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MindsDB integrates with numerous AI and ML frameworks that are made available via the AI/ML engines. The AI/ML engines are used to create models based on the particular AI/ML framework.

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Description

The CREATE ML_ENGINE command creates an ML engine that uses one of the available AI/ML handlers.

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Syntax

Before creating an AI/ML engine, make sure that the AI/ML handler of your interest is available by querying for the ML handlers. 
SELECT *
FROM information_schema.handlers;
-- or 
SHOW HANDLERS;
If you can’t find the AI/ML handler of your interest, you can contribute by building a new AI/ML handler.Please note that in the process of contributing new AI.ML engines, ML engines and/or their tests will only run correctly if all dependencies listed in the requirements.txt file are installed beforehand.
If you find the AI/ML handler of your interest, then you can create an AI/ML engine using this command: 
CREATE ML_ENGINE [IF NOT EXISTS] ml_engine_name
FROM handler_name
[USING argument_key = argument_value];
Please replace ml_engine_name, handler_name, and optionally, argument_key and argument_value with the real values.
Please do not use the same ml_engine_name as the handler_name to avoid issue while dropping the ML engine.
To verify that your AI/ML engine was successfully created, run the command below: 
SELECT *
FROM information_schema.ml_engines;
-- or 
SHOW ML_ENGINES;
If you want to drop an ML engine, run the command below: 
DROP ML_ENGINE ml_engine_name;

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Example

Let’s check what AI/ML handlers are currently available: 
SHOW HANDLERS;
On execution, we get: 
+-------------------+--------------------+-------------------------------------------------------+---------+-----------------------------------------------------------------------------------------------------------------------------------------------------+----------------+-----------------------------------------------------------------------------+
| NAME              | TITLE              | DESCRIPTION                                           | VERSION | CONNECTION_ARGS                                                                                                                                     | IMPORT_SUCCESS | IMPORT_ERROR                                                                |
+-------------------+--------------------+-------------------------------------------------------+---------+-----------------------------------------------------------------------------------------------------------------------------------------------------+----------------+-----------------------------------------------------------------------------+
| "ray_serve"       | "RayServe"         | "MindsDB handler for Ray Serve"                       | "0.0.1" | "[NULL]"                                                                                                                                            | "true"         | "[NULL]"                                                                    |
| "neuralforecast"  | "NeuralForecast"   | "MindsDB handler for Nixtla's NeuralForecast package" | "0.0.1" | "[NULL]"                                                                                                                                            | "true"         | "[NULL]"                                                                    |
| "autosklearn"     | "Auto-Sklearn"     | "MindsDB handler for Auto-Sklearn"                    | "0.0.2" | "[NULL]"                                                                                                                                            | "false"        | "No module named 'autosklearn'"                                             |
| "mlflow"          | "MLFlow"           | "MindsDB handler for MLflow"                          | "0.0.2" | "[NULL]"                                                                                                                                            | "false"        | "No module named 'mlflow'"                                                  |
| "openai"          | "OpenAI"           | "MindsDB handler for OpenAI"                          | "0.0.1" | "[NULL]"                                                                                                                                            | "true"         | "[NULL]"                                                                    |
| "merlion"         | "Merlion"          | "MindsDB handler for Merlion"                         | "0.0.1" | "[NULL]"                                                                                                                                            | "false"        | "object.__init__() takes exactly one argument (the instance to initialize)" |
| "byom"            | "BYOM"             | "MindsDB handler for BYOM"                            | "0.0.1" | "{'code': {'type': 'path', 'description': 'The path to model code'}, 'modules': {'type': 'path', 'description': 'The path to model requirements'}}" | "true"         | "[NULL]"                                                                    |
| "ludwig"          | "Ludwig"           | "MindsDB handler for Ludwig AutoML"                   | "0.0.2" | "[NULL]"                                                                                                                                            | "false"        | "No module named 'dask'"                                                    |
| "lightwood"       | "Lightwood"        | "[NULL]"                                              | "1.0.0" | "[NULL]"                                                                                                                                            | "true"         | "[NULL]"                                                                    |
| "huggingface_api" | "Hugging Face API" | "MindsDB handler for Auto-Sklearn"                    | "0.0.2" | "[NULL]"                                                                                                                                            | "false"        | "No module named 'hugging_py_face'"                                         |
| "statsforecast"   | "StatsForecast"    | "MindsDB handler for Nixtla's StatsForecast package"  | "0.0.0" | "[NULL]"                                                                                                                                            | "true"         | "[NULL]"                                                                    |
| "huggingface"     | "Hugging Face"     | "MindsDB handler for Higging Face"                    | "0.0.1" | "[NULL]"                                                                                                                                            | "true"         | "[NULL]"                                                                    |
| "TPOT"            | "Tpot"             | "MindsDB handler for TPOT "                           | "0.0.2" | "[NULL]"                                                                                                                                            | "false"        | "No module named 'tpot'"                                                    |
| "langchain"       | "LangChain"        | "MindsDB handler for LangChain"                       | "0.0.1" | "[NULL]"                                                                                                                                            | "true"         | "[NULL]"                                                                    |
| "autokeras"       | "Autokeras"        | "MindsDB handler for Autokeras AutoML"                | "0.0.1" | "[NULL]"                                                                                                                                            | "false"        | "No module named 'autokeras'"                                               |
+-------------------+--------------------+-------------------------------------------------------+---------+-----------------------------------------------------------------------------------------------------------------------------------------------------+----------------+-----------------------------------------------------------------------------+
Here we create an AI/ML engine using the OpenAI handler and providing an OpenAI API key in the USING clause. 
CREATE ML_ENGINE my_openai_engine
FROM openai
USING
    openai_api_key = '<your opanai api key>';
On execution, we get: 
Query successfully completed
Now let’s verify that our ML engine exists. 
SHOW ML_ENGINES;
On execution, we get: 
+-------------------+------------+------------------------------------------------------+
|NAME               |HANDLER     |CONNECTION_DATA                                       |
+-------------------+------------+------------------------------------------------------+
|lightwood          |lightwood   |{"key":["password"],"value":[""]}                     |
|huggingface        |huggingface |{"key":["password"],"value":[""]}                     |
|openai             |openai      |{"key":["password"],"value":[""]}                     |
|my_openai_engine   |openai      |{"key":["openai_api_key","password"],"value":["",""]} |
+-------------------+------------+------------------------------------------------------+
Please note that the USING clause is optional, as it depends on the AI/ML handler whether it requires some arguments or not. Here, we created an OpenAI engine and provided own API key. After creating your ML engine, you can create a model like this: 
CREATE MODEL my_model
PREDICT answer
USING 
    engine = 'my_openai_engine',
    prompt_template = 'ask a question to a model'
The USING clause specifies the ML engine to be used for creating a new model.
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