From ed5331a6272280efd4fc98ae425711acec8c6be5 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Thu, 13 Sep 2018 16:10:56 +0100
Subject: [PATCH] comment

---
 synapse/storage/events.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index bc1c18023b..e7487311ce 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -1916,6 +1916,8 @@ class EventsStore(EventFederationStore, EventsWorkerStore, BackgroundUpdateStore
         should_delete_params = ()
         if not delete_local_events:
             should_delete_expr += " AND event_id NOT LIKE ?"
+
+            # We include the parameter twice since we use the expression twice
             should_delete_params += (
                 "%:" + self.hs.hostname,
                 "%:" + self.hs.hostname,