Hi,
I have an 'event' table and an 'event_date' table pointing to it
containing (potentially) several event dates (start and (optionnaly)
end) for the event in the past, present and future.
I'm trying to build a query to select the most "relevant" date:
'current' or 'next' or 'last' (by order of priority).
Actually I already have a view of event+"most relevant"event_date:
CREATE VIEW event_story_review AS
SELECT d.* FROM event_list_story_review d
WHERE (d.id_date = (SELECT d2.id_date FROM event_date d2 WHERE
(d2.id_event = d.id_event)
ORDER BY d2.end_date is not null desc,
(d2.end_date >= d.today) DESC,
d2.start_date LIMIT 1));
This works but I am bothered by the subquery which has a slight
performance impact on all queries using this view (there are many in my
app).
Is there a better way of doing it? maybe without a subquery?
Thanks,
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