[Mondrian] RE: Same hierarchy on different axis

Brian Vandenberg phantall at gmail.com
Mon Jul 20 14:59:46 EDT 2009

  Ah, I should probably clarify there.  I skimmed what Julian wrote, sorry.
It would be nice if you could have the same hierarchy on multiple axes, I
was trying to express my enthusiasm toward the change Julian mentioned.

  If we could get both, all the better.


On Mon, Jul 20, 2009 at 12:52 PM, Pedro Alves <pmgalves at gmail.com> wrote:

> Just to check - Brian, do you agree it does *not* make sense to allow the
> same hierarchy in multiple axis? :(
> On 07/20/2009 03:37 PM, Brian Vandenberg wrote:
>>   I agree 100% on this.  Just being able to use multiple (unique)
>> hierarchies across multiple axes would be very convenient.
>> -Brian
>> On Fri, Jul 17, 2009 at 12:37 PM, Julian Hyde <jhyde at pentaho.com
>> <mailto:jhyde at pentaho.com>> wrote:
>>    I don't think it makes sense to allow the same hierarchy on two
>>    different axes. What does make sense is what AS2005 does. They have
>>    'attribute hierarchies' which look a lot like levels except they can
>>    be used independently. But you still have old-fashioned hierarchies
>>    with multiple levels. And typically, an attribute that is used as a
>>    level would also have its own attribute hierarchy.
>>    E.g. the customer dimension might have a customer hierarchy, a state
>>    attribute hierarchy, a city attribute hierarchy, and a gender
>>    attribute hierarchy. You can have customer hierarchy on one axis,
>>    and state on another. But you can't have the customer hierarchy on
>>    two different axes.
>>    Hope that makes sense. If anyone has a good reference to attribute
>>    hierarchies, please share it. 'MDX Solutions', by Spofford et al.,
>>    explains it well, but I can't hyperlink a book sitting on my desk. :)
>>    Julian
>>    PS Sorry to hear about your motherboard.
>>  ------------------------------------------------------------------------
>>        *From:* Pedro Alves [mailto:pedro.alves at webdetails.pt
>>        <mailto:pedro.alves at webdetails.pt>]
>>        *Sent:* Friday, July 17, 2009 7:56 AM
>>        *To:* jhyde at pentaho.com <mailto:jhyde at pentaho.com>
>>        *Subject:* Same hierarchy on different axis
>>        Hey.
>>        Sorry to reply to you directly; I was replying to the ML when my
>>        server's motherboard crashed, and now I have a nasty problem to
>>        solve. I will when I get it back, but wanted to reply to you
>>        since you told you might do some work on that issue
>>        You said that it will give error if members from the same
>>        hierarchy are used in different axis. Can this NOT happen?
>>        Better than explain, I'll show you why it's important for me:
>>        I attached 3 pictures of the designer I'm working in. I would
>>        like users to make the combinations they want. In that example,
>>        the user defined 2 selectors, one for the year and another for
>>        the market; Now he wants to do 2 charts - clients and countries
>>        (countries are in the same dimension as markets, just a
>>        different level).
>>        It would make my job much easier if I could just abstract what's
>>        displayed from what's being filtered; output.png shows the final
>>        result, of course, reflects a mondrian exception related to the
>>        same hierarchy being in 2 axis.
>>        IMHO it should be up to the users the responsibility to make
>>        sure he doesn't use weird combinations (like select
>>        [Countries].[Portugal] on 0, [Countries].[USA] on 1)
>>        Thanks
>>        --
>>        Pedro Alvespedro.alves at webdetails.pt  <mailto:
>> pedro.alves at webdetails.pt>
>>        WebDetails Consultingwww.webdetails.pt  <http://www.webdetails.pt>
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