我有一个具有以下架构的数据库:

以下 SQL 创建相关表:

-- -----------------------------------------------------
-- Table `ninikske_bioldb`.`CodingRegion`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `ninikske_bioldb`.`CodingRegion` (
  `CodRegID` VARCHAR(45) NOT NULL ,
      `CD_Start` INT NOT NULL ,
  `CD_Stop` INT NOT NULL ,
  `ORFs_ORF_ID` VARCHAR(45) NOT NULL ,
  PRIMARY KEY (`ORFs_ORF_ID`, `CodRegID`) ,
  INDEX `fk_Exons_ORFs1` (`ORFs_ORF_ID` ASC) ,
  CONSTRAINT `fk_Exons_ORFs1`
    FOREIGN KEY (`ORFs_ORF_ID` )
    REFERENCES `ninikske_bioldb`.`ORFs` (`ORF_ID` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `ninikske_bioldb`.`Experiment`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `ninikske_bioldb`.`Experiment` (
  `Probe_GenomicPos` INT NOT NULL ,
  `SampleName` VARCHAR(45) NOT NULL ,
  `Intensities` FLOAT NOT NULL ,
  `ExperimentName` VARCHAR(45) NOT NULL ,
  `ProbeID` INT NOT NULL ,
  PRIMARY KEY (`Probe_GenomicPos`, `SampleName`, `ProbeID`) )
ENGINE = InnoDB;

-- -----------------------------------------------------
-- Table `ninikske_bioldb`.`CE`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `ninikske_bioldb`.`CE` (
  `OrfId` VARCHAR(45) NOT NULL ,
  `CodRegId` VARCHAR(45) NOT NULL ,
  `GenPos` INT NOT NULL ,
  `ExpSam` VARCHAR(45) NOT NULL ,
  `ProbeId` INT NOT NULL ,
      PRIMARY KEY (`OrfId`, `CodRegId`, `GenPos`, `ExpSam`, `ProbeId`) ,
  INDEX `fk_CodingRegion_has_Experiment_Experiment1` (`GenPos` ASC, `ExpSam` ASC, `ProbeId` ASC) ,
  INDEX `fk_CodingRegion_has_Experiment_CodingRegion1` (`OrfId` ASC, `CodRegId` ASC) ,
  CONSTRAINT `fk_CodingRegion_has_Experiment_CodingRegion1`
    FOREIGN KEY (`OrfId` , `CodRegId` )
    REFERENCES `ninikske_bioldb`.`CodingRegion` (`ORFs_ORF_ID` , `CodRegID` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_CodingRegion_has_Experiment_Experiment1`
    FOREIGN KEY (`GenPos` , `ExpSam` , `ProbeId` )
    REFERENCES `ninikske_bioldb`.`Experiment` (`Probe_GenomicPos` , `SampleName` , `ProbeID` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

当我通过 Java 执行以下 INSERT 语句时:

String query = "INSERT INTO ninikske_bioldb.CE VALUES('" + cs.getORF_ID().getORF_ID() + "','" + cs.getCodRegID().getCodRegID() + "'," + cs.getExp().getProbePos() + ",'" + cs.getExp().getExpName()+ "', " + cs.getExp().getProbeID() + ");";
Statement stmt = con.createStatement();
stmt.executeUpdate(query);

我收到以下错误:

Cannot add or update a child row: a foreign key constraint fails (`ninikske_bioldb/CE`, CONSTRAINT `fk_CodingRegion_has_Experiment_Experiment1` FOREIGN KEY (`GenPos`, `ExpSam`, `ProbeId`) REFERENCES `Experiment` (`Probe_GenomicPos`, `SampleName`, `ProbeID`) )

我阅读了关于同一错误消息的其他几个问题，但我似乎无法找到我需要的见解。

编辑 查询是: INSERT INTO ninikske_bioldb.CE VALUES('AT3G01190.1','cd474',67262,'H20', 1709);

当我检查父表时，我得到以下结果:

mysql> SELECT * FROM CodingRegion WHERE ORFs_ORF_ID = 'AT3G01190.1';
+----------+----------+---------+-------------+
| CodRegID | CD_Start | CD_Stop | ORFs_ORF_ID |
+----------+----------+---------+-------------+
| cd474    |    67243 |   67649 | AT3G01190.1 | 
| cd475    |    67733 |   67892 | AT3G01190.1 | 
| cd476    |    67991 |   68176 | AT3G01190.1 | 
| cd477    |    68272 |   68484 | AT3G01190.1 | 
+----------+----------+---------+-------------+
4 rows in set (0.00 sec)

mysql> SELECT * FROM CodingRegion WHERE CodRegID = 'cd474';     
+----------+----------+---------+-------------+
| CodRegID | CD_Start | CD_Stop | ORFs_ORF_ID |
+----------+----------+---------+-------------+
| cd474    |    67243 |   67649 | AT3G01190.1 | 
+----------+----------+---------+-------------+
1 row in set (0.03 sec)

mysql> SELECT * FROM Experiment WHERE Probe_GenomicPos = '67262';
+------------------+--------------+-------------+----------------+---------+
| Probe_GenomicPos | SampleName   | Intensities | ExperimentName | ProbeID |
+------------------+--------------+-------------+----------------+---------+
|            67262 | 1signalpart1 |     8.94432 | H20            |    1709 | 
+------------------+--------------+-------------+----------------+---------+
1 row in set (0.00 sec)

mysql> SELECT * FROM Experiment WHERE SampleName = 'H20'
Empty set (0.00 sec)


mysql> SELECT * FROM Experiment WHERE ProbeID = '1709';           
+------------------+--------------+-------------+----------------+---------+
| Probe_GenomicPos | SampleName   | Intensities | ExperimentName | ProbeID |
+------------------+--------------+-------------+----------------+---------+
|            67262 | 1signalpart1 |     8.94432 | H20            |    1709 | 
+------------------+--------------+-------------+----------------+---------+
1 row in set (0.00 sec)

提前致谢。

最佳答案

失败的约束“fk_CodingRegion_has_Experiment_Experiment1”要求您为这三列(GenPos、ExpSam 和 ProbeId)输入的值已经存在于表“ninikske_bioldb.Experiment”的 Probe_GenomicPos、SampleName 和列中探针编号。 (按此顺序。)

在表 ninikske_bioldb.Experiment 中查找这三个值。

SELECT * 
FROM ninikske_bioldb.Experiment
WHERE Probe_GenomicPos = ?
  AND SampleName = '?'
  AND ProbeID = ?

有可能

• 表的主键 实验错误(应包括 实验名称而不是 样本名称)，或
• 外键引用错误 (应引用 ExperimentName 而不是 SampleName)，或者
• 函数 cs.getExp().getExpName() 是使用错误的函数。

我觉得最后一种可能性最大。可能应该是 getSampleName() 或类似的东西。

关于mysql - 无法添加或更新子行 : a foreign key constraint fails，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5994478/