[20140624]bbed修改数据记录.txt
上午看了链接:
http://www.itpub.net/thread-1872851-1-1.html
自己也做一下看看.
SCOTT@test> @ver
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
create table itpub_t1 (id int,name varchar2(100));
insert into itpub_t1 values(1,'AAAAA');
insert into itpub_t1 values(2,'BBBBB');
commit;
update itpub_t1 set name='aaaaa' where name='AAAAA';
commit;
SCOTT@test> select * from itpub_t1;
ID NAME
---------- --------------------
1 aaaaa
2 BBBBB
--看看自己是否能恢复数据:
SCOTT@test> select rowid,itpub_t1.* from itpub_t1;
ROWID ID NAME
------------------ ---------- --------------------
AABF2CAAEAAAAJHAAA 1 aaaaa
AABF2CAAEAAAAJHAAB 2 BBBBB
SCOTT@test> @lookup_rowid AABF2CAAEAAAAJHAAA
OBJECT FILE BLOCK ROW DBA TEXT
---------- ---------- ---------- ---------- -------------------- ----------------------------------------
286082 4 583 0 4,583 alter system dump datafile 4 block 583 ;
SCOTT@test> alter system checkpoint;
System altered.
--保证写盘.最好关闭数据库操作bbed.
BBED> set dba 4,583
DBA 0x01000247 (16777799 4,583)
BBED> p *kdbr[0]
rowdata[12]
-----------
ub1 rowdata[12] @8176 0x2c
BBED> x /rnc
rowdata[12] @8176
-----------
flag@8176: 0x2c (KDRHFL, KDRHFF, KDRHFH)
lock@8177: 0x02
cols@8178: 2
col 0[2] @8179: 1
col 1[5] @8182: aaaaa
BBED> set offset 8183
OFFSET 8183
--注意前面字符串前有一个长度指示器,偏移要加+1.
BBED> modify /c 'AAAAA'
BBED> modify /c 'AAAAA'
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
File: /u01/app/oracle11g/oradata/test/users01.dbf (4)
Block: 583 Offsets: 8183 to 8191 Dba:0x01000247
-----------------------------------------------------------------
41414141 410106ce b4
BBED> p *kdbr[0]
rowdata[12]
-----------
ub1 rowdata[12] @8176 0x2c
BBED> x /rnc
rowdata[12] @8176
-----------
flag@8176: 0x2c (KDRHFL, KDRHFF, KDRHFH)
lock@8177: 0x01
cols@8178: 2
col 0[2] @8179: 1
col 1[5] @8182: AAAAA
--ok 已经修改正确.
BBED> sum
Check value for File 4, Block 583:
current = 0x8a14, required = 0xaa14
--检查和不对.
BBED> sum apply
Check value for File 4, Block 583:
current = 0xaa14, required = 0xaa14
--重新启动数据库,ok.
SCOTT@test> select rowid,itpub_t1.* from itpub_t1;
ROWID ID NAME
------------------ ---------- --------------------
AABF2CAAEAAAAJHAAA 1 AAAAA
AABF2CAAEAAAAJHAAB 2 BBBBB
