romData12 opened a new issue #12940:
URL: https://github.com/apache/airflow/issues/12940


   
https://github.com/apache/airflow/blob/5c74c3a5c1bc6424a068f1dd21a2d999b92cd8c5/airflow/models/dag.py#L2150
   
   
   
![image](https://user-images.githubusercontent.com/60224946/101606764-6b59d500-3a0c-11eb-9e16-33db4341e94d.png)
   
https://docs.sqlalchemy.org/en/13/core/sqlelement.html#sqlalchemy.sql.operators.ColumnOperators.is_
   
   as seen in the image the use of "is_"  is supported only in certain 
platforms, and SQL server isn't one of them
   
   this should be used with the **'='** operator that is supported by more SQL 
platforms


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