The daily Axapta WTF

[axm2017]

strange russian code

            vendTrans       = this.transBuffer();
            vendTransOpen   = this.transOpenBuffer();

            while select sum(AmountMST) from vendTransOpen
                group by RefRecId
                where vendTransOpen.AccountNum  == this.AccountNum
                   && vendTransOpen.TransDate   >= _fromDate
                   && vendTransOpen.TransDate   <= _toDate
                join  vendTrans
                    where vendTrans.RecId       == vendTransOpen.RefRecId
                       && (vendTrans.Invoice    != ''
                       || (vendTrans.Invoice    == '' && vendTrans.AmountMST    < 0))
            {
                openBalanceMST += vendTransOpen.AmountMST;
            }

из openInvoiceBalanceMST в табличке VendTable.