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 '3978 and tid=41421' at line 2
SELECT count(*) FROM forum_post where authorid=1 3978 and tid=41421

PHP Debug

No.FileLineCode
1portal.php27runhooks()
2source/function/function_core.php1118hookscript(%s, %s, %s, Array, %s)
3source/function/function_core.php1167plugin_cznnw_seoyh->common(Array)
4source/plugin/cznnw_seoyh/SEO_Optimization.class.php153discuz_database::result_first(%s)
5source/class/discuz/discuz_database.php117discuz_database::query(%s, Array, false, false)
6source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
7source/class/db/db_driver_mysql.php153db_driver_mysql->halt(%s, %d, %s)
8source/class/db/db_driver_mysql.php224break()
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