MDX : How to use filter on a dimension without showing it OR merge 2 attributes of the same dimension?

Question

Hello everyone,
I'm kind of newbie with MDX language, I'm trying to get filtered measures from a cube with a specific layout.
Here is my exemple :
I want to get all the "order numbers" where the "invoice" cost is more than 300.  Each invoice is linked with an ID, one order number can have several invoices.
So what I do is a select request with 2 dimensions : "order num" and "id_invoice"
Here is the result : I get all the cost sorted by "order num" and I can easealy identify those who are above 300
order num
Id_invoice
cost
Total
Total2
15450307
10032013094498
1671
1737
ok
15450307
10032013099835
66
1737
KO
15450596
10032013094078
8524
8524
ok
15451214
10032013094119
228
4348
KO
15451214
10032013097069
978
4348
ok
15451214
10032013097071
3142
4348
ok
15542434
10032013101736
142
142
KO
15550064
10032013097016
1261
1261
ok
15550346
10032013097586
2252
2252
ok
15550353
10032013098446
2617
2617
ok
What i need : In "cost", I need to have the sum of each cost which are above 300 in one line (without showing the invoice id)
order num
cost
Total
Total2
15450307
1671
1737
ok
15450596
8524
8524
ok
15451214
4120
4348
ok
15550064
1261
1261
ok
15550346
2252
2252
ok
15550353
2617
2617
ok
How is it possible to use a filter on a dimension without showing it or merge 2 attributes of the same dimension ?
The problem is that if I show "id" column, the filter doesn't work properly : it compares 300 with the total cost of the whole order and does not compare with each invoice (which could be under 300 ! - see "KO" in Total2 column)
Here is the request I use to generate this result :
with
member [Measures].[Total]
as (
[TP].[ID INVOICE].[All],
[TP].[ORDER NUM].currentmember,
[Measures].[COST]
member [Measures].[Total2]
as (
IIF([Measures].[COST] >
300, "ok",
"KO")
select
{[Measures].[COST],[Measures].[Total],[Measures].[Total2]}
on
columns,           
Filter
             [TP].[ORDER NUM].[ORDER
NUM].members *
             [TP].[ID INVOICE].[ID
INVOICE].members
             ,[Measures].[COST]
> 0
on
rows
FROM [MYCUBE]
Thank you  for your help !
Kind regards,
Olivier.

Answer 1

Hi Olivier,
hereunder a similar query against the AW. For all order numbers, we sum all lines above 30 without diplaying the line numbers:
WITH
MEMBER [Measures].[lines above 30] AS
IIF(
[Measures].[Internet Sales Amount] > 30,
[Measures].[Internet Sales Amount],
null
MEMBER [Measures].[aggr lines above 30] AS
SUM(
exists(
[Internet Sales Order Details].[Sales Order Line].[Sales Order Line],
[Internet Sales Order Details].[Sales Order Number].currentmember
[Measures].[lines above 30]
SELECT
[Measures].[Internet Sales Amount],
[Measures].[aggr lines above 30]
} ON 0,
[Internet Sales Order Details].[Sales Order Number].[Sales Order Number] ON 1
FROM ( SELECT
[Product].[Category].[All Products] ON 0,
[Internet Sales Order Details].[Sales Order Number].&[SO51177]:
[Internet Sales Order Details].[Sales Order Number].&[SO51178]
} ON 1
FROM [Adventure Works] )
I reduced the cube with a subselect.
Philip,