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This is the implementation of the QuestDB data handler for MindsDB. QuestDB is a columnar time-series database with high performance ingestion and SQL analytics. It is open-source and available on the cloud.

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Prerequisites

Before proceeding, ensure the following prerequisites are met:
  1. Install MindsDB locally via Docker or Docker Desktop.
  2. To connect QuestDB to MindsDB, install the required dependencies following this instruction.
  3. Install or ensure access to QuestDB.

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Implementation

This handler is implemented by extending the PostgreSQL data handler. The required arguments to establish a connection are as follows:
  • user is the database user.
  • password is the database password.
  • host is the host name, IP address, or URL.
  • port is the port used to make TCP/IP connection.
  • database is the database name.
  • public stores a value of True or False. Defaults to True if left blank.

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Usage

In order to make use of this handler and connect to the QuestDB server in MindsDB, the following syntax can be used: 
CREATE DATABASE questdb_datasource
WITH
  ENGINE = 'questdb',
  PARAMETERS = {
    "host": "127.0.0.1",
    "port": 8812,
    "database": "qdb",
    "user": "admin",
    "password": "password"
  };
You can use this established connection to query your table as follows: 
SELECT *
FROM questdb_datasource.demo_table
LIMIT 10;