How to find the Last modified date and time of a package

Question

Hi,
We need a clarification on how to find the Last modified date and time of a package in Oracle. We used the example below to explain our scenario,
Lets consider the following example
Let A, B be two packages.
Package A calls the package B. So A is dependent on B.
When A is compiled the TIMESTAMP,LAST_DDL_TIME in USER_OBJECTS gets updated.
Now there a modification in package B so it is compiled. There is no modification in package A.
Now when the package A is executed the TIMESTAMP,LAST_DDL_TIME in USER_OBJECTS gets updated but we did not make any change in Package A. Now we need to find last modified date and time of the package A . So we can not rely on the TIMESTAMP,LAST_DDL_TIME in USER_OBJECTS . Can u please tell us any other solution to get last modified date and time of the package A .
Regards,
Vijayanand.C

Answer 1

Here is an example:
SQL> SELECT OBJECT_NAME,CREATED,LAST_DDL_TIME,TIMESTAMP,STATUS FROM USER_OBJECTS
2 WHERE OBJECT_NAME = ANY('A','B');
OBJECT_NAM CREATED LAST_DDL_TIME TIMESTAMP STATUS
A 20-MAY-2004 10:57:32 20-MAY-2004 10:57:32 2004-05-20:10:57:32 VALID
B 20-MAY-2004 10:58:22 20-MAY-2004 10:59:04 2004-05-20:10:59:04 VALID
SQL> CREATE OR REPLACE PROCEDURE A AS
2 BEGIN
3 NULL;
4 NULL;
5 END;
6 /
Procedure created.
SQL> SELECT OBJECT_NAME,CREATED,LAST_DDL_TIME,TIMESTAMP,STATUS FROM USER_OBJECTS
2 WHERE OBJECT_NAME = ANY('A','B');
OBJECT_NAM CREATED LAST_DDL_TIME TIMESTAMP STATUS
A 20-MAY-2004 10:57:32 20-MAY-2004 11:01:28 2004-05-20:11:01:28 VALID
B 20-MAY-2004 10:58:22 20-MAY-2004 10:59:04 2004-05-20:10:59:04 INVALID
SQL> EXEC B
PL/SQL procedure successfully completed.
SQL> SELECT OBJECT_NAME,CREATED,LAST_DDL_TIME,TIMESTAMP,STATUS FROM USER_OBJECTS
2 WHERE OBJECT_NAME = ANY('A','B');
OBJECT_NAM CREATED LAST_DDL_TIME TIMESTAMP STATUS
A 20-MAY-2004 10:57:32 20-MAY-2004 11:01:28 2004-05-20:11:01:28 VALID
B 20-MAY-2004 10:58:22 20-MAY-2004 11:01:53 2004-05-20:11:01:53 VALID
Note that the date under the column 'created' only changes when you really create or replace the procedure.
Hence you can use the column 'created' of 'user_objects'.