sql:select count(*) cnt from m_staff
				INNER JOIN t_staff_work AS tsw
				ON tsw.t_staff_work_staff_id = m_staff.m_staff_id
				AND tsw.t_staff_work_flg = 1
				AND tsw.t_staff_work_id IS NOT NULL
				AND tsw.t_staff_work_date = CURRENT_DATE
				AND m_staff_wait > tsw.t_staff_work_starttime
				AND tsw.t_staff_work_endtime > now()
				AND tsw.t_staff_work_mall_id = 45390<Br>MySQL server has gone away