Discuz! 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 '' at line 1
SELECT message FROM forum_post WHERE tid=

PHP Debug

No.FileLineCode
1index.php136require(%s)
2portal.php32require_once(%s)
3source/module/portal/portal_index.php32include_once(%s)
4data/template/4_diy_portal_index.tpl.php328include(%s)
5data/template/4_4_php_portal_list.tpl.php42discuz_database::query(%s)
6source/class/discuz/discuz_database.php142db_driver_mysql->query(%s, false, false)
7source/class/db/db_driver_mysql.php152db_driver_mysql->halt(%s, %d, %s)
8source/class/db/db_driver_mysql.php223break()
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