MatrixSynapse/synapse/storage/schema/delta/44/expire_url_cache.sql

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2017-09-28 13:18:06 +02:00
/* Copyright 2017 New Vector 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.
*/
-- this didn't work on SQLite 3.7 (because of lack of partial indexes), so was
-- removed and replaced with 46/local_media_repository_url_idx.sql.
--
-- CREATE INDEX local_media_repository_url_idx ON local_media_repository(created_ts) WHERE url_cache IS NOT NULL;
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-- we need to change `expires` to `expires_ts` so that we can index on it. SQLite doesn't support
-- indices on expressions until 3.9.
CREATE TABLE local_media_repository_url_cache_new(
url TEXT,
response_code INTEGER,
etag TEXT,
expires_ts BIGINT,
og TEXT,
media_id TEXT,
download_ts BIGINT
);
INSERT INTO local_media_repository_url_cache_new
SELECT url, response_code, etag, expires + download_ts, og, media_id, download_ts FROM local_media_repository_url_cache;
DROP TABLE local_media_repository_url_cache;
ALTER TABLE local_media_repository_url_cache_new RENAME TO local_media_repository_url_cache;
CREATE INDEX local_media_repository_url_cache_expires_idx ON local_media_repository_url_cache(expires_ts);
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CREATE INDEX local_media_repository_url_cache_by_url_download_ts ON local_media_repository_url_cache(url, download_ts);
CREATE INDEX local_media_repository_url_cache_media_idx ON local_media_repository_url_cache(media_id);