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[20191011]拆分rowid 2.txt

原创 Oracle 作者:lfree 时间:2019-10-11 21:55:19 0 删除 编辑

[20191011]拆分rowid 2.txt

--//有了链接http://blog.itpub.net/267265/viewspace-2659612/=>[20191011]bash任意进制编码表.txt
--//转化拆分rowid在bash变得非常容易,自己写一个脚本看看.

--//Rowid 格式为:OOOOOOFFFBBBBBBRRR, data_object_id占6个字符,file占3个字符,block占6个字符,row占3个字符。当然如果存在在
--//存储中占用10个字节(32bit data_object_id +10 bit rfile# +22bit block + row 16bit)。
--//其中,O是对象ID,F是文件ID,B是块ID,R是行ID。
--//当然在普通索引中仅仅占6字节(注没有32bit data_object_id少4个字节,因为全部data_object_id都是一样的)。
--//分区表的全局索引中占10字节。

1.简单说明:

Rowid采用64位进制编码,编码如下:
A-Z <==> 0 - 25 (26)
a-z <==> 26 - 51 (26)
0-9 <==> 52 - 61 (10)
+/  <==> 62 - 63 (2)

--//一般通过调用DBMS_ROWID很容易获得相关信息,我经常使用的脚本rowid.sql如下:
set verify off
column dba format a20
column text format a40
SELECT DBMS_ROWID.ROWID_OBJECT ('&1') "OBJECT",
       DBMS_ROWID.ROWID_RELATIVE_FNO ('&1') "FILE",
       DBMS_ROWID.ROWID_BLOCK_NUMBER ('&1') "BLOCK",
       DBMS_ROWID.ROWID_ROW_NUMBER ('&1') "ROW",
       lpad('0x'||trim(to_char(dbms_utility.MAKE_DATA_BLOCK_ADDRESS(dbms_rowid.ROWID_RELATIVE_FNO('&1'),dbms_rowid.ROWID_BLOCK_NUMBER('&1')), 'XXXXXXXX')), 10) rowid_dba,
          DBMS_ROWID.ROWID_RELATIVE_FNO ('&1')
       || ','
       || DBMS_ROWID.ROWID_BLOCK_NUMBER ('&1')
          "DBA",
          'alter system dump datafile '
       || DBMS_ROWID.ROWID_RELATIVE_FNO ('&1')
       || ' block '
       || DBMS_ROWID.ROWID_BLOCK_NUMBER ('&1')
       || ' ;'
          text
  FROM DUAL;

2.测试:
SCOTT@test01p> @ ver1
PORT_STRING                    VERSION        BANNER                                                                               CON_ID
------------------------------ -------------- -------------------------------------------------------------------------------- ----------
IBMPC/WIN_NT64-9.1.0           12.2.0.1.0     Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production              0

SCOTT@test01p> select rowid ,t1.* from t1 where id in (63,64);
ROWID                      ID T1NAME
------------------ ---------- ----------------------
AAAG2DAALAAAADDAA+         63 t10000000063
AAAG2DAALAAAADDAA/         64 t10000000064

SCOTT@test01p> @ rowid AAAG2DAALAAAADDAA+
    OBJECT       FILE      BLOCK        ROW ROWID_DBA            DBA                  TEXT
---------- ---------- ---------- ---------- -------------------- -------------------- ----------------------------------------
     28035         11        195         62  0x2C000C3           11,195               alter system dump datafile 11 block 195

$ cat rowid.txt
AAAG2DAALAAAADDAA+
AAAG2DAALAAAADDAA/
AAAG2DAALAAAADDAA1

$ cat rowid.txt | xargs -I {} ./rowidx.sh {}
rowid=AAAG2DAALAAAADDAA+; data_object_id = 28035; file = 11; block = 195; row = 62
rowid=AAAG2DAALAAAADDAA/; data_object_id = 28035; file = 11; block = 195; row = 63
rowid=AAAG2DAALAAAADDAA1; data_object_id = 28035; file = 11; block = 195; row = 53

3.rowidx.sh脚本如下:
$ cat rowidx.sh
#! /bin/bash
# split rowid to object#,file#,block#,row#

odebug=${ODEBUG:-0}

v_rowid="$*"

if [ ${#v_rowid} -ne 18 ]; then
    echo "$v_rowid is illegal! length <>18"
    exit 2
fi

if [ $odebug -eq 1 ] ; then
        echo rowid="$v_rowid"
fi

out=(data_object_id file block row)
a=0
echo -n rowid="$v_rowid"
for i in ${v_rowid:0:6} ${v_rowid:6:3} ${v_rowid:9:6} ${v_rowid:15:3}
do
        #echo $i $a
        echo -n ";" ${out[$a]} "=" $(( 64#$( echo $i | tr $( echo {A..Z} {a..z} {0..9} +/ | tr -d " ")  $( echo {0..9} {a..z} {A..Z} @ _| tr -d " ")) ))
        (( a+=1))
done
echo


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