fix: SQL -> Explore Overwrite flow (#13946)

superset/datasets/api.py

@@ -314,6 +314,8 @@ class DatasetRestApi(BaseSupersetModelRestApi):
             changed_model = UpdateDatasetCommand(
                 g.user, pk, item, override_columns
             ).run()
+            if override_columns:
+                RefreshDatasetCommand(g.user, pk).run()
             response = self.response(200, id=changed_model.id, result=item)
         except DatasetNotFoundError:
             response = self.response_404()