return mr

Signed-off-by: junjie.jiang <junjie.jiang@zilliz.com>

milvus_client.py

@@ -45,7 +45,7 @@ class MilvusClient(PyOperator):
         mr = self._collection.insert(row)
         if mr.err_count > 0:
             raise RuntimeError("Insert to milvus failed")
-        return None
+        return mr
 
     @property
     def shared_type(self):