To restrict access, the administrator might choose the UDF schema to override the feature in AtScale, where AtScale can use the needed UDF function from a single database. When Impala is configured with Sentry authorization, full access must be given to databases where AtScale UDF functions are registered. If this approach is desired, additional access must be configured in Sentry.
The schema used for UDF overrides in AtScale needs access for a user querying against Atscale. In Sentry/Hue, add user/group to the AtScale UDF schema for all users running queries. This means that users will need access to raw table and aggregate databases and database hosting UDF functions.