'primary key' => array('id'),
'unique keys' => array(
'user_group_uri_key' => array('uri'),
+// when it's safe and everyone's run upgrade.php 'user_profile_id_key' => array('profile_id'),
),
'foreign keys' => array(
'user_group_id_fkey' => array('profile', array('profile_id' => 'id')),