MatrixSynapse/synapse/storage/schema/main/delta/72/07thread_receipts.sql.postgres

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/* Copyright 2022 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.
*/
-- Add a nullable column for thread ID to the receipts table; this allows a
-- receipt per user, per room, as well as an unthreaded receipt (corresponding
-- to a null thread ID).
ALTER TABLE receipts_linearized ADD COLUMN thread_id TEXT;
ALTER TABLE receipts_graph ADD COLUMN thread_id TEXT;
-- Rebuild the unique constraint with the thread_id.
ALTER TABLE receipts_linearized
ADD CONSTRAINT receipts_linearized_uniqueness_thread
UNIQUE (room_id, receipt_type, user_id, thread_id);
ALTER TABLE receipts_graph
ADD CONSTRAINT receipts_graph_uniqueness_thread
UNIQUE (room_id, receipt_type, user_id, thread_id);