Dedecms标签arclistsg调用单表模型出错的解决方法

else $gquery = "Select ch.addtable,listfields From `dede_arctype` tp left join `dede_channeltype` ch on ch.id=tp.channeltype where id='$typeid'";

else $gquery = "Select ch.addtable,listfields From `dede_arctype` tp left join `dede_channeltype` ch on ch.id=tp.channeltype where tp.id='$typeid'";