Question

我缺乏构建存储过程的经验，并且遇到了这个错误，我无法理解背后的原因：

[2015-09-29 01:01:55] [22001] [1292]数据截断：截断错误的DOUBLE值：＆＃39; 5609d3e6c89be＆＃39;

价值＆＃39; 5609d3e6c89be＆＃39;是＆＃34; FlightID＆＃34;。

我的存储过程代码：

DROP PROCEDURE IF EXISTS initFlight;
CREATE PROCEDURE initFlight (flightid VARCHAR(50))
 BEGIN

  -- rules, player should only fly if not in jail, not in missions
  -- and is in the city the flight will take off from
  DECLARE fname VARCHAR(50); -- flight name
  DECLARE depart int; -- city number of departure
  DECLARE dest int; -- city number of destination

   -- assign values to our variables
  select flightname, source_airport, destination_airport
  into fname, depart, dest
  from airport_flights where id = flightID;

  -- show in console the variable values for debugging
  -- select concat(" fname: ", fname, " depart: ", depart, " dest: ", dest);

  -- set players flying means p.live = '-1'
  update `[players]` as p set p.live = '-1' where p.id in (
    select id from airport_tickets where flight = flightID
  ) and p.live = depart;

   -- insert into alerts a message for players boarding the flight (are in the city of departure)
  insert into player_alerts (alert_text, player_id)
    select concat("Boarding flight ", fname) as alert_text, p.id as player_id from `[players]` as p
    where p.id in (
      select id from airport_tickets where flight = flightID
    ) and p.live = depart;

   -- insert into alerts a message for players that missed the flight (are not in the city of departure)
  insert into player_alerts (alert_text, player_id)
    select concat("You missed flight ", fname) as alert_text, id as player_id from `[players]` as p
    where p.id in (
      select id from airport_tickets where flight = flightID
    ) and p.live != depart;

   -- stop sales
   update airport_flights set selling_tickets = 0 where id = flightID;

END;
call initFlight('5609d3da016bf');

这里发生了什么？为什么我的＆＃34;字符串＆＃34;被翻译成双重然后被截断？

airport_flights.id is varchar(50)
airport_flights.source_airport is int(11)
airport_flights.destination_airport is int(11)

airport_tickets.id is varchar(50)
airport_tickets.flight is varchar(50)
airport_tickets.owner_id is int(11)


`[players]`.id is int(11)
`[players]`.live is int(11)
`[players]`.name is varchar(200)

player_alerts.id is int(11)
player_alerts.alert_text is varchar(250)

PS：如果您需要更多信息，请告诉我，批评一如既往欢迎

Answer 1

经过多次头撞后，我发现问题出现在子查询中，当我想将airport_tickets.owner_id与玩家匹配时，我将airport_tickets.id（varchar）与player.id（int）混合在一起。 ID。

我只是在删除所有内容并将其全部重新编写时才发现这一点，以此来消除任何代码失明（当您的大脑读取它认为代码执行的内容而不是实际编写的内容时）。

存储过程：数据截断：截断不正确的DOUBLE值

1 个答案: