# Header section
# Define incrementing schema version number
SET @schema_version = '22';

# Add field device_type to campaign_tracker

# Create ALTER TABLE PROCEDURE
DROP PROCEDURE IF EXISTS `alterbyregexp`;
DELIMITER //
CREATE PROCEDURE alterbyregexp(`table_regexp` VARCHAR(255), `altertext` VARCHAR(255))
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE tbl VARCHAR(255);
DECLARE curs CURSOR FOR SELECT table_name FROM information_schema.tables WHERE table_schema = (SELECT DATABASE()) and table_name like table_regexp;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN curs;

read_loop: LOOP
FETCH curs INTO tbl;
IF done THEN
  LEAVE read_loop;
END IF;
SET @query = CONCAT('ALTER TABLE `', tbl, '`' , altertext);
PREPARE stmt FROM @query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END LOOP;
CLOSE curs;
END;
//
DELIMITER ;

# Add field device_type to campaign_tracker
CALL alterbyregexp('campaign\_tracker%', 'ADD COLUMN `device_type` varchar(50) DEFAULT NULL AFTER `ip`');
DROP PROCEDURE IF EXISTS `alterbyregexp`;

# Footer section
LOCK TABLES `settings` WRITE;
INSERT INTO `settings` (`key`, `value`) VALUES('db_schema_version', @schema_version) ON DUPLICATE KEY UPDATE `value`=@schema_version;
UNLOCK TABLES;