public function getDatabaseName()
    {
        if (isset($this->_data['filter_column']) && is_string($this->_data['filter_column'])) {
            return $this->_data['filter_column'];
        }
        return $this->index();
    }
public function getDatabaseName()
    {
        if (isset($this->_data['filter_column']) && is_string($this->_data['filter_column'])) {
            return $this->_data['filter_column'];
        }
        return $this->index();
    }
public function getDatabaseName ( ) { if ( isset ( $ this -> _data [ 'filter_column' ] ) && is_string ( $ this -> _data [ 'filter_column' ] ) ) { return $ this -> _data [ 'filter_column' ] ; } return $ this -> index ( ) ; }
Returns column's database name

@return null|string
Returns column s database name