ERROR #1054 - Unknown column 'program_id' in 'NEW - mysql

Question

Tring to achieve-
I am trying to update color_status in tb_sites_3 (3 will be dynamic based on program_id which we will get from tb_tickets) Whenever any insert is made on tb_jobs.
ERROR
While creating a trigger I am getting the following error
ERROR #1054 - Unknown column 'program_id' in 'NEW'
tb_tickets
tb_jobs
tb_sites_3
DELIMITER //
CREATE TRIGGER trig_job_color
BEFORE INSERT ON `tb_jobs`
FOR EACH ROW
BEGIN
SET NEW.program_id = (Select program_id from tb_tickets
where tb_tickets.job_id = NEW.job_id);
SET NEW.status = (Select status from tb_tickets
where tb_tickets.job_id = NEW.job_id);
CASE NEW.program_id
WHEN 1 THEN
UPDATE tb_sites_1
SET color_status = NEW.status
WHERE site_id = NEW.site_id;
WHEN 2 THEN
UPDATE tb_sites_2
SET color_status = NEW.status
WHERE site_id = NEW.site_id;
WHEN 3 THEN
UPDATE tb_sites_3
SET color_status = NEW.status
WHERE site_id = NEW.site_id;
END CASE;
END //
DELIMITER ;
Table definations
tb_tickets
CREATE TABLE `tb_tickets` (
`id` int(15) NOT NULL,
`ticket_id` int(15) NOT NULL,
`job_id` int(11) NOT NULL,
`site_id` varchar(200) NOT NULL,
`program_id` int(11) NOT NULL,
`status` varchar(200) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
tb_jobs
CREATE TABLE `tb_jobs` (
`job_id` int(11) NOT NULL AUTO_INCREMENT,
`job_creation` date DEFAULT NULL,
PRIMARY KEY (`job_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1
tb_sites_3
CREATE TABLE `tb_sites_3` (
`id` int(15) NOT NULL AUTO_INCREMENT,
`color_status` int(15) NOT NULL,
`site_id` varchar(200) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1

Answer 1

CREATE TRIGGER trig_job_color AFTER INSERT ON tb_jobs
FOR EACH ROW BEGIN
SET #program_id = (Select program_id from tb_tickets
where tb_tickets.job_id = NEW.job_id);
SET #newstatus = (Select status from tb_tickets
where tb_tickets.job_id = NEW.job_id);
SET #newsite_id = (Select site_id from tb_tickets
where tb_tickets.job_id = NEW.job_id);
CASE #program_id
WHEN 1 THEN
UPDATE tb_sites_3
SET tb_sites_3.color_status = #newstatus
WHERE tb_sites_3.site_id = #newsite_id;
WHEN 2 THEN
UPDATE tb_sites_3
SET tb_sites_3.color_status = #newstatus
WHERE tb_sites_3.site_id = #newsite_id;
WHEN 3 THEN
UPDATE tb_sites_3
SET tb_sites_3.color_status = #newstatus
WHERE tb_sites_3.site_id = #newsite_id;
END CASE;
END

Answer 2

This worked for me using variables.
DELIMITER //
CREATE TRIGGER trig_job_color
AFTER INSERT ON `tb_jobs`
FOR EACH ROW
BEGIN
DECLARE x, y INT DEFAULT 0;
DECLARE z varchar(50);
SET x = (Select program_id from tb_tickets
where tb_tickets.job_id = NEW.job_id);
SET y = (Select status from tb_tickets
where tb_tickets.job_id = NEW.job_id);
SET Z = (Select site_id from tb_tickets
where tb_tickets.job_id = NEW.job_id);
CASE x
WHEN 1 THEN
UPDATE tb_sites_1
SET color_status = y
WHERE site_id = z;
WHEN 2 THEN
UPDATE tb_sites_2
SET color_status = y
WHERE site_id = z;
WHEN 3 THEN
UPDATE tb_sites_3
SET color_status = y
WHERE site_id = z;
END CASE;
END //
DELIMITER ;