lemmy/migrations/2023-07-06-151124_hot-rank-.../up.sql

17 lines
445 B
PL/PgSQL

CREATE OR REPLACE FUNCTION hot_rank (score numeric, published timestamp without time zone)
RETURNS integer
AS $$
DECLARE
hours_diff numeric := EXTRACT(EPOCH FROM (timezone('utc', now()) - published)) / 3600;
BEGIN
IF (hours_diff > 0) THEN
RETURN floor(10000 * log(greatest (1, score + 3)) / power((hours_diff + 2), 1.8))::integer;
ELSE
RETURN 0;
END IF;
END;
$$
LANGUAGE plpgsql
IMMUTABLE PARALLEL SAFE;