title: How do I prevent logging an encrypted airflow variable?
body: <p>I've set up an airflow which has an encrypted variable declared. I'm using <a href="https://github.com/apache/incubator-airflow/blob/master/airflow/contrib/operators/bigquery_operator.py" rel="nofollow noreferrer">BigQueryOperator</a>. I use the encrypted variable in the SQL that is fed to the class. But the airflow logs the SQL after decrypting the variable. How can I prevent that from happening? </p>