MySQL stored procedure, handling multiple cursors and query results

Question

How can I use two cursors in the same routine? If I remove the second cursor declaration and fetch loop everthing works fine. The routine is used for adding a friend in my webap

Answer 1

I have finally written a different function that does the same thing:

DROP PROCEDURE IF EXISTS addNewFriend;
DELIMITER //
CREATE PROCEDURE addNewFriend(IN inUserId INT UNSIGNED, IN inFriendEmail VARCHAR(80))
BEGIN
 SET @tempFriendId = (SELECT id FROM users WHERE email = inFriendEmail);
 SET @tempUsersFriendsUserId = (SELECT user_id FROM users_friends WHERE user_id = inUserId AND friend_id = @tempFriendId);
 IF @tempFriendId IS NOT NULL AND @tempUsersFriendsUserId IS NULL THEN
  INSERT INTO users_friends (user_id, friend_id) VALUES(inUserId, @tempFriendId);
 END IF;
 SELECT @tempFriendId as friendId;
END //
DELIMITER ;

I hope this is a better solution, it works fine anyway. Thanks for telling me not to use cursors when not necessary.