A social RSS reader built on the AT Protocol.
glean.at
glean
atproto
atmosphere
rss
feed
social
app
Optimize recommendation query and remove unnecessary migration
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-14
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-7
internal/cluster/jaccard.go
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-7
internal/cluster/jaccard.go
···
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_, err = tx.ExecContext(ctx, `
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INSERT INTO user_article_recommendations (user_did, feed_url, article_url, score)
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SELECT target, l.feed_url, l.article_url, SUM(us.jaccard) AS score
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SELECT targets.target, l.feed_url, l.article_url, SUM(targets.jaccard) AS score
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FROM (
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SELECT us.user_a AS target, s.user_did AS peer
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SELECT us.user_a AS target, us.user_b AS peer, us.jaccard
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FROM user_similarity us
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WHERE us.jaccard > 0.2
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UNION ALL
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SELECT us.user_b AS target, s.user_did AS peer
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SELECT us.user_b AS target, us.user_a AS peer, us.jaccard
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FROM user_similarity us
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WHERE us.jaccard > 0.2
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) targets
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JOIN likes l ON l.author_did = targets.peer
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WHERE l.article_url NOT IN (
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SELECT a.url FROM articles a
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JOIN subscriptions s ON a.feed_url = s.feed_url AND s.user_did = targets.target
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LEFT JOIN read_state r ON r.user_did = targets.target AND r.article_id = a.id
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WHERE NOT EXISTS (
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SELECT 1 FROM subscriptions sub WHERE sub.user_did = targets.target AND sub.feed_url = l.feed_url
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)
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AND NOT EXISTS (
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SELECT 1 FROM likes ul WHERE ul.author_did = targets.target AND ul.feed_url = l.feed_url AND ul.article_url = l.article_url