MatrixSynapse/synapse/storage/schema/main/delta/58/19txn_id.sql

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1.6 KiB
SQL

/* Copyright 2020 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.
*/
-- A map of recent events persisted with transaction IDs. Used to deduplicate
-- send event requests with the same transaction ID.
--
-- Note: transaction IDs are scoped to the room ID/user ID/access token that was
-- used to make the request.
--
-- Note: The foreign key constraints are ON DELETE CASCADE, as if we delete the
-- events or access token we don't want to try and de-duplicate the event.
CREATE TABLE IF NOT EXISTS event_txn_id (
event_id TEXT NOT NULL,
room_id TEXT NOT NULL,
user_id TEXT NOT NULL,
token_id BIGINT NOT NULL,
txn_id TEXT NOT NULL,
inserted_ts BIGINT NOT NULL,
FOREIGN KEY (event_id)
REFERENCES events (event_id) ON DELETE CASCADE,
FOREIGN KEY (token_id)
REFERENCES access_tokens (id) ON DELETE CASCADE
);
CREATE UNIQUE INDEX IF NOT EXISTS event_txn_id_event_id ON event_txn_id(event_id);
CREATE UNIQUE INDEX IF NOT EXISTS event_txn_id_txn_id ON event_txn_id(room_id, user_id, token_id, txn_id);
CREATE INDEX IF NOT EXISTS event_txn_id_ts ON event_txn_id(inserted_ts);