# pg_auth_members

The `pg_auth_members` system catalog table shows the membership relations between roles. Any non-circular set of relationships is allowed. Because roles are system-wide, `pg_auth_members` is shared across all databases of a OushuDB system.



Table 1. `pg_catalog.pg_auth_members`

| column         | type    | references    | description                                        |
| :------------- | :------ | :------------ | :------------------------------------------------- |
| `roleid`       | oid     | pg_authid.oid | ID of the parent-level (group) role                |
| `member`       | oid     | pg_authid.oid | ID of a member role                                |
| `grantor`      | oid     | pg_authid.oid | ID of the role that granted this membership        |
| `admin_option` | boolean |               | True if role member may grant membership to others |