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Update user_filters
table to have a unique index, and non-null columns (#1172)
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changelog.d/1172.misc
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changelog.d/1172.misc
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Update `user_filters` table to have a unique index, and non-null columns. Thanks to @pik for contributing this.
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synapse/storage/schema/delta/56/unique_user_filter_index.py
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synapse/storage/schema/delta/56/unique_user_filter_index.py
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import logging
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from synapse.storage.engines import PostgresEngine
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logger = logging.getLogger(__name__)
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def run_upgrade(cur, database_engine, *args, **kwargs):
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if isinstance(database_engine, PostgresEngine):
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select_clause = """
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CREATE TEMPORARY TABLE user_filters_migration AS
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SELECT DISTINCT ON (user_id, filter_id) user_id, filter_id, filter_json
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FROM user_filters;
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"""
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else:
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select_clause = """
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CREATE TEMPORARY TABLE user_filters_migration AS
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SELECT * FROM user_filters GROUP BY user_id, filter_id;
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"""
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sql = (
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"""
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BEGIN;
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%s
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DROP INDEX user_filters_by_user_id_filter_id;
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DELETE FROM user_filters;
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ALTER TABLE user_filters
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ALTER COLUMN user_id SET NOT NULL
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ALTER COLUMN filter_id SET NOT NULL
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ALTER COLUMN filter_json SET NOT NULL;
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INSERT INTO user_filters(user_id, filter_id, filter_json)
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SELECT * FROM user_filters_migration;
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DROP TABLE user_filters_migration;
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CREATE UNIQUE INDEX user_filters_by_user_id_filter_id_unique
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ON user_filters(user_id, filter_id);
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END;
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"""
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% select_clause
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)
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if isinstance(database_engine, PostgresEngine):
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cur.execute(sql)
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else:
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cur.executescript(sql)
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def run_create(cur, database_engine, *args, **kwargs):
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pass
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