Mysql - dynamische SQL niet toegestaan ​​in trigger

MYSQL IN FUNCTIE EN TRIGGER ONDERSTEUNEN GEEN DYNAMISCHE INSERT MAAR DE PROCEDURE KAN DYNAMISCHE INSERT ONDERSTEUNEN.

DUS KUNT U WIJZIGINGEN AANBRENGEN IN DE PROCEDURE EN PROCEDURE MAKEN IN attribute_values ​​TABLE INSERT QUERY.

INSERT INTO attribute_values ​​VALUES(product_id,column_name,val);

EN NADAT U GEWOON BELPROCEDURE BENT

CALL attribute_values_after_insert(2,'code',132);

DELIMITER //
drop procedure if exists attribute_values_after_insert //
CREATE PROCEDURE attribute_values_after_insert(IN product_id INT, IN 
column_name VARCHAR(100), IN val VARCHAR(100))
BEGIN
SET @sql = NULL;

INSERT INTO attribute_values VALUES(product_id,column_name,val);

SELECT concat('UPDATE product_attributes SET product_attributes.', column_name, '=', val, ' WHERE id=', product_id) INTO @sql;

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @sql = NULL;
END//
DELIMITER ;

DELIMITER //