DAGs, Operators & Dependencies Defining a DAG from airflow import DAG from airflow.operators.python import PythonOperator from airflow.operators.bash import BashOperator from datetime import datetime, timedelta with DAG(…
ReadIdempotency, Scaling & Configuration Task Idempotency # BAD — unconditional INSERT duplicates rows if this task retries or re-runs def load_bad(**context): db.execute("INSERT INTO daily_totals (date, total) VALUES (%s, %…
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