docs/connector/flink/paimon.rst

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Apache Paimon (Incubating)
==========================

`Apache Paimon (Incubating)`_ is a streaming data lake platform that supports high-speed data ingestion, change data tracking, and efficient real-time analytics.

.. tip::
   This article assumes that you have mastered the basic knowledge and operation of `Apache Paimon (Incubating)`_.
   For the knowledge not mentioned in this article,
   you can obtain it from its `Official Documentation`_.

By using kyuubi, we can run SQL queries towards Apache Paimon (Incubating) which is more
convenient, easy to understand, and easy to expand than directly using flink.

Apache Paimon (Incubating) Integration
--------------------------------------

To enable the integration of kyuubi flink sql engine and Apache Paimon (Incubating), you need to:

- Referencing the Apache Paimon (Incubating) :ref:`dependencies<flink-paimon-deps>`

.. _flink-paimon-deps:

Dependencies
************

The **classpath** of kyuubi flink sql engine with Apache Paimon (Incubating) supported consists of

1. kyuubi-flink-sql-engine-\ |release|\ _2.12.jar, the engine jar deployed with a Kyuubi distribution
2. a copy of flink distribution
3. paimon-flink-<version>.jar (example: paimon-flink-1.18-0.8.1.jar), which can be found in the `Apache Paimon (Incubating) Supported Engines Flink`_
4. flink-shaded-hadoop-2-uber-<version>.jar, which code can be found in the `Pre-bundled Hadoop Jar`_

In order to make the Apache Paimon (Incubating) packages visible for the runtime classpath of engines, you need to:

1. Put the Apache Paimon (Incubating) packages into ``$FLINK_HOME/lib`` directly
2. Setting the HADOOP_CLASSPATH environment variable or copy the `Pre-bundled Hadoop Jar`_ to flink/lib.

.. warning::
   Please mind the compatibility of different Apache Paimon (Incubating) and Flink versions, which can be confirmed on the page of `Apache Paimon (Incubating) multi engine support`_.

Apache Paimon (Incubating) Operations
-------------------------------------

Taking ``CREATE CATALOG`` as a example,

.. code-block:: sql

   CREATE CATALOG my_catalog WITH (
       'type'='paimon',
       'warehouse'='file:/tmp/paimon'
   );

   USE CATALOG my_catalog;

Taking ``CREATE TABLE`` as a example,

.. code-block:: sql

   CREATE TABLE MyTable (
     user_id BIGINT,
     item_id BIGINT,
     behavior STRING,
     dt STRING,
     PRIMARY KEY (dt, user_id) NOT ENFORCED
   ) PARTITIONED BY (dt) WITH (
     'bucket' = '4'
   );

Taking ``Query Table`` as a example,

.. code-block:: sql

   SET 'execution.runtime-mode' = 'batch';
   SELECT * FROM orders WHERE catalog_id=1025;

Taking ``Streaming Query`` as a example,

.. code-block:: sql

   SET 'execution.runtime-mode' = 'streaming';
   SELECT * FROM MyTable /*+ OPTIONS ('log.scan'='latest') */;

Taking ``Rescale Bucket`` as a example,

.. code-block:: sql

   ALTER TABLE my_table SET ('bucket' = '4');
   INSERT OVERWRITE my_table PARTITION (dt = '2022-01-01');


.. _Apache Paimon (Incubating): https://paimon.apache.org/
.. _Official Documentation: https://paimon.apache.org/docs/master/
.. _Apache Paimon (Incubating) Supported Engines Flink: https://paimon.apache.org/docs/master/engines/flink/#preparing-paimon-jar-file
.. _Pre-bundled Hadoop Jar: https://flink.apache.org/downloads/#additional-components
.. _Apache Paimon (Incubating) multi engine support: https://paimon.apache.org/docs/master/engines/overview/