diff options
| -rw-r--r-- | synapse/storage/roommember.py | 43 | ||||
| -rw-r--r-- | synapse/storage/schema/delta/56/room_membership_idx.sql | 25 |
2 files changed, 68 insertions, 0 deletions
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py index b3c002b9eb..bc77705e97 100644 --- a/synapse/storage/roommember.py +++ b/synapse/storage/roommember.py @@ -639,6 +639,39 @@ class RoomMemberWorkerStore(EventsWorkerStore): count = yield self.runInteraction("did_forget_membership", f) defer.returnValue(count == 0) + @cached() + def get_forgotten_rooms_for_user(self, user_id): + """Gets all rooms the user has forgotten. + + Args: + user_id (str) + + Returns: + Deferred[set[str]] + """ + + def _get_forgotten_rooms_for_user_txn(txn): + # This is a slightly convoluted query that first looks up all rooms + # that the user has forgotten in the past, then rechecks that list + # to see if any have subsequently been updated. This is done so that + # we can use a partial index on `forgotten = 1` on the assumption + # that few users will actually forget many rooms. + sql = """ + SELECT room_id, ( + SELECT count(*) FROM room_memberships + WHERE room_id = m.room_id AND user_id = m.user_id AND forgotten = 0 + ) AS count + FROM room_memberships AS m + WHERE user_id = ? AND forgotten = 1 + GROUP BY room_id, user_id; + """ + txn.execute(sql, (user_id,)) + return set(row[0] for row in txn if row[1] == 0) + + return self.runInteraction( + "get_forgotten_rooms_for_user", _get_forgotten_rooms_for_user_txn + ) + @defer.inlineCallbacks def get_rooms_user_has_been_in(self, user_id): """Get all rooms that the user has ever been in. @@ -670,6 +703,13 @@ class RoomMemberStore(RoomMemberWorkerStore): _CURRENT_STATE_MEMBERSHIP_UPDATE_NAME, self._background_current_state_membership, ) + self.register_background_index_update( + "room_membership_forgotten_idx", + index_name="room_memberships_user_room_forgotten", + table="room_memberships", + columns=["user_id", "room_id"], + where_clause="forgotten = 1", + ) def _store_room_members_txn(self, txn, events, backfilled): """Store a room member in the database. @@ -771,6 +811,9 @@ class RoomMemberStore(RoomMemberWorkerStore): txn.execute(sql, (user_id, room_id)) self._invalidate_cache_and_stream(txn, self.did_forget, (user_id, room_id)) + self._invalidate_cache_and_stream( + txn, self.get_forgotten_rooms_for_user, (user_id,) + ) return self.runInteraction("forget_membership", f) diff --git a/synapse/storage/schema/delta/56/room_membership_idx.sql b/synapse/storage/schema/delta/56/room_membership_idx.sql new file mode 100644 index 0000000000..fc0b498843 --- /dev/null +++ b/synapse/storage/schema/delta/56/room_membership_idx.sql @@ -0,0 +1,25 @@ +/* Copyright 2019 The Matrix.org Foundation C.I.C. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +-- We add membership to current state so that we don't need to join against +-- room_memberships, which can be surprisingly costly (we do such queries +-- very frequently). +-- This will be null for non-membership events and the content.membership key +-- for membership events. (Will also be null for membership events until the +-- background update job has finished). + +-- Adds an index on room_memberships for fetching all forgotten rooms for a user +INSERT INTO background_updates (update_name, progress_json) VALUES + ('room_membership_forgotten_idx', '{}'); |