Starburst (Trino) Pre-Configuration Details

Feature Availability

Project Workspaces	Tag Ingestion	User Impersonation	Native Query Audit	Multiple Integrations

Requirement

• Starburst: A valid Starburst Enterprise license

Authentication Methods

The Starburst (Trino) integration supports the following authentication methods to create data sources in Immuta:

• Username and password: You can authenticate with your Starburst (Trino) username and password.
• OAuth 2.0: You can authenticate with OAuth 2.0. Immuta's OAuth authentication method uses the Client Credentials Flow; when you register a data source, Immuta reaches out to your OAuth server to generate a JSON web token (JWT) and then passes that token to the Starburst (Trino) cluster.

OAuth Authentication for Creating Data Sources

When users query a Starburst (Trino) data source, Immuta sends a username with the view SQL so that policies apply in the right context. Since OAuth authentication does not require a username to be associated with a data source upon data source creation, Immuta does not send a username and Starburst (Trino) queries fail. To avoid this error, you must configure a global admin username.

If you are using OAuth or asynchronous authentication to create Starburst (Trino) data sources, see the Starburst (Trino) configuration guide to set the globalAdminUsername property in the advanced configuration section of the Immuta app settings page.

Tag Ingestion

The Starburst (Trino) integration cannot ingest tags from Trino or Starburst, but you can connect any of these supported external catalogs to work with your integration.

User Impersonation

Native impersonation allows users to natively query data as another Immuta user. To enable native user impersonation, see the Integration User Impersonation page.

Native Query Audit

When the Trino Event Listener is enabled during the installation, Immuta can translate those events into comprehensive audit logs for users with the Immuta AUDIT permission to view. For more information about what is included in those audit logs, see the Starburst (Trino) Audit Logs page.

Multiple Starburst (Trino) Instances

You can configure multiple Starburst (Trino) integrations with a single Immuta instance and use them dynamically. Only configure the integration once in Immuta to use it in multiple Starburst (Trino) instances.

Limitations

• Certain interpolation functions can block the creation of a native view, specifically @interpolatedComparison() and @iam.

• Trino supports an optional anonymous (no authentication) access, which is not supported through Immuta because Immuta ties the Trino user account to the Immuta user account to correctly apply policies. If your organization allows anonymous access, you will not be able to use this integration.

• Limit your masked joins to columns with matching column types. Starburst truncates the result of the masking expression to conform to the native column type when performing the join, so joining two masked columns with different data types produces invalid results when one of the columns' lengths is less than the length of the masked value.

  For example, if the value of a hashed column is 64 characters, joining a hashed varchar(50) and a hashed varchar(255) column will not be joined correctly, since the varchar(50) value is truncated and doesn’t match the varchar(255) value.