Short guide: How to use PostgresOperator in Apache Airflow? https://medium.com/@xnuinside/short-guide-how-to-use-postgresoperator-in-apache-airflow-ca78d35fb435 code samples in dags/
Apache Airflow: add validation tasks to production DAG for end-2-end tests https://medium.com/@xnuinside/apache-airflow-add-validation-tasks-to-production-dag-for-end-2-end-tests-184e6d0af991 code samples in wrapper_add_test_tasks_to_dag/