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Make hot rank not crash on future (#3517)

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* make hot rank zero for future

* parallel safe
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phiresky 2023-07-07 11:27:47 +02:00 committed by GitHub
parent b3dfc3721f
commit aa70325c11
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2 changed files with 27 additions and 0 deletions
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11
migrations/2023-07-06-151124_hot-rank-future/down.sql Normal file
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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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migrations/2023-07-06-151124_hot-rank-future/up.sql Normal file
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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;