diff options
Diffstat (limited to 'synapse/storage/databases')
| -rw-r--r-- | synapse/storage/databases/main/stream.py | 26 |
1 files changed, 11 insertions, 15 deletions
diff --git a/synapse/storage/databases/main/stream.py b/synapse/storage/databases/main/stream.py index 793e906630..4e1d9647b7 100644 --- a/synapse/storage/databases/main/stream.py +++ b/synapse/storage/databases/main/stream.py @@ -785,22 +785,14 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore): return None async def get_current_room_stream_token_for_room_id( - self, room_id: Optional[str] = None + self, room_id: str ) -> RoomStreamToken: - """Returns the current position of the rooms stream. - - By default, it returns a live token with the current global stream - token. Specifying a `room_id` causes it to return a historic token with - the room specific topological token. - """ + """Returns the current position of the rooms stream (historic token).""" stream_ordering = self.get_room_max_stream_ordering() - if room_id is None: - return RoomStreamToken(None, stream_ordering) - else: - topo = await self.db_pool.runInteraction( - "_get_max_topological_txn", self._get_max_topological_txn, room_id - ) - return RoomStreamToken(topo, stream_ordering) + topo = await self.db_pool.runInteraction( + "_get_max_topological_txn", self._get_max_topological_txn, room_id + ) + return RoomStreamToken(topo, stream_ordering) def get_stream_id_for_event_txn( self, @@ -870,7 +862,11 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore): ) rows = txn.fetchall() - return rows[0][0] if rows else 0 + # An aggregate function like MAX() will always return one row per group + # so we can safely rely on the lookup here. For example, when a we + # lookup a `room_id` which does not exist, `rows` will look like + # `[(None,)]` + return rows[0][0] if rows[0][0] is not None else 0 @staticmethod def _set_before_and_after( |