如何恢复一个被误drop的存储过程

这种恢复是非常容易的，原理就是利用了oracle里所有的存储过程的源代码都是存在dba_source里，而drop某个存储过程的时候，oracle

今天有同事给我写信："我大概10分钟前错误地drop掉了一个存储过程：P_IPACCHECK_NC，而这个存储过程的源码我本机又没有备份，麻烦您恢复一下，，谢谢" 

如下是完整的恢复过程：

用sys用户登陆，执行如下的查询：

SQL> select text from dba_source as of timestamp to_timestamp('2009-03-06 09:45:00', 'YYYY-MM-DD HH24:MI:SS') where owner='IPRA' and name= 'P_IPACCHECK_NC' order by line;

TEXT

--------------------------------------------------------------------------------

procedure P_IPACCHECK_NC(n_flag     out number,

                                           vc_message out varchar2) is

  ------------------------------------------------------------------------------

  --    PROCEDURE NAME      : P_IPACCHECK_NC                       --

  --    NAME IN SYSMTH      : NONE                                --

  --    DESCRIPTION         : 对IWBIBT记录进行有效性检查，没有错误的数据置标志为

  --

  --       INVOKED          :                                     --

  --    PROGRAMMED BY       : ZhouXin         DATE  2008/12/02    --

  --     MODIFIED BY        :

  --         TYPE           : ONLINE                              --

  --                   COPYRIGHT 1997~2008 ACCA-ARK               --

  --                                                              --

  ------------------------------------------------------------------------------

  vc_ipastc  varchar2(20);

  n_errcount number := 0;

begin

  for rec_pac in (select * from iwbpac where ipastc is null) loop

TEXT

--------------------------------------------------------------------------------

    n_errcount := 0;

    vc_ipastc  := rec_pac.ipastc;

    --检查清算月

    if rec_pac.ipalrm > to_number(to_char(sysdate, 'YYYYMM')) then

      vc_ipastc  := vc_ipastc || 'A';

      n_errcount := n_errcount + 1;

    end if;

    --检查名义开账公司

    if f_masaln_existawbprefix(rec_pac.ipaarr) != true then

      vc_ipastc  := vc_ipastc || 'B';

      n_errcount := n_errcount + 1;

    end if;

    --检查实际开账公司

    if f_masaln_existawbprefix(rec_pac.ipacar) != true then

      vc_ipastc  := vc_ipastc || 'C';

      n_errcount := n_errcount + 1;

    end if;

    --检查开账公司

    if f_masaln_existawbprefix(rec_pac.ipairl) != true then

      vc_ipastc  := vc_ipastc || 'E';

      n_errcount := n_errcount + 1;

TEXT

--------------------------------------------------------------------------------

    end if;

    --检查名义开账公司

    if rec_pac.ipalas 'P' then

      vc_ipastc  := vc_ipastc || 'F';

      n_errcount := n_errcount + 1;

    end if;

    --检查帐单录入日期

    if rec_pac.ipanpd > to_number(to_char(sysdate, 'YYYYMMDD')) then

      vc_ipastc  := vc_ipastc || 'G';

      n_errcount := n_errcount + 1;

    end if;

    --检查开账月

    if rec_pac.ipailm > to_number(to_char(sysdate, 'YYYYMM')) then

      vc_ipastc  := vc_ipastc || 'H';

      n_errcount := n_errcount + 1;

    end if;

    --检查原始开账金额

    if rec_pac.ipaemk = 'B' and rec_pac.ipaamt is null then

      vc_ipastc  := vc_ipastc || 'I';

      n_errcount := n_errcount + 1;

    end if;

TEXT

--------------------------------------------------------------------------------

    --检查清算期

    if to_number(rec_pac.ipacpr) 4 then

      vc_ipastc  := vc_ipastc || 'J';

      n_errcount := n_errcount + 1;

    end if;

    --检查开账期

    if to_number(rec_pac.ipabpr) 4 then

      vc_ipastc  := vc_ipastc || 'K';

      n_errcount := n_errcount + 1;

    end if;

