Hi List, regarding the foreign key definitions:
[CONSTRAINT symbol] FOREIGN KEY (index_col_name, ...) REFERENCES table_name (index_col_name, ...) [ON DELETE {CASCADE | SET NULL | NO ACTION | RESTRICT}] [ON UPDATE {CASCADE | SET NULL | NO ACTION | RESTRICT}]
Is there a default action for ON DELETE and ON UPDATE if no action is specified in the database definition?
The NO ACTION action seems to cover this. :-)
I presume RESTRICT makes it impossible to delete a record from the parent table if there are any references from a child record to the parent for that key?
It's unimplemented.
The MySQL documentation on the web does not seem to say anything about this...
Best regards, Tor Rune Skoglund [EMAIL PROTECTED]
sql query
-- Paul DuBois http://www.kitebird.com/ sql, query
--------------------------------------------------------------------- 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
