胖子不是一口吃成滴！
全部博文（32）
分类： Oracle
2016-06-05 18:35:48
原文地址：如何在数据块级别手工构造记录 作者：TOMSYAN
首先需要说明的是在实际中这种做法是没啥意义的，搞这个东西纯属个人兴趣。
做这个例子需要对数据块结构有一定的了解，关于这方面网上有很多说明，就不在一一说明了。
测试表结构如下：
SQL> desc scott.t;
Name Null? Type
----------------------------------------- -------- ----------------------------
ID NUMBER(4)
NAME VARCHAR2(30)
SQL> select * from scott.t;
ID NAME
---------- ------------------------------------------------------------
1 cpic
2 huateng
SQL> select dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block# from scott.t;
FILE# BLOCK#
---------- ----------
4 198
4 198
SQL> select name from v$dbfile where file#=4;
NAME
--------------------------------------------------------------------------------
/test/orcl/orcl/users01.dbf
BBED> set filename '/test/orcl/orcl/users01.dbf'
FILENAME /test/orcl/orcl/users01.dbf
BBED> set block 198
BLOCK# 198
BBED> map /v
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Dba:0x00000000
------------------------------------------------------------
KTB Data Block (Table/Cluster)
struct kcbh, 20 bytes @0
ub1 type_kcbh @0
ub1 frmt_kcbh @1
ub1 spare1_kcbh @2
ub1 spare2_kcbh @3
ub4 rdba_kcbh @4
ub4 bas_kcbh @8
ub2 wrp_kcbh @12
ub1 seq_kcbh @14
ub1 flg_kcbh @15
ub2 chkval_kcbh @16
ub2 spare3_kcbh @18
struct ktbbh, 72 bytes @20
ub1 ktbbhtyp @20
union ktbbhsid, 4 bytes @24
struct ktbbhcsc, 8 bytes @28
b2 ktbbhict @36
ub1 ktbbhflg @38
ub1 ktbbhfsl @39
ub4 ktbbhfnx @40
struct ktbbhitl[2], 48 bytes @44
struct kdbh, 14 bytes @100
ub1 kdbhflag @100
b1 kdbhntab @101
b2 kdbhnrow @102
sb2 kdbhfrre @104
sb2 kdbhfsbo @106
sb2 kdbhfseo @108
b2 kdbhavsp @110
b2 kdbhtosp @112
struct kdbt[1], 4 bytes @114
b2 kdbtoffs @114
b2 kdbtnrow @116
sb2 kdbr[2] @118
ub1 freespace[8041] @122
ub1 rowdata[25] @8163
ub4 tailchk @8188
BBED> p kdbr
sb2 kdbr[0] @118 8077
sb2 kdbr[1] @120 8063
BBED> p rowdata
ub1 rowdata[0] @8163 0x2c
ub1 rowdata[1] @8164 0x02
ub1 rowdata[2] @8165 0x02
ub1 rowdata[3] @8166 0x02
ub1 rowdata[4] @8167 0xc1
ub1 rowdata[5] @8168 0x03
ub1 rowdata[6] @8169 0x07
ub1 rowdata[7] @8170 0x68
ub1 rowdata[8] @8171 0x75
ub1 rowdata[9] @8172 0x61
ub1 rowdata[10] @8173 0x74
ub1 rowdata[11] @8174 0x65
ub1 rowdata[12] @8175 0x6e
ub1 rowdata[13] @8176 0x67
ub1 rowdata[14] @8177 0x2c
ub1 rowdata[15] @8178 0x01
ub1 rowdata[16] @8179 0x02
ub1 rowdata[17] @8180 0x02
ub1 rowdata[18] @8181 0xc1
ub1 rowdata[19] @8182 0x02
ub1 rowdata[20] @8183 0x04
ub1 rowdata[21] @8184 0x63
ub1 rowdata[22] @8185 0x70
ub1 rowdata[23] @8186 0x69
ub1 rowdata[24] @8187 0x63
BBED> x /rnc offset 8163
rowdata[0] @8163
----------
: 0x2c (KDRHFL, KDRHFF, KDRHFH)
: 0x02
: 2
col 0[2] @8166: 2
col 1[7] @8169: huateng
BBED> x /rnc offset 8177
rowdata[14] @8177
-----------
: 0x2c (KDRHFL, KDRHFF, KDRHFH)
: 0x01
: 2
col 0[2] @8180: 1
col 1[4] @8183: cpic
从上面可以看到数据块中有2条记录,数据存放在块偏移量8163到8187这几个字节中。
我的测试环境是AIX 平台，endian_format 是BIG的 (如果是little的平台，构造数据的时候需要注意存放顺序)。
构造数据之前需要了解一点基础知识：
下面的信息摘自ORACLE 10G CONCEPTS:
A row fully contained in one block has at least 3 bytes of row header. After the row header information, each row contains column length and data. The column length requires 1 byte for columns that store 250
bytes or less, or 3 bytes for columns that store more than 250 bytes, and precedes the column data. Space required for column data depends on the datatype. If the datatype of a column is variable length, then
the space required to hold a value can grow and shrink with updates to the data.
