如何每 20 和 30 分钟更新一次值？

Question

I have a table 'comenzi', each order has a value for in progress, and another for ready and data. Each order when it is created has the values for in progress and ready equal to 0. I want to update the values for in progress and ready with 1 min ,after 20 min, then 30 min after the order has been done, the value from data that has the form 2020-05-25 09:41:00.

I need a way to update these values, a function or an event in database.

Answer 1

I was dealing with something using events just yesterday on a pet project. You could use a similar approach.

This code uses a creation column, which is just a TIMESTAMP column with a default value of CURRENT_TIMESTAMP (because I don't have your data) and a value column (default value 0), which goes from 1 - 2 (you can modify this code to suit your needs).

The SET value uses CASE s to check how long ago the order was created. Then it updates the value accordingly. You can change up the event to update whichever columns / time cases you'll need.

CREATE DEFINER =`root`@`localhost` EVENT `progressEvent`
  ON SCHEDULE EVERY 1 MINUTE STARTS '2020-09-01 00:00:00'
  ON COMPLETION PRESERVE ENABLE DO UPDATE comenzi
SET `value` = (
  CASE WHEN (creation < (CURRENT_TIMESTAMP - INTERVAL 30 MINUTE))
  THEN 2
  CASE WHEN (creation < (CURRENT_TIMESTAMP - INTERVAL 20 MINUTE))
  THEN 1
  END)
WHERE value < 2

Edit: Changed it up so that it checks every minute and only 20/ 30 minutes.