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Implement MSC2326 (label based filtering)
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Implement label-based filtering on `/sync` and `/messages` ([MSC2326](https://github.com/matrix-org/matrix-doc/pull/2326)). |
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synapse/storage/data_stores/main/schema/delta/56/event_labels.sql
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/* Copyright 2019 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. | ||
*/ | ||
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-- room_id and topoligical_ordering are denormalised from the events table in order to | ||
-- make the index work. | ||
CREATE TABLE IF NOT EXISTS event_labels ( | ||
event_id TEXT, | ||
label TEXT, | ||
room_id TEXT NOT NULL, | ||
topological_ordering BIGINT NOT NULL, | ||
PRIMARY KEY(event_id, label) | ||
); | ||
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-- This index enables an event pagination looking for a particular label to index the | ||
-- event_labels table first, which is much quicker than scanning the events table and then | ||
-- filtering by label, if the label is rarely used relative to the size of the room. | ||
CREATE INDEX event_labels_room_id_label_idx ON event_labels(room_id, label, topological_ordering); |
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