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This is the implementation of the ScyllaDB data handler for MindsDB. ScyllaDB is an open-source distributed NoSQL wide-column data store. It was purposefully designed to offer compatibility with Apache Cassandra while outperforming it with higher throughputs and reduced latencies. For a comprehensive understanding of ScyllaDB, visit ScyllaDB’s official website.

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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 ScyllaDB to MindsDB, install the required dependencies following this instruction.
  3. Install or ensure access to ScyllaDB.

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Implementation

The ScyllaDB handler for MindsDB was developed using the scylla-driver library for Python. The required arguments to establish a connection are as follows:
  • host: Host name or IP address of ScyllaDB.
  • port: Connection port.
  • user: Authentication username. Optional; required only if authentication is enabled.
  • password: Authentication password. Optional; required only if authentication is enabled.
  • keyspace: The specific keyspace (top-level container for tables) to connect to.
  • protocol_version: Optional. Defaults to 4.
  • secure_connect_bundle: Optional. Needed only for connections to DataStax Astra.

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Usage

To set up a connection between MindsDB and a Scylla server, utilize the following SQL syntax: 
CREATE DATABASE scylladb_datasource
WITH
  ENGINE = 'scylladb',
  PARAMETERS = {
    "user": "user@mindsdb.com",
    "password": "pass",
    "host": "127.0.0.1",
    "port": "9042",
    "keyspace": "test_data"
  };
The protocol version is set to 4 by default. Should you wish to modify it, simply include “protocol_version”: 5 within the PARAMETERS dictionary in the query above.
With the connection established, you can execute queries on your keyspace as demonstrated below: 
SELECT * FROM scylladb_datasource.keystore.example_table LIMIT 10;