2 same tables in sql_build_query

$sql_array = array (

	'SELECT' => ' a.id, a.game_id, a.title, a.points, a.description, a.icon, a.factionid,

		r1.rel_value as criteria_id,

		r2.rel_value as rewards_item_id,

		c.description as criteria, c.orderindex as criteriaorder, c.max as criteriamax,

		w.description as rewards, w.orderindex as rewardorder, w.max as rewardmax',

	'FROM' => array (

		ACHIEVEMENT_TABLE => 'a',

		BB_RELATIONS_TABLE => 'r1',

		BB_RELATIONS_TABLE => 'r2',

		ACHIEVEMENT_CRITERIA_TABLE => 'c',

		ACHIEVEMENT_REWARDS_TABLE => 'w',

		),

	'WHERE' =>  'a.id = ' . (int) $this->id .

		" AND a.game_id = '". $this->game_id .

		"' AND r1.attribute_id = 'ACH' AND r1.rel_attr_id = 'CRI' AND r1.att_value = a.id   " .

		" AND r2.attribute_id = 'ACH' AND r2.rel_attr_id = 'REW' AND r2.att_value = a.id " .

		" AND c.criteria_id = r1.rel_value " .

		" AND c.rewards_item_id = r2.rel_value "

);

$sql = $db->sql_build_query('SELECT', $sql_array);

SELECT a.id,

       a.game_id,

       a.title,

       a.points,

       a.description,

       a.icon,

       a.factionid,

       r1.rel_value  AS criteria_id,

       r2.rel_value  AS rewards_item_id,

       c.description AS criteria,

       c.orderindex  AS criteriaorder,

       c.max         AS criteriamax,

       w.description AS rewards,

       w.orderindex  AS rewardorder,

       w.max         AS rewardmax

FROM   (phpbb_bb_achievement a

        CROSS JOIN phpbb_bb_relations_table r2

        CROSS JOIN phpbb_bb_achievement_criteria c

        CROSS JOIN phpbb_bb_achievement_rewards w)

WHERE  a.id = 4860

   AND a.game_id = 'wow'

   AND r1.attribute_id = 'ACH'

   AND r1.rel_attr_id = 'CRI'

   AND r1.att_value = a.id

   AND r2.attribute_id = 'ACH'

   AND r2.rel_attr_id = 'REW'

   AND r2.att_value = a.id

   AND c.criteria_id = r1.rel_value

   AND c.rewards_item_id = r2.rel_value