mattinbits commented on issue #21171:
URL: https://github.com/apache/airflow/issues/21171#issuecomment-1400287367

   > > @potiuk As an initial fix for our internal system, I replaced 
`func.now()` with `func.GETDATE()` in an internal fork which is enough to fix 
it for SQL Server. This is not enough for cross-database compatibility of 
course. I have considered creating something similar to the functionality of 
sqlalchemy-utc to airflow.utils.sqlalchemy, but I had second thoughts whether 
this additional complexity is necessary. Do we need to rely on the DB's version 
of "now" in this case? Can we instead use `timezone.utcnow()`, i.e. let the 
application server decide what "now" is and pass it as a literal to the DB?
   > > Here are two places where `func.now()` is used in a filter, exposing 
this issue: 
https://github.com/apache/airflow/blob/main/airflow/models/dagrun.py#L294 
https://github.com/apache/airflow/blob/main/airflow/models/dag.py#L2872
   > > I can see in other places that `timezone.utcnow()` is used: 
https://github.com/apache/airflow/blob/main/airflow/models/taskinstance.py#L293 
https://github.com/apache/airflow/blob/main/airflow/models/trigger.py#L179
   > > I'm not sure if there is a particular reason why `func.now()` is needed 
in the first two instances?
   > 
   > @mattinbits thanks for the internal fix just to clarify do you mean 
replacing func.now() with func.GETUTCDATE() instead of func.GETDATE()? When I 
made those changes you suggested with func.GETUTCDATE() it worked.
   
   You're right, it was mistake in my initial comment. 


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