How to get user/creation date of Trigger in Oracle - sql

Question

Is there any way to get the creation date(time) of the trigger ?
I tried the following query:
select CREATED from user_objects where object_name = '&MY_TRIGGER_NAME'
but i think, i get the last modification/run date, not the creation time.
And also, i want to get the user who created the trigger...if it is possible.

Answer 1

As per the oracle documentation, fields of the USER_OBJECTS is described as:
CREATED: Timestamp for the creation of the object
LAST_DDL_TIME: Timestamp for the last modification of the object resulting from a DDL statement (including grants and revokes)
Let's do one exercise:
Checking in the USER_OBJECTS table for trigger TRG_T
SQL> SELECT OBJECT_NAME,
2 OBJECT_TYPE,
3 CREATED,
4 LAST_DDL_TIME
5 FROM USER_OBJECTS
6 WHERE OBJECT_NAME = 'TRG_T';
no rows selected
Now, Let's create the trigger TRG_T
SQL> CREATE OR REPLACE TRIGGER TRG_T BEFORE
2 INSERT ON T
3 FOR EACH ROW
4 BEGIN
5 NULL;
6 END;
7 /
Trigger created.
Let's check in the USER_OBJECTS
SQL> SELECT OBJECT_NAME,
2 OBJECT_TYPE,
3 CREATED,
4 LAST_DDL_TIME
5 FROM USER_OBJECTS
6 WHERE OBJECT_NAME = 'TRG_T';
OBJECT_NAME OBJECT_TYPE CREATED LAST_DDL_TIME
--------------- --------------- -------------------- --------------------
TRG_T TRIGGER 02-jul-2020 12:41:29 02-jul-2020 12:41:29
Currently, CREATED and LAST_DDL_TIME are the same because the last DDL operation on the trigger is when we created it.
Let's modify the trigger:
SQL> CREATE OR REPLACE TRIGGER TRG_T BEFORE
2 INSERT ON T
3 FOR EACH ROW
4 BEGIN
5 NULL; -- do some changes
6 NULL; -- CHANGED THIS
7 END;
8 /
Trigger created.
Now, let's again check in the USER_OBJECTS:
SQL> SELECT OBJECT_NAME,
2 OBJECT_TYPE,
3 CREATED,
4 LAST_DDL_TIME
5 FROM USER_OBJECTS
6 WHERE OBJECT_NAME = 'TRG_T';
OBJECT_NAME OBJECT_TYPE CREATED LAST_DDL_TIME
--------------- --------------- -------------------- --------------------
TRG_T TRIGGER 02-jul-2020 12:41:29 02-jul-2020 12:42:05
See the CREATED and LAST_DDL_TIME is different here

Answer 2

CREATED is the
timestamp for the creation of the object
in USER_OBJECTS/ALL_OBJECTS/DBA_OBJECTS and not the last modified date which isLAST_DDL_TIME.
To get trigger owner, you need to use OWNER column in ALL_TRIGGERS/DBA_TRIGGERS because USER_TRIGGERS displays only your own triggers without any OWNER column.

Answer 3

there is a field called "created" in user_objects view which tells the creation time of the object. There is another column called last_ddl_time which would show the time of the last creation of the DDL
As for the user who created the object i am not sure its tracked unless you have got a logon trigger that logs this information i believe