Question

I’m getting the error below when I attempt to create a table with a couple foreign keys. It goes smoothly if I only include the userID foreign key, but complains when I try to get the other foreign key in there as well. What’s the deal?

ERROR 1005: Can't create table 'ps5_lwilkins.PhoneNumber' (errno: 150)

SQL Statement:

CREATE  TABLE `ps5_lwilkins`.`PhoneNumber` (    
  `userID` CHAR(25) NOT NULL ,
  `resumeID` CHAR(30) NOT NULL ,
  `number` CHAR(45) NOT NULL ,
  PRIMARY KEY (`userID`, `resumeID`, `number`) ,
  INDEX `user_phoneNumber_fk1` (`userID` ASC) ,
  INDEX `resume_phoneNumber_fk3` (`resumeID` ASC) ,
  CONSTRAINT `user_phoneNumber_fk1`
    FOREIGN KEY (`userID` )
    REFERENCES `ps5_lwilkins`.`User` (`userID` )
    ON DELETE CASCADE
    ON UPDATE NO ACTION,
  CONSTRAINT `resume_phoneNumber_fk3`
    FOREIGN KEY (`resumeID` )
    REFERENCES `ps5_lwilkins`.`Resume` (`resumeID` )
    ON DELETE CASCADE
    ON UPDATE NO ACTION)
ENGINE = InnoDB

Here’s the schema for User:

User(userid: CHAR(25), pass: VARCHAR(25)) userid is the PK

Here’s the schema for Resume:

Resume(userID: CHAR(25), resumeID: CHAR(30)

few other none important attributes). PK is (userID, resumeID).

Any ideas? Need more information?

Looking at other problems similar to this, I think it’s somehow a malformed FK on the resumeID… but I can’t see where!

I’ve tried several different names for the FK constraint btw.

EDIT: I don’t have the privilege to perform SHOW ENGINE INNODB STATUS

Answer 1

You’re on the right track with your comment above. You need to change this:

  INDEX `user_phoneNumber_fk1` (`userID` ASC) ,
  INDEX `resume_phoneNumber_fk3` (`resumeID` ASC) ,

and this:

    FOREIGN KEY (`resumeID` )
    REFERENCES `ps5_lwilkins`.`Resume` (`resumeID` )

to this:

  INDEX `phoneNumber_fks` (`userID` ASC, `resumeID` ASC) ,

and this:

    FOREIGN KEY (`userID`, `resumeID` )
    REFERENCES `ps5_lwilkins`.`Resume` (`userID`, `resumeID` )