    --没有错误，置标志位'0'

    if n_errcount = 0 then

      update iwbpac

         set ipastc = '0'

       where ipacpr = rec_pac.ipacpr

         and ipairl = rec_pac.ipairl

         and ipacar = rec_pac.ipacar

         and ipanvn = rec_pac.ipanvn

         and ipanva = rec_pac.ipanva

         and ipalrm = rec_pac.ipalrm;

    else

TEXT

--------------------------------------------------------------------------------

      update iwbpac

         set ipastc = vc_ipastc

       where ipacpr = rec_pac.ipacpr

         and ipairl = rec_pac.ipairl

         and ipacar = rec_pac.ipacar

         and ipanvn = rec_pac.ipanvn

         and ipanva = rec_pac.ipanva

         and ipalrm = rec_pac.ipalrm;

    end if;

  end loop;

exception

  when others then

    n_flag     := 0;

    vc_message := substr(sqlerrm, 1, 1000);

end P_IPACCHECK_NC;

100 rows selected

补充：

sys@ORCL> select text from dba_source where owner='LSF' and order by line;

TEXT
-----------------------------------------------------------------------------------------------------------------------------------
procedure emp_sal
is
v_last_name employee.last_name%type;
v_employee_id employee.employee_id%type;
v_salary employee.salary%type;
cursor cursor_sal is
select last_name,employee_id,salary from employee where salary between 2000 and 3000;
begin
open cursor_sal;
loop
fetch cursor_sal into v_last_name,v_employee_id,v_salary;
exit when cursor_sal%notfound;
update employee set salary=salary*1.2 where last_name=v_last_name and employee_id=v_employee_id;
end loop;
close cursor_sal;
commit;
end;

17 rows selected.

SQL> show user
USER is "LSF"
SQL> select username from user_users;

USERNAME
------------------------------
LSF

SQL> select text from user_source where order by line;

TEXT
--------------------------------------------------------------------------------
procedure emp_sal
is
v_last_name employee.last_name%type;
v_employee_id employee.employee_id%type;
v_salary employee.salary%type;
cursor cursor_sal is
select last_name,employee_id,salary from employee where salary between 2000 and
3000;

begin
open cursor_sal;
loop
fetch cursor_sal into v_last_name,v_employee_id,v_salary;
exit when cursor_sal%notfound;
update employee set salary=salary*1.2 where last_name=v_last_name and employee_i
d=v_employee_id;

end loop;
close cursor_sal;
commit;
end;

17 rows selected.

SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;

TO_CHAR(SYSDATE,'YY
-------------------
2011-08-10 14:46:24

SQL> drop procedure emp_sal;

Procedure dropped.

SQL> select text from user_source where order by line;

no rows selected

SQL> select text from user_source as of timestamp to_timestamp('2011-08-10 14:46:24','YYYY-MM-DD HH24:MI:SS') where order by line;
select text from user_source as of timestamp to_timestamp('2011-08-10 14:46:24','YYYY-MM-DD HH24:MI:SS') where order by line
                 *
ERROR at line 1:
ORA-01031: insufficient privileges

sys@ORCL> select text from  dba_source as of timestamp to_timestamp('2011-08-10 14:46:24','YYYY-MM-DD HH24:MI:SS') where owner='LSF' and order by line;

TEXT
-----------------------------------------------------------
procedure emp_sal
is
v_last_name employee.last_name%type;
v_employee_id employee.employee_id%type;
v_salary employee.salary%type;
cursor cursor_sal is
select last_name,employee_id,salary from employee where salary between 2000 and 3000;
begin
open cursor_sal;
loop
fetch cursor_sal into v_last_name,v_employee_id,v_salary;
exit when cursor_sal%notfound;
update employee set salary=salary*1.2 where last_name=v_last_name and employee_id=v_employee_id;
end loop;
close cursor_sal;
commit;
end;

17 rows selected.