Big Data in Real Time at Twitter
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Nick Kallen is a Systems Engineer at Twitter. He is the author of Arel, NamedScope, Cache Money, and Screw.Unit, and co-creator of FlockDb, Twitter's distributed graph database.
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Wrong query?
by
José González D'Amico
In your timeline you see your friends' (AKA followees) tweets, not your followers'. And if I remember correctly, in the Twitter API source_id is a field of Tweets, not of Friends.
Perhaps the query should be this?
SELECT * FROM tweets
WHERE source_id IN
(SELECT user_id
FROM friends
WHERE destination_id = ?)
ORDER BY created_at DESC
LIMIT 20
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