53.9. pg_group #

   The view pg_group exists for backwards compatibility: it emulates a
   catalog that existed in PostgreSQL before version 8.1. It shows the
   names and members of all roles that are marked as not rolcanlogin,
   which is an approximation to the set of roles that are being used as
   groups.

   Table 53.9. pg_group Columns

   Column Type

   Description

   groname name (references pg_authid.rolname)

   Name of the group

   grosysid oid (references pg_authid.oid)

   ID of this group

   grolist oid[] (references pg_authid.oid)

   An array containing the IDs of the roles in this group