Fixed Record iteration:

* use self._raw, which is always possible even for test (raw) queries

Author: Jakub Urban

databases/backends/postgres.py

@@ -115,10 +115,10 @@ def __getitem__(self, key: typing.Any) -> typing.Any:
         return raw
 
     def __iter__(self) -> typing.Iterator:
-        return iter(self._column_map)
+        return iter(self._row.keys())
 
     def __len__(self) -> int:
-        return len(self._column_map)
+        return len(self._row)
 
 
 class PostgresConnection(ConnectionBackend):