Windows DSN Configuration

Using the Microsoft ODBC Data Source Administrator

You can use the Microsoft ODBC Data Source Administrator to edit the DSN configuration. Note that the DSN is created during the installation process.

Complete the following steps to edit the DSN configuration:

Select Start > Search, and enter ODBC Data Sources in the Search box.
Choose the version of the ODBC Administrator that corresponds to the bitness of your application (32-bit or 64-bit).
Click the System DSN tab.
Select the system data source and click Configure.
Edit the information on the Connection tab and click OK.

Note: For .NET Framework 4.0, the driver distributes Microsoft Visual C++ 2015-2022 Redistributable. For .NET Framework 3.5, the driver distributes Microsoft Visual C++ 2008 Redistributable.

Ensuring Registry Access

The driver stores connection information in the Windows registry. To ensure that the driver can write to the registry, perform either of the following actions:

Run the calling application as an administrator.
Connect via a User DSN instead of a System DSN.

Connecting to Databricks

To connect to a Databricks cluster, set the following properties:

Database: The name of the Databricks database.
Server: The Server Hostname of your Databricks cluster.
HTTPPath: The HTTP Path of your Databricks cluster.
Token: Your personal access token. You can obtain this value by navigating to the User Settings page of your Databricks instance and selecting the Access Tokens tab.

You can find the required values in your Databricks instance by navigating to Clusters and selecting the desired cluster, and selecting the JDBC/ODBC tab under Advanced Options.

Configuring Cloud Storage

The driver supports DBFS, Azure Blob Storage, and AWS S3 for uploading CSV files.

DBFS Cloud Storage

To use DBFS for cloud storage, set the CloudStorageType property to DBFS.

Azure Blob Storage

Set the following properties:

CloudStorageType: Azure Blob storage.
StoreTableInCloud: True to store tables in cloud storage when creating a new table.
AzureStorageAccount: The name of your Azure storage account.
AzureAccessKey: The storage key associated with your Databricks account. Find this via the azure portal (using the root account). Select your storage account and click Access Keys to find this value.
AzureBlobContainer: Set to the name of your Azure Blob storage container.

AWS S3 Storage

Set the following properties:

CloudStorageType: AWS S3.
StoreTableInCloud: True to store tables in cloud storage when creating a new table.
AWSAccessKey: The AWS account access key. You can acquire this value from your AWS security credentials page.
AWSSecretKey: Your AWS account secret key. You can acquire this value from your AWS security credentials page.
AWSS3Bucket: The name of your AWS S3 bucket.
AWSRegion: The hosting region for your Amazon Web Services. You can obtain the AWS Region value by navigating to the Buckets List page of your Amazon S3 service, for example, us-east-1.

Authenticating to Databricks

CData supports the following authentication schemes:

Personal Access Token
Microsoft Entra ID (Azure AD)
Azure Service Principal
OAuthU2M
OAuthM2M

Personal Access Token

To authenticate, set the following:

AuthScheme: PersonalAccessToken.
Token: The token used to access the Databricks server. It can be obtained by navigating to the User Settings page of your Databricks instance and selecting the Access Tokens tab.

Microsoft Entra ID (Azure AD)

Note: Microsoft has rebranded Azure AD as Entra ID. In topics that require the user to interact with the Entra ID Admin site, we use the same names Microsoft does. However, there are still CData connection properties whose names or values reference "Azure AD".

Before you can authenticate using Entra ID, you must first register an application with the Entra ID endpoint in the Azure portal, as described in Creating an Entra ID (Azure AD) Application. (See also Microsoft's own Configure an app in Azure portal.) Once the application has been completed, set these properties:

AuthScheme: AzureAD.
AzureTenant: The "Directory(tenant) ID" in the AzureAD application "Overview" page
OAuthClientId: The "Application(client) ID" in the AzureAD application "Overview" page.
CallbackURL: The "Redirect URIs" in AzureAD application "Authentication" page

When connecting, a web page opens that prompts you to authenticate. After successful authentication, the connection is established.

Example connection string:

"Server=https://adb-8439982502599436.16.azuredatabricks.net;HTTPPath=sql/protocolv1/o/8439982502599436/0810-011933-odsz4s3r;database=default;
AuthScheme=AzureAD;InitiateOAuth=GETANDREFRESH;AzureTenant=94be69e7-edb4-4fda-ab12-95bfc22b232f;OAuthClientId=f544a825-9b69-43d9-bec2-3e99727a1669;CallbackURL=http://localhost;"

Azure Service Principal

To authenticate, set the following properties:

AuthScheme: AzureServicePrincipal.
AzureTenantId: The tenant ID of your Microsoft Azure Active Directory.
AzureClientId: The application (client) ID of your Microsoft Azure Active Directory application.
AzureClientSecret: The application (client) secret of your Microsoft Azure Active Directory application.

OAuthU2M

OAuthU2M (User-to-Machine) authentication allows users to grant applications, such as CLI or SDK, access to their workspace. It uses a secure OAuth token, eliminating the need to share the user's password.

The following explains how OAuthU2M works:

After a user signs in and consents to the OAuthU2M authentication request, the tool or SDK receives an OAuth token. This token allows the tool or SDK to authenticate on the user's behalf.

By default, the driver uses an embedded OAuth application with a redirect URL of http://localhost:8020 which requires no setup. However, to customize the redirect URL or scopes used during authentication, you can register a custom OAuth application in the Databricks Account Console.

For instructions on registering a custom OAuth application, see Creating a Custom OAuth Application.

The required settings are:

AuthScheme: OAuthU2M
OAuthLevel: Set to the level at which you want to request the token.
OAuthClientId: Assigned when you register your application with an OAuth authorization server.
CallbackURL: The redirect URL registered with your OAuth application.
DatabricksAccountId: Required only when the OAuthLevel is set to AccountLevel.

OAuthM2M

OAuthM2M (Machine-to-Machine) authentication verifies the identiy of devices or applications communicating over a network. It ensures that only authorized machines can securely exchange data and access resources without human intervention.

The following explains how OAuthM2M works:

Register your application with the authorization server to obtain a client ID and secret. When accessing a protected resource, your machine sends a request with these credentials and desired scopes. The server verifies the provided information and, if valid, returns an access token. This token is included in the request header for API calls to access the resource.