Pentaho Mondrian- Hide a dimension value from a role - mdx

Question

I am using Pentaho Mondrian to build a billing cube with the dimensions "country" and "reference".
To one of my roles, I just want to show the reference value when country is equal to "Brazil". If it is not Brazil, reference should be null.
How it is:
http://i.stack.imgur.com/yipPJ.png
How it should be:
http://i.stack.imgur.com/PoF2w.png
How can I do this?
I tryed to use a calculated member with CASE WHEN, but it didn´t work.
Should I use IIF instead?
I code this, but it is not working too:
WITH
MEMBER [dim_reference.Reference].[reference].Members AS
IIF
(
[dim_country.country].[country].CurrentMember = 'Brazil'
,[dim_reference.Reference].[reference].MEMBERS
,''
)
SELECT
NON EMPTY
{Hierarchize({[dim_country.country].[country].MEMBERS})} ON COLUMNS
,NON EMPTY
Order
(
{
Hierarchize({[dim_reference.Reference].[reference].MEMBERS})
}
,[dim_reference.Reference].CurrentMember.Name
,BASC
) ON ROWS
FROM [billing_entry];
Does someone knows how to do this?

Answer 1

A few pointers:
1
So you need to use the IS operator if you want to check for equality with a member.
Rather than this:
[dim_country.country].[country].CurrentMember = 'Brazil'
You use the following - you might need to amend the RHS with the exact full name of your Brazil member:
[dim_country.country].[country].CurrentMember
IS [dim_country.country].[country].[country].[Brazil]
2
Rather than using '' you should use NULL.
Rather than this:
IIF(
<condition>
,<if condition true>
,''
)
You should use this:
IIF(
<condition>
,<if condition true>
,NULL
)
3
You're correct to use IIF rather than CASE if at all possible - IIF generally performs better.
From your screenshots it looks to me that you want Countries ON ROWS rather than ON COLUMNS:
SELECT
NON EMPTY
{} ON COLUMNS
,NON EMPTY
[dim_country.country].[country].MEMBERS ON ROWS
FROM [billing_entry];
Now using SSAS against the AdvWrks cube I can do this:
WITH
MEMBER [Measures].[X] AS
IIF
(
[Customer].[Customer Geography].CurrentMember
IS
[Customer].[Customer Geography].[Country].&[Australia]
,[Product].[Product Categories].CurrentMember.Name
,null
)
SET [s] AS
[Customer].[Customer Geography].[Country]
*
[Product].[Product Categories].[category]
MEMBER [Product].[Product Categories].[All].[calc] AS
[Product].[Product Categories].CurrentMember.Name
SELECT
{[Measures].[X]} ON 0
,[s] ON 1
FROM [Adventure Works];
Which results in this: