fedi/lemmy
1
0
Fork 0
mirror of https://github.com/LemmyNet/lemmy.git synced 2024-11-21 22:27:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

Make hot rank not crash on future (#3517)

Browse source 
* make hot rank zero for future

* parallel safe
This commit is contained in:
phiresky 2023-07-07 11:27:47 +02:00 committed by GitHub
parent b3dfc3721f
commit aa70325c11
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
migrations/2023-07-06-151124_hot-rank-future/down.sql Normal file
View file

@ -0,0 +1,11 @@
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;

16
migrations/2023-07-06-151124_hot-rank-future/up.sql Normal file
View file

@ -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 PARALLEL SAFE;