Altering constraint delete action
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by Hobhouse
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Published on 2009-08-19T18:21:43Z
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2010/04/09
21:03 UTC
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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?
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