In this post, I am sharing a script to find Greenplum user role information with their associated Resource Queue. You can also find other details like type of user and its validity.
We can also use this script to prepare an audit on a list of available users/roles of Greenplum.

SELECT rolname as RoleName
   ,case
	  when rolsuper = 't' then
		   'SUPERUSER'
	  else
		   'NORMAL'
	  end as SuperUser
   ,case
	  when rolcanlogin = 't' then
		   'LOGIN'
	  else
		   'GROUP'
   end as RoleType
   ,rolvaliduntil as RoleValidUntill
   ,rsqname as RQName
FROM pg_roles, gp_toolkit.gp_resqueue_status
WHERE pg_roles.rolresqueue=gp_toolkit.gp_resqueue_status.queueid
order by rolname;

In this post, I am sharing a script to get all the information related to configured Resource Queues of Greenplum.
Once we set resource queues and their priorities, then also we should check RQ configuration frequently to achieve the frequent changes in user role group and their preferences.

SELECT
	grs.rsqname       
	,grs.rsqcountlimit 
	,grs.rsqcountvalue  
	,grs.rsqcostlimit   
	,grs.rsqcostvalue   
	,grs.rsqmemorylimit 
	,grs.rsqmemoryvalue 
	,grs.rsqwaiters     
	,grs.rsqholders     
	,(select ressetting from pg_resqueue_attributes b
	where b.rsqname = grs.rsqname and resname='priority') as Priority
	,(select ressetting from pg_resqueue_attributes b
	where grs.rsqname=b.rsqname and resname='cost_overcommit') as CostOvercommit
	,(select count(*) from pg_resqueue x,pg_roles y
	where x.oid=y.rolresqueue and grs.rsqname=x.rsqname) as RQAssignedUsers
	,(select count(*) from pg_resqueue x,pg_roles y
	where x.oid=y.rolresqueue and grs.rsqname=x.rsqname and y.rolcanlogin = 't') as RQLogUsers
	,(select count(*) from pg_resqueue x,pg_roles y
	where x.oid=y.rolresqueue and grs.rsqname=x.rsqname and y.rolcanlogin = 'f') as RQGroupUsers
FROM gp_toolkit.gp_resqueue_status grs;