How to use to temporary table make lookup function

public void lookup(FormControl _formControl, str _filterStr)
{
    ;

    //super(_formControl, _filterStr);
    CustRequestItemTable.InventDimId = InventDim::findOrCreate(inventDim).InventDimId;
    if (CustRequestItemTable.InventDimId != inventDim.InventDimId)
    {
        inventDim.data(InventDim::find(CustRequestItemTable.InventDimId));
        inventDim_ds.setCurrent();
    }
    YIP_CustRequestItemTable::lookupInventTransIdByItemDim(_formControl, CustRequestItemTable, CustRequestItemTable.joinChild());
}
--------------------------
public void modified()
{
    InventTrans     inventTransLocal;
    InventDimParm   inventDimParm;
    InventDim       inventDimJoin;
    InventDim       inventDimCriteria, inventDimCur;
    ;

    super();

    inventDimCriteria = CustRequestItemTable.joinChild();

    inventDimCriteria.clearNotActiveDim(CustRequestItemTable.inventTable().DimGroupId);
    inventDimParm.initFromInventDim(inventDimCriteria);
    inventDimParm.InventLocationIdFlag = Noyes::No;
    inventDimCriteria = InventDim::findOrCreate(inventDimCriteria);

    select firstonly inventTransLocal
        where inventTransLocal.InventTransId == CustRequestItemTable.InventTransId  &&
              inventTransLocal.StatusIssue   == StatusIssue::Sold                       &&
              inventTransLocal.TransType     == InventTransType::Sales
        #InventDimExistsjoin(inventTransLocal.InventDimId,inventDimJoin,inventDimCriteria, inventDimParm);
    if (!inventTransLocal)
    {
        inventDimParm.InventBatchIdFlag = Noyes::No;
        select firstonly inventTransLocal
            where inventTransLocal.InventTransId == CustRequestItemTable.InventTransId &&
                  inventTransLocal.StatusIssue   == StatusIssue::Sold                      &&
                  inventTransLocal.TransType     == InventTransType::Sales
            #InventDimExistsjoin(inventTransLocal.InventDimId,inventDimJoin,inventDimCriteria, inventDimParm);
    }
    if (!inventTransLocal)
    {
        inventDimParm.ConfigIdFlag = Noyes::No;
        select firstonly inventTransLocal
            where inventTransLocal.InventTransId == CustRequestItemTable.InventTransId &&
                  inventTransLocal.StatusIssue   == StatusIssue::Sold                      &&
                  inventTransLocal.TransType     == InventTransType::Sales
            #InventDimExistsjoin(inventTransLocal.InventDimId,inventDimJoin,inventDimCriteria, inventDimParm);
    }
    if (inventTransLocal)
    {
        inventDimCur = inventTransLocal.inventDim();
        if (inventDimCriteria.InventLocationId)
            inventDimCur.InventLocationId   = inventDimCriteria.InventLocationId;
        if (inventDimCriteria.inventBatchId)
            inventDimCur.inventBatchId      = inventDimCriteria.inventBatchId;
        if (inventDimCriteria.configId)
            inventDimCur.configId           = inventDimCriteria.configId;

        inventDimCur = inventDim::findOrCreate(inventDimCur);
        CustRequestItemTable.InventDimId    = inventDimCur.inventDimId;
        CustRequestItemTable.ItemId         = CustRequestItemTable.ItemId ? CustRequestItemTable.ItemId : inventTransLocal.ItemId;

