src/Data/Tools/BizDataObj_SQLHelper.php
protected function getNewDataSqlObj($dataObj = null)
    {
        if ($dataObj) {
            $doName = $dataObj->objectName;
            if (!isset($this->_dataSqlObjList[$doName])) {
                $this->_dataSqlObjList[$doName] = new BizDataSql();
            }
            $this->_dataSqlObj = $this->_dataSqlObjList[$doName];
        } else {
            $this->_dataSqlObj = null;
            $this->_dataSqlObj = new BizDataSql();
        }
        return $this->_dataSqlObj;
    }
protected function getNewDataSqlObj($dataObj = null)
    {
        if ($dataObj) {
            $doName = $dataObj->objectName;
            if (!isset($this->_dataSqlObjList[$doName])) {
                $this->_dataSqlObjList[$doName] = new BizDataSql();
            }
            $this->_dataSqlObj = $this->_dataSqlObjList[$doName];
        } else {
            $this->_dataSqlObj = null;
            $this->_dataSqlObj = new BizDataSql();
        }
        return $this->_dataSqlObj;
    }
Get new BizDataSql object and store on internal variable (current object)

@return BizDataSql