Question

I’ve made a theater tickets booking website (user-> book and pay / admin->manage sells from a webinterface).
I use a table in mysql database to handle tickets: each column is a specific day and each line of this day is a boolean to know which seat is booked (1 for booked, 0 for free).
But i wanted to improve this system and have a third state for when the user is currently booking online and has not paid (finalized the order) yet to prevent the other users to book his seats.
So, is there a way to save this third state (-1 for example) for a limited time only (about 15min) in the tickets table ?

thank you in advance

Answer 1

Use onInsert/onUpdate trigger with SLEEP(<seconds>).

Updated:

mysql> delimiter //
mysql> CREATE TRIGGER ins_trig BEFORE INSERT ON tickets
    -> FOR EACH ROW
    -> BEGIN
    -> DO SLEEP(60000);
    -> UPDATE tickets SET status=1 WHERE id = NEW.id;
    -> END;
    -> //

Pay attention that triggers can be set from root only.