Multiple hierarchies in a dimension

Hi,
I have created a time dimension with several heirarchies using OWB 9.2. I want to have several cubes attached to this dimension, but I want each cube to only have access to a specific hierarchy, i.e. not all the hierarchies.
I cannot see a method within OWB and I am not aware of any specific DML command.
Does anyone know how this can be achieved?
Thanks.

This is an interesting issue. In OLAP terms a dimension key must and can only be represented by one value. That value will never change unless new data is loaded. So to implement the hierarchies you have listed:
Top/Group/Division/Product
Top/Division/Product/Group
Top/Product/Division/Group
you will need separate and unique keys at each level for each hierarchy, except for 'Top' which can be shared across all the hierarchies and whose value is constant across all levels and hierarchies. The examples you list above do not really make sense as Product Groups cannot roll up to Products. Typically you might do something like this:
Standard Time
Year
Quarter
Month
Week
Day
Fiscal Time
Fiscal Year
Fiscal Quarter
Month
Week
Day
So in this case day/week/month rollup into a new level called fiscal quarter. Alternatively you could have a retail calendar
Year
Month
Week Number
Day
Where week number is between 1-53, and weeks roll-up to months. Now in this case the level Months could be implemented as month number (1-12) or as Jan-Dec. Using Jan-Dec it could be possible for the dimension keys to contain different results compared to the standard time hierarchy keys. At this point the hierarchy would break down and the wrong results would be generated. So the only solution would be to implement a new level for both Month and also year as this could also potentially generate different aggregated results:
Retail Year
Month Number
Week Number
Day
So you need to be very careful about defining and sharing levels across different hierarchies.
Hopefully, that makes sense?
Business Intelligence Beans Product Management Team
Oracle Corporation

Similar Messages

Multiple Hierarchies in one dimension - comments?

multiple hierarchies
Hi Experts,
I'd like your comments on my implementation of multiple hierarchies in one dimension.- especially if this can be done in a way that:
a) still enables users to choose the hierarchy in a dashboard prompt
b) reduces maintenance to a minimum
The dimension groups ages into several different groups like the example below:
Hierarchy1 Hierarchy2
Age......Groups........Groups.....
0........0-2...........0-5
1........0-2...........0-5
2........0-2...........0-5
3........3-5...........0-5
4........3-5...........0-5
75.......70-75.........70-80
76.......76-80.........70-80
Right now I've implemented this by defining one dimension having one hierarchy:
Total
....Hierarchy
.......Group
.........Age
The underlying logical table is based on several logical table sources (LTS) - one for each hierarchy as shown in the first example(Hierarchy1, Hierarchy2).Every LTS has a fragmentation definition filtering on values on 'hierarchy-level'.
Columns in the logical table (and of course in the underlying LTS) are:
Column               mapped to hierarchy-level
- Hierarchy          Hierarchy
- Hierarchy_id          Hierarchy
- Group          Group
- Group-id          Group
- Age               Age
Advantages:
A answers / dashboard user can select one or more hierarchies by using a dashboard prompt.
Adding a new hierarchy (a new grouping) doesn't need changes in the dimension itself
Disadvantages:
A new grouping needs manual steps to implement
- a new physical table
- a new LTS attached to the logical table (including the fragmentation content)
Thanks for your time and comments
Regards
Andy

multiple hierarchies
Hi Experts,
I'd like your comments on my implementation of multiple hierarchies in one dimension.- especially if this can be done in a way that:
a) still enables users to choose the hierarchy in a dashboard prompt
b) reduces maintenance to a minimum
The dimension groups ages into several different groups like the example below:
Hierarchy1 Hierarchy2
Age......Groups........Groups.....
0........0-2...........0-5
1........0-2...........0-5
2........0-2...........0-5
3........3-5...........0-5
4........3-5...........0-5
75.......70-75.........70-80
76.......76-80.........70-80
Right now I've implemented this by defining one dimension having one hierarchy:
Total
....Hierarchy
.......Group
.........Age
The underlying logical table is based on several logical table sources (LTS) - one for each hierarchy as shown in the first example(Hierarchy1, Hierarchy2).Every LTS has a fragmentation definition filtering on values on 'hierarchy-level'.
Columns in the logical table (and of course in the underlying LTS) are:
Column               mapped to hierarchy-level
- Hierarchy          Hierarchy
- Hierarchy_id          Hierarchy
- Group          Group
- Group-id          Group
- Age               Age
Advantages:
A answers / dashboard user can select one or more hierarchies by using a dashboard prompt.
Adding a new hierarchy (a new grouping) doesn't need changes in the dimension itself
Disadvantages:
A new grouping needs manual steps to implement
- a new physical table
- a new LTS attached to the logical table (including the fragmentation content)
Thanks for your time and comments
Regards
Andy

Multiple Hierarchies from Single Dimension Table in OBIEE-11g?

