SpiceDB is an open source, Google Zanzibar-inspired, database system for creating and managing security-critical application permissions.

SpiceDB

```
spicedb=# select * from relation_tuple;
 namespace | object_id | relation | userset_namespace | userset_object_id | userset_relation | created_xid |     deleted_xid     
-----------+-----------+----------+-------------------+-------------------+------------------+-------------+---------------------
 resource  | alerts    | reader   | role              | readonly          | member           |         787 | 9223372036854775807
 resource  | views     | reader   | role              | readonly          | member           |         787 | 9223372036854775807
```