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error in foreign key constraint definition
Posted by: Matteo Tassinari
Date: November 08, 2012 11:00AM

Hi everybody,

I have a problem creating a foreign key constraint between two tables.

Here is the first table:

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;

And here is the second one:

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;

The problem happens the I try to do this:

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;

And I get this error:

#1005 - Can't create table 'db_626suite.#sql-71c_13d5' (errno: 150)

While the command SHOW INNODB STATUS says:

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

But the syntax and fields definitions seem correct to me. What am I doing wrong?

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