TSQL + MDX using OPENQUERY() - column names do not exist - sql-server

Question

I have a view against a OPENQUERY() which gets data from a SSAS cube.
MDX query looks like this:
WITH MEMBER [Measures].[Measure1] AS
(--calculation)
SELECT
{[Measures].[Measure1]}
ON 0,
NON EMPTY ([Dim1].[Dim_key].[Dim_key], [Dim2].[Dim_key].[Dim_key])
ON 1
FROM [Cube]
WHERE ([Dim3].[Hierarchy].[Level].[Member])
My problem is that when the WHERE filter results in 0 rows the view does not work, with error:
Invalid column name '[Dim1].[Dim_key].[Dim_key].[MEMBER_CAPTION]'.
Since its using the column name to have a GROUP BY
How can I force it return at least one row? Or always return the column names?
I cannot remove the NON EMPTY since whole set takes about 1 min to load.
So far I've tried these solutions:
MDX - Always return at least one row even if no data is available
Force mdx query to return column names
but it seems like it does not work since I have a where condition on another dimension.

Answer 1

Managed to figure it out. Added this measure which essentially replicates Dim1 members returned on the rows:
WITH MEMBER [Measures].[Measure1] AS
(--calculation)
MEMBER [Measures].[Dim_Key] AS
[Dim1].[Dim_key].CurrentMember.Member_Key
SELECT
{[Measures].[Measure1]
,[Measures].[Dim_Key]}
ON 0,
NON EMPTY ([Dim1].[Dim_key].[Dim_key], [Dim2].[Dim_key].[Dim_key])
ON 1
FROM [Cube]
WHERE ([Dim3].[Hierarchy].[Level].[Member])
So even if there are no rows I get the new measure back as one of the columns. If there are rows I get two additional columns (which have row tags) but I just don't use them in the view