Christos, Monday, October 21, 2002, 5:46:07 AM, you wrote: CS> Hello I am a brand new user of MySql, and have some questions about CS> using InnoDB tables.
CS> I noticed in the manual that you can only specify CS> - ON DELETE SET NULL CS> Or CS> - ON DELETE CASCADE CS> What is the default behaviour if nothing is specified? Nothing will be deleted or set to NULL in the child table :-) But if you have row in child table that has value in the reference column equal value in the parent table, you will get an error. CS> Also, does anyone know if there are any plans to support additional CS> options? Full foreign key support is in our future plans. CS> Finally, when you have many tables with a foreign key referencing a CS> table, how does this affect performance of updates on the table being CS> referenced? ON UPDATE CASCADE is not supported yet. So, you will get an error or child row will be successfully updated. -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.net http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Victoria Reznichenko / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net <___/ www.mysql.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
