Древовидная структура источников данных в Query

[Wamr]

PHP код:

    Query                   query;
    QueryBuildDataSource    qbDS1, qbDS2;
    ;

    query = new Query();

    qbDS1 = query.addDataSource(tableNum(InventTable));

    qbDS2 = qbDS1.addDataSource(tableNum(InventItemLocation));
    qbDS2.addLink(fieldNum(InventTable, ItemId), fieldNum(InventItemLocation, ItemId));
    qbDS2.joinMode(JoinMode::EXISTSJOIN);
    qbDS2.fetchMode(0);
    info(qbDS1.toString());

    qbDS2 = qbDS1.addDataSource(tableNum(InventTableModule));
    qbDS2.addLink(fieldNum(InventTable, ItemId), fieldNum(InventTableModule, ItemId));
    qbDS2.joinMode(JoinMode::EXISTSJOIN);
    qbDS2.fetchMode(0);
    info(qbDS1.toString());