public function execute()
 {
     $task_table = new PhabricatorWorkerArchiveTask();
     $conn_r = $task_table->establishConnection('r');
     $rows = queryfx_all($conn_r, 'SELECT * FROM %T %Q %Q %Q', $task_table->getTableName(), $this->buildWhereClause($conn_r), $this->buildOrderClause($conn_r), $this->buildLimitClause($conn_r));
     return $task_table->loadAllFromArray($rows);
 }