Auth against LDAP - Roles/Affiliation from Database

[Grunge]

Hi

I'm working for a school and we are planning to use shibboleth to 
replace our own auth-system.
Currently I have no knowledge about shibboleth and hope you can give me 
some hand.

Auth:
Authentication against a LDAP -> no problem here.

Affiliation/Roles or whatever they are called:
Currently we have "tags" to manage rights, including a software to 
manage the tags.
--> Is there a way I can integrate the tags from the Postgresql DB?


query would look like this
SELECT tag FROM tags WHERE username=?

and return something like this:
"usertype.teacher"
"my.absences.users"
"courses.bi"
"faculty.bi"
"faculty.np"
"faculty.gg"
"my.password.editors"
"my.download.users"
"my.timetable.users"
"courses.gg"
"my.login"
"my.rr2.users"
"my.lists.users"

Any help is appreciated.
Thank you very much and have a nice Weekend
Philipp