« Oracle ASSM三级位图块结构 | Blog首页 | 7月21日-Oracle11g新特性公开课 »

DBA Scripts:转换RDBA的文件和数据块地址

昨天作测试，涉及很多rdba的转换，一般我是自己手工转换的，不过考虑到自己的书中有地方涉及这些转换，手工显然不容易解释的。

RDBA的关系参考如下链接:
http://www.eygle.com/archives/2004/08/how_to_dump_datablock.html

写了一个简单的函数，用来从RDBA中转换file#和block#出来:

CREATE OR REPLACE FUNCTION getbfno (p_dba IN VARCHAR2)
   RETURN VARCHAR2
IS
   l_str   VARCHAR2 (255) DEFAULT NULL;
   l_fno   VARCHAR2 (15);
   l_bno   VARCHAR2 (15);
BEGIN
   l_fno :=
      DBMS_UTILITY.data_block_address_file (TO_NUMBER (LTRIM (p_dba, '0x'),
                                                       'xxxxxxxx'
                                                      )
                                           );
   l_bno :=
      DBMS_UTILITY.data_block_address_block (TO_NUMBER (LTRIM (p_dba, '0x'),
                                                        'xxxxxxxx'
                                                       )
                                            );
   l_str :=
         'datafile# is:'
      || l_fno
      || CHR (10)
      || 'datablock is:'
      || l_bno
      || CHR (10)
      || 'dump command:alter system dump datafile '
      || l_fno
      || ' block '
      || l_bno
      || ';';
   RETURN l_str;
END;
/

有了这个函数，方便了很多:

SQL> col BFNO for a60
SQL> select getbfno('0x037d86de') BFNO from dual;

BFNO
------------------------------------------------------------
datafile# is:13
datablock is:4032222
dump command:alter system dump datafile 13 block 4032222;

-The End-

By eygle on 2007-07-05 21:00 | Comments (5) | FAQ | 1488 |

RDBAScript