oracle如何恢復被覆蓋的存儲過程

2020-07-26 14:20:32

字體：大中小

來源：轉載

供稿：網友

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據字典，修改數據字典跟修改普通表的數據沒有區別，此時會把修改前的內容放到undo中，我們可以根據這一點來進行閃回，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

復制代碼代碼如下:

 
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

復制代碼代碼如下:

drop procedure GG_TEST;

3.登錄到sys賬戶下

復制代碼代碼如下:

 
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; 