DROP RESOURCE QUEUE
Removes a resource queue.
Synopsis
DROP RESOURCE QUEUE <queue_name>
Description
This command removes a resource queue from Cloudberry Database. To drop a resource queue, the queue cannot have any roles assigned to it, nor can it have any statements waiting in the queue. Only a superuser can drop a resource queue.
Parameters
queue_name
The name of a resource queue to remove.
Notes
Use ALTER ROLE to remove a user from a resource queue.
To see all the currently active queries for all resource queues, perform the following query of the pg_locks table joined with the pg_roles and pg_resqueue tables:
SELECT rolname, rsqname, locktype, objid, pid,
mode, granted FROM pg_roles, pg_resqueue, pg_locks WHERE
pg_roles.rolresqueue=pg_locks.objid AND
pg_locks.objid=pg_resqueue.oid;
To see the roles assigned to a resource queue, perform the following query of the pg_roles and pg_resqueue system catalog tables:
SELECT rolname, rsqname FROM pg_roles, pg_resqueue WHERE
pg_roles.rolresqueue=pg_resqueue.oid;
Examples
Remove a role from a resource queue (and move the role to the default resource queue, pg_default):
ALTER ROLE bob RESOURCE QUEUE NONE;
Remove the resource queue named adhoc:
DROP RESOURCE QUEUE adhoc;
Compatibility
The DROP RESOURCE QUEUE statement is a Cloudberry Database extension.
