Revert "Set thread_id column to non-null for event_push_{actions,actions_staging,summary} (#15437)" (#15580)

This reverts commit a7b3e9ce65335e452de216cb42b9e724e8f3ad1d.

4 files changed, 0 insertions, 170 deletions

diff --git a/synapse/storage/schema/__init__.py b/synapse/storage/schema/__init__.py
index 741563abc6..1672976209 100644
--- a/synapse/storage/schema/__init__.py
+++ b/synapse/storage/schema/__init__.py
@@ -106,9 +106,6 @@ Changes in SCHEMA_VERSION = 76:
 SCHEMA_COMPAT_VERSION = (
     # Queries against `event_stream_ordering` columns in membership tables must
     # be disambiguated.
-    #
-    # The threads_id column must written to with non-null values for the
-    # event_push_actions, event_push_actions_staging, and event_push_summary tables.
     74
 )
 """Limit on how far the synapse codebase can be rolled back without breaking db compat
diff --git a/synapse/storage/schema/main/delta/76/04thread_notifications_backfill.sql b/synapse/storage/schema/main/delta/76/04thread_notifications_backfill.sql
deleted file mode 100644
index ce6f9ff937..0000000000
--- a/synapse/storage/schema/main/delta/76/04thread_notifications_backfill.sql
+++ /dev/null
@@ -1,28 +0,0 @@
-/* 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.
- */
-
--- Force the background updates from 06thread_notifications.sql to run in the
--- foreground as code will now require those to be "done".
-
-DELETE FROM background_updates WHERE update_name = 'event_push_backfill_thread_id';
-
--- Overwrite any null thread_id values.
-UPDATE event_push_actions_staging SET thread_id = 'main' WHERE thread_id IS NULL;
-UPDATE event_push_actions SET thread_id = 'main' WHERE thread_id IS NULL;
-UPDATE event_push_summary SET thread_id = 'main' WHERE thread_id IS NULL;
-
--- Drop the background updates to calculate the indexes used to find null thread_ids.
-DELETE FROM background_updates WHERE update_name = 'event_push_actions_thread_id_null';
-DELETE FROM background_updates WHERE update_name = 'event_push_summary_thread_id_null';
diff --git a/synapse/storage/schema/main/delta/76/05thread_notifications_not_null.sql.postgres b/synapse/storage/schema/main/delta/76/05thread_notifications_not_null.sql.postgres
deleted file mode 100644
index 40936def6f..0000000000
--- a/synapse/storage/schema/main/delta/76/05thread_notifications_not_null.sql.postgres
+++ /dev/null
@@ -1,37 +0,0 @@
-/* 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.
- */
-
--- The thread_id columns can now be made non-nullable, this is done by using a
--- constraint (and not altering the column) to avoid taking out a full table lock.
---
--- We initially add an invalid constraint which guards against new data (this
--- doesn't lock the table).
-ALTER TABLE event_push_actions_staging
-    ADD CONSTRAINT event_push_actions_staging_thread_id CHECK (thread_id IS NOT NULL) NOT VALID;
-ALTER TABLE event_push_actions
-    ADD CONSTRAINT event_push_actions_thread_id CHECK (thread_id IS NOT NULL) NOT VALID;
-ALTER TABLE event_push_summary
-    ADD CONSTRAINT event_push_summary_thread_id CHECK (thread_id IS NOT NULL) NOT VALID;
-
--- We then validate the constraint which doesn't need to worry about new data. It
--- only needs a SHARE UPDATE EXCLUSIVE lock but can still take a while to complete.
-INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
-  (7605, 'event_push_actions_staging_thread_id', '{}'),
-  (7605, 'event_push_actions_thread_id', '{}'),
-  (7605, 'event_push_summary_thread_id', '{}');
-
--- Drop the indexes used to find null thread_ids.
-DROP INDEX IF EXISTS event_push_actions_thread_id_null;
-DROP INDEX IF EXISTS event_push_summary_thread_id_null;
diff --git a/synapse/storage/schema/main/delta/76/05thread_notifications_not_null.sql.sqlite b/synapse/storage/schema/main/delta/76/05thread_notifications_not_null.sql.sqlite
deleted file mode 100644
index e9372b6cf9..0000000000
--- a/synapse/storage/schema/main/delta/76/05thread_notifications_not_null.sql.sqlite
+++ /dev/null
@@ -1,102 +0,0 @@
