Faster function getProductOptions for OpenCart module CSV Product Export

ka_export.php

	protected function getProductOptions($product_id) {

		$product_option_query = $this->db->query("SELECT po.product_option_id, po.option_id, od.name as option_name, ovd.name as product_option_value_name, o.type, po.required
			FROM " . DB_PREFIX . "product_option_value pov
			LEFT JOIN " . DB_PREFIX . "option_value ov ON (pov.option_value_id = ov.option_value_id)
			LEFT JOIN " . DB_PREFIX . "option_value_description ovd ON (ov.option_value_id = ovd.option_value_id)
			LEFT JOIN " . DB_PREFIX . "product_option po ON (pov.product_option_id = po.product_option_id)
			LEFT JOIN `" . DB_PREFIX . "option` o ON (po.option_id = o.option_id)
			LEFT JOIN " . DB_PREFIX . "option_description od ON (o.option_id = od.option_id)
			WHERE pov.product_id = " . (int)$product_id);

		if (empty($product_option_query->row)) {
			return false;
		}

		$product_option_value_data = array();

		$product_option_data = array();

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

			$product_option_value_data[$product_option['product_option_id']][]['name'] = $product_option['product_option_value_name'];

			$product_option_data[$product_option['product_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['product_option_id']]['product_option_value'] =& $product_option_value_data[$product_option['product_option_id']];

		}

		return $product_option_data;
	}