QQueryBuilder::AddSelectFunction PHP Method

    public function AddSelectFunction($strFunctionName, $strColumnName, $strFullAlias)
    {
        $this->strSelectArray[$strFullAlias] = sprintf('%s(%s) AS %s__%s%s', $strFunctionName, $strColumnName, $this->strEscapeIdentifierBegin, $strFullAlias, $this->strEscapeIdentifierEnd);
    }

 public function UpdateQueryBuilder(QQueryBuilder $objBuilder)
 {
     $objBuilder->AddSelectFunction($this->strFunctionName, $this->objNode->GetColumnAlias($objBuilder), $this->strAttributeName);
 }