Is it possible to have Multiple Hierarchies from Single Dimension Table in OBIEE-11g?
Like 1)Year-Qtr-Month-Weeks 2)Year-Month-Days

Hi,
or if your lowest level is the same like
Day->month->year->Total
Day->businessMonth->businessyear->Total
Then yes, it is.
Create the first, then you start to create the second by adding your top(business year) level on the same level as the one you have (year) both under your total.
Then when you would add your second base level, there is a special option for it, something like use other hierarchy level/shared level (sorry can't recall and does not have a connection right now) then you select your existing day level under your businessmonth level.
Hope this helps,
Regards,
D

Hyperion Planning : multiple hierarchies for a dimension ?

Hi,
Is it possible into planning 9.2 to manage multiple hierarchies for a dimension ?
I didn't found that in the documentation but I had already listened that there is a workaround to do that.
Regards

Hi,
I would like for the entity dimension used two differents hierarchies (two differents relation Parent/child), one for example used by the accounting service and an other used by the sale service.
The level0 member are the same but parents are differents in these two hierarchies.
It's something possible to do into OFA or EPB and I would like to do the same into Hyperion. planning.
Regards

Defining multiple hierarchies for single dimension in Administrator?

Hello,
We are attempting to define multiple hierarchies in a single dimension in Administrator. The following two examples are representative use cases for what we're trying to do:
DateDim
----By Calendar Quarter
--------By Calendar Month
------------By Week
----------------By Day
----By Fiscal Quarter
--------By Fiscal Month
----By Calendar Month
--------By Week
Note that "By Calendar Month" can't really be a shared level because we do not want to include "By Day" in the third hierarchy.
ServiceLocationDim
----By Sales Region
--------By State
------------By City
----By State
--------By City
------------By Zip
----------------By Store
Note again that "By State" can't be a shared level because its children differ in the two hierarchies.
The goal is to have multiple drilldown paths supported. If there is a different way to do this in Administrator that does not use hierarchies, that would be acceptable.
Can anyone point me in the right direction?
Thanks,
Matt Warden
Balanced Insight, Inc.
http://www.balancedinsight.com

Hi,
when defining multiple hierarchies in a dimension, the lowest level needs to be the same for each hierarchy...that's a prerequisite.
But I think you can define them this way...and restrict your 'drill' level on your fact table...as I think you will have a different aggregation level overthere.
So for your dimension you'll set the logical level on the lowest level and in your fact you can play with the logical level depending on to the drill level?
Can that help you?
A.

Query selected levels of multiple hierarchies of one dimension

Hi to all.
I have created through AWM 11 a customer dimension with two hierarchies as follows.
SLM_HIER: All Customers -> Salesman -> Customer
GEO_HIER: All Customers -> State -> City -> Customer
I have also created a SALES_CUBE (measures: QUANTITY, VALUE, aggregation: SUM) that is dimensioned with Customer dim.
I'm using OBIEE to query the OLAP engine (through the relational views that AWM created automatically). I have followed the OTN OBE tutorials.
I would like to have the following query on the cube:
Give me QUANTITY where SALESMAN=S1 and CITY in ('Athens','Rome').
Is it possible to have such a query? As far as I understand there are no ready aggregated data for selected levels of both hierarchies.
Thank you very much.
Chris

