I need to create a trigger which tracks user password changes into a table my_table. I have a database user who has alter user privileges and would like him to change users who belong to his group. That is, when the user changes the password for a user, the trigger fires and inserts info into my_table. In case this user tries to change another user's password, the trigger should fire again telling him 'cannot alter the user.'
I'm enclosing the trigger code I wrote:
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create or replace trigger LOGG_TRAIL
before alter on database
when (ora_dict_obj_type = 'USER' and
ora_dict_obj_name != user
and sys_context('USERENV','ISDBA') = 'FALSE' );
select to.PROFILE into vprofile
from DBA_USERS by, DBA_USERS to
where by.USERNAME = user
and to.USER_NAME = ora_dict_obj_name
and by.PROFILE = to.PROFILE;
insert into TRAIL_TEMP (USER_ALTERED, PASSWORD_MODIFIED_BY,
values (ora_dict_obj_name, user, sysdate, vprofile); exception
when others then
raise_application_error (-20001,'can''t alter user'); end; /
This gives errors. Can you please check it? Your help will be highly appreciated.
If I had to perform this action, I would take a slightly different route. Each user is assigned a profile and that profile can include a password verification function. There is nothing stopping you from coding your rules in that password verification function. This function can insert rows of data into another table and raise exceptions.