[kashperuk]

Что вы точно упустили, так это QueryFetchMode

    QueryBuildDataSource qbds1, qbds2, qbds3, qbds4, qbds5;
    Query query = new Query();
    qbds1 = query.addDataSource(tableNum(InventJournalTrans));
    qbds2 = qbds1.addDataSource(tableNum(InventDim));
    qbds2.addLink(fieldNum(InventJournalTrans, InventDimId), fieldNum(InventDim, InventDimId));
    qbds2.fetchMode(QueryFetchMode::One2One);
    qbds3 = qbds2.addDataSource(tableNum(InventLocation));
    qbds3.addLink(fieldNum(InventDim, InventLocationId), fieldNum(InventLocation, InventLocationId));
    qbds3.addRange(fieldNum(InventLocation, InventLocationId)).value('?');
    qbds3.fetchMode(QueryFetchMode::One2One);
    qbds4 = qbds1.addDataSource(tableNum(InventDim));
    qbds4.addLink(fieldNum(InventJournalTrans, ToInventDimId), fieldNum(InventDim, InventDimId));
    qbds4.fetchMode(QueryFetchMode::One2One);
    qbds5 = qbds4.addDataSource(tableNum(InventLocation));
    qbds5.addLink(fieldNum(InventDim, InventLocationId), fieldNum(InventLocation, InventLocationId));
    qbds5.addRange(fieldNum(InventLocation, InventLocationId)).value('?');
    qbds5.fetchMode(QueryFetchMode::One2One);
    info(query.dataSourceNo(1).toString());

Но я бы не советовал дальше еще расширять этот запрос, потому что после определенного числа источников и FetchMode не спасет.