Return value from MySQL stored procedure

Question

So I\'ve finally decided to get around to learning how to use stored procedures, and although I do have them working, I\'m unsure if I\'m doing it correctly - aka. the b

Answer 1

If you want this:

DECLARE doesTagExist BOOL;
SET doesTagExist = CheckTagExist('str');

then you should use functions:

DELIMITER //
 CREATE FUNCTION CheckTagExists(
   tagName VARCHAR(255)
 )
 BEGIN
   DECLARE doesTagExist BOOL;

 -- Check if tag exists
 SELECT
  EXISTS(
   SELECT
    *
   FROM
    tags
   WHERE
    tags.NAME = tagName
  )
 INTO
  doesTagExist;

  RETURN doesTagExist;
END //
DELIMITER ;