To conserve space, a null in a column only stores the column length (zero). Oracle does not store data for the null column. Also, for trailing null columns, Oracle does not even store the column length.
普通的一条行记录在数据块中的格式为：
ROW PIECE = flag( fb 1bytes ) + lock (lb 1bytes ) + cols(cc 1 bytes ) + col0 length (指记录col长度的) + col0 bytes + col1 length + col1 bytes + .........
如果列的长度超过250个字节，ORACLE将会用3个字节来存放长度，否则用1个字节存放长度，不明白的话可以看ORACLE CONCEPTS。
下面我们构造一条ID=3,NAME=yanshoupeng的记录。
我们可以根据已有的数据记录来构造记录，只需要改一下列存储的长度及其值即可。
2,huateng 这条记录在数据块中的存储为：
flag(1 byte) lock byte(1 byte) cols(1 byte) 存储列1的长度(1 byte) 列1的值(2 bytes) 存储列2的长度 (1 byte) 列2的值(7 bytes)
2c 02 02 02 c103 07 68756174656e67
根据上面的信息来构造id=3,name=yanshoupeng的记录。
SQL> select dump(3,16) from dual;
DUMP(3,16)
----------------------------------
Typ=2 Len=2: c1,4
SQL> select dump('yanshoupeng',16) from dual;
DUMP('YANSHOUPENG',16)
--------------------------------------------------------------------------------
Typ=96 Len=11: 79,61,6e,73,68,6f,75,70,65,6e,67
构造后的记录存储在块中的信息如下：
flag(1 byte) lock byte(1 byte) cols(1 byte) 存储列1的长度(1 byte) 列1的值(2 bytes) 存储列2的长度 (1 byte) 列2的值(11 bytes)
2c 02 02 02 c104 0b 79616e73686f7570656e67
下面我们将这些信息写入数据块中：
BBED> p rowdata
ub1 rowdata[0] @8163 0x2c
ub1 rowdata[1] @8164 0x01
ub1 rowdata[2] @8165 0x02
ub1 rowdata[3] @8166 0x02
ub1 rowdata[4] @8167 0xc1
ub1 rowdata[5] @8168 0x03
ub1 rowdata[6] @8169 0x07
ub1 rowdata[7] @8170 0x68
ub1 rowdata[8] @8171 0x75
ub1 rowdata[9] @8172 0x61
ub1 rowdata[10] @8173 0x74
ub1 rowdata[11] @8174 0x65
ub1 rowdata[12] @8175 0x6e
ub1 rowdata[13] @8176 0x67
ub1 rowdata[14] @8177 0x2c
ub1 rowdata[15] @8178 0x01
ub1 rowdata[16] @8179 0x02
ub1 rowdata[17] @8180 0x02
ub1 rowdata[18] @8181 0xc1
ub1 rowdata[19] @8182 0x02
ub1 rowdata[20] @8183 0x04
ub1 rowdata[21] @8184 0x63
ub1 rowdata[22] @8185 0x70
ub1 rowdata[23] @8186 0x69
ub1 rowdata[24] @8187 0x63
BBED> set offset 8163
OFFSET 8163
BBED> dump /v count 32
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8163 to 8191 Dba:0x00000000
-------------------------------------------------------
2c010202 c1030768 75617465 6e672c01 l ,......huateng,.
