diff --git a/pinotdb/db.py b/pinotdb/db.py
index 7e9ac8b..e1546bf 100644
--- a/pinotdb/db.py
+++ b/pinotdb/db.py
@@ -524,10 +524,10 @@ def fetchmany(self, size=None):
     def fetchall(self):
         """
         Fetch all (remaining) rows of a query result, returning them as a
-        sequence of sequences (e.g. a list of tuples). Note that the cursor's
-        arraysize attribute can affect the performance of this operation.
+        sequence of sequences (e.g. a list of tuples).
         """
-        return list(self)
+        results, self._results = self._results, []
+        return results
 
     @check_result
     @check_closed