I think OBIEE would also give you your answer from OLAP.
This query has filters defined from both the hierarchies and hence OBIEE would (should) automatically service this query from the highest common level b/w the hierarchies (in this case: base/leaf level - Customer). As a result of this, if CUST is your Customer dimension, OBIEE (at least, the older style of obiee modeling with olap) would introduce the security filter CUST_LEVEL = 'Customer'. Granularity of the resultset returned would be per individual Customer. 1 record per Customer satisfying the criteria SALESMAN='S1' and CITY in ('Athens','Rome').
Ideally you should include the Cust Id, Quantity columns in your obiee answers report and use an internal answers object/view like a Pivot View to hide Customer details column and get a localized aggregation performed over the resultset returned from OLAP to get the consolidated Quantity. Answers table has data at Customer level, Answers Pivot can show the required result.
Note1: The Cube cannot have this result pre-calculated since its a contradictory combination of filters across hierarchies. Level specific aggregate values calculated (or pre-calculated) in the cube for Salesman level (h1) would contain Customers from all cities (h2) and similarly City level (h2) Aggregates would contain Customers of all Salesmen (h1).
Note2: I believe OBIEE modeling with OLAP suffers from some issues relating to multiple hierarchies (e.g: if you have filter from non-default hierarchy CITY in ('Athens','Rome') alone, i think it would still fetch the results from lowest common level Customer instead of from City level directly).
HTH
Shankar

Multiple hierarchies for one dimension

Hi
I'm building a repository with The administration tool of OBIEE. the data source is an Oracle 10g datawarehouse created with OWB.
There is a geographic dimension with 4 different hierarchies and I want to create the same hierarchies in my repository.is it possible with OBIEE??
NB: The 4 hierarchies share some of the logical columns.
Thanks

Hi...
Are you looking for This
Just try.. it
Thanks & Regards
Kishore Guggilla

How does Disco handle multiple hierarchies in dimension from OWB?

Hi,
I have a ROLAP cube developed with OWB. All the dimensions have only one hierarchy at the moment. I derive the EUL from this cube.
One of the dimensions now need another hierarchy. Does anyone know how Discoverer handles multiple hierarchies in a dimension? How would you be able to choose which hierachy to use in a Disco worksheet? Can you actually use multiple hierarchies or only the hierachy set as the default?
Thanks

Hi,
Yes, you can set up multiple hierarchies in Discoverer for the same EUL items. When you drill down you have the option to select which hierarchy you use.
Rod West

Reporting on Multiple Hierarchies (with EvDRE)

Hi all,
I have a question regarding multiple hierarchies in one dimension. So if we have one member that belongs to different hierarchies:
1) can we access it with EvDRE? (I've tried it without success).
2) if not, how can we report accessing the appropriate value (that is, accessing the appropriate hierarchy?)
I would like to be able to access its value and setting up an expansion based on both hierarchies.
Regards,
Rafa

Dear All,
I am New to SAP-BPC.
I am working on financial budget Appication. I created dimensions and uploaded successfully.
I and generated reports.
Now iam prolbem is. I am preparing below reports in BPC-Excel-->Drag & Drop EvDRE Grid.
My report is showing something like below:
BudgetItems   |    Yr-2007 | Yr-2008 |
Publice_Sector|    200     |   220     |
Pvt_Sector      |    400     |   440     |
But i need some thing like below
BudgetItems    |    Yr-2007 | Yr-2008 | Change | % Change |
Publice_Sector |     200     |     220     |      20       |           |
Pvt_Sector       |     400     |     440     |      40       |            |
Here i think i have to write formulas with EvDRE.
Can anyone help me...
Thanks a lot in Advacne..!
MyGmail: satish.mba.sap
Thanks & Regards,
Satish.

Dimension Design - Single Dimension with Multiple Hierarchies

Morning,
the purpose of this discussion is to understand how we should design a specific dimension with 3 levels and multiple hierarchies for optimal performance.
We have an institution dimension with the following characteristics:
Characteristics
Dimension: Institution
Levels:
1. Total Bank (TB) Level
2. Peer Group (PG) Level
3. Institution Level
Hierarchies:
1. Some of the hierarchies have 3 levels and others have only 2 levels (Skip Level)
2. ALL the hierarchies have a TB level and an Institution level
3. None of the hierarchies have the same leafs
4. Some of the hierarchies leafs can overlap
Design:
We are considering two approaches for the institution dimension levels:
a)
Levels:
Hierarchy 1 TB Level
Hierarchy 1 PG Level
Hierarchy 1 Inst Level
Hierarchy 2 TB Level
Hierarchy 2 Inst Level
Hierarchy 3 TB Level
Hierarchy 3 Inst Level
Note:
This approach is working and the resulting dimension and cubes are used by OBIEE, but some of the OBIEE analysis takes a long time (more than a minute) to return the results.
At this point, we are not sure whether this approach will result in an optimal design from a performance perspective and are looking at restructuring the dimension to represent only the three conceptual levels as indicated below.
b)
Levels:
1. Total Bank (TB) Level
2. Peer Group (PG) Level
3. Institution Level
The rest of the dimension i.e. hierarchies, attributes and mappings are defined in the same way.
The cube associated with this dimension have approximately 80 million records.
Please advise on any best practices or design considerations that we need to take into account.
Thanks

