Query object not working as expected?

问题

This code should be able to run on any AX system (change item & warehouse). The issue is that CustInvoiceJour is not being returned sometimes. What is odd, is if I just do a "select custInvoiceJour" with the same relations, it DOES find it? How is this possible?

static void Job59(Args _args)
{
    CustInvoiceTrans            custInvoiceTrans;
    CustInvoiceJour             custInvoiceJour;
    InventTable             inventTable;
    QueryBuildRange             rangeItem;
    Query                       query;
    QueryBuildDataSource        qbds1;
    QueryBuildDataSource        qbds2;
    QueryBuildDataSource        qbds3;
    QueryRun                    qr;
    ;

    query = new Query();
    qbds1 = query.addDataSource(tablenum(CustInvoiceTrans));
    qbds2 = qbds1.addDataSource(tablenum(CustInvoiceJour));
    qbds2.relations(true);

    qbds2.addRange(fieldnum(CustInvoiceJour, SalesType)).value('!' + enum2str(SalesType::ReturnItem));
    rangeItem = qbds1.addRange(fieldnum(CustInvoiceTrans, ItemId));
    qbds1.addRange(fieldnum(CustInvoiceTrans, InvoiceDate)).value(queryRange(@'8/1/2011', @'8/31/2011'));
    qbds2.orderMode(OrderMode::OrderBy);
    qbds2.addOrderByField(fieldnum(CustInvoiceJour, DlvCountryRegionId));
    qbds2.addOrderByField(fieldnum(CustInvoiceJour, DlvState));
    qbds3 = qbds1.addDataSource(tablenum(InventDim));
    qbds3.relations(true);
    qbds3.joinMode(JoinMode::ExistsJoin);
    qbds3.addRange(fieldnum(InventDim, InventLocationId)).value(SysQuery::value('FG'));


    select firstonly inventTable
        where inventTable.ItemId    == '44831';

    info (strfmt("%1", inventTable.ItemId));
    rangeItem.value(inventTable.ItemId);

    qr = new QueryRun(query);
    while (qr.next())
    {
        custInvoiceTrans    = qr.get(tablenum(CustInvoiceTrans));
        custInvoiceJour     = qr.get(tablenum(CustInvoiceJour));

        if (!custInvoiceJour)
        {
            info ("Not found");
            select firstonly custInvoiceJour
                where custInvoiceJour.SalesId               == custInvoiceTrans.SalesId     &&
                      custInvoiceJour.InvoiceId             == custInvoiceTrans.InvoiceId   &&
                      custInvoiceJour.InvoiceDate           == custInvoiceTrans.InvoiceDate &&
                      custInvoiceJour.numberSequenceGroup   == custInvoiceTrans.numberSequenceGroup;
            if (custInvoiceJour)
                info("Found it");
        }
    }
}

The debugger shows these as the queries:

NAME:
    qbds1
VALUE:
    SELECT * FROM CustInvoiceTrans ORDER BY CustInvoiceJour.DlvCountryRegionId ASC, CustInvoiceJour.DlvState ASC WHERE ((ItemId = N'44831')) AND ((InvoiceDate>={ts '2011-08-01 00:00:00.000'} AND InvoiceDate<={ts '2011-08-31 00:00:00.000'})) EXISTS JOIN * FROM InventDim WHERE CustInvoiceTrans.InventDimId = InventDim.inventDimId AND ((InventLocationId = N'FG'))

NAME:
    qbds2
VALUE:
    SELECT * FROM CustInvoiceJour WHERE CustInvoiceTrans.SalesId = CustInvoiceJour.SalesId AND CustInvoiceTrans.InvoiceId = CustInvoiceJour.InvoiceId AND CustInvoiceTrans.InvoiceDate = CustInvoiceJour.InvoiceDate AND CustInvoiceTrans.numberSequenceGroup = CustInvoiceJour.numberSequenceGroup AND ((NOT (SalesType = 4)))


NAME:
    qbds3
VALUE:
    SELECT * FROM InventDim WHERE CustInvoiceTrans.InventDimId = InventDim.inventDimId AND ((InventLocationId = N'FG'))

回答1:

Your qbds1 value doesn't show JOIN * FROM CustInvoiceJour WHERE ... (joined qbds2).

Add qbds2.fetchMode(QueryFetchMode::One2One); to your code and everything should be alright.

P.S. I would suggest to do it the other way round: CustInvoiceJour in qbds1, and CustInvoiceTrans in qbds2 (with default fetchMode), then you wouldn't have this problem at all.

来源：https://stackoverflow.com/questions/12322979/query-object-not-working-as-expected