SQL Error : 2013 Lost connection to MySQL server during query
SELECT aa.forum_id, u.user_id, u.username
FROM phpbb_auth_access aa, phpbb_user_group ug, phpbb_groups g, phpbb_users u
WHERE aa.auth_mod = 1
AND g.group_single_user = 1
AND ug.group_id = aa.group_id
AND g.group_id = aa.group_id
AND u.user_id = ug.user_id
GROUP BY u.user_id, u.username, aa.forum_id
ORDER BY aa.forum_id, u.user_id