No, it is not possible to have multiple hiearchies in a PC logical dimension.
The concept of the Parent-Child (PC) hierarchy is completely different from the level-based hierarchy. Specifically the PC hierarchy expects a predefined / architected table with corresponding PC column/value structuring with or without attributes.
Short story even shorter it is not possible.
Longer...
In the RPD the BMM actually prevents you from adding a new logical level, child level, or parent level when you have selected that the logical dimension be a parent child logical dimension with Parent-Child hierarchy.
On another note...
Have you tried architecting/building your PC source table so that it represents the roll-up and bottom child-levels like you are seeking? That is, that same member in the child column more than once having a separate parent value. That should be doable.
That was a great question, please award points if this answered your question or it was helpful.
Cheers,
Christian
http://www.artofbi.com

Multiple hierarchies single dimension single report

I am trying to add multiple hierarchies from a single dimension in a single report. To create the hierarchy in BI admin I followed the instructions found here
Oracle BI EE 10.1.3.3/2 &#8211; One Dimension &#8211; Multiple Hierarchies &laquo; Business Intelligence &am…
and here
https://forums.oracle.com/thread/2440305
My Patient hierarchy looks like the this
All Patients->Gender->Patient ID
All Patients->Age Group->Patient ID
When I drag and drop the second hierarchy in the Criteria Oracle BI Answers says the following "...you can only add one hierarchy per dimension to a report". I deduct that what I am trying to do is not possible!:-)
Q1: Is this feature indeed not supported or am I doing something wrong?
Q2: If this is not supported can someone explain why?
Version Oracle Business Intelligence 11.1.1.6.0

a) Reporting across levels of 2 hierarchies is not supported. As explained below, you cannot use OLAP to get aggregate values at cross combination of levels from hierarchies: H1 and H2.
However if you wish to, you can report at the lowest level, Patient, common to both hierarchies and display the Age Group as well as Gender attributes corresponding to each patient. This becomes reporting at Patient/lowest level. You can of course use the capabilities of the reporting tool like obiee to use a Pivot object (say) and exclude Patient columns like Id, name etc. and get obiee to perform localized summaries within the reporting layer and get summarizations of interest. OBIEE Pivot measures allow for aggregation using Min, Max, Sum, Count, Running Sum etc. OLAP facilitates this solution but does not particularly help in the aggregation (since aggregation is now being done in obiee and not as per cube definition rules in olap aw). It acts as a source for information at the lowest level stored in the cube. Some performance degradation would result but it may be acceptable/manageable depending on the data volumes/report criteria.
NOTE: For workaround/solution, use the regular fields, not hierarchical columns, from OBIEE presentation layer.
b) Not supported: OLAP Cubes contain pre-calculated (or dynamically calculated) summaries at various level of each hierarchy. This aids in faster reporting performance. Allowing 2 hierarchies at the same time defeats this feature/goal. A cross combination of levels across different hierarchies requires a dynamic recalculation of the detail records to get the right values for, say, Age Group: 30-39 and Gender: Male. H1 summaries at AgeGroup level for Age Group: 30-39 cover all genders and cannot be split up into male/female w/o recalculation. Similarly H2 summaries at Gender level for Gender: Male cover all age groups. Splitting it up is not possible except via workaround/ solution explained in (a).
Hope that helps.

Multiple Hierarchies in Dimension

Hi All,
I have a scenario, where I need to design a dimension with multiple hierarchies, is there a best practice on this ? I have about 6 hierarchy in one dimension. Could any share some idea and thoughts.
Thasnks
Zan

Hi,
Technically, there is no restriction on the number of hierarchies in a dimension. However, SAP suggests to have 3 dimensions for the performance sake. So, you can have 6 hierarchies. But, you should check the performance of the data retrieval.
Hope this helps.

