Subject System tables affected by DML operations over regular tables
Author sosingus

I sent an identical message from an mail-client but have had no response if it had reached the group. As I am not so familiar in using newsgroups, I am trying to sent it via web just as well.

However, here I see a message must be approved by the group owner, that might be the issue of my message not appearing, anyway please forgive me if you receive it twice.

Here comes the question:

What are the system tables, if any, that get affected by DML operations
over regular tables?

I would like to implement some global functionality to my database by
adding a trigger to that table or tables.

Thanks in advance!
Sofija Blazevski