ERD (with relationships) for MySQL databases for versions 3.8.8 and 4.0.5 of RT?

Hello folks.
Does anybody have an ERD (with relationships) for the databases for version 3.8.8 and 4.0.5 of RT? I tried to create one with MySQL Workbench but all I can get is primary keys, are there any foreign keys or are the relationships defined anywhere? If it includes Asset Tracker, that would be a bonus!
Thanks in advance!
-Jeff

Hello folks.
Does anybody have an ERD (with relationships) for the databases for
version 3.8.8 and 4.0.5 of RT? I tried to create one with MySQL
Workbench but all I can get is primary keys, are there any foreign keys
or are the relationships defined anywhere? If it includes Asset
Tracker, that would be a bonus!

FK relationships aren’t enforced at the database level.

Refer to http://requesttracker.wikia.com/wiki/DBSchema for a start.
There is a relationship diagram that ships with RT, which is rendered on
the wiki.