MatrixSynapse/synapse/storage/schema/delta/36/readd_public_rooms.sql

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/* Copyright 2016 OpenMarket 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.
*/
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-- Re-add some entries to stream_ordering_to_exterm that were incorrectly deleted
INSERT INTO stream_ordering_to_exterm (stream_ordering, room_id, event_id)
SELECT
(SELECT stream_ordering FROM events where event_id = e.event_id) AS stream_ordering,
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room_id,
event_id
FROM event_forward_extremities AS e
WHERE NOT EXISTS (
SELECT room_id FROM stream_ordering_to_exterm AS s
WHERE s.room_id = e.room_id
);