> ## Documentation Index
> Fetch the complete documentation index at: https://cubed3-pavel-claude-nifty-archimedes-hbxga4.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Druid

> The driver for Druid is community-supported and is not maintained by Cube or the database vendor.

<Warning>
  The driver for Druid is community-supported and is not maintained by Cube or the database vendor.
</Warning>

## Prerequisites

* The URL for the [Druid][druid] database
* The username/password for the [Druid][druid] database server

## Setup

### Manual

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

```dotenv theme={null}
CUBEJS_DB_TYPE=druid
CUBEJS_DB_URL=https://my.druid.host:8082
CUBEJS_DB_USER=druid
CUBEJS_DB_PASS=**********
```

## Environment Variables

| Environment Variable | Description | Possible Values | Required |
| - | - | - | :-: |
| [`CUBEJS_DB_URL`](/reference/configuration/environment-variables#cubejs_db_url) | The URL for a database | A valid database URL for Druid | ✅ |
| [`CUBEJS_DB_USER`](/reference/configuration/environment-variables#cubejs_db_user) | The username used to connect to the database | A valid database username | ✅ |
| [`CUBEJS_DB_PASS`](/reference/configuration/environment-variables#cubejs_db_pass) | The password used to connect to the database | A valid database password | ✅ |
| [`CUBEJS_DB_MAX_POOL`](/reference/configuration/environment-variables#cubejs_db_max_pool) | The maximum number of concurrent database connections to pool. Default is `8` | A valid number | ❌ |
| [`CUBEJS_CONCURRENCY`](/reference/configuration/environment-variables#cubejs_concurrency) | The number of [concurrent queries][ref-data-source-concurrency] to the data source | A valid number | ❌ |

[ref-data-source-concurrency]: /admin/connect-to-data/concurrency#data-source-concurrency

## SSL

Cube does not require any additional configuration to enable SSL as Druid
connections are made over HTTPS.

[druid]: https://druid.apache.org/