sql - How to get rid of "Error 1329: No data - zero rows fetched, selected, or processed"

Question

I have a stored procedure which does not need to return any values. It runs smoothly and without any problem. However, it outputs an error message after finishing its run:

Error: No data - zero rows fetched, selected, or processed

How can I get rid of this error message?

CREATE PROCEDURE `testing_proc`()  
    READS SQL DATA  
BEGIN  
    DECLARE done INT DEFAULT 0;
    DECLARE l_name VARCHAR(20);
    DECLARE my_cur CURSOR FOR
        SELECT name FROM customer_tbl;
    OPEN my_cur;
        my_cur_loop:
        LOOP FETCH my_cur INTO l_name;
            IF done = 1 THEN
                LEAVE my_cur_loop;
            END IF;
            INSERT INTO names_tbl VALUES(l_name);
        END LOOP my_cur_loop;
    CLOSE my_cur;
END

Answer 1

I guess you just forgot to include the following line in your post:

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

Your code is correct, but bug/strange behaviour of mysql causes the warning to appear even if it was handled. You can avoid that if you add a "dummy" statement to the end of your procedure that invovles a table and is successful, this will clear the warning. (See http://dev.mysql.com/doc/refman/5.5/en/show-warnings.html) In your case:

SELECT name INTO l_name FROM customer_tbl LIMIT 1;

after the end of the loop. On MySQL 5.5.13 the warning disappears, on Linux and Windows. I commented on MySQL Bug 60840 and I hope they will fix it some time in the future...