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Don't invalidate all get_relations_for_event
on history purge (#17083)
This is a tree cache already, so may as well move the room ID to the front and use that
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changelog.d/17083.misc
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1
changelog.d/17083.misc
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@ -0,0 +1 @@
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Improve DB usage when fetching related events.
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@ -393,9 +393,9 @@ class RelationsHandler:
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# Attempt to find another event to use as the latest event.
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potential_events, _ = await self._main_store.get_relations_for_event(
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room_id,
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event_id,
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event,
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room_id,
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RelationTypes.THREAD,
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direction=Direction.FORWARDS,
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)
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@ -318,7 +318,13 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
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self._invalidate_local_get_event_cache(redacts) # type: ignore[attr-defined]
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# Caches which might leak edits must be invalidated for the event being
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# redacted.
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self._attempt_to_invalidate_cache("get_relations_for_event", (redacts,))
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self._attempt_to_invalidate_cache(
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"get_relations_for_event",
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(
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room_id,
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redacts,
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),
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)
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self._attempt_to_invalidate_cache("get_applicable_edit", (redacts,))
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self._attempt_to_invalidate_cache("get_thread_id", (redacts,))
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self._attempt_to_invalidate_cache("get_thread_id_for_receipts", (redacts,))
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@ -345,7 +351,13 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
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)
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if relates_to:
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self._attempt_to_invalidate_cache("get_relations_for_event", (relates_to,))
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self._attempt_to_invalidate_cache(
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"get_relations_for_event",
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(
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room_id,
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relates_to,
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),
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)
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self._attempt_to_invalidate_cache("get_references_for_event", (relates_to,))
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self._attempt_to_invalidate_cache("get_applicable_edit", (relates_to,))
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self._attempt_to_invalidate_cache("get_thread_summary", (relates_to,))
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@ -380,9 +392,9 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
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self._attempt_to_invalidate_cache(
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"get_unread_event_push_actions_by_room_for_user", (room_id,)
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)
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self._attempt_to_invalidate_cache("get_relations_for_event", (room_id,))
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self._attempt_to_invalidate_cache("_get_membership_from_event_id", None)
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self._attempt_to_invalidate_cache("get_relations_for_event", None)
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self._attempt_to_invalidate_cache("get_applicable_edit", None)
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self._attempt_to_invalidate_cache("get_thread_id", None)
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self._attempt_to_invalidate_cache("get_thread_id_for_receipts", None)
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@ -1923,7 +1923,12 @@ class PersistEventsStore:
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# Any relation information for the related event must be cleared.
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self.store._invalidate_cache_and_stream(
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txn, self.store.get_relations_for_event, (redacted_relates_to,)
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txn,
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self.store.get_relations_for_event,
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(
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room_id,
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redacted_relates_to,
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),
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)
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if rel_type == RelationTypes.REFERENCE:
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self.store._invalidate_cache_and_stream(
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@ -1181,7 +1181,7 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
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results = list(txn)
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# (event_id, parent_id, rel_type) for each relation
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relations_to_insert: List[Tuple[str, str, str]] = []
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relations_to_insert: List[Tuple[str, str, str, str]] = []
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for event_id, event_json_raw in results:
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try:
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event_json = db_to_json(event_json_raw)
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@ -1214,7 +1214,8 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
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if not isinstance(parent_id, str):
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continue
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relations_to_insert.append((event_id, parent_id, rel_type))
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room_id = event_json["room_id"]
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relations_to_insert.append((room_id, event_id, parent_id, rel_type))
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# Insert the missing data, note that we upsert here in case the event
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# has already been processed.
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@ -1223,18 +1224,27 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
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txn=txn,
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table="event_relations",
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key_names=("event_id",),
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key_values=[(r[0],) for r in relations_to_insert],
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key_values=[(r[1],) for r in relations_to_insert],
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value_names=("relates_to_id", "relation_type"),
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value_values=[r[1:] for r in relations_to_insert],
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value_values=[r[2:] for r in relations_to_insert],
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)
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# Iterate the parent IDs and invalidate caches.
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cache_tuples = {(r[1],) for r in relations_to_insert}
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self._invalidate_cache_and_stream_bulk( # type: ignore[attr-defined]
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txn, self.get_relations_for_event, cache_tuples # type: ignore[attr-defined]
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txn,
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self.get_relations_for_event, # type: ignore[attr-defined]
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{
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(
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r[0], # room_id
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r[2], # parent_id
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)
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for r in relations_to_insert
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},
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)
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self._invalidate_cache_and_stream_bulk( # type: ignore[attr-defined]
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txn, self.get_thread_summary, cache_tuples # type: ignore[attr-defined]
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txn,
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self.get_thread_summary, # type: ignore[attr-defined]
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{(r[1],) for r in relations_to_insert},
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)
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if results:
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@ -169,9 +169,9 @@ class RelationsWorkerStore(SQLBaseStore):
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@cached(uncached_args=("event",), tree=True)
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async def get_relations_for_event(
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self,
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room_id: str,
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event_id: str,
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event: EventBase,
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room_id: str,
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relation_type: Optional[str] = None,
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event_type: Optional[str] = None,
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limit: int = 5,
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