31 lines
1.2 KiB
MySQL
31 lines
1.2 KiB
MySQL
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/* Copyright 2019 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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-- room_id and topological_ordering are denormalised from the events table in order to
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-- make the index work.
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CREATE TABLE IF NOT EXISTS event_labels (
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event_id TEXT,
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label TEXT,
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room_id TEXT NOT NULL,
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topological_ordering BIGINT NOT NULL,
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PRIMARY KEY(event_id, label)
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);
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-- This index enables an event pagination looking for a particular label to index the
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-- event_labels table first, which is much quicker than scanning the events table and then
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-- filtering by label, if the label is rarely used relative to the size of the room.
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CREATE INDEX event_labels_room_id_label_idx ON event_labels(room_id, label, topological_ordering);
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