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73 lines
2.9 KiB
SQL
73 lines
2.9 KiB
SQL
--
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-- This file is licensed under the Affero General Public License (AGPL) version 3.
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--
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-- Copyright (C) 2023 New Vector, Ltd
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU Affero General Public License as
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-- published by the Free Software Foundation, either version 3 of the
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-- License, or (at your option) any later version.
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--
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-- See the GNU Affero General Public License for more details:
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-- <https://www.gnu.org/licenses/agpl-3.0.html>.
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--
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-- Originally licensed under the Apache License, Version 2.0:
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-- <http://www.apache.org/licenses/LICENSE-2.0>.
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--
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-- [This file includes modifications made by New Vector Limited]
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--
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--
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/* Copyright 2023 The Matrix.org Foundation C.I.C
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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-- For MSC3970, in addition to the (room_id, user_id, token_id, txn_id) -> event_id mapping for each local event,
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-- we also store the (room_id, user_id, device_id, txn_id) -> event_id mapping.
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--
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-- This adds a new event_txn_id_device_id table.
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-- A map of recent events persisted with transaction IDs. Used to deduplicate
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-- send event requests with the same transaction ID.
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--
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-- Note: with MSC3970, transaction IDs are scoped to the
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-- room ID/user ID/device ID that was used to make the request.
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--
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-- Note: The foreign key constraints are ON DELETE CASCADE, as if we delete the
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-- event or device we don't want to try and de-duplicate the event.
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CREATE TABLE IF NOT EXISTS event_txn_id_device_id (
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event_id TEXT NOT NULL,
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room_id TEXT NOT NULL,
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user_id TEXT NOT NULL,
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device_id TEXT NOT NULL,
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txn_id TEXT NOT NULL,
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inserted_ts BIGINT NOT NULL,
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FOREIGN KEY (event_id)
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REFERENCES events (event_id) ON DELETE CASCADE,
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FOREIGN KEY (user_id, device_id)
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REFERENCES devices (user_id, device_id) ON DELETE CASCADE
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);
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-- This ensures that there is only one mapping per event_id.
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CREATE UNIQUE INDEX IF NOT EXISTS event_txn_id_device_id_event_id
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ON event_txn_id_device_id(event_id);
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-- This ensures that there is only one mapping per (room_id, user_id, device_id, txn_id) tuple.
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-- Events are usually looked up using this index.
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CREATE UNIQUE INDEX IF NOT EXISTS event_txn_id_device_id_txn_id
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ON event_txn_id_device_id(room_id, user_id, device_id, txn_id);
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-- This table is cleaned up regularly, removing the oldest entries, hence this index.
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CREATE INDEX IF NOT EXISTS event_txn_id_device_id_ts
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ON event_txn_id_device_id(inserted_ts);
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