Easiest way to programmatically generate MDX rowcount query? - sql

Question

Right now I'm dealing with a program that can generate and return SQL or MDX queries (depending on the source database of the queries). I'm working on adding a feature that counts all the rows returned by a given query.
Now, I have some small background with SQL, so I was able to parse table names and generate a rowcount. However, MDX is a completely new beast for me.
In SQL, I'm creating:
SELECT
COUNT(SUM)
AS ROWS
FROM
(
COUNT(*) AS COUNT FROM TABLE1
UNION ALL
COUNT(*) AS COUNT FROM TABLE2
UNION ALL
COUNT(*) AS COUNT FROM TABLE3
ETC...
)
Now, what I'm wondering is, how would I do something similar with MDX? I've done some reading on MDX, and from what I gathered the basic notation is
[Dimension].[Hierarchy].[Level]
Now with SQL, I parsed the table names out of a larger generated query and simply inserted them into a new programmatically generated query. What would I have to grab from a larger MDX query to generate my own rowcounting query and sending it off to run? A simpler example of the MDX I'm dealing with would be:
WITH
MEMBER [BUSINESS1].[XQE_RS_CM1] AS '([BUSINESS1].[COMPANY_H].[all])', SOLVE_ORDER = 8
MEMBER [BUSINESS2].[XQE_RS_CM0] AS '([BUSINESS2].[all])', SOLVE_ORDER = 4
SELECT
NON EMPTY {[BUSINESS2].[ALL_TIME_H].[CALENDAR_YEAR_L].MEMBERS AS [XQE_SA1] , HEAD({[BUSINESS2].[XQE_RS_CM0]}, COUNT(HEAD([XQE_SA1]), INCLUDEEMPTY))} DIMENSION PROPERTIES PARENT_LEVEL, PARENT_UNIQUE_NAME ON AXIS(0),
NON EMPTY {[BUSINESS1].[COMPANY_H].[COMPANY_CD__L].MEMBERS AS [XQE_SA0] , HEAD({[BUSINESS1].[XQE_RS_CM1]}, COUNT(HEAD([XQE_SA0]), INCLUDEEMPTY))} DIMENSION PROPERTIES PARENT_LEVEL, PARENT_UNIQUE_NAME ON AXIS(1),
NON EMPTY {[Measures].[Measures].[BUSINESS3]} DIMENSION PROPERTIES PARENT_LEVEL, PARENT_UNIQUE_NAME ON AXIS(2)
FROM
[SOURCE] CELL PROPERTIES CELL_ORDINAL, FORMAT_STRING, VALUE
Any insight would be awesome, thanks.

Answer 1

At first glance your script looks reasonable then after unravelling it becomes a bit(!) more complex.
The main difference between this and other scripts is its use of axis(2). In a sub-select extra dimensions are often used but this is a little odd as most clients can't handle 3 dimensional cellsets - so I'm intrigued by what is consuming this info?
Also the member [BUSINESS1].[XQE_RS_CM1] is a single member as is [BUSINESS2].[XQE_RS_CM0] so what is the point of the sections HEAD... ?
WITH
MEMBER [BUSINESS1].[XQE_RS_CM1] AS
([BUSINESS1].[COMPANY_H].[all]), SOLVE_ORDER = 8
MEMBER [BUSINESS2].[XQE_RS_CM0] AS
([BUSINESS2].[all]), SOLVE_ORDER = 4
SELECT
NON EMPTY
{[BUSINESS2].[ALL_TIME_H].[CALENDAR_YEAR_L].MEMBERS AS [XQE_SA1]
,HEAD(
{[BUSINESS2].[XQE_RS_CM0]},
COUNT(
HEAD([XQE_SA1])
,INCLUDEEMPTY
)
)}
ON AXIS(0),
NON EMPTY
{[BUSINESS1].[COMPANY_H].[COMPANY_CD__L].MEMBERS AS [XQE_SA0]
,HEAD(
{[BUSINESS1].[XQE_RS_CM1]},
COUNT(
HEAD([XQE_SA0])
,INCLUDEEMPTY
)
)}
ON AXIS(1),
NON EMPTY
{
[Measures].[Measures].[BUSINESS3]
}
ON AXIS(2)
FROM
[SOURCE]
Does the following return the same data as the original script?
SELECT
NON EMPTY
{
[BUSINESS2].[ALL_TIME_H].[CALENDAR_YEAR_L].MEMBERS
,[BUSINESS2].[all]
}
ON 0,
NON EMPTY
{
[BUSINESS1].[COMPANY_H].[COMPANY_CD__L].MEMBERS
,[BUSINESS1].[COMPANY_H].[all]
}
ON 1
FROM [SOURCE]
WHERE [Measures].[Measures].[BUSINESS3];
All you need to calculate then is the count of members returned in the following set on the rows:
{
[BUSINESS1].[COMPANY_H].[COMPANY_CD__L].MEMBERS
,[BUSINESS1].[COMPANY_H].[all]
}