:PROPERTIES:
:ID:       1ea42d73-3cd1-4cac-a6ee-028de21d08d5
:END:
#+title: Airflow Tasks
#+filetags: :airflow:database:definitions:

A task in the context of airflow is the basic unit of execution. They are arranged into [[id:3b16e19a-62f0-4705-a451-a8790181941f][Dags]] and then have upstream and downstream dependencies set between them in order to express the order in which they should be run.

There are three kinds of tasks:
1. Operators: they are predefined task templates that you can string together quickly.
2. Sensors: special subclass of operators, which are entirely about waiting for an external event to happen.
3. A Taskflow-decorated @task, which is a custom python function packaged as a task.

[[https://airflow.apache.org/docs/apache-airflow/stable/core-concepts/tasks.html][See this]]