Faster remote room joins: stream the un-partial-stating of events over replication. [rei:frrj/streams/unpsr] (#14545)

2 files changed, 54 insertions, 0 deletions

diff --git a/synapse/storage/schema/main/delta/73/22_un_partial_stated_event_stream.sql b/synapse/storage/schema/main/delta/73/22_un_partial_stated_event_stream.sql
new file mode 100644
index 0000000000..0e571f78c3
--- /dev/null
+++ b/synapse/storage/schema/main/delta/73/22_un_partial_stated_event_stream.sql
@@ -0,0 +1,34 @@
+/* Copyright 2022 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.
+ */
+
+-- Stream for notifying that an event has become un-partial-stated.
+CREATE TABLE un_partial_stated_event_stream(
+    -- Position in the stream
+    stream_id BIGINT PRIMARY KEY NOT NULL,
+
+    -- Which instance wrote this entry.
+    instance_name TEXT NOT NULL,
+
+    -- Which event has been un-partial-stated.
+    event_id TEXT NOT NULL REFERENCES events(event_id) ON DELETE CASCADE,
+
+    -- true iff the `rejected` status of the event changed when it became
+    -- un-partial-stated.
+    rejection_status_changed BOOLEAN NOT NULL
+);
+
+-- We want an index here because of the foreign key constraint:
+-- upon deleting an event, the database needs to be able to check here.
+CREATE UNIQUE INDEX un_partial_stated_event_stream_room_id ON un_partial_stated_event_stream (event_id);
diff --git a/synapse/storage/schema/main/delta/73/23_un_partial_stated_room_stream_seq.sql.postgres b/synapse/storage/schema/main/delta/73/23_un_partial_stated_room_stream_seq.sql.postgres
new file mode 100644
index 0000000000..1ec24702f3
--- /dev/null
+++ b/synapse/storage/schema/main/delta/73/23_un_partial_stated_room_stream_seq.sql.postgres
@@ -0,0 +1,20 @@
+/* Copyright 2022 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 SEQUENCE IF NOT EXISTS un_partial_stated_event_stream_sequence;
+
+SELECT setval('un_partial_stated_event_stream_sequence', (
+    SELECT COALESCE(MAX(stream_id), 1) FROM un_partial_stated_event_stream
+));