Application work: trying to create an dynamic SQL function

public function itemID($itemID){

			$db = JFactory::getDbo();

			$query = $db->getQuery(true);

			$query->select(	'typeID','groupID','typeName','description','mass',

							'volume','capacity','scapacity','portionSize','raceID',

							'basePrice','published','marketGroupID','chanceOfDuplicating')

           ->from('#__eve_invTypes  ')

		   ->where('typeID = ' .  "'". $itemID  . "'" );

			$db->setQuery($query);

			$this->set( 'invTypes', $db->loadRow());

	

	

	}

but my issue is that the only way i know how to call this function are to

$typeID = "12345";

$sql		 		= $this->getModel( 'sql' );

$sql->                                itemID($typeID);



and then 

$this->set ('querr', $sql->invTypes);

but the way i currently want to do it, are.

• Iv created a Model, that creates an array. (one of the values is an typeID)
  
• then i print out this array as an form in an theme.
  

then i want to do $db->loadRow()); on some of the value in that table. (this i have to do everywhere in my application)

So I thought it would be smart to create an function for this. but the issue here is that the value $itemID has to be printed out before the Theme are printed out, but i don't know how.