hql語句：dao.executeHql("delete Student As s where s.course.teacher.tno"=tno);錯(cuò)誤信息：返回sql語句：delete from Per_Student cross join Per_COURSE course1_ where tno=12000002WARN: 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 'cross join Per_COURSE course1_ where tno=12000002' at line 1student關(guān)聯(lián)course，course關(guān)聯(lián)teacher，我很好奇怎么delete時(shí)沒有關(guān)聯(lián)到teacher呢，這條hql語句應(yīng)該是沒有問題的吧？