From c9f11d09fc85470cf9a36909104734a3682c4b39 Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Date: Thu, 22 Aug 2019 10:43:13 +0100
Subject: [PATCH] Add missing index on users_in_public_rooms. (#5894)

---
 changelog.d/5894.misc                           |  1 +
 .../delta/56/users_in_public_rooms_idx.sql      | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 changelog.d/5894.misc
 create mode 100644 synapse/storage/schema/delta/56/users_in_public_rooms_idx.sql

diff --git a/changelog.d/5894.misc b/changelog.d/5894.misc
new file mode 100644
index 000000000..fca4485ff
--- /dev/null
+++ b/changelog.d/5894.misc
@@ -0,0 +1 @@
+Add missing index on users_in_public_rooms to improve the performance of directory queries.
diff --git a/synapse/storage/schema/delta/56/users_in_public_rooms_idx.sql b/synapse/storage/schema/delta/56/users_in_public_rooms_idx.sql
new file mode 100644
index 000000000..149f8be8b
--- /dev/null
+++ b/synapse/storage/schema/delta/56/users_in_public_rooms_idx.sql
@@ -0,0 +1,17 @@
+/* Copyright 2019 Matrix.org Foundation CIC
+ *
+ * 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.
+ */
+
+-- this was apparently forgotten when the table was created back in delta 53.
+CREATE INDEX users_in_public_rooms_r_idx ON users_in_public_rooms(room_id);