Filters on Dense Dimensions

In the past I have always stayed away from creating filters ondense dimensions. My fear is that it will severy slow downthe response time to the database. I apologize for any spelling inssues as my browser is not likingthe java application that runs this forum.

Hi sweeks, I use filters on accounts dimension, which is normally densedimension. I had not seen any sluggish behaviour in response timeof database after placing filter on dense dimension. I am eager to know if any one has this issue. ----------- [email protected]

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How to make a calc script on a dense dimension ?

Dears,
I want to make a calculation script on a dense dimension where :
- I want to get an input from a member, then make a mathematical calculation , then populate the result in another member at the same dimension .
For More Clarification :
I have the following fix
CALC ALL ;
FIX ("SAR","Working.V01","Budget2012","FY12","G_10","NM_CAT01","Employee General","BegBalance")
"Internal Transportation" = "Monthly Transportation"*30 ;
ENDFIX
-Internal transportation and monthly transportation are 2 members on FB_account dimension (dense dimension) .
Waiting for your response, Thanks in advance.

Dear ,
I appreciate your feedback . But, My problem is that after executing the calc script , No calculation happens .
by another means ,
-If I wrote "Internal transportation" = 500 ; --> It put 500 in it
-If I wrote "Internal transportation" = "Internal transportation" * 100 ; --> No calculation happened but it executed successfully
-if I wrote "Internal transportation" = "Monthly transportation" = 500; --> No calculation happened but it executed successfully
I don't know Why ???

Why to open Block only with Dense dimension Member ???

Hi All,
I want to understand the logic behind opening the block with dense member. Generally we open the block with member of dense dimension by fixing the sparse members
e.g. below considering C1, P1,Working,Actual are members of sparse dimension customer, product, Version, Scenario.
Fix(C1,P1,Working,Actual)
Jan
IF(Some condition)
Calculation on Account Member
ENDIF
Now if i change the code as below making Jan in FIX and opening the block with Actual. How it will affect the performance. The Number of iterations in total number of datacells will be same in bothe cases above and below then why to give priority to dense dimension member for opening the block.
Fix(C1,P1,Working,Jan)
Actual
IF(Some condition)
Calculation on Account Member
ENDIF
ENDFIX
I know the logic behind keeping sparse dimension member in FIX but here i think keeping 'Actual' member for opening the block is also a type of fix which will tell the code to do the calculation only for blocks of 'Actual'.
In 1st case i have fixed the number of blocks containing members C1,P1,Working,Actual and by keeping Jan for opening block means Jan is also fixed for the particular application means code will not run for feb march etc.
Means code will run for C1->P1->Working>Actual->Jan
In 2nd case also i have fixed C1,P1,Working,Jan and by keeping Actual for opening block means Actual is also fixed for the particular application means code will not run for other members of Scenarion dimension.
Means code will run for C1->P1->Working>Jan->Actual
Then what is the difference??? Why it will effect performance???

when using an IF statement in a calc script you have to specify a member to associate it with for the calc member block. This is like temporarily assigning it to that member as a formula in the outline. In most cases calculations on dense dimensions can work faster as the block is in memory. Remember that a block statement can have multiple calculation statements in it. When this occurs, having the calculations on a dense member can speed it up as it may not have to swap blocks to do the calculation.
Also consider that if a sparse combination of members does not exist, the block will not exist and there will be no attempt to do the calculations. If a sparse member is on the calc member block, it will cycle through all of the sparse members looking to do the calculation.

Populated dense dimension member failed ?

Hi,
I have a scenario dimension which is dense with this member : Actual and Budget, and I would like to copy Budget to Actual.
Actual member are already populated on month M1, M2, M3
ACTUAL BUDGET
M1 100
M2 200
M3 300
I wrote a HBR like this :
Fix(M1:M3,other sparse dimension member)
Budget = Actual
ENDFIX
but only M3 has been populated
ACTUAL BUDGET
M1 100
M2 200
M3 300 300
I don't understand why because datablock already exist for M1, M2, M3.
I tried to use CREATEONMISSINGBLOCK ON but didn't change anything.
So I changed my script with a datacopy like this :
Fix(M1:M3,other sparse dimension member)
Datacopy Actual to Budget;
ENDFIX
And now it work
ACTUAL BUDGET
M1 100 100
M2 200 200
M3 300 300
But I don't understand why my first script failed ?
Regards
Benjamin

