activity = |> topic('sportlinkkernel-ACTIVITY')
    ->filter([subtype]!='SUBFACILITY_AVAILABILITY')
    ->without('lastupdate','updateby')
    ->with('publicactivityid',PublicActivityId('A',123,123,123))
    ->materialize()
    ->join($activityAttributes,merge(),true)
    ->join($calendarDays,merge(),false)