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26 lines
833 B
PL/PgSQL
26 lines
833 B
PL/PgSQL
-- Rank = ScaleFactor * sign(Score) * log(1 + abs(Score)) / (Time + 2)^Gravity
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create or replace function hot_rank(
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score numeric,
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published timestamp without time zone)
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returns integer as $$
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begin
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-- hours_diff:=EXTRACT(EPOCH FROM (timezone('utc',now()) - published))/3600
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return floor(10000*log(greatest(1,score+3)) / power(((EXTRACT(EPOCH FROM (timezone('utc',now()) - published))/3600) + 2), 1.8))::integer;
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end; $$
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LANGUAGE plpgsql;
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drop index
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idx_post_published,
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idx_post_stickied,
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idx_post_aggregates_hot,
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idx_post_aggregates_active,
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idx_post_aggregates_score,
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idx_comment_published,
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idx_comment_aggregates_hot,
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idx_comment_aggregates_score,
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idx_user_published,
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idx_user_aggregates_comment_score,
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idx_community_published,
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idx_community_aggregates_hot,
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idx_community_aggregates_subscribers;
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