vsszan.com - Database Error

(1064) You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND medal_id >0 order by id desc' at line 1

select * from mag_user_medal_realtion WHERE user_id= AND medal_id >0 order by id desc

PHP Debug

No.	File	Line	Code
1	forum.php	67	require(%s)
2	source/module/forum/forum_viewthread.php	1014	include(%s)
3	data/template/5_diy_forum_viewthread.tpl.php	2904	get_uid_medal(%s)
4	extend/php/vzfunction.php	458	discuz_database::fetch_all(%s)
5	source/class/discuz/discuz_database.php	106	discuz_database::query(%s, Array, false, false)
6	source/class/discuz/discuz_database.php	142	db_driver_mysqli->query(%s, false, false)
7	source/class/db/db_driver_mysqli.php	149	db_driver_mysqli->halt(%s, %d, %s)
8	source/class/db/db_driver_mysqli.php	224	break()

Discuz! Database Error