private function _getNewColumnCount()
{
$totalColumnCount = $this->_criteria_column_count;
if (!empty($this->_criteriaColumnInsert)) {
$totalColumnCount += count($this->_criteriaColumnInsert);
}
if (!empty($this->_criteriaColumnDelete)) {
$totalColumnCount -= count($this->_criteriaColumnDelete);
}
return $totalColumnCount;
}