将dba转换成file号block号

摘自：http://www.eygle.com/archives/2007/07/function_rdba_convert.html

1.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;
/

2.现在直接调用这个函数：

SQL> select getbfno('0x1800083') BFNO from dual;

BFNO
------------------------------------------------------------
datafile# is:6
datablock is:131
dump command:alter system dump datafile 6 block 131;

3. 也可以直接查询

SQL> select dbms_utility.data_block_address_file(TO_NUMBER('1800083', 'XXXXXXXX')) file_id,
     dbms_utility.data_block_address_block(TO_NUMBER('1800083', 'XXXXXXXX')) block_id from dual;  2  

   FILE_ID   BLOCK_ID
---------- ----------

注意：这里的值都是16进制的