Getting the Previous copy of a Procedure

Question

Hi Oracle Techie's,
I am using Oracle 10G Enterprise edition.
Is there a way that oracle keeps the earlier version of Procedures and we can get the older version of it?
Accidentally I and my colleague worked with the same procedure, in which he overwritten my changes with his copy of changes. It happened yesterday. Is there a chance to get back the older version of that object?
We used TOAD as our editor. I know I have done a mistake without taking the backup yesterday. Please help me out, if there is a chance to get back the object?
Thanks,
Ram

Answer 1

A test run
(will work with 9i and higher)
PRAZY@11gR1> SELECT SYSTIMESTAMP FROM DUAL;
SYSTIMESTAMP
04-MAR-10 12.24.44.228000 PM +05:30
Elapsed: 00:00:00.00
PRAZY@11gR1> create or replace procedure testproc as
  2  begin
  3  dbms_output.put_line('test1');
  4  end;
  5  /
Procedure created.
Elapsed: 00:00:00.03
PRAZY@11gR1> SELECT SYSTIMESTAMP FROM DUAL;
SYSTIMESTAMP
04-MAR-10 12.25.05.962000 PM +05:30
Elapsed: 00:00:00.00
PRAZY@11gR1> ed
Wrote file afiedt.buf
  1  create or replace procedure testproc as
  2  begin
  3  dbms_output.put_line('test2');
  4* end;
PRAZY@11gR1> /
Procedure created.
Elapsed: 00:00:00.00
PRAZY@11gR1>Connect as Sysdba
SYS@11gR1> select text from dba_source
  2       as of timestamp systimestamp
  3       where name='TESTPROC' order by line;
TEXT
procedure testproc as
begin
dbms_output.put_line('test2');
end;
Elapsed: 00:00:00.03
SYS@11gR1> select text from dba_source
  2       as of timestamp systimestamp - interval '1' minute
  3       where name='TESTPROC' order by line;
TEXT
procedure testproc as
begin
dbms_output.put_line('test1');
end;
Elapsed: 00:00:00.03
SYS@11gR1>Regards,
Prazy
Edited by: PrazY on Mar 4, 2010 12:40 PM
Added version list.