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remove duplicates from groups tables

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and rename inconsistently named indexes.
Based on https://github.com/matrix-org/synapse/pull/3128 - thanks @vurpo\!
This commit is contained in:
Matthew Hodgson 2018-04-25 14:58:43 +01:00
parent 1bb83d5d41
commit e3a373f002
1 changed files with 34 additions and 0 deletions
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34
synapse/storage/schema/delta/48/group_unique_indexes.sql Normal file
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/* Copyright 2018 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.
*/
-- remove duplicates from group_users table
DELETE FROM group_users WHERE ctid NOT IN (
SELECT min(ctid) FROM group_users GROUP BY group_id, user_id
);
DROP INDEX groups_users_g_idx;
CREATE UNIQUE INDEX group_users_g_idx ON group_users(group_id, user_id);
-- remove duplicates from group_invites table
DELETE FROM group_invites WHERE ctid NOT IN (
SELECT min(ctid) FROM group_invites GROUP BY group_id, user_id
);
DROP INDEX groups_invites_g_idx;
CREATE UNIQUE INDEX group_invites_g_idx ON group_invites(group_id, user_id);
-- rename other indexes to actually match their table names...
ALTER INDEX groups_users_u_idx RENAME TO group_users_u_idx;
ALTER INDEX groups_invites_u_idx RENAME TO group_invites_u_idx;
ALTER INDEX groups_rooms_g_idx RENAME TO group_rooms_g_idx;
ALTER INDEX groups_rooms_r_idx RENAME TO group_rooms_r_idx;