Altering constraint delete action
Posted
by Hobhouse
on Stack Overflow
See other posts from Stack Overflow
or by Hobhouse
Published on 2009-08-19T18:21:43Z
Indexed on
2010/04/09
21:03 UTC
Read the original article
Hit count: 333
I did this:
ALTER TABLE `db`.`my_table`
ADD CONSTRAINT FOREIGN KEY (`my_second_table_id`)
REFERENCES `my_second_table` (`id`);
I should have done this:
ALTER TABLE `db`.`my_table`
ADD CONSTRAINT FOREIGN KEY (`my_second_table_id`)
REFERENCES `my_second_table` (`id`)
ON DELETE SET NULL;
Is it possible to ALTER this, or do I have to drop the constraint and add again?
© Stack Overflow or respective owner
