MDX Ordering By Dimension - sorting

Question

Over in the SQL side, my data is looking like this:
Select f.id, f.TimeKey,t.CalendarYearMonth
from FactSubmission f
inner join DimTime t on t.TimeKey = f.TimeKey
order by f.Id asc
Sorting from MDX we have descending
SELECT
NON EMPTY ORDER(
[DimTime.CalendarYearMonth].[CalendarYearMonth].Members,
[DimTime.CalendarYearMonth].CurrentMember.Properties("MEMBER_KEY"),
DESC
) ON COLUMNS
FROM [PSE_FactSubmission]
And Ascending
The January dates aren't at the top of either sort, which suggests I'm sorting by the FactSubmission.ID key instead of DimTime.CalendarYearMonth
Is this how things are supposed to work? I'd like to pull back Jan,Feb,March.
DimTime.CalendarYearMonthNum is a column with data in the form 201501,201502,201503 etc. Here's an attempt at using this column to to sort the CalendarYearMonth data.
Debugging Query to Select Keys
NonEmpty Query

Answer 1

Try ordering using a different property:
SELECT
NON EMPTY ORDER(
[DimTime.CalendarYearMonth].[CalendarYearMonth].Members,
[DimTime.CalendarYearMonth].CurrentMember.Properties("MEMBER_Value"),
DESC
) ON COLUMNS
FROM [PSE_FactSubmission];
or maybe this:
SELECT
NON EMPTY ORDER(
[DimTime.CalendarYearMonth].[CalendarYearMonth].Members,
[DimTime.CalendarYearMonth].CurrentMember.MEMBERValue,
DESC
) ON COLUMNS
FROM [PSE_FactSubmission];
In the above you should be good using DESC - sometimes you need to break the underlying hierarchical ordering by adding a B i.e. BDESC
From here I cannot see MEMBER_VALUE: http://mondrian.pentaho.com/documentation/mdx.php
...but there is a function .VALUE so maybe try the following:
SELECT
NON EMPTY ORDER(
[DimTime.CalendarYearMonth].[CalendarYearMonth].Members,
[DimTime.CalendarYearMonth].CurrentMember.Value,
DESC
) ON COLUMNS
FROM [PSE_FactSubmission];
Strange that the key doesn't work. What values do you get if you run something like this?
WITH MEMBER [KEYcheck] AS
[DimTime.CalendarYearMonth].CurrentMember.Properties("MEMBER_KEY")
//[DimTime.CalendarYearMonth].CurrentMember.MEMBER_KEY
//[DimTime.CalendarYearMonth].[CalendarYearMonth].CurrentMember.MEMBER_KEY
//[DimTime].CurrentMember.MEMBER_KEY
SELECT
[KEYcheck] ON 0,
[DimTime.CalendarYearMonth].[CalendarYearMonth].Members ON 1
FROM [PSE_FactSubmission];

Answer 2

You are doing an alphabetical sort. February->January->March.
For doing a sort based on the month number, there needs to be a field which maps January-1, February-2, March-3.
If you have such a column in cube, use that to to sort. If not create a calculated member like below -
WITH MEMBER Measures.CalendarMonth AS
CASE [DimTime.CalendarYearMonth].CurrentMember
WHEN [DimTime.CalendarYearMonth].&[January] THEN 1
WHEN [DimTime.CalendarYearMonth].&[February] THEN 2
WHEN [DimTime.CalendarYearMonth].&[March] THEN 3
END
SELECT
NON EMPTY ORDER(
[DimTime.CalendarYearMonth].[CalendarYearMonth].Members,
Measures.CalendarMonth,
DESC
) ON COLUMNS
FROM [PSE_FactSubmission]
EDIT for Andrew
with member Measures.[MonthNum] as
NonEmpty
(
[DimTime.CalendarYearMonthNum].[CalendarMonthNum].members,
([DimTime.CalendarYearMonth].[CalendarYearMonth].currentmember, Measures.foo)
).item(0).membervalue
select
non empty
order
(
[DimTime.CalendarYearMonth].[CalendarYearMonth].members,
Measures.[MonthNum],
desc
) on rows
from [PSE_FactSubmission]
EDIT - with EXISTS
with member Measures.[MonthNum] as
EXISTS
(
[DimTime.CalendarYearMonthNum].[CalendarMonthNum].members,
[DimTime.CalendarYearMonth].[CalendarYearMonth].currentmember,
"SomeMeasureGroup"
).item(0).membervalue