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Fix deletion of old sent devices correctly

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This commit is contained in:
Erik Johnston 2017-01-31 13:22:41 +00:00
parent d3169e8d28
commit ab55794b6f
1 changed files with 17 additions and 5 deletions
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22
synapse/storage/devices.py
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@ -436,15 +436,27 @@ class DeviceStore(SQLBaseStore):
)
def _mark_as_sent_devices_by_remote_txn(self, txn, destination, stream_id):
# First we DELETE all rows such that only the latest row for each
# (destination, user_id is left. We do this by selecting first and
# deleting.
sql = """
SELECT user_id, coalesce(max(stream_id), 0) FROM device_lists_outbound_pokes
WHERE destination = ? AND stream_id <= ?
GROUP BY user_id
HAVING count(*) > 1
"""
txn.execute(sql, (destination, stream_id,))
rows = txn.fetchall()
sql = """
DELETE FROM device_lists_outbound_pokes
WHERE destination = ? AND stream_id < (
SELECT coalesce(max(stream_id), 0) FROM device_lists_outbound_pokes
WHERE destination = ? AND stream_id <= ?
)
WHERE destination = ? AND user_id = ? AND stream_id < ?
"""
txn.execute(sql, (destination, destination, stream_id,))
txn.executemany(
sql, ((destination, row[0], row[1],) for row in rows)
)
# Mark everything that is left as sent
sql = """
UPDATE device_lists_outbound_pokes SET sent = ?
WHERE destination = ? AND stream_id <= ?