MySQL 5.7 - advanced patterns with Conditional Updates Using CASE Statement in Triggers
I've searched everywhere and can't find a clear answer. I'm working with an scenario with a MySQL trigger that updates a record based on a condition using a CASE statement. The trigger is supposed to update the `status` column of the `orders` table whenever a new record is inserted into the `order_updates` table. Here's the relevant trigger code: ```sql CREATE TRIGGER update_order_status AFTER INSERT ON order_updates FOR EACH ROW BEGIN UPDATE orders SET status = CASE WHEN NEW.update_type = 'cancel' THEN 'canceled' WHEN NEW.update_type = 'complete' THEN 'completed' ELSE status END WHERE id = NEW.order_id; END; ``` However, when I insert a new record into `order_updates` with `update_type` as `cancel`, the `status` in the `orders` table is not updating as expected. Instead, it remains the same. Here’s the insert statement I'm using: ```sql INSERT INTO order_updates (order_id, update_type) VALUES (1, 'cancel'); ``` I've checked to ensure that `order_id` 1 exists in the `orders` table. To troubleshoot, I added a logging mechanism to the trigger to log when the trigger is firing and what values are being used in the update, but nothing gets logged when I perform the insert. I've also verified that there are no errors in the MySQL logs that would suggest an scenario. Could this behavior be a result of an incorrect trigger definition or perhaps a misunderstanding of how the CASE statement works within a trigger context? Any insights or suggestions on how to address this would be greatly appreciated. I'm coming from a different tech stack and learning Sql. Could this be a known issue? I'm developing on Windows 11 with Sql. Am I approaching this the right way?