0202c102 04637069 63f1a106 01 l .....cpic....
<16 bytes per line>
BBED> set offset -2
OFFSET 8161
BBED> modify /x 6e67
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8161 to 8191 Dba:0x00000000
------------------------------------------------------------------------
6e672c01 0202c103 07687561 74656e67 2c010202 c1020463 706963f1 a10601
<32 bytes per line>
BBED> set offset -2
OFFSET 8159
BBED> modify /x 7065
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8159 to 8190 Dba:0x00000000
------------------------------------------------------------------------
70656e67 2c010202 c1030768 75617465 6e672c01 0202c102 04637069 63f1a106
<32 bytes per line>
BBED> set offset -2
OFFSET 8157
BBED> modify /x 6f75
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8157 to 8188 Dba:0x00000000
------------------------------------------------------------------------
6f757065 6e672c01 0202c103 07687561 74656e67 2c010202 c1020463 706963f1
<32 bytes per line>
BBED> set offset -2
OFFSET 8155
BBED> modify /x 7368
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8155 to 8186 Dba:0x00000000
------------------------------------------------------------------------
73686f75 70656e67 2c010202 c1030768 75617465 6e672c01 0202c102 04637069
<32 bytes per line>
BBED> set offset -2
OFFSET 8153
BBED> modify /x 616e
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8153 to 8184 Dba:0x00000000
------------------------------------------------------------------------
616e7368 6f757065 6e672c01 0202c103 07687561 74656e67 2c010202 c1020463
<32 bytes per line>
BBED> set offset -2
OFFSET 8151
BBED> modify /x 0b79
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8151 to 8182 Dba:0x00000000
------------------------------------------------------------------------
0b79616e 73686f75 70656e67 2c010202 c1030768 75617465 6e672c01 0202c102
<32 bytes per line>
BBED> set offset -2
OFFSET 8149
BBED> modify /x c104
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8149 to 8180 Dba:0x00000000
------------------------------------------------------------------------
c1040b79 616e7368 6f757065 6e672c01 0202c103 07687561 74656e67 2c010202
<32 bytes per line>
BBED> set offset -2
OFFSET 8147
BBED> modify /x 0202
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8147 to 8178 Dba:0x00000000
------------------------------------------------------------------------
0202c104 0b79616e 73686f75 70656e67 2c010202 c1030768 75617465 6e672c01
<32 bytes per line>
BBED> set offset -2
OFFSET 8145
BBED> modify /x 2c02
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8145 to 8176 Dba:0x00000000
------------------------------------------------------------------------
2c020202 c1040b79 616e7368 6f757065 6e672c01 0202c103 07687561 74656e67
<32 bytes per line>
BBED> dump /v count 64
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8145 to 8191 Dba:0x00000000
-------------------------------------------------------
2c020202 c1040b79 616e7368 6f757065 l ,......yanshoupe
6e672c01 0202c103 07687561 74656e67 l ng,......huateng
2c010202 c1020463 706963f1 a10601 l ,......cpic....
