MDX Running total on every date member - ssas

Question

I use the following MDX calculation to get the stock value per day:
SUM({NULL:[Date].[Calendar Hierarchy].CURRENTMEMBER} * [Measures].[Qty])
However this is giving me the following result
Date QtyOnHand
1/1/2015 10
4/1/2015 15
5/1/2015 16
Mark that the dates 2/1/2015 and 3/1/2015 are not shown, because there are no transactions on them.
I would like to get these shown to get the following result:
Date QtyOnHand
1/1/2015 10
2/1/2015 10
3/1/2015 10
4/1/2015 15
5/1/2015 16
How can I adjust my MDX statement to this?

Answer 1

Does IsEmpty help?
SUM(
{NULL:[Date].[Calendar Hierarchy].CURRENTMEMBER}
* IIF(
IsEmpty([Measures].[Qty])
,0
,[Measures].[Qty]
)
)
If it helps then it won't help performance.
I've tested the above and unsure why you do the cross-join inside the Sum - more standard is just to use the second argument.
This AdvWrks script is an example of your scenario i.e. there are gaps in the data:
SELECT
{[Measures].[Internet Sales Amount]} ON 0
,{
[Date].[Calendar].[Date].&[20050801]
:
[Date].[Calendar].[Date].&[20051201]
} ON 1
FROM [Adventure Works];
Here is the query using IsEmpty (with IIF):
WITH
MEMBER [Measures].[roll] AS
Sum
(
{[Date].[Calendar].[Date].&[20050801] : [Date].[Calendar].CurrentMember}
,IIF
(
IsEmpty([Measures].[Internet Sales Amount])
,0
,[Measures].[Internet Sales Amount]
)
)
SELECT
{[Measures].[Internet Sales Amount],[Measures].[roll]} ON 0
,{
[Date].[Calendar].[Date].&[20050801]
:
[Date].[Calendar].[Date].&[20051201]
} ON 1
FROM [Adventure Works];
Some of the results are the following:
So in your scenario I think this is very similar:
SUM(
{NULL:[Date].[Calendar Hierarchy].CURRENTMEMBER}
, IIF(
IsEmpty([Measures].[Qty])
,0
,[Measures].[Qty]
)
)