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https://github.com/sigmasternchen/mobmash.click
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feat: Redo of rating view
Turned out: Postgres doesn't like CTEs referring to itself in recursive subqueries very much.
This commit is contained in:
overflowerror
parent
7186ed25e9
commit
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1 changed files with 102 additions and 90 deletions
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@ -40,98 +40,110 @@ SELECT mm_matches.id,
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mm_matches.session
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FROM mm_matches;
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CREATE VIEW mm_rating(mob, rating, last_update) AS
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WITH RECURSIVE rating(mob, rating, last_update) AS (
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SELECT mm_mobs.id AS mob,
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1500.0 AS rating,
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0::bigint AS last_update
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FROM mm_mobs
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UNION
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SELECT expectation.mob,
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expectation.own_rating + 32::numeric * (
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CASE
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WHEN expectation.won THEN 1
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ELSE 0
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END::numeric - expectation.expectation) AS rating,
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expectation.id AS last_update
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FROM (
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WITH newest_rating(mob, rating, last_update) AS (
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SELECT
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rating_with_row_number.mob,
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rating_with_row_number.rating,
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rating_with_row_number.last_update,
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rating_with_row_number.row_number
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FROM (
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SELECT rating_for_row_number.mob,
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rating_for_row_number.rating,
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rating_for_row_number.last_update,
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row_number()
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OVER (
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PARTITION BY rating_for_row_number.mob
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ORDER BY rating_for_row_number.last_update DESC
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) AS row_number
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FROM rating rating_for_row_number
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) rating_with_row_number
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WHERE rating_with_row_number.row_number = 1)
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CREATE VIEW mm_current_rating(mob, rating) AS
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WITH RECURSIVE ratings_history (ratings, last_update) AS (
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SELECT
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next_match.id,
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mm_matches_of_mob.mob,
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mm_matches_of_mob.won,
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own_rating.rating AS own_rating,
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opponent_rating.rating AS opponent_rating,
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(1::numeric /
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(
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1::numeric +
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power(
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10::numeric,
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(
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opponent_rating.rating - own_rating.rating
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) / 400::numeric
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)
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)
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) AS expectation
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FROM (
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jsonb_object_agg(id, start_value) AS ratings,
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0::bigint AS last_update
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FROM mm_mobs
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CROSS JOIN
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(
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SELECT
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min(matches_for_next_match.id) AS id,
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matches_for_next_match.mob
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FROM mm_matches_of_mob matches_for_next_match
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JOIN newest_rating own_rating_1
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ON matches_for_next_match.mob = own_rating_1.mob
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WHERE matches_for_next_match.id > own_rating_1.last_update
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GROUP BY matches_for_next_match.mob
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) next_match
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JOIN mm_matches_of_mob
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ON next_match.id = mm_matches_of_mob.id AND
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next_match.mob = mm_matches_of_mob.mob
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JOIN newest_rating own_rating
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ON mm_matches_of_mob.mob = own_rating.mob
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JOIN newest_rating opponent_rating
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ON mm_matches_of_mob.opponent = opponent_rating.mob
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) expectation
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1500 AS start_value
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) AS start_value
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WHERE enabled
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UNION ALL
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SELECT
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jsonb_set(
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jsonb_set(
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ratings,
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ARRAY[mob1::text],
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to_jsonb(mob1rating)
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),
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ARRAY[mob2::text],
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to_jsonb(mob2rating)
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) AS ratings,
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next_match AS last_update
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FROM
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(
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SELECT
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next_match,
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ratings,
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mob1,
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mob2,
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winner,
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mob1rating + 32::numeric * (
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CASE
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WHEN winner = 1 THEN 1
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ELSE 0
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END::numeric - expectation
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) AS mob1rating,
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mob2rating + 32::numeric * (
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CASE
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WHEN winner = 2 THEN 1
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ELSE 0
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END::numeric - expectation
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) AS mob2rating
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FROM
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(
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SELECT
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next_match,
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ratings,
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mob1,
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mob2,
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winner,
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mob1rating,
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mob2rating,
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(1::numeric /
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(1::numeric + power(
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10::numeric,
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(mob1rating - mob2rating) / 400::numeric
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))
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) AS expectation
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FROM
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(
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SELECT
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next_match.id AS next_match,
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next_match.ratings AS ratings,
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mm_matches.mob1fk AS mob1,
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mm_matches.mob2fk AS mob2,
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mm_matches.winner AS winner,
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cast(next_match.ratings->cast(mm_matches.mob2fk AS varchar) AS numeric) AS mob1rating,
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cast(next_match.ratings->cast(mm_matches.mob1fk AS varchar) AS numeric) AS mob2rating
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FROM
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(
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SELECT
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mm_matches.id,
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ratings_history.ratings
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FROM ratings_history
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CROSS JOIN mm_matches
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INNER JOIN mm_mobs AS mob
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ON mob.id = mm_matches.mob1fk
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INNER JOIN mm_mobs AS opponent
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ON opponent.id = mm_matches.mob1fk
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WHERE mm_matches.id > ratings_history.last_update
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AND mob.enabled
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AND opponent.enabled
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ORDER BY mm_matches.id ASC
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LIMIT 1
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) AS next_match
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INNER JOIN mm_matches
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ON mm_matches.id = next_match.id
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) AS match_with_ratings
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) AS expectation
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) AS new_ratings
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)
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SELECT mob,
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rating,
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last_update
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FROM rating;
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CREATE VIEW mm_current_rating(mob, rating, last_update) AS
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SELECT mob,
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rating,
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last_update
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FROM mm_rating
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WHERE last_update = (
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SELECT
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cast(key as numeric) as mob,
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cast(value as numeric) as rating
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FROM jsonb_each(
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(
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SELECT max(matches_with_default.id) AS max
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FROM (
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SELECT
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mm_matches_of_mob.id,
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mm_matches_of_mob.mob
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FROM mm_matches_of_mob
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UNION
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SELECT
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0,
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mm_rating.mob
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) matches_with_default
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WHERE matches_with_default.mob = mm_rating.mob
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SELECT
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ratings
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FROM ratings_history
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WHERE last_update = (
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SELECT max(last_update)
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FROM ratings_history
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)
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)
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);
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);
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