Question

i have a table like this:

ID ID_USER SOURCE CONTENT

or just:

CREATE TABLE `p_l_0215` (
  `id` bigint(20) NOT NULL auto_increment,
  `id_user` bigint(20) NOT NULL,
  `source` varchar(50) NOT NULL,
  `content` text NOT NULL,
  KEY `id` (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=2 ;

I want to update when ID_USER=Value1 and SOURCE=‘default’ if this condition do not exist i want to insert. I know the method when i have a duplicate key, but in this table ID_USER neither SOURCE could be UNIQUE. So how can i solve this? Thanks for any help!

Answer 1

1) create the procedure

delimiter //
CREATE PROCEDURE smartInsert(given_id_user bigint(20),given_source varchar(50), given_content text) 
BEGIN 

IF (EXISTS(SELECT * FROM p_l_0215 WHERE `id_user`=given_id_user AND `source`=given_source))
THEN
    UPDATE p_l_0215 SET `content`=given_content WHERE `id_user`=given_id_user AND `source`=given_source;
ELSE
      INSERT INTO p_l_0215 VALUES (null, given_id_user, given_source, given_content);
END IF;
END//
delimiter ;

2) then just call it like this CALL smartInsert(13, 'some_source', 'some content');