PK,
If you have access to the Sentry Store backend use a query like this:
SELECT
r.ROLE_NAME,
g.GROUP_NAME,
p.*,
FROM_UNIXTIME(p.CREATE_TIME / 1000) as CREATE_TIME_DATE
FROM
SENTRY_ROLE r
INNER JOIN SENTRY_ROLE_GROUP_MAP rgm ON r.ROLE_ID = rgm.ROLE_ID
INNER JOIN SENTRY_GROUP g ON g.GROUP_ID = rgm.GROUP_ID
INNER JOIN SENTRY_ROLE_DB_PRIVILEGE_MAP rpm ON r.ROLE_ID = rpm.ROLE_ID
INNER JOIN SENTRY_DB_PRIVILEGE p ON p.DB_PRIVILEGE_ID = rpm.DB_PRIVILEGE_ID;
Hope it helps,
-JMP