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.. _howto/operator:PrestoOperator:

SQLExecuteQueryOperator to connect to Presto

Use the :class:SQLExecuteQueryOperator<airflow.providers.common.sql.operators.sql> to execute Presto commands in a Presto <https://prestodb.io/docs/current/>__ database.

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

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

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

• • Parameter
  • Input
• • Host: string
  • Presto server hostname or container name
• • Schema: string
  • Schema to execute SQL operations on by default
• • Login: string
  • Presto user (required)
• • Password: string
  • Presto user password (if authentication is enabled)
• • Port: int
  • Presto server port (default: 8080)
• • Extra: JSON
  • Additional parameters such as {"user": "airflow_user"}

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

.. exampleinclude:: /../../presto/tests/system/presto/example_presto.py :language: python :start-after: [START howto_operator_presto] :end-before: [END howto_operator_presto]

Reference ^^^^^^^^^ For further information, look at:

• Presto Documentation <https://prestodb.io/docs/current/>__

.. note::

Parameters given via SQLExecuteQueryOperator() are given first-place priority relative to parameters set via Airflow connection metadata (such as schema, login, password etc).