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Switch INSERT + UPDATE to UPSERT

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This commit is contained in:
Andrew Morgan 2019-11-18 17:47:41 +00:00
parent 657d614f6a
commit 1d9b29190b
1 changed files with 8 additions and 14 deletions
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22
synapse/storage/data_stores/main/deviceinbox.py
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@ -359,20 +359,14 @@ class DeviceInboxStore(DeviceInboxWorkerStore, DeviceInboxBackgroundUpdateStore)
self, txn, stream_id, messages_by_user_then_device
):
# Compatible method of performing an upsert
sql = "SELECT stream_id FROM device_max_stream_id"
txn.execute(sql)
rows = txn.fetchone()
if rows:
db_stream_id = rows[0]
if db_stream_id < stream_id:
# Insert the new stream_id
sql = "UPDATE device_max_stream_id SET stream_id = ?"
else:
# No rows, perform an insert
sql = "INSERT INTO device_max_stream_id (stream_id) VALUES (?)"
txn.execute(sql, (stream_id,))
sql = """
INSERT INTO device_max_stream_id
(stream_id) VALUES (?)
ON CONFLICT DO UPDATE device_max_stream_id
SET stream_id = ?
WHERE stream_id < ?
"""
txn.execute(sql, (stream_id, stream_id))
local_by_user_then_device = {}
for user_id, messages_by_device in messages_by_user_then_device.items():