MongoDB

MongoDB is a popular document database. It can be accessed using SQL via the MongoDB Connector for BI, also known as BI Connector.

BI Connector for MongoDB Atlas, cloud-based MongoDB service, is approaching end-of-life. It will be deprecated and no longer supported in June 2025.

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Prerequisites

To use Cube with MongoDB you need to install the MongoDB Connector for BI. Learn more about setup for MongoDB here.

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MongoDB Connector for BI
The hostname for the MongoDB database server
The username/password for the MongoDB database server

Setup

Manual

Add the following to a .env file in your Cube project:

dotenv

CUBEJS_DB_TYPE=mongobi
# The MongoBI connector host. If using on local machine, it should be either `localhost` or `127.0.0.1`:
CUBEJS_DB_HOST=my.mongobi.host
# The default port of the MongoBI connector service
CUBEJS_DB_PORT=3307
CUBEJS_DB_NAME=my_mongodb_database
CUBEJS_DB_USER=mongodb_server_user
CUBEJS_DB_PASS=mongodb_server_password
# MongoBI requires SSL connections, so set the following to `true`:
CUBEJS_DB_SSL=true

If you are connecting to a local MongoBI Connector, which is pointing to a local MongoDB instance, If MongoBI Connector and MongoDB are both running locally, then the above should work. To connect to a remote MongoDB instance, first configure mongosqld appropriately. See here for an example config file.

Environment Variables

Environment Variable	Description	Possible Values	Required
<EnvVar>CUBEJS_DB_HOST</EnvVar>	The host URL for a database	A valid database host URL	✅
<EnvVar>CUBEJS_DB_PORT</EnvVar>	The port for the database connection	A valid port number	❌
<EnvVar>CUBEJS_DB_NAME</EnvVar>	The name of the database to connect to	A valid database name	✅
<EnvVar>CUBEJS_DB_USER</EnvVar>	The username used to connect to the database	A valid database username	✅
<EnvVar>CUBEJS_DB_PASS</EnvVar>	The password used to connect to the database	A valid database password	✅
<EnvVar>CUBEJS_DB_SSL</EnvVar>	If `true`, enables SSL encryption for database connections from Cube	`true`, `false`	✅
<EnvVar>CUBEJS_DB_MAX_POOL</EnvVar>	The maximum number of concurrent database connections to pool. Default is `8`	A valid number	❌
<EnvVar>CUBEJS_CONCURRENCY</EnvVar>	The number of concurrent queries to the data source	A valid number	❌

Pre-Aggregation Feature Support

count_distinct_approx

Measures of type count_distinct_approx can not be used in pre-aggregations when using MongoDB as a source database.

Pre-Aggregation Build Strategies

To learn more about pre-aggregation build strategies, head here.

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Feature	Works with read-only mode?	Is default?
Batching	✅	✅
Export Bucket	-	-

By default, MongoDB uses batching to build pre-aggregations.

Batching

No extra configuration is required to configure batching for MongoDB.

Export Bucket

MongoDB does not support export buckets.

SSL

To enable SSL-encrypted connections between Cube and MongoDB, set the <EnvVar>CUBEJS_DB_SSL</EnvVar> environment variable to true. For more information on how to configure custom certificates, please check out Enable SSL Connections to the Database.