Question about SQL-based AWL

Hi, list!

I use SpamAssassin 3.2.2 and I configured it to use a MySQL-DB to manage the
Bayes and the AWL.

So, I created the table awl after the documentation, and I write all the data
in local.cf.
All runs perfectly!

Now the question: in the table awl I have a field username, but this is
always nobody.
I tought, it is the user that receive the E-Mails, but it doesn't seems so.

Can someone explain me, what does this field do?

Thanks a lot
Luca Bertoncello
(lucabert@lucabert.de)