From bf51d2ffc7840af0f7f7d7c34fa469e2bff0ed33 Mon Sep 17 00:00:00 2001
From: "Olivier Wilkinson (reivilibre)" <olivier@librepush.net>
Date: Thu, 27 Aug 2020 09:10:07 +0100
Subject: [PATCH] Also fix `simple_select_onecol_txn`

---
 synapse/storage/database.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/storage/database.py b/synapse/storage/database.py
index 207fa9d7df..53858db9a3 100644
--- a/synapse/storage/database.py
+++ b/synapse/storage/database.py
@@ -1120,7 +1120,7 @@ class DatabasePool(object):
         txn: LoggingTransaction,
         table: str,
         keyvalues: Dict[str, Any],
-        retcol: Iterable[str],
+        retcol: str,
     ) -> List[Any]:
         sql = ("SELECT %(retcol)s FROM %(table)s") % {"retcol": retcol, "table": table}