wiki.techinc.nl/maintenance/archives/patch-rename-user_groups-and_rights.sql

ALTER TABLE user_groups
	CHANGE user_id ug_user INT(5) UNSIGNED NOT NULL DEFAULT '0',
	CHANGE group_id ug_group INT(5) UNSIGNED NOT NULL DEFAULT '0';

ALTER TABLE user_rights
	CHANGE user_id ur_user INT(5) UNSIGNED NOT NULL,
	CHANGE user_rights ur_rights TINYBLOB NOT NULL DEFAULT '';