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authorErik Johnston <erik@matrix.org>2016-06-08 11:33:30 +0100
committerErik Johnston <erik@matrix.org>2016-06-08 11:33:30 +0100
commit1a815fb04f1d17286be27379dd7463936606bd3a (patch)
tree435e4b9cb2b00cf5936b91ed273c285e8baff302 /synapse/storage/presence.py
parentMerge pull request #850 from matrix-org/erikj/gc_threshold (diff)
downloadsynapse-1a815fb04f1d17286be27379dd7463936606bd3a.tar.xz
Don't hit DB for noop replications queries
Diffstat (limited to 'synapse/storage/presence.py')
-rw-r--r--synapse/storage/presence.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/storage/presence.py b/synapse/storage/presence.py
index 3fab57a7e8..d03f7c541e 100644
--- a/synapse/storage/presence.py
+++ b/synapse/storage/presence.py
@@ -118,6 +118,9 @@ class PresenceStore(SQLBaseStore):
             )
 
     def get_all_presence_updates(self, last_id, current_id):
+        if last_id == current_id:
+            return defer.succeed([])
+
         def get_all_presence_updates_txn(txn):
             sql = (
                 "SELECT stream_id, user_id, state, last_active_ts,"