old_contents: # Copyright 2016 OpenMarket 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.engines import PostgresEngine
  from synapse.storage.prepare_database import get_statements
  
  import logging
  import ujson
  
  logger = logging.getLogger(__name__)
  
  
  ALTER_TABLE = """
  ALTER TABLE event_search ADD COLUMN origin_server_ts BIGINT;
  ALTER TABLE event_search ADD COLUMN stream_ordering BIGINT;
  
  CREATE INDEX event_search_room_order ON event_search(
      room_id, origin_server_ts, stream_ordering
  );
  CREATE INDEX event_search_order ON event_search(origin_server_ts, stream_ordering);
  """
  
  
  def run_create(cur, database_engine, *args, **kwargs):
      if not isinstance(database_engine, PostgresEngine):
          return
  
      for statement in get_statements(ALTER_TABLE.splitlines()):
          cur.execute(statement)
  
      cur.execute("SELECT MIN(stream_ordering) FROM events")
      rows = cur.fetchall()
      min_stream_id = rows[0][0]
  
      cur.execute("SELECT MAX(stream_ordering) FROM events")
      rows = cur.fetchall()
      max_stream_id = rows[0][0]
  
      if min_stream_id is not None and max_stream_id is not None:
          progress = {
              "target_min_stream_id_inclusive": min_stream_id,
              "max_stream_id_exclusive": max_stream_id + 1,
              "rows_inserted": 0,
          }
          progress_json = ujson.dumps(progress)
  
          sql = (
              "INSERT into background_updates (update_name, progress_json)"
              " VALUES (?, ?)"
          )
  
          sql = database_engine.convert_param_style(sql)
  
          cur.execute(sql, ("event_search_order", progress_json))
  
new_contents: # Copyright 2016 OpenMarket 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.engines import PostgresEngine
  from synapse.storage.prepare_database import get_statements
  
  import logging
  import ujson
  
  logger = logging.getLogger(__name__)
  
  
  ALTER_TABLE = """
  ALTER TABLE event_search ADD COLUMN origin_server_ts BIGINT;
  ALTER TABLE event_search ADD COLUMN stream_ordering BIGINT;
  
  CREATE INDEX event_search_room_order ON event_search(
      room_id, origin_server_ts, stream_ordering
  );
  CREATE INDEX event_search_order ON event_search(origin_server_ts, stream_ordering);
  """
  
  
  def run_create(cur, database_engine, *args, **kwargs):
      if not isinstance(database_engine, PostgresEngine):
          return
  
      for statement in get_statements(ALTER_TABLE.splitlines()):
          cur.execute(statement)
  
      cur.execute("SELECT MIN(stream_ordering) FROM events")
      rows = cur.fetchall()
      min_stream_id = rows[0][0]
  
      cur.execute("SELECT MAX(stream_ordering) FROM events")
      rows = cur.fetchall()
      max_stream_id = rows[0][0]
  
      if min_stream_id is not None and max_stream_id is not None:
          progress = {
              "target_min_stream_id_inclusive": min_stream_id,
              "max_stream_id_exclusive": max_stream_id + 1,
              "rows_inserted": 0,
          }
          progress_json = ujson.dumps(progress)
  
          sql = (
              "INSERT into background_updates (update_name, progress_json)"
              " VALUES (?, ?)"
          )
  
          sql = database_engine.convert_param_style(sql)
  
          cur.execute(sql, ("event_search_order", progress_json))
  
  
  def run_upgrade(cur, database_engine, *args, **kwargs):
      pass
  
subject: Add missing run_upgrade