When creating the InnoDB table the InnoDB engine asigns to the FOREIGN KEY you defined a symbol.
On my server it generated "dbmail_messageblks_ibfk_1"... and if in the ALTER statement I entered: DROP FOREIGN KEY dbmail_messageblks_ibfk_1 Then the ALTER table worked fine... If you want to continue with this you should add a symbol name manually like this in the create table statement: CONSTRAINT `fk_message_idnr_manually_set` FOREIGN KEY (`message_idnr`) REFERENCES `messages` (`message_idnr`) Now in the ALTER statement you will have to write before you change the name of the column: DROP FOREIGN KEY `fk_message_idnr_manually_set` If you DROP an index a FOREIGN KEY based on that index will not be dropped automaticaly... Hope this helps ! -- Gabriel PREDA Senior Web Developer -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
