MySQL mysterious error

Question

PHPMyAdmin keeps telling me, that I got an error at line 41 (third last line) . I can't seem to locate it, any help/advice will be appreciated. I've double-checked the IF-THEN syntax, and cursors.

BEGIN
DECLARE `done` BOOLEAN DEFAULT false;
DECLARE `a` TEXT;
DECLARE `cur` CURSOR FOR SELECT `mana_cost` FROM `cards`;   
DECLARE CONTINUE HANDLER FOR NOT FOUND SET `done`=TRUE;



OPEN `cur`;

read_loop : LOOP

    FETCH `cur` INTO `a`;
    IF `done`
    THEN LEAVE read_loop;
    END IF;

    IF `a` LIKE '%{B}%'
    THEN            
        UPDATE `cards` SET `color` = 'BLACK '
        WHERE `mana_cost` = `a`;    
    ELSE IF `a` LIKE '%{G}%'
    THEN            
        UPDATE `cards` SET `color` = 'GREEN '
        WHERE `mana_cost` = `a`;    
    ELSE IF `a` LIKE '%{U}%'
    THEN            
        UPDATE `cards` SET `color` = 'BLUE '
        WHERE `mana_cost` = `a`;    
    ELSE IF `a` LIKE '%{W}%'
    THEN            
        UPDATE `cards` SET `color` = 'WHITE '
        WHERE `mana_cost` = `a`;    
    ELSE IF `a` LIKE '%{R}%'
    THEN            
        UPDATE `cards` SET `color` = 'RED '
        WHERE `mana_cost` = `a`;    

    END IF;

END LOOP;  //line 41
CLOSE `cur`;
END

Answer 1

Your problem is very common, it's because MySQL stop to create the procedure when it sees a ";"

you need to use a DELIMITER to wrap your procedure ;)

DELIMITER $ BEGIN DECLARE done BOOLEAN DEFAULT false; DECLARE a TEXT; DECLARE cur CURSOR FOR SELECT mana_cost FROM cards;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;

OPEN cur;

read_loop : LOOP

FETCH `cur` INTO `a`;
IF `done`
THEN LEAVE read_loop;
END IF;

IF `a` LIKE '%{B}%'
THEN            
    UPDATE `cards` SET `color` = 'BLACK '
    WHERE `mana_cost` = `a`;    
ELSE IF `a` LIKE '%{G}%'
THEN            
    UPDATE `cards` SET `color` = 'GREEN '
    WHERE `mana_cost` = `a`;    
ELSE IF `a` LIKE '%{U}%'
THEN            
    UPDATE `cards` SET `color` = 'BLUE '
    WHERE `mana_cost` = `a`;    
ELSE IF `a` LIKE '%{W}%'
THEN            
    UPDATE `cards` SET `color` = 'WHITE '
    WHERE `mana_cost` = `a`;    
ELSE IF `a` LIKE '%{R}%'
THEN            
    UPDATE `cards` SET `color` = 'RED '
    WHERE `mana_cost` = `a`;    

END IF;

END LOOP; //line 41 CLOSE cur; END $ *DELIMITER ;*

You should try something like that and look the documentation about DELIMITER and MySQL jokes :P

Answer 2

LEAVE read_loop ;
END LOOP read_loop ;

Add the loop name and a LEAVE statement.