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.. _howto/operator:DruidOperator:

SQLExecuteQueryOperator to connect to Apache Druid
====================================================

Use the :class:`SQLExecuteQueryOperator<airflow.providers.common.sql.operators.sql.SQLExecuteQueryOperator>` to execute SQL queries against an
`Apache Druid <https://druid.apache.org/>`__ cluster.

.. note::
    Previously, a dedicated operator for Druid might have been used.
    After deprecation, please use the ``SQLExecuteQueryOperator`` instead.

.. note::
    Make sure you have installed the ``apache-airflow-providers-apache-druid`` package to enable Druid support.

Using the Operator
^^^^^^^^^^^^^^^^^^

Use the ``conn_id`` argument to connect to your Apache Druid instance where
the connection metadata is structured as follows:

.. list-table:: Druid Airflow Connection Metadata
   :widths: 25 25
   :header-rows: 1

   * - Parameter
     - Input
   * - Host: string
     - Druid broker hostname or IP address
   * - Schema: string
     - Not applicable (leave blank)
   * - Login: string
     - Not applicable (leave blank)
   * - Password: string
     - Not applicable (leave blank)
   * - Port: int
     - Druid broker port (default: 8082)
   * - Extra: JSON
     - Additional connection configuration, such as:
       ``{"endpoint": "/druid/v2/sql/", "method": "POST", "ssl_verify_cert": false}``

An example usage of the SQLExecuteQueryOperator to connect to Apache Druid is as follows:

.. exampleinclude:: /../tests/system/apache/druid/example_druid.py
   :language: python
   :start-after: [START howto_operator_druid]
   :end-before: [END howto_operator_druid]

Reference
^^^^^^^^^
For further information, see:

* `Apache Druid Documentation <https://druid.apache.org/docs/latest/>`__

.. note::
  Parameters provided directly via SQLExecuteQueryOperator() take precedence over those specified
  in the Airflow connection metadata (such as ``schema``, ``login``, ``password``, etc).
