From 558f3d376a5a6f111bfd277528a510c8157aa99c Mon Sep 17 00:00:00 2001
From: Neil Johnson <neil@matrix.org>
Date: Tue, 29 May 2018 17:47:55 +0100
Subject: [PATCH] create index in background

---
 synapse/storage/registration.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index d8e60d2e87..c0bf5e9ed6 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -101,6 +101,13 @@ class RegistrationStore(RegistrationWorkerStore,
             columns=["user_id", "device_id"],
         )
 
+        self.register_background_index_update(
+            "users_creation_ts",
+            index_name="users_creation_ts",
+            table="users",
+            columns=["creation_ts"],
+        )
+
         # we no longer use refresh tokens, but it's possible that some people
         # might have a background update queued to build this index. Just
         # clear the background update.