MySQL: failed to create function {functionName} - mysql

Question

This works on MySQL 5.0.41, but on 5.1.31 it just says "failed to create function".
I type this in the console:
delimiter |
<press enter>
CREATE DEFINER=`root`#`localhost` FUNCTION `ucwords`( str VARCHAR(128) ) RETURNS varchar(128) CHARSET utf8
BEGIN
DECLARE c CHAR(1);
DECLARE s VARCHAR(128);
DECLARE i INT DEFAULT 1;
DECLARE bool INT DEFAULT 1;
DECLARE punct CHAR(17) DEFAULT ' ()[]{},.-_!#;:?/';
SET s = LCASE( str );
WHILE i < LENGTH( str ) DO
BEGIN
SET c = SUBSTRING( s, i, 1 );
IF LOCATE( c, punct ) > 0 THEN
SET bool = 1;
ELSEIF bool=1 THEN
BEGIN
IF c >= 'a' AND c <= 'z' THEN
BEGIN
SET s = CONCAT(LEFT(s,i-1),UCASE(c),SUBSTRING(s,i+1));
SET bool = 0;
END;
ELSEIF c >= '0' AND c <= '9' THEN
SET bool = 0;
END IF;
END;
END IF;
SET i = i+1;
END;
END WHILE;
RETURN s;
END |
<press enter>
I have even tried minimizing it to just:
delimiter |
<press enter>
CREATE DEFINER=`root`#`localhost` FUNCTION `ucwords`( str VARCHAR(128) ) RETURNS varchar(128) CHARSET utf8
BEGIN
DECLARE s VARCHAR(128);
RETURN s;
END |
<press enter>
I have even tried it without the definer, just using:
delimiter |
<press enter>
CREATE FUNCTION `ucwords`( str VARCHAR(128) ) RETURNS varchar(128) CHARSET utf8
BEGIN
DECLARE s VARCHAR(128);
RETURN s;
END |
<press enter>

Answer 1

Did you recently upgrade from MySQL 5.0 to 5.1? If so, you need to run the mysql_upgrade script to update the system tables. In this case, the mysql.proc table schema changed, which could explain your problem:
http://dev.mysql.com/doc/refman/5.1/en/mysql-upgrade.html
More on upgrading to 5.1:
http://dev.mysql.com/doc/refman/5.1/en/upgrading-from-previous-series.html