SSAS Cube 中多维表达式（MDX）计算的未知错误

Question

我刚拿到一个关于 SSAS 多维数据集和多维表达式的项目交接。有一个用Visual Studio写的计算：

(StrToMember(
"[DIM Time_V3].[Year -  Week -  Date].[Month].&["+
MID(MemberToStr([DIM Time_V3].[Year - Month - Day].CurrentMember)
,44,11)+"T00:00:00]"),[Plan Revenue])

此公式因未知原因无效（Excel 数据透视表显示#VALUE！在此公式下）。

我把上面的公式在SSMS中转换成MDX查询：

SELECT 
[Measures].[Plan Revenue] ON COLUMNS,
StrToMember(
              "[DIM Time_V3].[Year -  Week -  Date].[Month].&[" 
              + MID(MemberToStr([DIM Time_V3].[Year - Month - Day].CurrentMember),44,11) 
              + "T00:00:00]"
            ) ON ROWS
FROM [FR_ACCOUNTING 3]

出现错误提示“'T00:00:00' 字符串无法转换为日期类型”。然后我尝试了以下脚本：

SELECT  [Measures].[Plan Revenue] ON COLUMNS,
        [DIM Time_V3].[Year -  Week -  Date].[Month] ON ROWS
FROM [FR_ACCOUNTING 3]

这里是上述查询结果的随机成员：

Caption Manufacturing Period 1, 2023
Name    [DIM TIME_V3].[Year -  Week -  Date].[Month].&[2023-01-03T00:00:00]
UniqueName  [DIM TIME_V3].[Year -  Week -  Date].[Month].&[2023-01-03T00:00:00]
Description 
LevelName   [DIM TIME_V3].[Year -  Week -  Date].[Month]
LevelDepth  3
DrilledDown False
ParentSameAsPrevious    False
ChildCount  4

SELECT  [Measures].[Plan Revenue] ON COLUMNS,
        [DIM Time_V3].[Year - Month - Day].[Manufacturing Month] ON ROWS
FROM [FR_ACCOUNTING 3]

这里是上述查询结果的随机成员：

Caption Manufacturing Period 1, 2023
Name    [DIM TIME_V3].[Year - Month - Day].[Manufacturing Month].&[2023-01-03T00:00:00]
UniqueName  [DIM TIME_V3].[Year - Month - Day].[Manufacturing Month].&[2023-01-03T00:00:00]
Description 
LevelName   [DIM TIME_V3].[Year - Month - Day].[Manufacturing Month]
LevelDepth  2
DrilledDown False
ParentSameAsPrevious    False
ChildCount  28

我还尝试了以下代码，看看硬编码而不是 MID 函数是否可以返回一些东西：

SELECT 
[Measures].[Plan Revenue] ON COLUMNS,
StrToMember(
              "[DIM Time_V3].[Year -  Week -  Date].[Month].&["
              + "2022-01-03"
              + "T00:00:00]"
            ) ON ROWS
FROM [FR_ACCOUNTING 3]

但是，只返回一列空值： 最后，我尝试了以下代码：

--Check if MID function works for manufacturing calendar
SELECT 
[Measures].[Plan Revenue] ON COLUMNS,
StrToMember(
              "[DIM Time_V3].[Year -  Week -  Date].[Month].&[" 
              + MID(MemberToStr([DIM Time_V3].[Year - Month - Day].CurrentMember),44,11) 
              + "]"
            ) ON ROWS
FROM [FR_ACCOUNTING 3]

结果说“The '' string cannot be converted to the date type”。 我很好奇 MID 函数如何工作以及我们如何提取成员的子字符串。非常感谢解决我的问题。