when using an IF statement in a calc script you have to specify a member to associate it with for the calc member block. This is like temporarily assigning it to that member as a formula in the outline. In most cases calculations on dense dimensions can work faster as the block is in memory. Remember that a block statement can have multiple calculation statements in it. When this occurs, having the calculations on a dense member can speed it up as it may not have to swap blocks to do the calculation.
Also consider that if a sparse combination of members does not exist, the block will not exist and there will be no attempt to do the calculations. If a sparse member is on the calc member block, it will cycle through all of the sparse members looking to do the calculation.

Member block component only select dense dimension members

I used Calculation Manager to create Business Rule for Planning app. The Member Block component only show dense dimensions. Why?

Its trying to force you to write the calculation optimally. Calculations with sparse member blocks are much slower than dense dimension blocks. Even if you cannot select, you can always type in the sparse dimension member name. You dont need to use member selector.

Is having large no. of child in dense dimension ideal?

we have a BSO application in which some of the dense dimension have over 1500 members in them, is it ideal?
the hierarchy is not too flat but still there are some parents which have over 200 children.. i read somewhere that BSO throws error if the no. of children exceed 100.. is that statement true?

It doesn't throw an error, it throws a 'warning', which you can ignore. In a dense dimension it is unlikely be a performance problem (sparse is a bigger deal), but it might be hard for users to navigate.
A dense dimension with 1500 members is not problem in itself. Whether it's ideal or not is pretty hard to answer from what you've posted. How did you decide which dimensions to make dense? Do you actually have a performance problem or are you asking out of curiosity (not that there's anything wrong with that)?

Are there any implications on changing a dense dimension to sparse?

We have some calculation performance issues where our calc is taking a long time to run. We have 6 dimensions, Scenario, Period/Months, Years, Currency, Market, and Accounts. Market and Accounts are the only Sparse members. We tried to make Years sparse (through research, although all the years have data), and the calculation time improved significantly. My question is, will this change have any implications on retrieval or data load?
Here's our calc:
Agg(Accounts, Market)

The short answer is 'yes', it may have implications, and you will have to test to figure out what they are.
'Years' is a classic candidate to be a sparse dimension (as is 'Scenario'). But your cube design sounds unusual, at least in my experience, which may or may not be for good reasons. So it's all but impossible to make predictions or recommendations without knowing more about the cube and the input dataset.
Incidentally, the simple fact that all years have some data doesn't in itself make Years a candidate for a dense dimension (which is what you seem to be implying). Within reasonable limits of block size, you want to select dense and sparse dimensions such that when data exists at a sparse intersection, the largest possible proportion of dense combinations are populated. Just for example, if you have Product, Region, Account and Period dimensions and your company sells only a small proportion of Products in any given Region, Account and Period are likely good candidates to be Dense dimensions: Where data does exist for a Product / Region combination, many Account / Period combinations are filled. Region and Product are likely poor candidates for Dense dimensions, because almost all Region / Product combinations are empty even where data exists for an Account / Period. So the simple fact that all Products have some data doesn't make Product a good dense candidate.
Hope this is of some use... :)

Outline Ordering of Dense Dimensions

To optimize your cube I understand that you first have your dense dimensions at the top of the outline then your sparse with few members, then sparse with most members and last your attribute dimension. But didn't find any provision of which order a dense dimension should be? Should the dense dimension with few members be at the top or dense dimension with most members?TIA

The recommended configuration is the "hourglass" shape - largest dense to smallest, smallest sparse to largest. Personally, I can understand the sparse dimension ordering - it has an impact on the efficiency of the calculator cache, but I have not seen any documentation or experienced significant performance gains by changing the order of dense dimensions.That being said, changing the order of dense dimensions WILL have an impact on the calculation order, which may be important if you have certain types of formulas or dependencies in your dense dimensions.The thing to keep in mind about optimization is that the order of the dimensions in your outline is probably lower on the list of priorities, behind the sparse/dense settings, optimizing scripts, using dynamic calcs, intelligent calc, etc.Regards,Jade---------------------------------Jade ColeSenior Business Intelligence ConsultantClarity [email protected]

Dense dimension aggregation

Hi All,
Is it possible to only aggregate and avoid calculation on dense dimension. I just want to get the aggregated values at the top level and avoid calculation.
AGG("Account"); is not working. essbase is accepting only CALC DIM.
Is there any command which only aggregates dense dimension?

