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本篇内容介绍了“Oracle BBED 怎么修改数据块中的数据”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让丸趣 TV 小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
BBED 修改数据:
建立测试数据:
SQL create table dbhang (id number,name varchar2(20));
Table created.
SQL insert into dbhang values(1,’baoyuhang’);
1 row created.
SQL commit;
Commit complete.
SQL select * from dbhang;
ID NAME
1 baoyuhang
查看文件号,块号,行号:
select
rowid,
dbms_rowid.rowid_relative_fno(rowid)rel_fno,
dbms_rowid.rowid_block_number(rowid)blockno,
dbms_rowid.rowid_row_number(rowid) rowno
from dbhang;
ROWID REL_FNO BLOCKNO ROWNO
AAAVoxAABAAAW8BAAA 1 93953 0
查询数据文件:
SQL select file# ||‘‘||name ||‘’|| bytes from v$datafile;
FILE#||’’||NAME||’’||BYTES
1 /oracle/app/oradata/prod/system01.dbf786432000
2 /oracle/app/oradata/prod/sysaux01.dbf545259520
3 /oracle/app/oradata/prod/undotbs01.dbf94371840
4 /oracle/app/oradata/prod/users01.dbf5242880
5 /oracle/app/oradata/prod/example01.dbf328335360
6 /oracle/app/oradata/prod/dbhang01.dbf52428800
7 /oracle/app/oradata/prod/dbhang02.dbf52428800
将以上查询的信息保存在文本中:
[oracle
@server1 ~]$ cat datafile.txt
1 /oracle/app/oradata/prod/system01.dbf 786432000
2 /oracle/app/oradata/prod/sysaux01.dbf 545259520
3 /oracle/app/oradata/prod/undotbs01.dbf 94371840
4 /oracle/app/oradata/prod/users01.dbf 5242880
5 /oracle/app/oradata/prod/example01.dbf 328335360
6 /oracle/app/oradata/prod/dbhang01.dbf 52428800
7 /oracle/app/oradata/prod/dbhang02.dbf 52428800
关闭数据库:
SQL shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
创建 BBED 参数文件:
[oracle
@server1 ~]$ cat bbed.par
blocksize=8192
listfile=/home/oracle/datafile.txt // 指定文本文件
mode=edit // 编辑模式
现将数据 baoyuhang 修改为 bbbyuhang
连接 BBED,进行数据定位:
[oracle
@server1 ~]$ bbed parfile=/home/oracle/bbed.par
Password:
BBED: Release 2.0.0.0.0 – Limited Production on Thu Jul 30 05:59:45 2020
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
* !!! For Oracle Internal Use only !!!
*
BBED
指定 1 号文件 93953 号块:
BBED set dba 1,93953 offset 0
DBA 0x00416f01 (4288257 1,93953)
OFFSET 0
定位数据:(确定数据在 block 中的偏移量)
BBED find /c baoyuhang
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953 Offsets: 8179 to 8191 Dba:0x00416f01
62616f79 7568616e 6704066c 38
dump 查看一下 offset 8179 信息:
BBED dump /v dba 1,93953 offset 8179 count 128
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953 Offsets: 8179 to 8191 Dba:0x00416f01
62616f79 7568616e 6704066c 38 l baoyuhang..l8
Offsets: 8179 to 8191 代表这一行的地址。
也是说 baoyuhang 属于 8179-8191
b:8179
a:8180
o:8181
修改 block 将 bao 替换为 bbb:
BBED
modify /c bbb dba 1,93953 offset 8179
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953 Offsets: 8179 to 8191 Dba:0x00416f01
62626279 7568616e 670106ba 3c
再次查看修改后的数据:
BBED dump /v dba 1,93953 offset 8179 count 128
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953 Offsets: 8179 to 8191 Dba:0x00416f01
62626279 7568616e 6704066c 38 l
bbbyuhang..l8
应用变更:
BBED sum dba 1,93953 apply
Check value for File 1, Block 93953:
current = 0x29a2, required = 0x29a2
回到 sqlplus 查询修改后的数据
SQL startup;
ORACLE instance started.
Total System Global Area 830930944 bytes
Fixed Size 2257800 bytes
Variable Size 541068408 bytes
Database Buffers 281018368 bytes
Redo Buffers 6586368 bytes
Database mounted.
Database opened.
SQL select * from dbhang;
ID NAME
1 bbbyuhang
修改完毕.
BBED 的安装:
http://blog.itpub.net/69975956/viewspace-2707944/
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