From d3169e8d28a4b7238256ff4d3151e3cc8feef0e1 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Tue, 31 Jan 2017 11:20:03 +0000
Subject: [PATCH] Only fetch with row ts and count > 1

---
 synapse/storage/devices.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/synapse/storage/devices.py b/synapse/storage/devices.py
index e6fe67ee25..cccefdd3d2 100644
--- a/synapse/storage/devices.py
+++ b/synapse/storage/devices.py
@@ -552,9 +552,10 @@ class DeviceStore(SQLBaseStore):
                 SELECT destination, user_id, max(stream_id) as stream_id
                 FROM device_lists_outbound_pokes
                 GROUP BY destination, user_id
+                HAVING min(ts) < ? AND count(*) > 1
             """
 
-            txn.execute(select_sql)
+            txn.execute(select_sql, (yesterday,))
             rows = txn.fetchall()
 
             if not rows: