/**
  * Constructor
  * 
  * @param string $column
  * @return void
  * @ignore
  */
 public function __construct($column)
 {
     parent::__construct("Missing column '{$column}' in result set.");
 }
 /**
  * Constructor
  * 
  * @param PDOStatement $statement
  * @return void
  * @ignore
  */
 public function __construct($statement)
 {
     parent::__construct("Empty result set. Execute the statement before using with ezcGraphDatabaseTiein.");
 }
 /**
  * Constructor
  * 
  * @param array $row
  * @return void
  * @ignore
  */
 public function __construct($row)
 {
     $columnCount = count($row);
     parent::__construct("'{$columnCount}' columns are too many in a result.");
 }