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66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
# Copyright 2023 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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from synapse.config.homeserver import HomeServerConfig
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from synapse.storage.database import LoggingTransaction
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from synapse.storage.engines import BaseDatabaseEngine, Sqlite3Engine
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def run_update(
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cur: LoggingTransaction,
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database_engine: BaseDatabaseEngine,
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config: HomeServerConfig,
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) -> None:
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"""
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Fix to drop unused indexes caused by incorrectly adding UNIQUE constraint to
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columns `user_id` and `full_user_id` of table `user_filters` in previous migration.
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"""
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if isinstance(database_engine, Sqlite3Engine):
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cur.execute("DROP TABLE IF EXISTS temp_user_filters")
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create_sql = """
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CREATE TABLE temp_user_filters (
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full_user_id text NOT NULL,
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user_id text NOT NULL,
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filter_id bigint NOT NULL,
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filter_json bytea NOT NULL
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)
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"""
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cur.execute(create_sql)
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copy_sql = """
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INSERT INTO temp_user_filters (
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user_id,
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filter_id,
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filter_json,
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full_user_id)
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SELECT user_id, filter_id, filter_json, full_user_id FROM user_filters
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"""
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cur.execute(copy_sql)
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drop_sql = """
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DROP TABLE user_filters
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"""
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cur.execute(drop_sql)
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rename_sql = """
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ALTER TABLE temp_user_filters RENAME to user_filters
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"""
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cur.execute(rename_sql)
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index_sql = """
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CREATE UNIQUE INDEX IF NOT EXISTS user_filters_unique ON
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user_filters (user_id, filter_id)
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"""
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cur.execute(index_sql)
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