Sentry to Ranger permissions

There are no one-to-one mapping between Sentry privileges and Ranger service policies, therefore the Sentry privileges are translated to their equivalents within the Ranger service policies.

The following list illustrates how the Sentry privileges appear in Ranger after the migration:

Sentry permissions that are granted to roles are granted to groups in Ranger.
Sentry permissions that are granted to a parent object are granted to the child object as well. The migration process preserves the permissions that are applied to child objects. For example, a permission that is applied at the database level also applies to the tables within that database.
Sentry OWNER privileges are translated to the Ranger ALL privilege.
Sentry OWNER WITH GRANT OPTION privileges are translated to Ranger ALL with Delegated Admin checked.
Sentry does not differentiate between tables and views. When view permissions are migrated, they are treated as table names.
Sentry privileges on URIs uses the object store location as the base location.

The table below shows how actions in Sentry are applied to the corresponding action in Ranger:

Table 1. Sentry Actions to Ranger Actions
Sentry Action	Ranger Action
SELECT	SELECT
INSERT	UPDATE
CREATE	CREATE
REFRESH	REFRESH
ALL	ALL
SELECT with Grant	INSERT
INSERT with Grant	INSERT
CREATE with Grant	CREATE
ALL with Grant	ALL with Delegated Admin Checked