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Merge pull request #5793 from matrix-org/erikj/fix_bg_update
Don't recreate current_state_events.membership column
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Reduce database IO usage by optimising queries for current membership.
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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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-- We add membership to current state so that we don't need to join against
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-- room_memberships, which can be surprisingly costly (we do such queries
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-- very frequently).
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-- This will be null for non-membership events and the content.membership key
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-- for membership events. (Will also be null for membership events until the
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-- background update job has finished).
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ALTER TABLE current_state_events ADD membership TEXT;
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-- This will be null for non-membership events and the content.membership key
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-- This will be null for non-membership events and the content.membership key
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-- for membership events. (Will also be null for membership events until the
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-- for membership events. (Will also be null for membership events until the
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-- background update job has finished).
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-- background update job has finished).
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ALTER TABLE current_state_events ADD membership TEXT;
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INSERT INTO background_updates (update_name, progress_json) VALUES
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INSERT INTO background_updates (update_name, progress_json) VALUES
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('current_state_events_membership', '{}');
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('current_state_events_membership', '{}');
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