Revert non-trivial schema changes and move them to a new schema version.

synapse/storage/schema/full_schemas/16/state.sql

@@ -0,0 +1,40 @@
+/* Copyright 2014, 2015 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.
+ */
+
+CREATE TABLE IF NOT EXISTS state_groups(
+    id VARCHAR(20) PRIMARY KEY,
+    room_id VARCHAR(150) NOT NULL,
+    event_id VARCHAR(150) NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS state_groups_state(
+    state_group VARCHAR(20) NOT NULL,
+    room_id VARCHAR(150) NOT NULL,
+    type VARCHAR(150) NOT NULL,
+    state_key VARCHAR(150) NOT NULL,
+    event_id VARCHAR(150) NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS event_to_state_groups(
+    event_id VARCHAR(150) NOT NULL,
+    state_group VARCHAR(150) NOT NULL,
+    UNIQUE (event_id)
+);
+
+CREATE INDEX IF NOT EXISTS state_groups_id ON state_groups(id);
+
+CREATE INDEX IF NOT EXISTS state_groups_state_id ON state_groups_state(state_group);
+CREATE INDEX IF NOT EXISTS state_groups_state_tuple ON state_groups_state(room_id, type, state_key);
+CREATE INDEX IF NOT EXISTS event_to_state_groups_id ON event_to_state_groups(event_id);