How to insert a string literal as a new column in an mdx query - sql

Question

In the following MDX query, I want to set the value of [Measures].[Label] as the string literal "Net Value" instead of NULL (i.e. using a string literal to populate the values in the label column). I'm scratching my head about how to do this in MDX. Tons of background with SQL, but a relative newbie with SSAS.
`WITH
Member [Measures].[Label] AS NULL
Member [Measures].[Value] AS [Measures].[Net Amt]
SELECT NON EMPTY
(
{[Time].[Quarter].[Quarter]},
{[Time].[Month].[Month]},
{[Time].[Work Week].[Work Week]},
{[Customer].[Region Cd].[Region Cd]},
{[Product].[Cd Nm].[Cd Nm]}
) ON Rows,
NON EMPTY
(
{
[Measures].[Value],
[Measures].[Label]
}
) ON Columns
FROM [Reporting]
WHERE
(
{
[Time].[Year].[Year].&[2022]:[Time].[Year].[Year].&[2023]
},
{[Segment].[Segment Nm].[Segment Nm].&[SEG VALUE]}
)`
If I try a value in double quotes, the query just times out without finishing. Just using a null like this only takes 2 seconds to return.
Member [Measures].[Label] AS "Net Amt"

Answer 1

The problem with putting a constant is that the NON EMPTY now returns every combination of Time, Customer and Product.
Instead you want to return a constant but only on rows where the Net Amt measure is not empty.
Member [Measures].[Label] AS IIF(Not(IsEmpty([Measures].[Net Amt])),"Net Amt",Null)
Alternately you could use a constant but use the NonEmpty function instead against the Net Amt measure only:
Member [Measures].[Label] AS "Net Amt"
Member [Measures].[Value] AS [Measures].[Net Amt]
SELECT NonEmpty(
{
{[Time].[Quarter].[Quarter]}*
{[Time].[Month].[Month]}*
{[Time].[Work Week].[Work Week]}*
{[Customer].[Region Cd].[Region Cd]}*
{[Product].[Cd Nm].[Cd Nm]}
},
[Measures].[Net Amt]
) ON Rows,
{
[Measures].[Value],
[Measures].[Label]
}
ON Columns