I have a MySQL table with foreign key constraints, eg.
CREATE TABLE `yiingles_version` (
`id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`package_id` int(11) NOT NULL,
`version` varchar(64) NOT NULL DEFAULT '',
`distUrl` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `package_id` (`package_id`),
CONSTRAINT `yiingles_version_ibfk_1`
FOREIGN KEY (`package_id`) REFERENCES `yiingles_package` (`id`)
ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
How can I get programmatically the values for ON DELETE
and ON UPDATE
, in this case CASCADE
?
I've seen this question and also took a look at MySQL's information_schema
database, but did not find a way to get the values mentioned above.
Have a look at the information_schema.referential_constraints
table. Specifically, the UPDATE_RULE
and DELETE_RULE
columns.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.