-/* 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.
- */
-
- -- The thread_id columns can now be made non-nullable.
---
--- SQLite doesn't support modifying columns to an existing table, so it must
--- be recreated.
-
--- Create the new tables.
-CREATE TABLE event_push_actions_staging_new (
-    event_id TEXT NOT NULL,
-    user_id TEXT NOT NULL,
-    actions TEXT NOT NULL,
-    notif SMALLINT NOT NULL,
-    highlight SMALLINT NOT NULL,
-    unread SMALLINT,
-    thread_id TEXT,
-    inserted_ts BIGINT,
-    CONSTRAINT event_push_actions_staging_thread_id CHECK (thread_id is NOT NULL)
-);
-
-CREATE TABLE event_push_actions_new (
-    room_id TEXT NOT NULL,
-    event_id TEXT NOT NULL,
-    user_id TEXT NOT NULL,
-    profile_tag VARCHAR(32),
-    actions TEXT NOT NULL,
-    topological_ordering BIGINT,
-    stream_ordering BIGINT,
-    notif SMALLINT,
-    highlight SMALLINT,
-    unread SMALLINT,
-    thread_id TEXT,
-    CONSTRAINT event_id_user_id_profile_tag_uniqueness UNIQUE (room_id, event_id, user_id, profile_tag),
-    CONSTRAINT event_push_actions_thread_id CHECK (thread_id is NOT NULL)
-);
-
-CREATE TABLE event_push_summary_new (
-    user_id TEXT NOT NULL,
-    room_id TEXT NOT NULL,
-    notif_count BIGINT NOT NULL,
-    stream_ordering BIGINT NOT NULL,
-    unread_count BIGINT,
-    last_receipt_stream_ordering BIGINT,
-    thread_id TEXT,
-    CONSTRAINT event_push_summary_thread_id CHECK (thread_id is NOT NULL)
-);
-
--- Copy the data.
-INSERT INTO event_push_actions_staging_new (event_id, user_id, actions, notif, highlight, unread, thread_id, inserted_ts)
-    SELECT event_id, user_id, actions, notif, highlight, unread, thread_id, inserted_ts
-    FROM event_push_actions_staging;
-
-INSERT INTO event_push_actions_new (room_id, event_id, user_id, profile_tag, actions, topological_ordering, stream_ordering, notif, highlight, unread, thread_id)
-    SELECT room_id, event_id, user_id, profile_tag, actions, topological_ordering, stream_ordering, notif, highlight, unread, thread_id
-    FROM event_push_actions;
-
-INSERT INTO event_push_summary_new (user_id, room_id, notif_count, stream_ordering, unread_count, last_receipt_stream_ordering, thread_id)
-    SELECT user_id, room_id, notif_count, stream_ordering, unread_count, last_receipt_stream_ordering, thread_id
-    FROM event_push_summary;
-
--- Drop the old tables.
-DROP TABLE event_push_actions_staging;
-DROP TABLE event_push_actions;
-DROP TABLE event_push_summary;
-
--- Rename the tables.
-ALTER TABLE event_push_actions_staging_new RENAME TO event_push_actions_staging;
-ALTER TABLE event_push_actions_new RENAME TO event_push_actions;
-ALTER TABLE event_push_summary_new RENAME TO event_push_summary;
-
--- Recreate the indexes.
-CREATE INDEX event_push_actions_staging_id ON event_push_actions_staging(event_id);
-
-CREATE INDEX event_push_actions_highlights_index ON event_push_actions (user_id, room_id, topological_ordering, stream_ordering);
-CREATE INDEX event_push_actions_rm_tokens on event_push_actions( user_id, room_id, topological_ordering, stream_ordering );
-CREATE INDEX event_push_actions_room_id_user_id on event_push_actions(room_id, user_id);
-CREATE INDEX event_push_actions_stream_ordering on event_push_actions( stream_ordering, user_id );
-CREATE INDEX event_push_actions_u_highlight ON event_push_actions (user_id, stream_ordering);
-
-CREATE UNIQUE INDEX event_push_summary_unique_index2 ON event_push_summary (user_id, room_id, thread_id) ;
-
--- Recreate some indexes in the background, by re-running the background updates
--- from 72/02event_push_actions_index.sql and 72/06thread_notifications.sql.
-INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
-  (7403, 'event_push_summary_unique_index2', '{}')
-  ON CONFLICT (update_name) DO UPDATE SET progress_json = '{}';
-INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
-  (7403, 'event_push_actions_stream_highlight_index', '{}')
-  ON CONFLICT (update_name) DO UPDATE SET progress_json = '{}';