What are Operators in Apache Airflow?

Operators are the building blocks of a DAG. Each operator represents a single, idempotent unit of work — a task. Airflow provides a wide variety of built-in operators:

• PythonOperator — executes a Python callable.
• BashOperator — runs a Bash command.
• EmailOperator — sends an email notification.
• HttpOperator — makes an HTTP request.
• SqlOperator / PostgresOperator — executes SQL against a database.

Operators are instantiated as Task objects inside a DAG context. They define what to do; the Airflow scheduler decides when to do it.

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