kaxil commented on a change in pull request #6715: [AIRFLOW-5945] Make inbuilt 
OperatorLinks work when using Serialization
URL: https://github.com/apache/airflow/pull/6715#discussion_r353108771
 
 

 ##########
 File path: airflow/contrib/operators/qubole_operator.py
 ##########
 @@ -240,3 +241,9 @@ def __setattr__(self, name, value):
             self.kwargs[name] = value
         else:
             object.__setattr__(self, name, value)
+
+    @classmethod
+    def get_serialized_fields(cls):
+        """Serialized QuboleOperator contain exactly these fields."""
+        cls._serialized_fields = frozenset(super().get_serialized_fields() | 
{"qubole_conn_id"})
 
 Review comment:
   The problem is when calling `super().get_serialized_fields()` it would set 
`cls._serialized_fields` from the BaseOperator, hence it would not have 
`{"sql"}` in it

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