diff options
Diffstat (limited to 'synapse/storage/schema/main/delta/57/local_current_membership.py')
-rw-r--r-- | synapse/storage/schema/main/delta/57/local_current_membership.py | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/synapse/storage/schema/main/delta/57/local_current_membership.py b/synapse/storage/schema/main/delta/57/local_current_membership.py new file mode 100644 index 00000000..66989222 --- /dev/null +++ b/synapse/storage/schema/main/delta/57/local_current_membership.py @@ -0,0 +1,96 @@ +# Copyright 2020 New Vector Ltd +# +# 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 create a new table called `local_current_membership` that stores the latest +# membership state of local users in rooms, which helps track leaves/bans/etc +# even if the server has left the room (and so has deleted the room from +# `current_state_events`). This will also include outstanding invites for local +# users for rooms the server isn't in. +# +# If the server isn't and hasn't been in the room then it will only include +# outsstanding invites, and not e.g. pre-emptive bans of local users. +# +# If the server later rejoins a room `local_current_membership` can simply be +# replaced with the new current state of the room (which results in the +# equivalent behaviour as if the server had remained in the room). + + +def run_upgrade(cur, database_engine, config, *args, **kwargs): + # We need to do the insert in `run_upgrade` section as we don't have access + # to `config` in `run_create`. + + # This upgrade may take a bit of time for large servers (e.g. one minute for + # matrix.org) but means we avoid a lots of book keeping required to do it as + # a background update. + + # We check if the `current_state_events.membership` is up to date by + # checking if the relevant background update has finished. If it has + # finished we can avoid doing a join against `room_memberships`, which + # speesd things up. + cur.execute( + """SELECT 1 FROM background_updates + WHERE update_name = 'current_state_events_membership' + """ + ) + current_state_membership_up_to_date = not bool(cur.fetchone()) + + # Cheekily drop and recreate indices, as that is faster. + cur.execute("DROP INDEX local_current_membership_idx") + cur.execute("DROP INDEX local_current_membership_room_idx") + + if current_state_membership_up_to_date: + sql = """ + INSERT INTO local_current_membership (room_id, user_id, event_id, membership) + SELECT c.room_id, state_key AS user_id, event_id, c.membership + FROM current_state_events AS c + WHERE type = 'm.room.member' AND c.membership IS NOT NULL AND state_key LIKE ? + """ + else: + # We can't rely on the membership column, so we need to join against + # `room_memberships`. + sql = """ + INSERT INTO local_current_membership (room_id, user_id, event_id, membership) + SELECT c.room_id, state_key AS user_id, event_id, r.membership + FROM current_state_events AS c + INNER JOIN room_memberships AS r USING (event_id) + WHERE type = 'm.room.member' AND state_key LIKE ? + """ + cur.execute(sql, ("%:" + config.server_name,)) + + cur.execute( + "CREATE UNIQUE INDEX local_current_membership_idx ON local_current_membership(user_id, room_id)" + ) + cur.execute( + "CREATE INDEX local_current_membership_room_idx ON local_current_membership(room_id)" + ) + + +def run_create(cur, database_engine, *args, **kwargs): + cur.execute( + """ + CREATE TABLE local_current_membership ( + room_id TEXT NOT NULL, + user_id TEXT NOT NULL, + event_id TEXT NOT NULL, + membership TEXT NOT NULL + )""" + ) + + cur.execute( + "CREATE UNIQUE INDEX local_current_membership_idx ON local_current_membership(user_id, room_id)" + ) + cur.execute( + "CREATE INDEX local_current_membership_room_idx ON local_current_membership(room_id)" + ) |