mysql触发器的一个示例方法

begin

if new.open_state = 0 then

set @switch_status = 1;

else

set @switch_status = 2;

end if;

update parking_carlock set voltage = new.voltage , switch_status = @switch_status, run_status= new.equi_state , car_status=new.car_state  where slave_id = new.slave_id;

end