How To Create A Function On A Db...

[masavini]

hi,

i'd like to add a (simple) function to my db... i know i'm not a superuser, could a superuser do it for me?

 

here is the code:

 

DELIMITER $$
CREATE DEFINER=`masavini`@`%` FUNCTION `levenshtein`( s1 VARCHAR(255), s2 VARCHAR(255) ) RETURNS int(11)
   DETERMINISTIC
BEGIN
DECLARE s1_len, s2_len, i, j, c, c_temp, cost INT;
DECLARE s1_char CHAR;
-- max strlen=255
DECLARE cv0, cv1 VARBINARY(256);
SET s1_len = CHAR_LENGTH(s1), s2_len = CHAR_LENGTH(s2), cv1 = 0x00, j = 1, i = 1, c = 0;
IF s1 = s2 THEN
RETURN 0;
ELSEIF s1_len = 0 THEN
RETURN s2_len;
ELSEIF s2_len = 0 THEN
RETURN s1_len;
ELSE
WHILE j <= s2_len DO
SET cv1 = CONCAT(cv1, UNHEX(HEX(j))), j = j + 1;
END WHILE;
WHILE i <= s1_len DO
SET s1_char = SUBSTRING(s1, i, 1), c = i, cv0 = UNHEX(HEX(i)), j = 1;
WHILE j <= s2_len DO
SET c = c + 1;
IF s1_char = SUBSTRING(s2, j, 1) THEN
SET cost = 0; ELSE SET cost = 1;
END IF;
SET c_temp = CONV(HEX(SUBSTRING(cv1, j, 1)), 16, 10) + cost;
IF c > c_temp THEN SET c = c_temp; END IF;
SET c_temp = CONV(HEX(SUBSTRING(cv1, j+1, 1)), 16, 10) + 1;
IF c > c_temp THEN
SET c = c_temp;
END IF;
SET cv0 = CONCAT(cv0, UNHEX(HEX(c))), j = j + 1;
END WHILE;
SET cv1 = cv0, i = i + 1;
END WHILE;
END IF;
RETURN c;
END$$

 

thanks,

matteo

[Krydos]

Does it give an error or anything when you try it?

 

With functions in PhpMyAdmin you don't actually use the DELIMITER command, but rather there is a box below the SQL box labeled Delimiter and that is where you would put your '$$'. Then you would need to change all of your ;'s into $$'s in the function, but it should work once you get all the syntax straight.

[masavini]

yes, it gives me this error:

 

#1227 - Access denied; you need the SUPER privilege for this operation

[masavini]

no kind of hint?