Drop unused tables & unneeded access token ID for events. (#16268)

Drop the event_txn_id table and the tables related to MSC2716,
which is no longer supported in Synapse.

2 files changed, 26 insertions, 2 deletions

diff --git a/synapse/storage/schema/__init__.py b/synapse/storage/schema/__init__.py
index 5b50bd66bc..de89de7d74 100644
--- a/synapse/storage/schema/__init__.py
+++ b/synapse/storage/schema/__init__.py
@@ -125,8 +125,8 @@ Changes in SCHEMA_VERSION = 82
 
 
 SCHEMA_COMPAT_VERSION = (
-    # The `event_txn_id_device_id` must be written to for new events.
-    80
+    # The event_txn_id table and tables from MSC2716 no longer exist.
+    82
 )
 """Limit on how far the synapse codebase can be rolled back without breaking db compat
 
diff --git a/synapse/storage/schema/main/delta/82/03_drop_old_tables.sql b/synapse/storage/schema/main/delta/82/03_drop_old_tables.sql
new file mode 100644
index 0000000000..149020bbd7
--- /dev/null
+++ b/synapse/storage/schema/main/delta/82/03_drop_old_tables.sql
@@ -0,0 +1,24 @@
+/* Copyright 2023 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.
+ */
+
+-- Drop the old event transaction ID table, the event_txn_id_device_id table
+-- should be used instead.
+DROP TABLE IF EXISTS event_txn_id;
+
+-- Drop tables related to MSC2716 since the implementation is being removed
+DROP TABLE insertion_events;
+DROP TABLE insertion_event_edges;
+DROP TABLE insertion_event_extremities;
+DROP TABLE batch_events;