Fast OpenCart catalog functions getProductAttributes and getProductOptions in catalog/model/catalog/product.php

product.php

public function getProductAttributes($product_id) {
		$product_attribute_group_data = array();

		$product_attribute_group_query = $this->db->query("SELECT a.attribute_id, ad.name as attribute_name, pa.text, ag.attribute_group_id, agd.name as attribute_group_name FROM " . DB_PREFIX . "product_attribute pa
		LEFT JOIN " . DB_PREFIX . "attribute a ON (pa.attribute_id = a.attribute_id)
		LEFT JOIN " . DB_PREFIX . "attribute_description ad ON (a.attribute_id = ad.attribute_id)
		LEFT JOIN " . DB_PREFIX . "attribute_group ag ON (a.attribute_group_id = ag.attribute_group_id)
		LEFT JOIN " . DB_PREFIX . "attribute_group_description agd ON (ag.attribute_group_id = agd.attribute_group_id)
		WHERE pa.product_id = " . (int)$product_id . "
			AND ad.language_id = agd.language_id
			AND pa.language_id = agd.language_id
			AND agd.language_id = " . (int)$this->config->get('config_language_id') . "
		ORDER BY ag.sort_order, agd.name, a.sort_order, ad.name");

		$product_attribute_data = array();

		foreach ($product_attribute_group_query->rows as $product_attribute) {
			$product_attribute_data[$product_attribute['attribute_id']][] = array(
				'attribute_id' => $product_attribute['attribute_id'],
				'name'         => $product_attribute['attribute_name'],
				'text'         => $product_attribute['text']
			);

			$product_attribute_group_data[$product_attribute['attribute_group_id']] = array(
				'attribute_group_id' => $product_attribute['attribute_group_id'],
				'name'               => $product_attribute['attribute_group_name'],
			);

			$product_attribute_group_data[$product_attribute['attribute_group_id']]['attribute'] =& $product_attribute_data[$product_attribute['attribute_id']];

		}

		return $product_attribute_group_data;
	}
public function getProductOptions($product_id) {
		$product_option_data = array();
        $product_option_query = $this->db->query("SELECT pov.product_option_value_id, pov.option_value_id, ovd.name as product_option_value_name, od.name as option_name, ov.image, pov.quantity, pov.subtract, pov.price, pov.price_prefix, pov.points, pov.points_prefix, pov.weight, pov.weight_prefix, pov.product_option_id, pov.option_id, o.type, po.required
            FROM " . DB_PREFIX . "product_option_value pov
            LEFT JOIN " . DB_PREFIX . "option_value ov ON (pov.option_value_id = ov.option_value_id)
            LEFT JOIN " . DB_PREFIX . "option_value_description ovd ON (ov.option_value_id = ovd.option_value_id)
            LEFT JOIN " . DB_PREFIX . "product_option po ON (pov.product_option_id = po.product_option_id)
            LEFT JOIN `" . DB_PREFIX . "option` o ON (po.option_id = o.option_id)
            LEFT JOIN " . DB_PREFIX . "option_description od ON (o.option_id = od.option_id)
            WHERE po.product_id = " . (int)$product_id . "
                AND od.language_id = " . (int)$this->config->get('config_language_id') . "
            ORDER BY o.sort_order, ov.sort_order");

        $product_option_value_data = array();

        foreach ($product_option_query->rows as $product_option) {

        	if (in_array($product_option['type'], array('select','radio','checkbox','image'))) {

	            $product_option_value_data[$product_option['product_option_id']][] = array(
	                'product_option_value_id' => $product_option['product_option_value_id'],
	                'option_value_id'         => $product_option['option_value_id'],
	                'name'                    => $product_option['product_option_value_name'],
	                'image'                   => $product_option['image'],
	                'quantity'                => $product_option['quantity'],
	                'subtract'                => $product_option['subtract'],
	                'price'                   => $product_option['price'],
	                'price_prefix'            => $product_option['price_prefix'],
	                'points'                  => $product_option['points'],
	                'points_prefix'           => $product_option['points_prefix'],
	                'weight'                  => $product_option['weight'],
	                'weight_prefix'           => $product_option['weight_prefix']
	            );

	            $product_option_data[$product_option['option_id']] = array(
					'product_option_id'    => $product_option['product_option_id'],
					'option_id'            => $product_option['option_id'],
					'name'                 => $product_option['option_name'],
					'type'                 => $product_option['type'],
					'required'             => $product_option['required']
				);

				$product_option_data[$product_option['option_id']]['option_value'] =& $product_option_value_data[$product_option['product_option_id']];

        	}else{
        		$product_option_data[$product_option['option_id']] = array(
					'product_option_id' => $product_option['product_option_id'],
					'option_id'         => $product_option['option_id'],
					'name'              => $product_option['option_name'],
					'type'              => $product_option['type'],
					'option_value'      => $product_option['option_value'],
					'required'          => $product_option['required']
				);
        	}
        }

		return $product_option_data;
	}