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CREATE OR REPLACE FUNCTION hot_rank(score numeric, published timestamp without time zone) | ||
RETURNS integer | ||
AS $$ | ||
BEGIN | ||
-- hours_diff:=EXTRACT(EPOCH FROM (timezone('utc',now()) - published))/3600 | ||
RETURN floor(10000 * log(greatest(1, score + 3)) / power(((EXTRACT(EPOCH FROM(timezone('utc', now()) - published)) / 3600) + 2), 1.8))::integer; | ||
END; | ||
$$ | ||
LANGUAGE plpgsql | ||
IMMUTABLE; | ||
|
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@@ -0,0 +1,16 @@ | ||
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; | ||
|