From 55727c7212ad085eb88aba2cec9ad4ebdec1efe9 Mon Sep 17 00:00:00 2001
From: Olivier 'reivilibre <oliverw@matrix.org>
Date: Thu, 18 Dec 2025 12:00:20 +0000
Subject: [PATCH] Clean up manual UPDATE many

---
 .../storage/databases/main/sticky_events.py   | 80 +++++++------------
 1 file changed, 30 insertions(+), 50 deletions(-)

diff --git a/synapse/storage/databases/main/sticky_events.py b/synapse/storage/databases/main/sticky_events.py
index da7534f3d8..e3b8f54ebe 100644
--- a/synapse/storage/databases/main/sticky_events.py
+++ b/synapse/storage/databases/main/sticky_events.py
@@ -37,6 +37,7 @@ from synapse.storage.databases.main.cache import CacheInvalidationWorkerStore
 from synapse.storage.databases.main.events import DeltaState
 from synapse.storage.databases.main.state import StateGroupWorkerStore
 from synapse.storage.engines import PostgresEngine
+from synapse.storage.engines.sqlite import Sqlite3Engine
 from synapse.storage.util.id_generators import MultiWriterIdGenerator
 from synapse.types.state import StateFilter
 from synapse.util.duration import Duration
@@ -533,69 +534,48 @@ class StickyEventsWorkerStore(StateGroupWorkerStore, CacheInvalidationWorkerStor
             (event_id, self._sticky_events_id_gen.get_next_txn(txn))
             for event_id in passing_event_ids
         ]
-        # [event_id, stream_pos, event_id, stream_pos, ...]
-        params = [p for pair in new_stream_ids for p in pair]
+
+        self.db_pool.simple_update_many_txn(
+            txn,
+            table="sticky_events",
+            key_names=("event_id",),
+            key_values=[(event_id,) for event_id, _stream_id in new_stream_ids],
+            value_names=(
+                "stream_id",
+                "soft_failed",
+            ),
+            value_values=[
+                (stream_id, False) for _event_id, stream_id in new_stream_ids
+            ],
+        )
+
+        # Also update the internal metadata on the event itself, so when we filter_events_for_client
+        # we don't filter them out. It's a bit sad internal_metadata is TEXT and not JSONB...
+        event_id_in_list_clause, event_id_in_list_args = make_in_list_sql_clause(
+            txn.database_engine,
+            "event_id",
+            passing_event_ids,
+        )
         if isinstance(txn.database_engine, PostgresEngine):
-            values_placeholders = ", ".join(["(?, ?)"] * len(new_stream_ids))
             txn.execute(
                 f"""
-                UPDATE sticky_events AS se
-                SET
-                    soft_failed = FALSE,
-                    stream_id   = v.stream_id
-                FROM (VALUES
-                    {values_placeholders}
-                ) AS v(event_id, stream_id)
-                WHERE se.event_id = v.event_id;
-                """,
-                params,
-            )
-            # Also update the internal metadata on the event itself, so when we filter_events_for_client
-            # we don't filter them out. It's a bit sad internal_metadata is TEXT and not JSONB...
-            clause, args = make_in_list_sql_clause(
-                txn.database_engine,
-                "event_id",
-                passing_event_ids,
-            )
-            txn.execute(
-                """
                 UPDATE event_json
                 SET internal_metadata = (
-                    jsonb_set(internal_metadata::jsonb, '{soft_failed}', 'false'::jsonb)
+                    jsonb_set(internal_metadata::jsonb, '{{soft_failed}}', 'false'::jsonb)
                 )::text
-                WHERE %s
-                """
-                % clause,
-                args,
+                WHERE {event_id_in_list_clause}
+                """,
+                event_id_in_list_args,
             )
         else:
-            # Use a CASE expression to update in bulk for sqlite
-            case_expr = " ".join(["WHEN ? THEN ? " for _ in new_stream_ids])
-            txn.execute(
-                f"""
-                UPDATE sticky_events
-                SET
-                    soft_failed = FALSE,
-                    stream_id = CASE event_id
-                        {case_expr}
-                        ELSE stream_id
-                    END
-                WHERE event_id IN ({",".join("?" * len(new_stream_ids))});
-                """,
-                params + [eid for eid, _ in new_stream_ids],
-            )
-            clause, args = make_in_list_sql_clause(
-                txn.database_engine,
-                "event_id",
-                passing_event_ids,
-            )
+            assert isinstance(txn.database_engine, Sqlite3Engine)
             txn.execute(
                 f"""
                 UPDATE event_json
                 SET internal_metadata = json_set(internal_metadata, '$.soft_failed', json('false'))
-                WHERE {clause}
+                WHERE {event_id_in_list_clause}
                 """,
-                args,
+                event_id_in_list_args,
             )
         # finally, invalidate caches
         for event_id in passing_event_ids: