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This documentation describes the integration of MindsDB with MongoDB, a document database with the scalability and flexibility that you want with the querying and indexing that you need.

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Prerequisites

Before proceeding, ensure the following prerequisites are met:
  1. Install MindsDB locally via Docker or Docker Desktop.

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Connection

Establish a connection to MongoDB from MindsDB by executing the following SQL command: 
CREATE DATABASE mongodb_datasource
WITH
  ENGINE = 'mongodb',
  PARAMETERS = {
    "host": "mongodb+srv://admin:admin_pass@demo.mongodb.net/public"
  };
Use the following parameters to establish the connection:
  • host: The connection string of the MongoDB server that includes user (admin), password (admin_pass), host and port (demo.mongodb.net), and database (public).
  • database: If the connection string does not include the /database path, provide it in this parameter.
Alternatively, the following set of connection parameters can be used:
  • username: The username associated with the database.
  • password: The password to authenticate your access.
  • host: The host of the MongoDB server.
  • port: The port through which TCP/IP connection is to be made.
  • database: The database name to be connected.

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Usage

Retrieve data from a specified collection by providing the integration name and collection name: 
SELECT *
FROM mongodb_datasource.my_collection
LIMIT 10;
The above examples utilize mongodb_datasource as the datasource name, which is defined in the CREATE DATABASE command.
At the moment, this integration only supports SELECT and UPDATE queries.

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Troubleshooting Guide

Database Connection Error
  • Symptoms: Failure to connect MindsDB with the MongoDB server.
  • Checklist:
    1. Make sure the MongoDB server is active.
    2. Confirm that host and credentials provided are correct. Try a direct MongoDB connection using a client like MongoDB Compass.
    3. Ensure a stable network between MindsDB and MongoDB. For example, if you are using MongoDB Atlas, ensure that the IP address of the machine running MindsDB is whitelisted.
Unknown statement
  • Symptoms: Errors related to the issuing of unsupported queries to MongoDB via the integration.
  • Checklist:
    1. Ensure the query is a SELECT or UPDATE query.
SQL statement cannot be parsed by mindsdb_sql
  • Symptoms: SQL queries failing or not recognizing collection names containing special characters.
  • Checklist:
    1. Ensure table names with special characters are enclosed in backticks.
    2. Examples:
      • Incorrect: SELECT * FROM integration.travel-data
      • Incorrect: SELECT * FROM integration.‘travel-data’
      • Correct: SELECT * FROM integration.`travel-data`