我需要雙眼才能看到爲什麼我無法創建以下外鍵。找出Mysql上的FK創建錯誤
ALTER TABLE `DEFAULTS_OPTIONS`
ADD CONSTRAINT `DEFAULTS_OPTIONS_ibfk_1` FOREIGN KEY (`univers_code`) REFERENCES `UNIVERSES` (`code`) ON DELETE CASCADE ON UPDATE CASCADE;
這裏是表的說明involucrated:
CREATE TABLE `DEFAULTS_OPTIONS` (
`country_code` varchar(2) COLLATE utf8_unicode_ci NOT NULL,
`univers_code` varchar(2) COLLATE utf8_unicode_ci NOT NULL,
`element_code` varchar(3) COLLATE utf8_unicode_ci NOT NULL,
`option_code` varchar(8) COLLATE utf8_unicode_ci NOT NULL,
`element_category` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`country_code`,`univers_code`,`element_code`,`option_code`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
CREATE TABLE `UNIVERSES` (
`country_code` varchar(2) COLLATE utf8_unicode_ci NOT NULL,
`code` varchar(2) COLLATE utf8_unicode_ci NOT NULL,
`description` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`image` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`order` tinyint(4) NOT NULL,
PRIMARY KEY (`country_code`,`code`),
CONSTRAINT `UNIVERSES_ibfk_1` FOREIGN KEY (`country_code`) REFERENCES `COUNTRY` (`id`) ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
,這是錯誤我得到:
Error Code: 1005. Can't create table 'DEV_DEV.#sql-aa2_2e1' (errno: 150)
有誰看到我的錯誤?
預先感謝您的關注。
編輯:
Naktibalda勸我去檢查的
SHOW ENGINE INNODB STATUS
結果來幫助找出原因。