在SSAS表格中的DAX度量中使用SUMX时，如何删除来自用户选择的行上下文？

Question

如何从SUMX中删除行上下文，以使其包含正在迭代的表变量的所有记录？

我尝试了此操作，但没有效果（用FILTER包裹表以说出“所有期间日期值”）–最终仍不是我想要的：

SUMX(FILTER(varCoverageTableYTD
     , ALL('Equipment Cost on Rent With Branch'[PeriodDate])

     ,    DIVIDE([Days on Rent with Branch], [Billable Days with Branch]) 
       *
  DIVIDE([Billable Days with Branch], [Total Days with Branch]) 
       * 
'Equipment Cost on Rent With Branch'[EquipmentCostForCORMeasure_CCUR]

     ))

我以前采用了不同的方法。我曾经认为我的问题是过滤器上下文，所以将其删除。这样做之后，我假设它是继承行上下文的SUMX迭代器。

这里是完整的度量定义。我相信我已经将问题隔离到SUMX（正如我已经描述过的）。但是，显示整个定义的代码可能会有好处：

// Convert the user selected period into Begin and End Dates


   VAR varLastDateYTD = LASTDATE(DATESYTD('Calendar'[Calendar Date]))
   VAR varFirstDateYTD = DATE(YEAR(varLastDateYTD), 1, 1)




// Remove the filter context which is coming from the user selection


   VAR varCoverageTableAllDates = CALCULATETABLE('Equipment Cost on Rent With Branch'
                            
                               , ALL('Equipment Cost on Rent With Branch'[PeriodDate])
                              )



// Filter the table to the calculated Begin and End Dates


   VAR varCoverageTableYTD = FILTER(varCoverageTableAllDates
                                     
                             , 'Equipment Cost on Rent With Branch'[PeriodDate] <= varLastDateYTD

                            && 'Equipment Cost on Rent With Branch'[PeriodDate] >= varFirstDateYTD
                              )



// Iterate over the new table, calculating on a per row basis.

// Does SUMX get a row context from the user selection? 
// My result is limited to the user selected period.


   RETURN SUMX(varCoverageTableYTD,
         
, DIVIDE([Days on Rent with Branch], [Billable Days with Branch]) 
        *
  DIVIDE([Billable Days with Branch], [Total Days with Branch]) 
        * 
'Equipment Cost on Rent With Branch'[EquipmentCostForCORMeasure_CCUR]
  
        )