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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.
from synapse.storage.database import LoggingTransaction
from synapse.storage.engines import BaseDatabaseEngine
from synapse.storage.prepare_database import get_statements
FIX_INDEXES = """
-- rebuild indexes as uniques
DROP INDEX groups_invites_g_idx;
CREATE UNIQUE INDEX group_invites_g_idx ON group_invites(group_id, user_id);
DROP INDEX groups_users_g_idx;
CREATE UNIQUE INDEX group_users_g_idx ON group_users(group_id, user_id);
-- rename other indexes to actually match their table names..
DROP INDEX groups_users_u_idx;
CREATE INDEX group_users_u_idx ON group_users(user_id);
DROP INDEX groups_invites_u_idx;
CREATE INDEX group_invites_u_idx ON group_invites(user_id);
DROP INDEX groups_rooms_g_idx;
CREATE UNIQUE INDEX group_rooms_g_idx ON group_rooms(group_id, room_id);
DROP INDEX groups_rooms_r_idx;
CREATE INDEX group_rooms_r_idx ON group_rooms(room_id);
"""
def run_create(cur: LoggingTransaction, database_engine: BaseDatabaseEngine) -> None:
rowid = database_engine.row_id_name
# remove duplicates from group_users & group_invites tables
cur.execute(
"""
DELETE FROM group_users WHERE %s NOT IN (
SELECT min(%s) FROM group_users GROUP BY group_id, user_id
);
"""
% (rowid, rowid)
)
cur.execute(
"""
DELETE FROM group_invites WHERE %s NOT IN (
SELECT min(%s) FROM group_invites GROUP BY group_id, user_id
);
"""
% (rowid, rowid)
)
for statement in get_statements(FIX_INDEXES.splitlines()):
cur.execute(statement)
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