<16 bytes per line>
BBED> x /rnc
freespace[8023] @8145
---------------
: 0x2c (KDRHFL, KDRHFF, KDRHFH)
: 0x02
: 2
col 0[2] @8148: 3
col 1[11] @8151: yanshoupeng
好了，数据已经构造出来了。但是现在数据还不能用。我们还需要在row directory中增加这条记录的信息。
BBED> p kdbr
sb2 kdbr[0] @118 8077
sb2 kdbr[1] @120 8063
目前row directory中有2条记录的信息，每条记录占用2个字节，存放指向实际数据开始的相对地址。
这个偏移量是通过如下算法实现的：
FOR ASSM
real offset = kdbr[n] + 76 + (itls-1) *24
FOR MSSM
real offset= kdbr[n] + 68 + (itls-1) *24
本例中采用的ASSM，记录0的偏移量 real offset = kdbr[0] + 76 + (2-1) *24 = 8077 + 76 + 24 = 8177 --struct ktbbhitl[2], 48 bytes @44 从这里可以看到itls为2
8177也就是记录0的开始位置 如下
BBED> p rowdata
ub1 rowdata[0] @8163 0x2c --记录1的开始位置
ub1 rowdata[1] @8164 0x01
ub1 rowdata[2] @8165 0x02
ub1 rowdata[3] @8166 0x02
ub1 rowdata[4] @8167 0xc1
ub1 rowdata[5] @8168 0x03
ub1 rowdata[6] @8169 0x07
ub1 rowdata[7] @8170 0x68
ub1 rowdata[8] @8171 0x75
ub1 rowdata[9] @8172 0x61
ub1 rowdata[10] @8173 0x74
ub1 rowdata[11] @8174 0x65
ub1 rowdata[12] @8175 0x6e
ub1 rowdata[13] @8176 0x67
ub1 rowdata[14] @8177 0x2c --记录0的开始位置 8177
ub1 rowdata[15] @8178 0x01
ub1 rowdata[16] @8179 0x02
ub1 rowdata[17] @8180 0x02
ub1 rowdata[18] @8181 0xc1
ub1 rowdata[19] @8182 0x02
ub1 rowdata[20] @8183 0x04
ub1 rowdata[21] @8184 0x63
ub1 rowdata[22] @8185 0x70
ub1 rowdata[23] @8186 0x69
ub1 rowdata[24] @8187 0x63
刚刚我们构造的记录3的real offset = 8145,那么相对偏移量就是8045，我们把这个值存放到row directory中。
BBED> set offset 118
OFFSET 118
BBED> dump /v count 16
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 118 to 133 Dba:0x00000000
-------------------------------------------------------
1f8d1f7f 00000100 00c10100 00c10000 l ................
<16 bytes per line>
BBED> modify /x 1f6d offset +4
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 122 to 137 Dba:0x00000000
------------------------------------------------------------------------
1f6d0100 00c10100 00c10000 00000000
<32 bytes per line>
BBED> set offset 118
OFFSET 118
BBED> dump /v count 16
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 118 to 133 Dba:0x00000000
-------------------------------------------------------
1f8d1f7f 1f6d0100 00c10100 00c10000 l .....m..........
<16 bytes per line>
BBED> p kdbr
sb2 kdbr[0] @118 8077
sb2 kdbr[1] @120 8063
BBED> set offset 102
OFFSET 102
BBED> dump /v count 16
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 102 to 117 Dba:0x00000000
-------------------------------------------------------
0002ffff 00161f7f 1f691f69 00000002 l .........i.i....
<16 bytes per line>
BBED> modify /x 0003
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 102 to 117 Dba:0x00000000
------------------------------------------------------------------------
0003ffff 00161f7f 1f691f69 00000002
<32 bytes per line>
BBED> set offset 116
OFFSET 116
BBED> dump /v count 16
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 116 to 131 Dba:0x00000000
-------------------------------------------------------
00021f8d 1f7f1f6d 010000c1 010000c1 l .......m........
