我在創建兩個表之間的外鍵約束時遇到問題。InnoDB外鍵定義無法解析列名
這是第一個表:
CREATE TABLE `agews_rifiuti_cer` (
`id_cer` int(10) unsigned NOT NULL AUTO_INCREMENT,
`agews_id` int(10) unsigned DEFAULT '0',
`livello` tinyint(4) DEFAULT '1',
`codice` varchar(10) DEFAULT NULL,
`descrizione` varchar(255) DEFAULT NULL,
`note` text,
`flag_pericoloso` tinyint(1) DEFAULT '0',
`id_cliente` int(10) unsigned DEFAULT '1',
`flag_modificato` char(1) DEFAULT 'N',
PRIMARY KEY (`id_cer`),
KEY `fk_id_cliente_agews_sgs_codici_cer` (`id_cliente`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
這裏是第二個:
CREATE TABLE `lin_98_47_rifiuti` (
`id_rifiuto` int(10) unsigned NOT NULL AUTO_INCREMENT,
`id_azienda` int(10) unsigned NOT NULL DEFAULT '1',
`id_sede` int(10) unsigned NOT NULL DEFAULT '1',
`revisione_documento` int(10) unsigned NOT NULL DEFAULT '0',
`rifiuto` varchar(255) DEFAULT NULL,
`codice_cer` varchar(10) DEFAULT NULL,
`nome_interno` varchar(255) DEFAULT NULL,
`descrizione` text,
`materie_prime` text,
`contenitore` text,
`deposito` text,
`data_ultima_analisi` date DEFAULT NULL,
`stato_fisico` enum('Solido pulverulento','Solido non pulverulento','Fangoso palabile','Liquido') DEFAULT 'Solido non pulverulento',
`quantita` float(9,1) DEFAULT '0.0',
`unita_misura` enum('Kg','l','mc') DEFAULT 'Kg',
`id_pericolo` int(10) unsigned DEFAULT NULL,
`destino` enum('Recupero','Smaltimento') DEFAULT NULL,
`id_recupero` int(10) unsigned DEFAULT NULL,
`id_smaltimento` int(10) unsigned DEFAULT NULL,
`id_cer` int(10) unsigned DEFAULT NULL,
`immagine` varchar(255) DEFAULT NULL,
`image_type` varchar(20) DEFAULT NULL,
`image_content` mediumblob,
`image_size_x` smallint(5) unsigned DEFAULT '0',
`image_size_y` smallint(5) unsigned DEFAULT '0',
`flag_storico` tinyint(1) DEFAULT '0',
`id_responsabile` int(10) unsigned DEFAULT '0',
`nome_responsabile` varchar(255) DEFAULT '0',
`id_ultima_modifica` int(10) unsigned DEFAULT '0',
`create_log` tinyint(1) DEFAULT '1',
PRIMARY KEY (`id_rifiuto`,`id_azienda`,`id_sede`,`revisione_documento`),
KEY `fk_main_lin_98_47_rifiuti` (`id_azienda`,`id_sede`,`revisione_documento`),
KEY `fk_id_responsabile_lin_98_47_rifiuti` (`id_responsabile`,`id_azienda`,`id_sede`,`revisione_documento`,`nome_responsabile`),
KEY `fk_id_pericolo_lin_98_47_rifiuti` (`id_pericolo`),
KEY `fk_id_recupero_lin_98_47_rifiuti` (`id_recupero`),
KEY `fk_id_smaltimento_lin_98_47_rifiuti` (`id_smaltimento`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
的問題發生在我嘗試這樣做:
ALTER TABLE lin_98_47_rifiuti ADD CONSTRAINT fk_id_cer_lin_98_47_rifiuti FOREIGN KEY (id_cer) REFERENCES agews_rifiuti_cer(id_cer) ON UPDATE CASCADE ON DELETE CASCADE;
我得到這個錯誤:
#1005 - Can't create table 'db_626suite.#sql-71c_13d5' (errno: 150)
雖然命令SHOW INNODB STATUS說:
Error in foreign key constraint of table db_626suite/#sql-71c_13d5:
FOREIGN KEY (id_cer) REFERENCES agews_rifiuti_cer(id_cer) ON UPDATE CASCADE ON DELETE CASCADE:
Cannot resolve column name close to:
) ON UPDATE CASCADE ON DELETE CASCADE
但語法和字段的定義似乎正確的給我。我究竟做錯了什麼?
編輯:
馬克乙建議,可能是由於該id_cer
被定義爲agews_rifiuti_cer
NOT NULL
的事實,但我不認爲是這樣的話,其實請考慮這個其他表:
CREATE TABLE `agews_rifiuti_pericolo` (
`id_pericolo` int(10) unsigned NOT NULL AUTO_INCREMENT,
`agews_id` int(10) unsigned DEFAULT '0',
`codice` varchar(255) DEFAULT NULL,
`pericolo` varchar(255) DEFAULT NULL,
`note` text,
`id_cliente` int(10) unsigned DEFAULT '1',
`flag_modificato` char(1) DEFAULT 'N',
PRIMARY KEY (`id_pericolo`),
KEY `codice_rifiuti_recupero` (`codice`),
KEY `fk_id_cliente_rifiuti_pericolo` (`id_cliente`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
這裏id_pericolo
如上定義爲NOT NULL
爲id_cer
,然而這個完美的作品:
ALTER TABLE lin_98_47_rifiuti ADD CONSTRAINT fk_id_pericolo_lin_98_47_rifiuti FOREIGN KEY (id_pericolo) REFERENCES agews_rifiuti_pericolo(id_pericolo) ON UPDATE CASCADE ON DELETE SET NULL;
即使lin_98_47_rifiuti
領域id_pericolo
定義爲DEFAULT NULL
編輯2:
我只是想這個最小設置:
CREATE TABLE `cer` (
`id_cer` int(10) unsigned NOT NULL AUTO_INCREMENT,
`codice` varchar(10) DEFAULT NULL,
PRIMARY KEY (`id_cer`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `rifiuti` (
`id_rifiuto` int(10) unsigned NOT NULL AUTO_INCREMENT,
`id_cer` int(10) unsigned NULL DEFAULT NULL,
`rifiuto` varchar(10) DEFAULT NULL,
PRIMARY KEY (`id_rifiuto`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
ALTER TABLE rifiuti ADD FOREIGN KEY (id_cer) REFERENCES cer(id_cer) ON UPDATE CASCADE ON DELETE CASCADE;
和它的所有工作正常,但我做的不明白我的原始查詢中可能存在什麼問題。
另外我認爲這證明這不是一個定義字段爲NOT NULL
或DEFAULT NULL
的問題。
最小樣本怎麼樣? – Jasper
你需要什麼樣的最小樣本?這不是插入數據的問題,僅僅是表格定義,我已經給出了所有的規格。 –
表中只包含導致問題所需的列的類似插入。你可能會在設置時找到解決方案。 – Jasper