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 count(*) FROM keke_down a,keke_down_form_item b WHERE a.id=b.fileid AND a.state=3 AND a.cate=3 AND a.subcate=18 AND b.f7=

PHP Debug

No.FileLineCode
1plugin.php47include(%s)
2source/plugin/keke_down/keke_down.inc.php245getList()
3source/plugin/keke_down/function.php1054table_keke_down->count_all_by_form()
4source/plugin/keke_down/table/table_keke_down.php80discuz_database::result_first()
5source/class/discuz/discuz_database.php123discuz_database::query()
6source/class/discuz/discuz_database.php142db_driver_mysqli->query()
7source/class/db/db_driver_mysqli.php148db_driver_mysqli->halt()
8source/class/db/db_driver_mysqli.php223break()
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