<16 bytes per line>
BBED> modify /x 0003
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 116 to 131 Dba:0x00000000
------------------------------------------------------------------------
00031f8d 1f7f1f6d 010000c1 010000c1
<32 bytes per line>
BBED> p kdbr
sb2 kdbr[0] @118 8077
sb2 kdbr[1] @120 8063
sb2 kdbr[2] @122 8045
可以看到 row directory中的信息构造出来了。
剩下的工作还需要修改可用空间，及其开始偏移量及其结束偏移量。
BBED> map /v
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Dba:0x00000000
------------------------------------------------------------
KTB Data Block (Table/Cluster)
struct kcbh, 20 bytes @0
ub1 type_kcbh @0
ub1 frmt_kcbh @1
ub1 spare1_kcbh @2
ub1 spare2_kcbh @3
ub4 rdba_kcbh @4
ub4 bas_kcbh @8
ub2 wrp_kcbh @12
ub1 seq_kcbh @14
ub1 flg_kcbh @15
ub2 chkval_kcbh @16
ub2 spare3_kcbh @18
struct ktbbh, 72 bytes @20
ub1 ktbbhtyp @20
union ktbbhsid, 4 bytes @24
struct ktbbhcsc, 8 bytes @28
b2 ktbbhict @36
ub1 ktbbhflg @38
ub1 ktbbhfsl @39
ub4 ktbbhfnx @40
struct ktbbhitl[2], 48 bytes @44
struct kdbh, 14 bytes @100
ub1 kdbhflag @100
b1 kdbhntab @101
b2 kdbhnrow @102
sb2 kdbhfrre @104
sb2 kdbhfsbo @106
sb2 kdbhfseo @108
b2 kdbhavsp @110
b2 kdbhtosp @112
struct kdbt[1], 4 bytes @114
b2 kdbtoffs @114
b2 kdbtnrow @116
sb2 kdbr[3] @118
ub1 freespace[8041] @124
ub1 rowdata[25] @8165
ub4 tailchk @8188
BBED> p kdbhfsbo
sb2 kdbhfsbo @106 22
BBED> p kdbhfseo
sb2 kdbhfseo @108 8063
BBED> p kdbhavsp
b2 kdbhavsp @110 8041
BBED> p kdbhtosp
b2 kdbhtosp @112 8041
BBED> dump /v count 16 offset 106
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 106 to 121 Dba:0x00000000
-------------------------------------------------------
00161f7f 1f691f69 00000003 1f8d1f7f l .....i.i........
<16 bytes per line>
BBED> modify /x 0018 offset 106
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 106 to 121 Dba:0x00000000
------------------------------------------------------------------------
00181f7f 1f691f69 00000003 1f8d1f7f
<32 bytes per line>
BBED> modify /x 1f6d offset 108
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 108 to 123 Dba:0x00000000
------------------------------------------------------------------------
1f6d1f69 1f690000 00031f8d 1f7f1f6d
<32 bytes per line>
BBED> modify /x 1f55 offset 110
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 110 to 125 Dba:0x00000000
------------------------------------------------------------------------
1f551f69 00000003 1f8d1f7f 1f6d0100
<32 bytes per line>
BBED> modify /x 1f55 offset 112
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 112 to 127 Dba:0x00000000
------------------------------------------------------------------------
1f550000 00031f8d 1f7f1f6d 010000c1
<32 bytes per line>
BBED> map /v
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Dba:0x00000000
------------------------------------------------------------
KTB Data Block (Table/Cluster)
struct kcbh, 20 bytes @0
ub1 type_kcbh @0
ub1 frmt_kcbh @1
ub1 spare1_kcbh @2
ub1 spare2_kcbh @3
ub4 rdba_kcbh @4
ub4 bas_kcbh @8
ub2 wrp_kcbh @12
ub1 seq_kcbh @14
ub1 flg_kcbh @15
