MySQL - 外键约束错误

Question

我在论坛上看到了这个问题的时间加载，但我似乎无法解决我的特定情况的问题。 我在一个简单的插入上收到以下错误。

Cannot add or update a child row: a foreign key constraint fails (`bag_track`.`job`, CONSTRAINT `fk_JOB_FLIGHT1` FOREIGN KEY (`FLIGHT_ID`) REFERENCES `FLIGHT` (`ID`) ON DELETE NO ACTION ON UPDATE NO ACTION) 

这里是我的表定义： 飞行表

CREATE TABLE IF NOT EXISTS `BAG_TRACK`.`FLIGHT` (
`ID` INT NOT NULL AUTO_INCREMENT , 
`FLIGHT_NUM` VARCHAR(15) NOT NULL , 
`ORIGIN` VARCHAR(45) NOT NULL , 
`ARRIVAL_TIME` DATETIME NOT NULL , 
`STATUS` VARCHAR(45) NOT NULL , 
`CAROUSEL_ID` INT NOT NULL , 
`GATE_ID` INT NOT NULL , 
`AIRCRAFT_TYPE_ID` INT NOT NULL , 
PRIMARY KEY (`ID`) , 
INDEX `fk_FLIGHT_CAROUSEL1` (`CAROUSEL_ID` ASC) , 
INDEX `fk_FLIGHT_GATE1` (`GATE_ID` ASC) , 
INDEX `fk_FLIGHT_AIRCRAFT_TYPE1` (`AIRCRAFT_TYPE_ID` ASC) , 
CONSTRAINT `fk_FLIGHT_CAROUSEL1` 
FOREIGN KEY (`CAROUSEL_ID`) 
REFERENCES `BAG_TRACK`.`CAROUSEL` (`ID`) 
ON DELETE NO ACTION 
ON UPDATE NO ACTION, 
CONSTRAINT `fk_FLIGHT_GATE1` 
FOREIGN KEY (`GATE_ID`) 
REFERENCES `BAG_TRACK`.`GATE` (`ID`) 
ON DELETE NO ACTION 
ON UPDATE NO ACTION, 
CONSTRAINT `fk_FLIGHT_AIRCRAFT_TYPE1` 
FOREIGN KEY (`AIRCRAFT_TYPE_ID`) 
REFERENCES `BAG_TRACK`.`AIRCRAFT_TYPE` (`ID`) 
ON DELETE NO ACTION 
ON UPDATE NO ACTION) 
ENGINE = MyISAM 
DEFAULT CHARACTER SET = utf8; 

工作表

CREATE TABLE IF NOT EXISTS `BAG_TRACK`.`JOB` (
    `ID` INT NOT NULL AUTO_INCREMENT , 
    `STATUS` VARCHAR(45) NOT NULL , 
    `LONGITUDE` FLOAT NULL , 
    `LATITUDE` FLOAT NULL , 
    `SPEED` VARCHAR(45) NULL , 
    `JOB_DATE` DATE NULL , 
    `START_TIME` TIME NULL , 
    `TOTAL_TIME` DOUBLE NULL , 
    `COMPLETION_DATE` DATE NULL , 
    `USER_ID` INT NOT NULL , 
    `ROUTE_ID` INT NOT NULL , 
    `FLIGHT_ID` INT NOT NULL , 
    PRIMARY KEY (`ID`, `FLIGHT_ID`) , 
    INDEX `fk_JOB_USER1` (`USER_ID` ASC) , 
    INDEX `fk_JOB_ROUTE1` (`ROUTE_ID` ASC) , 
    INDEX `fk_JOB_FLIGHT1` (`FLIGHT_ID` ASC) , 
    CONSTRAINT `fk_JOB_USER1` 
    FOREIGN KEY (`USER_ID`) 
    REFERENCES `BAG_TRACK`.`USER` (`ID`) 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION, 
    CONSTRAINT `fk_JOB_ROUTE1` 
    FOREIGN KEY (`ROUTE_ID`) 
    REFERENCES `BAG_TRACK`.`ROUTE` (`ID`) 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION, 
    CONSTRAINT `fk_JOB_FLIGHT1` 
    FOREIGN KEY (`FLIGHT_ID`) 
    REFERENCES `BAG_TRACK`.`FLIGHT` (`ID`) 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION) 
ENGINE = InnoDB; 

我想这个简单的插入

insert into job (status, USER_ID, ROUTE_ID, FLIGHT_ID) VALUES ('UNLOADING', 1, 1, 2) 

，并得到错误以上。 我在我的飞行表中有主键1的数据。 我已经检查过我的数据库中的所有错误等等，我不知道问题是什么，我很感激任何人都可以提供帮助。

感谢

乙

Answer 1

无论你的表格必须使用InnoDB引擎，你可以从official doc读取。

这两个表必须是InnoDB表，它们不能是TEMPORARY 表。

对于飞行表，您需要改为ENGINE = MyISAM。