Trigger value, call for table column and concenate with text - mysql

Question

I am not able to solve that [CREATE TRIGGER VALUE] needs to call for table content and concatenate with text. For details of expected result, see below result area.
Currently the code can be run In one execution, creating 2 lines in account_log as expected.
I have marked the line that I suspect needs to be update with [<-- Needs update?].
CREATE DATABASE IF NOT EXISTS test6;
USE test6;
DROP TABLE IF EXISTS account;
CREATE TABLE account
(
`id` CHAR(4) PRIMARY KEY,
`name` VARCHAR(25),
`price` DECIMAL(4, 2)
);
DROP TABLE IF EXISTS account_log;
CREATE TABLE account_log
(
`log_id` INTEGER PRIMARY KEY AUTO_INCREMENT,
`timestamp` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
`description` VARCHAR(60)
);
DELETE FROM account;
INSERT INTO account
VALUES
('1', 'Adam', 10),
('2', 'Eva', 7)
;
DROP PROCEDURE IF EXISTS product_update;
DELIMITER ;;
CREATE PROCEDURE product_update()
BEGIN
UPDATE account
SET
name = "Ad"
WHERE
id = "1";
END
;;
DELIMITER ;
DROP TRIGGER IF EXISTS after_account_update;
CREATE TRIGGER after_account_update
AFTER UPDATE
ON account
FOR EACH ROW
INSERT INTO
account_log (`description`)
VALUES
('Update detected: Productid: [product-1]') -- <-- Needs update?
;
-- ----------------------------
-- Provoke triggers to execute.
-- ----------------------------
CALL product_update();
CALL product_update();
SELECT * FROM account_log;
Results:
The result looks currently like this:
(the content of description is plain text).
+--------+---------------------+-----------------------------------------+
| log_id | timestamp | description |
+--------+---------------------+-----------------------------------------+
| 1 | 2019-03-28 18:14:58 | Update detected: Productid: [product-1] |
| 2 | 2019-03-28 18:14:58 | Update detected: Productid: [product-1] |
+--------+---------------------+-----------------------------------------+
I need the result to look like this
(where the values 1 and 2 in table description, comes from table account, column [id]):
+--------+---------------------+-----------------------------------------+
| log_id | timestamp | description |
+--------+---------------------+-----------------------------------------+
| 1 | 2019-03-28 18:14:58 | Update detected: Productid: 1 |
| 2 | 2019-03-28 18:14:58 | Update detected: Productid: 2 |
+--------+---------------------+-----------------------------------------+

Answer 1

It works by using below TRIGGER VALUES CONCAT:
CREATE TRIGGER after_account_insert
AFTER INSERT
ON account
FOR EACH ROW
INSERT INTO
account_log (`description`)
VALUES
(
CONCAT("Update detected: Productid: ", "[", NEW.id, "]", ".")
)
;