SELECT tp.grantee, t.table_type, tp.table_schema, tp.table_name, array_agg(tp.privilege_type::TEXT) AS privileges, Count(*) AS number_of_privileges
FROM information_schema.table_privileges AS tp INNER JOIN information_schema.tables AS t
ON t.table_schema=tp.table_schema AND t.table_name=tp.table_name
AND tp.table_schema IN  (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
AND grantee ='PUBLIC'
GROUP BY tp.grantee, t.table_type, tp.table_schema, tp.table_name
ORDER BY Count(*) DESC, grantee, tp.table_schema, t.table_type, tp.table_name;