ub2 chkval_kcbh @16
ub2 spare3_kcbh @18
struct ktbbh, 72 bytes @20
ub1 ktbbhtyp @20
union ktbbhsid, 4 bytes @24
struct ktbbhcsc, 8 bytes @28
b2 ktbbhict @36
ub1 ktbbhflg @38
ub1 ktbbhfsl @39
ub4 ktbbhfnx @40
struct ktbbhitl[2], 48 bytes @44
struct kdbh, 14 bytes @100
ub1 kdbhflag @100
b1 kdbhntab @101
b2 kdbhnrow @102
sb2 kdbhfrre @104
sb2 kdbhfsbo @106
sb2 kdbhfseo @108
b2 kdbhavsp @110
b2 kdbhtosp @112
struct kdbt[1], 4 bytes @114
b2 kdbtoffs @114
b2 kdbtnrow @116
sb2 kdbr[3] @118
ub1 freespace[8021] @124
ub1 rowdata[43] @8145
ub4 tailchk @8188
BBED> p rowdata
ub1 rowdata[0] @8145 0x2c
ub1 rowdata[1] @8146 0x02
ub1 rowdata[2] @8147 0x02
ub1 rowdata[3] @8148 0x02
ub1 rowdata[4] @8149 0xc1
ub1 rowdata[5] @8150 0x04
ub1 rowdata[6] @8151 0x0b
ub1 rowdata[7] @8152 0x79
ub1 rowdata[8] @8153 0x61
ub1 rowdata[9] @8154 0x6e
ub1 rowdata[10] @8155 0x73
ub1 rowdata[11] @8156 0x68
ub1 rowdata[12] @8157 0x6f
ub1 rowdata[13] @8158 0x75
ub1 rowdata[14] @8159 0x70
ub1 rowdata[15] @8160 0x65
ub1 rowdata[16] @8161 0x6e
ub1 rowdata[17] @8162 0x67
ub1 rowdata[18] @8163 0x2c
ub1 rowdata[19] @8164 0x01
ub1 rowdata[20] @8165 0x02
ub1 rowdata[21] @8166 0x02
ub1 rowdata[22] @8167 0xc1
ub1 rowdata[23] @8168 0x03
ub1 rowdata[24] @8169 0x07
ub1 rowdata[25] @8170 0x68
ub1 rowdata[26] @8171 0x75
ub1 rowdata[27] @8172 0x61
ub1 rowdata[28] @8173 0x74
ub1 rowdata[29] @8174 0x65
ub1 rowdata[30] @8175 0x6e
ub1 rowdata[31] @8176 0x67
ub1 rowdata[32] @8177 0x2c
ub1 rowdata[33] @8178 0x01
ub1 rowdata[34] @8179 0x02
ub1 rowdata[35] @8180 0x02
ub1 rowdata[36] @8181 0xc1
ub1 rowdata[37] @8182 0x02
ub1 rowdata[38] @8183 0x04
ub1 rowdata[39] @8184 0x63
ub1 rowdata[40] @8185 0x70
ub1 rowdata[41] @8186 0x69
ub1 rowdata[42] @8187 0x63
BBED> sum apply
Check value for File 0, Block 198:
current = 0x6245, required = 0x6245
BBED> verify
DBVERIFY - Verification starting
FILE = /test/orcl/orcl/users01.dbf
BLOCK = 198
Block Checking: DBA = 16777414, Block Type = KTB-managed data block
data header at 0x1104c7064
kdbchk: row locked by non-existent transaction
table=0 slot=2
lockid=2 ktbbhitc=2
Block 198 failed with check code 6101
DBVERIFY - Verification complete
Total Blocks Examined : 1
Total Blocks Processed (Data) : 1
Total Blocks Failing (Data) : 1
Total Blocks Processed (Index): 0
Total Blocks Failing (Index): 0
Total Blocks Empty : 0
Total Blocks Marked Corrupt : 0
Total Blocks Influx : 0
BBED> modify /x 2c00
File: /test/orcl/orcl/users01.dbf (0)
Block: 198 Offsets: 8145 to 8160 Dba:0x00000000
------------------------------------------------------------------------
2c000202 c1040b79 616e7368 6f757065
<32 bytes per line>
BBED> sum apply
Check value for File 0, Block 198:
current = 0x6045, required = 0x6045
BBED> verify
DBVERIFY - Verification starting
FILE = /test/orcl/orcl/users01.dbf
BLOCK = 198
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
回到SQLPLUS中查看可以看到构造的记录已经查询到了。
SQL> select * from scott.t;
ID NAME
---------- ------------------------------------------------------------
1 cpic
2 huateng
3 yanshoupeng
