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https://github.com/whippyshou/mastodon
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d9ae3db8d5
Express follow_recommendations in terms of account_summaries rather than accounts, integrate filters that are unconditionally used, and materialize the resulting view. This should result in the bulk of the computation being performed only once instead of **once per recommendation language**.
35 lines
1.5 KiB
SQL
35 lines
1.5 KiB
SQL
SELECT
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account_id,
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sum(rank) AS rank,
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array_agg(reason) AS reason
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FROM (
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SELECT
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account_summaries.account_id AS account_id,
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count(follows.id) / (1.0 + count(follows.id)) AS rank,
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'most_followed' AS reason
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FROM follows
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INNER JOIN account_summaries ON account_summaries.account_id = follows.target_account_id
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INNER JOIN users ON users.account_id = follows.account_id
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LEFT OUTER JOIN follow_recommendation_suppressions ON follow_recommendation_suppressions.account_id = follows.target_account_id
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WHERE users.current_sign_in_at >= (now() - interval '30 days')
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AND account_summaries.sensitive = 'f'
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AND follow_recommendation_suppressions.id IS NULL
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GROUP BY account_summaries.account_id
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HAVING count(follows.id) >= 5
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UNION ALL
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SELECT account_summaries.account_id AS account_id,
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sum(reblogs_count + favourites_count) / (1.0 + sum(reblogs_count + favourites_count)) AS rank,
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'most_interactions' AS reason
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FROM status_stats
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INNER JOIN statuses ON statuses.id = status_stats.status_id
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INNER JOIN account_summaries ON account_summaries.account_id = statuses.account_id
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LEFT OUTER JOIN follow_recommendation_suppressions ON follow_recommendation_suppressions.account_id = statuses.account_id
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WHERE statuses.id >= ((date_part('epoch', now() - interval '30 days') * 1000)::bigint << 16)
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AND account_summaries.sensitive = 'f'
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AND follow_recommendation_suppressions.id IS NULL
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GROUP BY account_summaries.account_id
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HAVING sum(reblogs_count + favourites_count) >= 5
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) t0
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GROUP BY account_id
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ORDER BY rank DESC
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