Problems with variants

$results = $this->database->loadObjectList();
					if(!empty($results)){
						foreach($results as $variant){
							foreach($element->characteristics as $char){
								$char_ids = array();
								foreach($char->values as $k => $val){
									$char_ids[]=$k;
								}
								if(!in_array($variant->variant_characteristic_id,$char_ids)){
									$this->database->setQuery('INSERT IGNORE INTO '.hikashop_table('variant').' (variant_characteristic_id,variant_product_id,ordering) VALUES ('.$char->default_id.','.$variant->variant_product_id.',0);');
									$this->database->query();
								}
							}
						}
					}

$links = $this->database->loadObjectList();
					if(!empty($results)){
						//for each variant, and for ech characteristic, if the link is missing between both, add one between the variant and the default value of the characteristic
						foreach($results as $variant){
							foreach($links as $link){
								if($link->variant_product_id==$results->product_id){
									foreach($element->characteristics as $char){
										$found = false;
										foreach($char->values as $k => $val){
											if($k==$link->variant_characteristic_id){
												$found = true;
											}
										}
										if(!$found){
											$this->database->setQuery('INSERT IGNORE INTO '.hikashop_table('variant').' (variant_characteristic_id,variant_product_id,ordering) VALUES ('.$char->default_id.','.$link->variant_product_id.',0);');
											$this->database->query();
										}
									}
								}
							}
						}
					}