        CustRequestItemTable.validateWrite();
    }
    if (CustRequestItemTable.InventDimId != inventDim.InventDimId)
    {
        inventDim.data(InventDim::find(CustRequestItemTable.InventDimId));
        inventDim_ds.setCurrent();
    }
}
-----------------------------
// VAR Changed by Xie Yu Fan.Fandy  
public static void lookupInventTransIdByItemDim(
    FormControl                 _formControl,
    YIP_CustRequestItemTable    _table,
    InventDim                   _inventDim)
{
    SysTableLookup          lookup  = SysTableLookup::newParameters(tablenum(SalesLine), _formControl);
    Query                   q       = new Query();
    queryRun                qr;
    QueryBuildDataSource    qbds, qbdsTrans, qbdsDim;
    QueryBuildRange         qbr;
    SalesLine               tmpTable, salesLine;
    set                     set = new set(types::String);
    ;

    qbds    = q.addDataSource(tablenum(SalesLine));
    qbds.addRange(fieldnum(SalesLine, ItemId)).value(_table.ItemId);
    qbr     = qbds.addRange(fieldnum(SalesLine, SalesStatus));
    qbr.value(queryValue(SalesStatus::Invoiced));//+","+queryValue(SalesStatus::Delivered));
    if (_table.CustAccount)
        qbds.addRange(fieldnum(SalesLine, CustAccount)).value(_table.CustAccount);
    if (_table.SalesId)
        qbds.addRange(fieldnum(SalesLine, SalesId)).value(_table.SalesId);
    if (_inventDim.inventBatchId || _inventDim.configId)
    {
        qbdsTrans = qbds.addDataSource(tablenum(InventTrans));
        qbdsTrans.addLink(fieldnum(SalesLine, InventTransId), fieldnum(InventTrans, InventTransId));

        qbdsDim = qbdsTrans.addDataSource(tablenum(InventDim));
        //qbdsDim.addLink(fieldnum(InventTrans, InventDimId), fieldnum(InventDim, InventDimId));
        qbdsDim.joinMode(JoinMode::InnerJoin);
        qbdsDim.relations(true);
        if (_inventDim.inventBatchId)
            qbdsDim.addRange(fieldnum(InventDim, InventBatchId)).value(_inventDim.inventBatchId);
        if (_inventDim.configId)
            qbdsDim.addRange(fieldnum(InventDim, configId)).value(_inventDim.configId);
    }

    tmpTable.setTmp();

    qr = new queryRun(q);
    while (qr.next())
    {
        salesLine = qr.getNo(1);
        if (!set.in(salesLine.InventTransId))
        {
            tmpTable.SalesId        = salesLine.SalesId;
            tmpTable.InventTransId  = salesLine.InventTransId;
            tmpTable.CustAccount    = salesLine.CustAccount;
            tmpTable.ItemId         = salesLine.ItemId;
            tmpTable.SalesQty       = salesLine.SalesQty;
            tmpTable.SalesPrice     = salesLine.SalesPrice;
            tmpTable.SalesStatus    = salesLine.SalesStatus;
            tmpTable.doinsert();
            set.add(salesLine.InventTransId);
        }
    }
    if (set.elements())
    {
        lookup.addLookupfield(fieldnum(SalesLine, InventTransId),true);
        lookup.addLookupfield(fieldnum(SalesLine, CustAccount));
        lookup.addLookupfield(fieldnum(SalesLine, SalesId));
        lookup.addLookupfield(fieldnum(SalesLine, ItemId));
        lookup.addLookupfield(fieldnum(SalesLine, SalesQty));
        lookup.addLookupfield(fieldnum(SalesLine, SalesPrice));
        lookup.addLookupfield(fieldnum(SalesLine, SalesStatus));
        lookup.parmTmpBuffer(tmpTable);
        lookup.performFormLookup();
    }
    else
    {
        lookup.addLookupfield(fieldnum(SalesLine, InventTransId),true);
        lookup.addLookupfield(fieldnum(SalesLine, CustAccount));
        lookup.addLookupfield(fieldnum(SalesLine, SalesId));
        lookup.addLookupfield(fieldnum(SalesLine, ItemId));
        lookup.addLookupfield(fieldnum(SalesLine, SalesQty));
        lookup.addLookupfield(fieldnum(SalesLine, SalesPrice));
        lookup.addLookupfield(fieldnum(SalesLine, SalesStatus));

        lookup.parmQuery(q);
        lookup.performFormLookup();
    }
}