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Use most recently added binding, not most recently seen user.

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This commit is contained in:
Erik Johnston 2016-10-27 14:32:45 +01:00
parent 1fc1bc2a51
commit a9111786f9
1 changed files with 11 additions and 19 deletions
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30
synapse/storage/schema/delta/37/user_threepids.sql
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@ -24,31 +24,23 @@
SET medium = 'email_old'
WHERE medium = 'email'
AND address IN (
-- `user_last_seen` maps user_ids to the last time we saw them
WITH user_last_seen AS (
SELECT user_id, max(last_seen) AS ts FROM user_ips GROUP BY user_id
),
-- `duplicate_addresses` is a table of all the email addresses that
-- appear multiple times and the most recently we saw any of their users
duplicate_addresses AS (
SELECT lower(u1.address) AS address, max(ts.ts) AS max_ts
FROM user_threepids AS u1
INNER JOIN user_threepids AS u2 ON u1.medium = u2.medium AND lower(u1.address) = lower(u2.address) AND u1.address != u2.address
INNER JOIN user_last_seen as ts ON ts.user_id = u1.user_id
WHERE u1.medium = 'email' AND u2.medium = 'email'
GROUP BY lower(u1.address)
)
-- We select all the addresses that are linked to the user_id that is NOT
-- the most recently seen.
-- the most recently created.
SELECT u.address
FROM
user_threepids AS u,
duplicate_addresses,
user_last_seen AS ts
-- `duplicate_addresses` is a table of all the email addresses that
-- appear multiple times and when the binding was created
(
SELECT lower(u1.address) AS address, max(u1.added_at) AS max_ts
FROM user_threepids AS u1
INNER JOIN user_threepids AS u2 ON u1.medium = u2.medium AND lower(u1.address) = lower(u2.address) AND u1.address != u2.address
WHERE u1.medium = 'email' AND u2.medium = 'email'
GROUP BY lower(u1.address)
) AS duplicate_addresses
WHERE
lower(u.address) = duplicate_addresses.address
AND u.user_id = ts.user_id
AND ts.ts != max_ts -- NOT the most recently used
AND u.added_at != max_ts -- NOT the most recently created
);