MatrixSynapse/synapse/storage/schema/main/delta/56/signing_keys_nonunique_sign...

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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.
*/
/* The cross-signing signatures index should not be a unique index, because a
* user may upload multiple signatures for the same target user. The previous
* index was unique, so delete it if it's there and create a new non-unique
* index. */
DROP INDEX IF EXISTS e2e_cross_signing_signatures_idx; CREATE INDEX IF NOT
EXISTS e2e_cross_signing_signatures2_idx ON e2e_cross_signing_signatures(user_id, target_user_id, target_device_id);