function loadAllRes(){

    $query = [
      "key" => "R.reservation_id",
      "from" => "ws_reservations R INNER JOIN ws_persons P ON R.reservation_id = P.reservation_id",
      "columns" => array(
          array( 'db' => 'R.reservation_id', 'dt' => 0 ),
          array( 'db' => 'R.reservation_id', 'dt' => 1 ),
          array( 'db' => 'concat(firstname, " ", lastname)', 'dt' => 2, 'as' => 'name'),
          array( 'db' => 'concat(section, " - ", grave)','dt' => 3 , 'as' => 'location'),
          array( 'db' => 'R.res_date', 'dt' => 4 ),
      ),
      "where" => "is_vet = 1",
    ];

    $whereR = (!isset($query['where'])) ? null : $query['where'];
    echo json_encode(
      SSP::complex( $_POST, $query['key'], $query['from'], $query['columns'], $whereR, null)
    );
}