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Change follow recommendation materialized view to be faster in most cases (#26545)

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Co-authored-by: Renaud Chaput <renchap@gmail.com>
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Claire 2023-08-18 18:20:55 +02:00 • committed by GitHub
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commit ee702e36e5
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5 changed files with 65 additions and 10 deletions
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32
db/views/global_follow_recommendations_v01.sql Normal file
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SELECT
account_id,
sum(rank) AS rank,
array_agg(reason) AS reason
FROM (
SELECT
account_summaries.account_id AS account_id,
count(follows.id) / (1.0 + count(follows.id)) AS rank,
'most_followed' AS reason
FROM follows
INNER JOIN account_summaries ON account_summaries.account_id = follows.target_account_id
INNER JOIN users ON users.account_id = follows.account_id
WHERE users.current_sign_in_at >= (now() - interval '30 days')
AND account_summaries.sensitive = 'f'
AND NOT EXISTS (SELECT 1 FROM follow_recommendation_suppressions WHERE follow_recommendation_suppressions.account_id = follows.target_account_id)
GROUP BY account_summaries.account_id
HAVING count(follows.id) >= 5
UNION ALL
SELECT account_summaries.account_id AS account_id,
sum(status_stats.reblogs_count + status_stats.favourites_count) / (1.0 + sum(status_stats.reblogs_count + status_stats.favourites_count)) AS rank,
'most_interactions' AS reason
FROM status_stats
INNER JOIN statuses ON statuses.id = status_stats.status_id
INNER JOIN account_summaries ON account_summaries.account_id = statuses.account_id
WHERE statuses.id >= ((date_part('epoch', now() - interval '30 days') * 1000)::bigint << 16)
AND account_summaries.sensitive = 'f'
AND NOT EXISTS (SELECT 1 FROM follow_recommendation_suppressions WHERE follow_recommendation_suppressions.account_id = statuses.account_id)
GROUP BY account_summaries.account_id
HAVING sum(status_stats.reblogs_count + status_stats.favourites_count) >= 5
) t0
GROUP BY account_id
ORDER BY rank DESC