Ah, OK. Is the dense member you have problems with a dynamic calc member, or is it a stored formula member? In either case, is the formula sensitive to month (i.e. why does it calculate a different value in Jan vs Dec, despite the fact that you have copied the same data)?
Incidentally, the reason I was talking about performance etc is that improved calculation performance is the usual motivation to use AGG vs CALC DIM.

Default member when filtering on a dimension in excel

Hi,
Many of my users have asked for a way of selecting "Month to date" that can remain in place without having to physically change the month in a date hierarchy. I came up with a way of doing it by creating a pseudocolumn "Current Month"
which shows a "Y" if it matches today's month and an N for all other rows. This has worked effectively, however now i am being asked if it could show "Month YYYY" as opposed to the "Y".
My issue with this is having a default member auto selected in a filtered dimension. I am not sure if this is possible.
I have tried setting a current month dimension member to non aggregateable and then forcing a default member, but that is global without even selecting anything.
Can anybody think of any other way of making the field automatically select when filtered? (Obviously this is necessary because if it says March, and then when it turns into April the data changes and the selection cancels).
Hoping somebody has an idea!
thanks

Hi,
Thanks for the great suggestion. I applied this, but once i did it complained about a duplicate attribute, so i added another key to make it unique but once you do that it shows all months and years in the selection - ideally i want it to just show
the current month in the selection (otherwise it is no different to selecting a month from a regular date hierarchy).
I will continue to work on this idea though because there could be a solution in there!
Thanks

Sibling count calculation ignoring filtering from other dimensions.

Hi.
I have an issue whereby including my calculated measure in a pivot returns more rows that I've filtered by.
So within my Account dimension I have a few attributes, one being a 'Parent Acct Id' and another the 'Child Acct Id'. I have setup the hierarchy accordingly and then created my measure as below
[Measures].[Linked Accounts] AS COUNT([Account].[My Hierarchy].CURRENTMEMBER.SIBLINGS)
Then if I select my 'Child Acct Id' on rows then my calculated measure does correctly show the number of siblings. However the problem arises when I want to reduce the result set by an attribute from another dimension (e.g. a country name from a 'Country'
dimension) - doing this has no affect on the rows returned.
I should mention that if I filter on another attribute within the 'Account' dimension then that DOES filter as required. So it's behaving that my calculated measure only works
with selections from within the slice that I'm doing the sibling count on.
So I don't understand why the CURRENTMEMBER function doesn't work as it should.
Any ideas?
Thanks
Dave

Hi Dave,
You can't filter Dimension_1 members by selecting Dimension_2 members. It's normal cube behavior.
Try use nonempty function with measure. For example:
[Measures].[CalcMember] AS nonempty([Employee].[Employees].currentmember.siblings,[Measures].[Reseller Sales Amount])
So you can count nonempty siblings using other dimensions in filter. I hope that is you need.
Best regards.

Load data filtering on a dimension's member - ESSCMD MaxL

Hi.
I would like to load data filtering records on a dimension's member. Referring as example to Sample's database outline, I would like to load only records with product 100-10.
I know that I can use Select command from Record 's rule menu in Administration Console; however, I would like to use ESSCMD or Maxl to do the same.
Is it possible? Any issue?
Thanks a lot in advance.

No it's not possible. The selection/rejection criteria are in the load rules and you can't pass parameters to them.
I think in 9.3.1 you could put a substitution variable in a load rule but have not tried it yet. If so, you could add that to MaxL to update the variable then use the load rule to load the data. You will have to try it as I have not done so yet.

