## 52.9. `pg_auth_members`

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 The catalog `pg_auth_members` shows the membership relations between roles. Any non-circular set of relationships is allowed.

 Because user identities are cluster-wide, `pg_auth_members` is shared across all databases of a cluster: there is only one copy of `pg_auth_members` per cluster, not one per database.

**Table 52.9. `pg_auth_members` Columns**

|                                               Column Type<br/><br/> Description                                              |
|------------------------------------------------------------------------------------------------------------------------------|
|       `roleid` `oid` (references [`pg_authid`](catalog-pg-authid.html).`oid`)<br/><br/> ID of a role that has a member       |
| `member` `oid` (references [`pg_authid`](catalog-pg-authid.html).`oid`)<br/><br/> ID of a role that is a member of `roleid`  |
|`grantor` `oid` (references [`pg_authid`](catalog-pg-authid.html).`oid`)<br/><br/> ID of the role that granted this membership|
|                 `admin_option` `bool`<br/><br/> True if `member` can grant membership in `roleid` to others                  |

