1 files changed, 49 insertions, 0 deletions
diff --git a/synapse/storage/schema/main/delta/61/01insertion_event_lookups.sql b/synapse/storage/schema/main/delta/61/01insertion_event_lookups.sql
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+/* Copyright 2021 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.
+ */
+
+-- Add a table that keeps track of "insertion" events and
+-- their next_chunk_id's so we can navigate to the next chunk of history.
+CREATE TABLE IF NOT EXISTS insertion_events(
+    event_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
+    next_chunk_id TEXT NOT NULL
+);
+CREATE UNIQUE INDEX IF NOT EXISTS insertion_events_event_id ON insertion_events(event_id);
+CREATE INDEX IF NOT EXISTS insertion_events_next_chunk_id ON insertion_events(next_chunk_id);
+
+-- Add a table that keeps track of all of the events we are inserting between.
+-- We use this when navigating the DAG and when we hit an event which matches
+-- `insertion_prev_event_id`, it should backfill from the "insertion" event and
+-- navigate the historical messages from there.
+CREATE TABLE IF NOT EXISTS insertion_event_edges(
+    event_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
+    insertion_prev_event_id TEXT NOT NULL
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS insertion_event_edges_event_id ON insertion_event_edges(event_id);
+CREATE INDEX IF NOT EXISTS insertion_event_edges_insertion_room_id ON insertion_event_edges(room_id);
+CREATE INDEX IF NOT EXISTS insertion_event_edges_insertion_prev_event_id ON insertion_event_edges(insertion_prev_event_id);
+
+-- Add a table that keeps track of how each chunk is labeled. The chunks are
+-- connected together based on an insertion events `next_chunk_id`.
+CREATE TABLE IF NOT EXISTS chunk_events(
+    event_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
+    chunk_id TEXT NOT NULL
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS chunk_events_event_id ON chunk_events(event_id);
+CREATE INDEX IF NOT EXISTS chunk_events_chunk_id ON chunk_events(chunk_id);