| adels | CREATE TABLE `adels` (
  `name` varchar(255) NOT NULL,
  `description` varchar(255) NOT NULL,
  `main` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`name`),
  KEY `main` (`main`),
  CONSTRAINT `adels_ibfk_1` FOREIGN KEY (`main`) REFERENCES `adels` (`name`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1 |

perm_name, perm_desc, NULL
role_name, role_desc, perm_name

perm_name2, perm_desc, NULL
role_name, role_desc, perm_name2

UPDATE `adels` SET `name` = 'perm_name2' WHERE `adels`.`name` = 'perm_name'

#1451 - Cannot delete or update a parent row: a foreign key constraint fails (`full`.`adels`, CONSTRAINT `adels_ibfk_1` FOREIGN KEY (`main`) REFERENCES `adels` (`name`) ON DELETE CASCADE ON UPDATE CASCADE)