dbms_aqadm.create_queue ( queue_name     => 'AQ_IMPORT',
                           queue_table    => 'T_IMPORT_AQ',
                           max_retries    => 5,
                           retry_delay    => 60,
                           retention_time => 60,
                         );

begin        
   dbms_aqadm.stop_queue ( queue_name => 'AQ_IMPORT',
                           dequeue    => true,
                           enqueue    => false );       
end; 

begin        
   dbms_aqadm.start_queue ( queue_name => 'AQ_IMPORT',
                            enqueue    => true,
                            dequeue    => true );       
end;