An existing process changes the status field of a booking record in a table, in response to user input.
I have another process to write, that will run asynchronously
I also like this answer from le dorfier in the previous discussion:
I've used tables first, then refactor to a full-fledged msg queue when (and if) there's reason - which is trivial if your design is reasonable.
Thanks, folks, for all the answers. Most helpful.