Hi all, It seems that some is misunderstanding my problem, so i try to re-write my problem again.
I just wonder. I have tried this example from www.mysql.org Doc. CREATE TABLE parent(id INT NOT NULL, PRIMARY KEY (id)) TYPE=INNODB; CREATE TABLE child(id INT, parent_id INT, INDEX par_ind (parent_id), FOREIGN KEY (parent_id) REFERENCES parent(id) ON DELETE SET NULL ) TYPE=INNODB; But, the constraint does not work propperly. If i add 1 and 2 in the parent table like this: insert into parent values (1); insert into parent values (2); and 1,1 and 1,6 in the child table, like this: insert into child values (1,1); insert into child values (1,6); , it still works !!!!!! What i know, is that the constraint is voilated if i insert the last insert statement (insert into child values (1,6)), because 6 is NOT in the parent table!!!! BTW: Any value is accepted in the child table - Thats Strange!!! Does anyone know if there is a Bug in the mysql, or im just getting it all wrong???? If you know howto make the constraints work please write a little example - Thanks :-) Regards Frank Jørgensen --------------------------------------------------------------------- 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