Filtering on a dimension table

Hi all,
I am trying to bring in a field from a dimension table-to be used in my mapping. This is based on a condition.(All attributes belong to the same level in the dimension).
I brought in the dimension using the 'dimension' operator and tried to 'filter' on the condition and then connect the field from source to target. I get this error:
API 8003: Connection target attribute group is already connected to an incompatible source. Use a joiner or set operator to join the upstream data first before connecting it into this operator.
Any suggestions?
Thanks.

Hi,
I am already doing that. I connected the dimension(through a filter) to a lookup operator, and then to the target table.
I get this error when I validate:
VLD-1104: Attributes flowing into DEDUP_SRC_0:INOUTGRP1 have different data sources.
Any suggestions?
Thanks,

Expanding Dimension Members Filtered by another Dimension members property.

I use BPC for SAP NetWeaver 7.5.
Iu2019ve FI_ Acc dimension. And on the property FLOWTYPE, I define which FLOW types it uses.
FI Acc dimension members as follows:
Cash   (FLOWTYPE: Cashflows)
Treade Receivales (FLOWTYPE: TRflows)
Trade Payables (FLOWTYPE: TPflows)
FLOW dimension members as follows:
    Cas_flows (PARENTH1)
       Cash Openning
       Cash In
       Cash Out
       Cash from Credit
TR_flows (PARENTH1)
    TR Openning
    TR addition from sales
    TR recived
TP_flows (PARENTH1)
    TP Openning
    TP addition from purchases
    TP paid
I want to expand FI_ Acc dimension and according to its FLOWTYPE property it expands FLOWs next to it as follows:
FI_ Acc              FLOW
CASH                      Cash Openning
                               Cash In
                               Cash Out
                               Cash from Credit
Trade Receivables    TR Openning
                                  TR addition from sales
                                  TR recived
Trade Payables        TP Openning
                                 TP addition from purchased
                                 TP paid
I have one EVEXP which expands FI_Acc dimension and another EVEXP which expands FLOW dimension. On the FILTER I write [FLOW].currentmember.properties("PARENTH1")=[FI_Acc].currentmember.properties("FLOWTYPE")
I could not get the result. Where do I make mistake? Is there someone can help me on this issue?
Or is there any other way to do this?
Edited by: Recep Budak on Nov 4, 2010 12:25 PM

Hi Bike,
According to your description, you want to add another dimension attribute based on the record dimension name, right? If in this case, you can use Case When statement to achieve it. Here is a sample query for your reference.
With Member [Measures].[Test]
As
Case [Product].[Category].CurrentMember.Name
When [Product].[Category].&[4].Name Then "4"
When [Product].[Category].&[1].Name Then "1"
When [Product].[Category].&[3].Name Then "3"
When [Product].[Category].&[2].Name Then '2'
Else "Null"
End
Select {[Measures].[Test]} on columns,
[Product].[Category].[Category].members on rows
from [Adventure Works]
Results
Regards,
Charlie Liao
If you have any feedback on our support, please click
here.
Charlie Liao
TechNet Community Support

Business Rule - Filtering based on dimension

Hi,
I am trying to copy data from one scenario/version to another scenario/version based on account member(smartlist) value.I am currently unable to achieve this result.
/* Copy the data from Begin Scenario to Final Scenarioo
based on the vendor status*/
FIX(@Relative(Year))
"Begin Scenario"
IF (("Vendor Status" == [[VENDOR_STATUS.NEW]]) OR
("Vendor Status" == [[VENDOR_STATUS.ACTIVE]]) OR
"Begin Scenario"->"Working Version" = "Final Scenario"->"Working Version";
ENDIF
ENDFIX
In this example,"Vendor Status" is an account member of the type smartlist. I would like to filter data based on "Vendor Status" as I copy from
one scenario/version to another scenario/version. The above rule is not copying any data.
Kindly advice.
Thanks,
Cz

Hi,
Try out the following way
FIX(@Relative(Year,0))
"Begin Scenario"
IF (("Vendor Status" == 1) OR
("Vendor Status" == 2) OR
"Begin Submission"->"Working Version" = "Final Scenario"->"Working Version";
ENDIF
ENDFIX
/* Assuming Smart List Value of Vendor_Status.New=1 & Vendor_Status.Active=2 */
As in backend ( i.e Essbase) the smart list values are stored in numerical.
Cheers!!

Filters on Dense Dimensions

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