Using a tempDB table in a Query

static void TempDB(Args _args)

{

    PurchLineMarkTmp    tmpUnionedResult;

    InventTable         inventTable;

    InventTableModule   inventTableModule;

    Query               query;

    QueryRun            queryRun;

    // Execute insert_recordset with TempDB table as a target

     insert_recordset tmpUnionedResult(PurchLine)

        select RecId from inventTable

            exists join inventTableModule

                where   inventTableModule.ModuleType == ModuleInventPurchSales::Sales

                    && inventTable.ItemId == inventTableModule.ItemId

                    && inventTableModule.Price != 0; 

    query = new query();

    query.addDataSource(tableNum(PurchLineMarkTmp));

    queryRun = new QueryRun(query);

    // Force queryRun to fetch from the right temporary table

    queryRun.setRecord(tmpUnionedResult);

    // Iterate all registered quantities

    while (queryRun.next())

    {

        tmpUnionedResult   = queryRun.get(tablenum(PurchLineMarkTmp));

        info (strFmt('%1', tmpUnionedResult.PurchLine));

    }

}

source: http://mafsarkhan.blogspot.com/2013/07/example-for-using-tempdb-table-in-query.html