub4 kxidsqn                        @48       0x00004456struct ktbituba, 8 bytes              @52      ub4 kubadba                        @52       0x00c002d8ub2 kubaseq                        @56       0x0175ub1 kubarec                        @58       0x08ub2 ktbitflg                          @60       0x8000 (KTBFCOM)union _ktbitun, 2 bytes               @62      sb2 _ktbitfsc                      @62       0ub2 _ktbitwrp                      @62       0x0000ub4 ktbitbas                          @64       0x0092cb3dstruct ktbbhitl[1], 24 bytes             @68      struct ktbitxid, 8 bytes              @68      ub2 kxidusn                        @68       0x0008ub2 kxidslt                        @70       0x0011ub4 kxidsqn                        @72       0x000078b4struct ktbituba, 8 bytes              @76      ub4 kubadba                        @76       0x00c00397ub2 kubaseq                        @80       0x017eub1 kubarec                        @82       0x1dub2 ktbitflg                          @84       0x8000 (KTBFCOM)union _ktbitun, 2 bytes               @86      sb2 _ktbitfsc                      @86       10ub2 _ktbitwrp                      @86       0x000aub4 ktbitbas                          @88       0x00000000

BBED> p *kdbr[0]
rowdata[24]
-----------
ub1 rowdata[24]                             @8176     0x3c ###状态为3c，标记已经删除BBED> x/rncccccc
rowdata[24]                                 @8176
-----------
flag@8176: 0x3c (KDRHFL, KDRHFF, KDRHFD, KDRHFH)
lock@8177: 0x02
cols@8178:    0

BBED> dump /v offset 8176 count 20File: /u01/app/oracle/oradata/orcl/test01.dbf (5)Block: 2231    Offsets: 8176 to 8191  Dba:0x014008b7
-------------------------------------------------------3c020202 c1020541 41414141 01069bcb l <...?.AAAAA...<16 bytes per line>

--sessino 2 再次执行dumpfile

SQL> alter system dump datafile 5 block 2231;
System altered.
SQL> select * from v$diag_info where name='Default Trace File';INST_ID NAME
---------- ----------------------------------------------------------------
VALUE
--------------------------------------------------------------------------------1 Default Trace File
/u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_22529.trc

--这里的状态已经显示为commit

再开session 查询表tt的数据

---发现别的session会话还在~~~~~貌似修改没起到作用？但是dump file已经显示为commit了啊~~~~~不解

有参考帖子

http://www.xifenfei.com/2013/03/bbed%E6%A8%A1%E6%8B%9F%E6%8F%90%E4%BA%A4%E4%BA%8B%E5%8A%A1%E4%B8%80%E4%B9%8B%E4%BF%AE%E6%94%B9itl.html

转载于:https://www.cnblogs.com/yhq1314/p/10953566.html

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