Oracle WrapʹÓ÷½·¨
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1.Ô´´úÂë
create or replace function get_rowid
(l_rowid in varchar2)
return varchar2
is
ls_my_rowid varchar2(200);
rowid_type number;
object_number number;
relative_fno number;
block_number number;
row_number number;
begin
dbms_rowid.rowid_info(l_rowid,rowid_type,object_number,relative_fno, block_number, row_number);
ls_my_rowid := 'Object# is :'||to_char(object_number)||chr(10)||
'Relative_fno is :'||to_char(relative_fno)||chr(10)||
'Block number is :'||to_char(block_number)||chr(10)||
'Row number is :'||to_char(row_number);
return ls_my_rowid ;
end;
/
2.´úÂ빦ÄܲâÊÔ
[oracle@jumper tools]$ sqlplus scott/tiger
SQL*Plus: Release 9.2.0.4.0 - Production on Mon Nov 15 21:56:36 2004
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning option
JServer Release 9.2.0.4.0 - Production
SQL> @f_get_rowid
Function created.
SQL> select rowid from dept where deptno=10;
ROWID
------------------
AAABiPAABAAAFRSAAA
SQL> select get_rowid('AAABiPAABAAAFRSAAA') from dual;
GET_ROWID('AAABIPAABAAAFRSAAA')
------------------------------------------------------------------
Object# is :6287
Relative_fno is :1
Block number is :21586
Row number is :0
SQL> !
[oracle@jumper tools]$ ls
ct.sql ddlt.sql f_get_rowid.sql getevent.sql
3.ʹÓÃwrap¼ÓÃܼ°¼ÓÃܺóµÄ´úÂë
[oracle@jumper tools]$ wrap iname=f_get_rowid.sql oname=f_get_rowid.plb
PL/SQL Wrapper: Release 9.2.0.4.0- Production on Mon Nov 15 21:59:39 2004
Copyright (c) Oracle Corporation 1993, 2001. All Rights Reserved.
Processing f_get_ro
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SQL> create table tt2 as select * from employee;
Table created.
SQL> drop table tt2;
Table dropped.
SQL> select * from tt2;
select * from tt2
*
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> flashback table tt2 to before drop;
Flashback comp ......
http://tianzt.blog.51cto.com/459544/171759
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Redo Byte Address (RBA)
Recent entries in the redo thread of an Oracle instance are addressed using a 3-part redo byte address, or RBA. An RBA is comprised of
the log file sequence number (4 bytes)
the log file block number (4 bytes)
the byte offset into the block at which the redo record sta ......
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CREATE TABLESPACE data01
DATAFILE '/oracle/oradata/db/DATA01.dbf' SIZE 500M
UNIFORM SIZE 128k;
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CREATE UNDO TABLESPACE UNDOTBS02
DATAFILE '/oracle/oradata/db/UNDOTBS02.dbf' SIZE 50M
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