jannisko opened a new pull request, #38542:
URL: https://github.com/apache/airflow/pull/38542
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This PR makes using the ExternalTaskSensor simpler in cases where the
upstream DAG runs more frequently than the downstream DAG (e.g. a daily dag
must wait for all 24 runs of an hourly dag).
If the option `infer_upstream_execution_dates` is set to True, all
downstream data intervals, that overlap with the data interval of the upstream
dag will be checked.
Alternatively, the same functionality could be implemented as a custom
`execution_date_fn` function, but I think it's useful enough to be a separate
option.
@potiuk let me know what you think about this! 🙂
If you think it's useful, I'll add some documentation to
`docs/apache-airflow/howto/operator/external_task_sensor.rst`
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