protected function AppendIf(QueryBuilder $QueryBuilder, E\IfExpression $Expression)
{
$QueryBuilder->Append('IF');
$QueryBuilder->Append('(');
$this->Append($QueryBuilder, $Expression->GetConditionExpression());
$QueryBuilder->Append(',');
$this->Append($QueryBuilder, $Expression->GetIfTrueExpression());
$QueryBuilder->Append(',');
$this->Append($QueryBuilder, $Expression->GetIfFalseExpression());
$QueryBuilder->Append(')');
}