text: /* 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.
   */
  
  CREATE TABLE state_groups (
      id BIGINT PRIMARY KEY,
      room_id NVARCHAR(4000) NOT NULL,
      event_id NVARCHAR(4000) NOT NULL
  );
  
  CREATE TABLE state_groups_state (
      state_group BIGINT NOT NULL,
      room_id TEXT NOT NULL,
      type NVARCHAR(4000) NOT NULL,
      state_key NVARCHAR(4000) NOT NULL,
      event_id TEXT NOT NULL
  );
  
  CREATE TABLE state_group_edges (
      state_group BIGINT NOT NULL,
      prev_state_group BIGINT NOT NULL
  );
  
  CREATE INDEX state_group_edges_idx ON state_group_edges (state_group);
  CREATE INDEX state_group_edges_prev_idx ON state_group_edges (prev_state_group);
  CREATE INDEX state_groups_state_type_idx ON state_groups_state (state_group, type, state_key);
  