2 files changed, 5 insertions, 0 deletions
diff --git a/lib/sqlalchemy/engine/default.py b/lib/sqlalchemy/engine/default.py
index 4d516e97c..1a8dbb4cd 100644
--- a/lib/sqlalchemy/engine/default.py
+++ b/lib/sqlalchemy/engine/default.py
@@ -67,6 +67,7 @@ class DefaultDialect(interfaces.Dialect):
     preexecute_autoincrement_sequences = False
     postfetch_lastrowid = True
     implicit_returning = False
+    full_returning = False
 
     cte_follows_insert = False
 
diff --git a/lib/sqlalchemy/engine/result.py b/lib/sqlalchemy/engine/result.py
index b29bc22d4..ead52a3f8 100644
--- a/lib/sqlalchemy/engine/result.py
+++ b/lib/sqlalchemy/engine/result.py
@@ -1259,6 +1259,10 @@ class IteratorResult(Result):
         return list(itertools.islice(self.iterator, 0, size))
 
 
+def null_result():
+    return IteratorResult(SimpleResultMetaData([]), iter([]))
+
+
 class ChunkedIteratorResult(IteratorResult):
     """An :class:`.IteratorResult` that works from an iterator-producing callable.