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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 51.9. pg_auth_members Columns
| Name |
Type |
References |
Description |
roleid |
oid |
pg_authid.oid |
ID of a role that has a member |
member |
oid |
pg_authid.oid |
ID of a role that is a member of roleid |
grantor |
oid |
pg_authid.oid |
ID of the role that granted this membership |
admin_option |
bool |
|
True if member can grant membership in roleid to others |