anchor.diff:  CREATE TABLE `STUDY_GROUPS` (
     `email` varchar(255) NOT NULL,
     `groupname` varchar(64) NOT NULL,
  -  PRIMARY KEY (`email`,`groupname`)
  +  PRIMARY KEY (`email`,`groupname`),
  +  CONSTRAINT `STUDY_GROUPS_ibfk_1` FOREIGN KEY (`email`) REFERENCES `USERS` (`EMAIL`) ON DELETE CASCADE
   ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
   /*!40101 SET character_set_client = @saved_cs_client */;
   
  
positive.code:   `path` varchar(255) NOT NULL,
    `name` varchar(255) NOT NULL,
    PRIMARY KEY (`job_id`,`name`),
    CONSTRAINT `FK_job_input_files_job_id` FOREIGN KEY (`job_id`) REFERENCES `jobhistory` (`id`),
    CONSTRAINT `job_input_files_ibfk_1` FOREIGN KEY (`job_id`) REFERENCES `jobhistory` (`id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
  /*!40101 SET character_set_client = @saved_cs_client */;
  
  
negative.code:   UNIQUE KEY `acronym` (`acronym`),
    KEY `FK_SAMPLECOLLECTIONS_study` (`study`),
    KEY `FK_SAMPLECOLLECTIONS_contact` (`contact`),
    CONSTRAINT `SAMPLECOLLECTIONS_ibfk_1` FOREIGN KEY (`contact`) REFERENCES `USERS` (`EMAIL`),
    CONSTRAINT `SAMPLECOLLECTIONS_ibfk_2` FOREIGN KEY (`study`) REFERENCES `study` (`name`)
  ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
  