select * from canyin.cxt_dishesinfor where dingtime IS NOT NULL and cxt_state < 1
and date(inputtime) = current_date and dingtime < (current_timestamp - interval ''60 minutes'') ;
is not null 字段不为空
date(inputtime) = current_date 日期=今天
dingtime < (current_timestamp - interval ''60 minutes'') 预定时间一小时前的