Olá, execute essas sqls na sua database.
DROP PROCEDURE IF EXISTS `getroomitems`;
DELIMITER ;;
CREATE DEFINER=`root`@`localhost` PROCEDURE `getroomitems`(IN `roomid` INT(10) UNSIGNED)
BEGIN
SELECT items_rooms.item_id, items_rooms.x, items_rooms.y, items_rooms.n, items.base_id, items_extradata.data, items.rareid, items.group_data, items.placedBy
FROM items_rooms
JOIN items ON (items.item_id = items_rooms.item_id)
LEFT JOIN items_extradata ON (items_extradata.item_id = items.item_id)
WHERE items_rooms.room_id = roomid;
END
;;
DELIMITER ;
-- ----------------------------
-- Procedure structure for `getuseritems`
-- ----------------------------
DROP PROCEDURE IF EXISTS `getuseritems`;
DELIMITER ;;
CREATE DEFINER=`root`@`localhost` PROCEDURE `getuseritems`(IN userid int(10) unsigned)
BEGIN
SELECT items_users.item_id, items.base_id, items_extradata.data, items.rareid, items.group_data
FROM items_users
JOIN items ON (items.item_id = items_users.item_id)
LEFT JOIN items_extradata ON (items_extradata.item_id = items.item_id)
WHERE items_users.user_id = userid;
END
;;
DELIMITER ;
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Espero ter ajudado, até.