32.4.14: Can MySQL 5.1 stored routines return result sets?Stored procedures can, but stored functions cannot. If you perform an ordinary SELECT inside a stored procedure, the result set is returned directly to the client. You need to use t…

Kazuho at Work: Performance of MySQL UDFs vs. Native Functionsほとんどの場合は気にする必要ないんじゃないかなぁ。郵便局行ってから出社する。