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.
| || || ||ID of a role that has a member|
| || || ||ID of a role that is a member of |
| || || ||ID of the role that granted this membership|
| || ||True if |
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