在用ssh做删除客户的同时删除联系人的时候会遇见这种异常： HTTP Status 500 - could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute

在hibernate 删除关联时会出现eleted object would be re-saved by cascade (remove deleted object from associations)的异常，结合别人的和自己的经验通常有三种解决的方案： 方法1 删除Set方的cascade： 方法2 解决关联关系后，再删除 onside.getManys().remove(this

点位连成线 select st_makeline(t.the_geom)from (select the_geomfrom pointswhere name = 'xxx'and point_time > '2023-09-01'and point_time < '2023-09-03'order by point_time