oracle如何恢復(fù)被覆蓋的存儲過程

    如果你不小心覆蓋了之前的存儲過程，那得趕緊閃回，時長越長閃回的可能性越小，下面為大家介紹下恢復(fù)原理
    如果你不小心覆蓋了之前的存儲過程，那得趕緊閃回，時長越長閃回的可能性越小。原理很簡單，存儲過程的定義就是數(shù)據(jù)字典，修改數(shù)據(jù)字典跟修改普通表的數(shù)據(jù)沒有區(qū)別，此時會把修改前的內(nèi)容放到undo中，我們可以根據(jù)這一點來進(jìn)行閃回，所以我說要盡快，要不然找不回來了。下面我們來做一個實驗：
    1.在用戶TEST下14:31下建立存儲過程
    代碼如下:
    create or replace procedure GG_TEST
    as l_cnt number;
    begin
    for i in 1 .. 10000
    loop
    execute immediate 'select count(*) from t where x = ' || i into l_cnt;
    end loop;
    end;
    2.在用戶TEST下在14:33下刪除存儲過程
    代碼如下:
    drop procedure GG_TEST;
    3.登錄到sys賬戶下
    代碼如下:
    create table p_temp as
    select *
    from dba_source as of timestamp TO_TIMESTAMP('2014-05-04 14:33:00', 'YYYY-MM-DD HH24:MI:SS')
    where TYPE = 'PROCEDURE'
    And owner = 'TEST'
    And Name = 'GG_TEST';
    select text
    from p_temp
    where name like upper('%GG_TEST%')
    and owner = 'TEST'
    order by line;
    TEXT
    ---------------------------------------------------------------------------
    procedure GG_TEST
    as l_cnt number;
    begin
    for i in 1 .. 10000
    loop
    execute immediate 'select count(*) from t where x = ' || i into l_cnt;
    end loop;
    end;