无法添加或更新子行：即使我已经在父表上添加了行，外键约束也会失败

编程问答 2022-04-21

问题描述

我正在尝试向子表 (transaction_tb) 添加一条记录，并且我使用的外键值确实存在于父表的主键中。但是为什么它仍然返回我上面提到的这个错误？

CREATE TABLE custinfo_tb(
    transactionID bigint NOT NULL,Col_ID int(8) NOT NULL,email varchar(50) NOT NULL,contact int(11) NOT NULL,address varchar(100) NOT NULL,tdcp varchar(100) NOT NULL,pc varchar(4) NOT NULL,PRIMARY KEY (Col_ID,transactionID)
    
  
)ENGINE=InnoDB DEFAULT CHARSET=latin1;


CREATE TABLE brokerinfo_tb
(
 transactionID bigint NOT NULL,brokerid varchar(30) NOT NULL,broker_contact int(15) NOT NULL,Account_wbroker varchar(100) NOT NULL,PRIMARY KEY (brokerid,transactionID)
)ENGINE=InnoDB DEFAULT CHARSET=latin1;


CREATE TABLE stockinfo_tb
(
    transactionID bigint NOT NULL,Stock_Code varchar(6) NOT NULL,Stock_Name varchar(50) NOT NULL,Stock_Amount int(9) NOT NULL,Avecost float NOT NULL,Cert_amount float NOT NULL,PRIMARY KEY (stock_code,transactionID)
    
)ENGINE=InnoDB DEFAULT CHARSET=latin1;


CREATE TABLE transactiontype_tb
(
  transactionID bigint NOT NULL,Transfertype varchar(20) NOT NULL,transferdesc varchar(20) NOT NULL,transperiod varchar(10) NOT NULL,transfee varchar(30) NOT NULL,PRIMARY KEY (transfertype,transactionID)
    
)ENGINE=InnoDB DEFAULT CHARSET=latin1;


CREATE TABLE transaction_tb(
    transactionID bigint  NOT NULL AUTO_INCREMENT,COL_ID int NOT NULL,sysdate DATE,PRIMARY KEY (transactionID),FOREIGN KEY (Col_ID,transactionID) REFERENCES custinfo_tb(Col_ID,transactionID)  ON DELETE CASCADE ON UPDATE CASCADE,FOREIGN KEY (brokerid,transactionID) REFERENCES brokerinfo_tb(brokerid,FOREIGN KEY (Stock_Code,transactionID) REFERENCES stockinfo_tb(Stock_Code,FOREIGN KEY (Transfertype,transactionID) REFERENCES transactiontype_tb(Transfertype,transactionID)  ON DELETE CASCADE ON UPDATE CASCADE
    
)ENGINE=InnoDB DEFAULT CHARSET=latin1;

我输入的数据是：

INSERT INTO brokerinfo_tb (transactionID,brokerid)
VALUES (1,1);

INSERT INTO custinfo_tb (transactionID,Col_ID)
VALUES (1,20180111);

INSERT INTO stockinfo_tb (transactionID,Stock_Code)
VALUES (1,'AR');

INSERT INTO transactiontype_tb (transactionID,Transfertype)
VALUES (1,'TRANSFER_IN');

-- THis is where it Failed
INSERT INTO transaction_tb (transactionID,brokerid,COL_ID,Stock_Code,1,201808111,'AR','TRANSFER_IN');

出了什么问题？我尝试在我的 transaction_tb 表中添加一行，其中已经存在来自四个表（custinfo_tb、brokerinfo_tb、stockinfo_tb 和 transactiontype_tb）的匹配行

解决方法

您的 custinfo_tb.Col_ID 包含 20180111。

您尝试插入 transaction_tb.COL_ID 值 201808111。

比较这两个值：

20180111
201808111
databasedatabasedatabaseforeign-keysmysql