Muhammed, ----- Original Message ----- From: "Muhammed Syyid" <[EMAIL PROTECTED]> Newsgroups: mailing.database.mysql Sent: Thursday, January 16, 2003 3:06 PM Subject: Re: InnoDB Foreign Key Questions
> Second the same question :). What does the CONSTRAINT keyword > regarding FOREIGN KEYS do? the constraint name is simply ignored. > Karam Chand, as far as I know, the drop command hasn't been > implemented yet. So the only way to drop a foreign key is to drop and > re-create the table. DROP FOREIGN KEY will come in some 4.1.x version. Since the constraint name is not stored, and is not required by the FOREIGN KEY syntax, I think that the syntax could be ALTER TABLE frobboz DROP FOREIGN KEY (column1) REFERENCES abbaguu (column2); > Muhammed Best regards, Heikki Tuuri Innobase Oy --- Order technical MySQL/InnoDB support at https://order.mysql.com/ See http://www.innodb.com for the online manual and latest news on InnoDB sql query > [EMAIL PROTECTED] (Karam Chand) wrote in message news:<avva22$168e$[EMAIL PROTECTED]>... > > Hello > > > > I have two tables of InnoDB type. > > > > CREATE TABLE `ledger` ( > > `id` int(11) NOT NULL auto_increment, > > `name` varchar(50) default NULL, > > PRIMARY KEY (`id`), > > KEY `id` (`name`) > > ) TYPE=InnoDB; > > > > CREATE TABLE `voucher` ( > > `id` int(11) NOT NULL default '0', > > `vdate` date NOT NULL default '0000-00-00', > > `amount` decimal(10,0) default '100', > > `name` varchar(50) default 'Karam', > > PRIMARY KEY (`id`,`vdate`) > > ) TYPE=InnoDB; > > > > Now I add a Foreign Key reference to ledger.id for > > voucher id by using the following command - > > > > alter table voucher > > add constraint fk_key_1 foreign key (id) references > > ledger (id) > > > > now when i do a query - > > > > show table status like 'voucher' > > > > I am getting the following value in the comment field. > > > > InnoDB free: 23552 kB; (id) REFER rohit/ledger(id) > > > > It shows that foreign key has been made but i had > > specified it to be fk_key_1. Even if I make the > > Foreign Key without the keyword constraint the same > > thing happens ? > > > > So, what is the purpose of CONSTRAINT keyword. How can > > I give a name to a relationship. > > > > Also after reading the MySQL and InnoDB docs I am not > > able to guess how to drop a FOREIGN KEY ? > > > > How can I do that ? > > > > I am using mysql-mx-nt 3.23.54 running as a service in > > WinXP. > > > > Any help will be appreciated. Thanks in advance. > > > > Karam > > > > sql, query ( filteraide ) > > > > > > __________________________________________________ > > Do you Yahoo!? > > Yahoo! Mail Plus - Powerful. Affordable. Sign up now. > > http://mailplus.yahoo.com > > > > --------------------------------------------------------------------- > > Before posting, please check: > > http://www.mysql.com/manual.php (the manual) > > http://lists.mysql.com/ (the list archive) > > > > To request this thread, e-mail <[EMAIL PROTECTED]> > > To unsubscribe, e-mail <[EMAIL PROTECTED]> > > Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
