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103 lines
2.7 KiB
PL/PgSQL
103 lines
2.7 KiB
PL/PgSQL
DROP FUNCTION scaled_rank;
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ALTER TABLE community_aggregates
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ALTER COLUMN hot_rank TYPE integer,
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ALTER COLUMN hot_rank SET DEFAULT 1728;
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ALTER TABLE comment_aggregates
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ALTER COLUMN hot_rank TYPE integer,
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ALTER COLUMN hot_rank SET DEFAULT 1728;
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ALTER TABLE post_aggregates
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ALTER COLUMN hot_rank TYPE integer,
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ALTER COLUMN hot_rank SET DEFAULT 1728,
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ALTER COLUMN hot_rank_active TYPE integer,
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ALTER COLUMN hot_rank_active SET DEFAULT 1728;
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-- Change back to integer version
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DROP FUNCTION hot_rank (numeric, published timestamp with time zone);
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CREATE OR REPLACE FUNCTION hot_rank (score numeric, published timestamp with time zone)
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RETURNS integer
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AS $$
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DECLARE
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hours_diff numeric := EXTRACT(EPOCH FROM (now() - published)) / 3600;
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BEGIN
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IF (hours_diff > 0) THEN
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RETURN floor(10000 * log(greatest (1, score + 3)) / power((hours_diff + 2), 1.8))::integer;
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ELSE
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-- if the post is from the future, set hot score to 0. otherwise you can game the post to
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-- always be on top even with only 1 vote by setting it to the future
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RETURN 0;
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END IF;
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END;
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$$
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LANGUAGE plpgsql
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IMMUTABLE PARALLEL SAFE;
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ALTER TABLE post_aggregates
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DROP COLUMN scaled_rank;
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-- The following code is necessary because postgres can't remove
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-- a single enum value.
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ALTER TABLE local_user
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ALTER default_sort_type DROP DEFAULT;
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UPDATE
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local_user
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SET
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default_sort_type = 'Hot'
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WHERE
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default_sort_type = 'Scaled';
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-- rename the old enum
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ALTER TYPE sort_type_enum RENAME TO sort_type_enum__;
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-- create the new enum
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CREATE TYPE sort_type_enum AS ENUM (
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'Active',
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'Hot',
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'New',
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'Old',
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'TopDay',
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'TopWeek',
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'TopMonth',
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'TopYear',
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'TopAll',
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'MostComments',
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'NewComments',
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'TopHour',
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'TopSixHour',
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'TopTwelveHour',
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'TopThreeMonths',
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'TopSixMonths',
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'TopNineMonths'
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);
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-- alter all your enum columns
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ALTER TABLE local_user
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ALTER COLUMN default_sort_type TYPE sort_type_enum
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USING default_sort_type::text::sort_type_enum;
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ALTER TABLE local_user
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ALTER default_sort_type SET DEFAULT 'Active';
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-- drop the old enum
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DROP TYPE sort_type_enum__;
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-- Remove int to float conversions that were automatically added to index filters
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DROP INDEX idx_comment_aggregates_nonzero_hotrank, idx_community_aggregates_nonzero_hotrank, idx_post_aggregates_nonzero_hotrank;
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CREATE INDEX idx_community_aggregates_nonzero_hotrank ON community_aggregates (published)
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WHERE
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hot_rank != 0;
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CREATE INDEX idx_comment_aggregates_nonzero_hotrank ON comment_aggregates (published)
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WHERE
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hot_rank != 0;
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CREATE INDEX idx_post_aggregates_nonzero_hotrank ON post_aggregates (published DESC)
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WHERE
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hot_rank != 0 OR hot_rank_active != 0;
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