1 CREATE OR REPLACE FUNCTION hot_rank(score numeric, published timestamp without time zone)
5 hours_diff numeric := EXTRACT(EPOCH FROM (timezone('utc', now()) - published)) / 3600;
7 IF (hours_diff > 0) THEN
8 RETURN floor(10000 * log(greatest(1, score + 3)) / power((hours_diff + 2), 1.8))::integer;
15 IMMUTABLE PARALLEL SAFE;