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 'and invisible=0' at line 1

select * from forum_post where pid=1511467 and tid= and invisible=0

PHP Debug

No.	File	Line	Code
1	zmfybaodao.php	27	discuz_database::query()
2	source/class/discuz/discuz_database.php	142	db_driver_mysqli->query()
3	source/class/db/db_driver_mysqli.php	148	db_driver_mysqli->halt()
4	source/class/db/db_driver_mysqli.php	223	break()