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 * FROM xj_eventthread WHERE tid=

PHP Debug

No.FileLineCode
1forum.php67require(%s)
2source/module/forum/forum_forumdisplay.php974include(%s)
3data/template/4_diy_forum_forumdisplay_44.tpl.php1hookscriptoutput(%s)
4source/function/function_core.php1221hookscript(%s, %s, %s, Array)
5source/function/function_core.php1180call_user_func(Array, Array)
6plugin_xj_event->forumdisplay_thread_subject_output(Array)
7source/plugin/xj_event/main.class.php51discuz_database::fetch_first(%s)
8source/class/discuz/discuz_database.php94discuz_database::query(%s, Array, false, false)
9source/class/discuz/discuz_database.php142db_driver_mysql->query(%s, false, false)
10source/class/db/db_driver_mysql.php152db_driver_mysql->halt(%s, %d, %s)
11source/class/db/db_driver_mysql.php223break()
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