SSM7.5 - Dimension with Multiple Hierarchies

Hi all,
I'm facing here one problem in the SSM front-end when I'm trying to use one the possibilities that PAS database offers, in this case the use of a dimension with multiple hierarchies.
As you can see in this image, the dimension is created in PAS and works without problems in the dataview.
Hierarchy one:
[http://img121.imageshack.us/img121/334/pas1y.jpg]
Hierarchy two:
[http://img831.imageshack.us/img831/2586/pas2.jpg]
In the SSM front-end, when I try to use that dimension, by default appears the first hierarchy:
[http://img826.imageshack.us/img826/4043/hier3.jpg]
In the dimensional selector the dimension appears fine for the first hierarchy:
[http://img30.imageshack.us/img30/3103/hier1.jpg]
But when I select the second hierarchy...
[http://img34.imageshack.us/img34/1722/hier2.jpg]
The Internet Explorer crashes and close all the open windows. This happens in the scorecard and also in the reports.
Is not possible to use dimensions with multiple hierarchies in SSM? Did anyone had this problem before?
Thanks in advance
Pedro
Edited by: Pedro S. Costa on Sep 13, 2010 11:03 AM

Hi Shashi,
first of all, thanks for your answer.
But I don't understand when you say that "we cannot have two hierarchies on the same dimensions"?!?!?
I already have some years of experience with PAS database and it's not the first time I create a dimension with more than one hierarchy. I use also that in a productive system (before this SSM front-end) without problems. And in this latest version of PAS (version 7.5.6) it's still possible to use that feature. As you can see in my initial post, I put two screen shots of the dimension with two hierarchies in PAS dataview, and works fine, without problems in the drill-down/up.
From PAS online help:
HIERARCHY is a Dimension command that defines the members and levels that comprise a particular hierarchy level within a dimension. It also allows multiple consolidation structures that stem from a central root of inputs. Use hierarchies when the input members are consolidated into more than one output member. When a dimension has hierarchies, members can have more than one path for rolling up into output levels. If a dimension has only one hierarchy, no HIERARCHY statement is necessary.
Based on this, I create my example of a dimension (named MULTI) with two hierarchies (REGION and TYPE). Maybe the name I use for the second hierarchy create some confusion to you, because of the TYPE dimension that can exist in SSM. I just hope the problem I'm having in the SSM front-end is not related with the name I used for the second hierarchy!!!!
I will rename that and test again.
Regards
Pedro

OBIEE Parent-Child Dimension with multiple hierarchies

Is it possible to have in a parent-child dimension multiple hierarchies? I want to have the same botom childs to aggregate to different parrents. example.
Account Dimension
HR1-total
HR1-parrent1
CHILD1
HR1-parrent2
CHILD2
HR2-total
HR2-parrent1
CHILD1
CHILD2
Thanks in advance.

No, it is not possible to have multiple hiearchies in a PC logical dimension.
The concept of the Parent-Child (PC) hierarchy is completely different from the level-based hierarchy. Specifically the PC hierarchy expects a predefined / architected table with corresponding PC column/value structuring with or without attributes.
Short story even shorter it is not possible.
Longer...
In the RPD the BMM actually prevents you from adding a new logical level, child level, or parent level when you have selected that the logical dimension be a parent child logical dimension with Parent-Child hierarchy.
On another note...
Have you tried architecting/building your PC source table so that it represents the roll-up and bottom child-levels like you are seeking? That is, that same member in the child column more than once having a separate parent value. That should be doable.
That was a great question, please award points if this answered your question or it was helpful.
Cheers,
Christian
http://www.artofbi.com

Using HLEVEL Property with Multiple Hierarchies

Hello,
I am trying to use the HLEVEL property on a dimension to indent the rows different amounts. Easy stuff, except I'm doing a row expansion on hierarchy 3 (H3). Using EVPRO(AppName, MemberID, "HLEVEL") always returns the HLEVEL from H1. If you select the same member ID in the member selector under different hierarchies and click the Properties button you can see a different value for HLEVEL, but I can't figure out how to get that in a report using EVPRO.
Is there a way to tell EVPRO specifically which hierarchy to use when returning the value for HLEVEL?
Thanks!
Paul Petersen
Akili

Mike,
please check the answer in this other post:
EVPRO with multiple hierarchies
It's for the MS platform, but it's the same for Netweaver.
EVPRO can only retrieve the HLEVEL for the first hierarchy. You need to maintain further custom properties if you want to get the level of a member within multiple hierarchies.
Regards,
Simmaco

Multiple hierarchies in a dimension

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