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Add note about Variable precedence with env vars #21568

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merged 1 commit into from Feb 15, 2022
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Add note about Variable precedence with env vars #21568

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3 changes: 2 additions & 1 deletion docs/apache-airflow/howto/variable.rst
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Expand Up @@ -62,7 +62,8 @@ You can use them in your DAGs as:
Single underscores surround ``VAR``. This is in contrast with the way ``airflow.cfg``
parameters are stored, where double underscores surround the config section name.
Variables set using Environment Variables would not appear in the Airflow UI but you will
be able to use them in your DAG file.
be able to use them in your DAG file. Variables set using Environment Variables will also
take precedence over variables defined in the Airflow UI.

Securing Variables
------------------
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