function buildDistinctQueryForVehicleEntityIdMappings(Zend_Db_Select $select, VF_Vehicle $vehicle)
{
$subSelect = $this->getReadAdapter()->select();
foreach ($this->schema()->getLevels() as $current_level) {
$level = $vehicle->getLevel($current_level);
if (!$level->getId()) {
continue;
}
$subSelect->where(sprintf("%s = ?", $current_level), $level->getTitle());
}
$select = $this->combineSubSelectIfWhereIsNotEmpty($select, $subSelect);
return $select;
}