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This is the implementation of the MonetDB data handler for MindsDB. MonetDB is an open-source column-oriented relational database management system originally developed at the Centrum Wiskunde & Informatica in the Netherlands. It is designed to provide high performance on complex queries against large databases, such as combining tables with hundreds of columns and millions of rows.

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Implementation

This handler is implemented using pymonetdb, a Python library that allows you to use Python code to run SQL commands on the MonetDB database. The required arguments to establish a connection are as follows:
  • user is the username associated with the database.
  • password is the password to authenticate your access.
  • host is the host name or IP address.
  • port is the port through which TCP/IP connection is to be made.
  • database is the database name to be connected.
  • schema_name is the schema name to get tables. It is optional and defaults to the current schema if not provided.
If you installed MindsDB locally via pip, you need to install all handler dependencies manually. To do so, go to the handler’s folder (mindsdb/integrations/handlers/monetdb_handler) and run this command: pip install -r requirements.txt.

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Usage

In order to make use of this handler and connect to the MonetDB database in MindsDB, the following syntax can be used: 
CREATE DATABASE monetdb_datasource
WITH
    engine = 'monetdb',
    parameters = {
        "user": "monetdb",
        "password": "monetdb",
        "host": "127.0.0.1",
        "port": 50000,
        "schema_name": "sys",
        "database": "demo"
    };
You can use this established connection to query your table as follows: 
SELECT *
FROM monetdb_datasource.demo;
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