Nette\Database\Helpers::detectTypes PHP Method

    public static function detectTypes(\PDOStatement $statement)
    {
        $types = [];
        $count = $statement->columnCount();
        // driver must be meta-aware, see PHP bugs #53782, #54695
        for ($col = 0; $col < $count; $col++) {
            $meta = $statement->getColumnMeta($col);
            if (isset($meta['native_type'])) {
                $types[$meta['name']] = self::detectType($meta['native_type']);
            }
        }
        return $types;
    }

 /**
  * Returns associative array of detected types (IReflection::FIELD_*) in result set.
  */
 public function getColumnTypes(\PDOStatement $statement)
 {
     return Nette\Database\Helpers::detectTypes($statement);
 }