SELECT t.id_topic, t.id_board, t.id_last_msg, IFNULL(lmr.id_msg, 0) AS id_msg' . (!in_array($_REQUEST['sort'], array('t.id_last_msg', 't.id_topic')) ? ', ' . $_REQUEST['sort'] . ' AS sort_key' : '') . '

 				FROM {db_prefix}messages AS m

 					INNER JOIN {db_prefix}topics AS t ON (t.id_topic = m.id_topic)

 					LEFT JOIN {db_prefix}log_mark_read AS lmr ON (lmr.id_board = t.id_board AND lmr.id_member = {int:current_member})' . (isset($sortKey_joins[$_REQUEST['sort']]) ? $sortKey_joins[$_REQUEST['sort']] : '') . '

 				WHERE m.id_member = {int:current_member}' . (!empty($board) ? '

 					AND t.id_board = {int:current_board}' : '') . ($modSettings['postmod_active'] ? '