[Mondrian] query model 2.0 / named set performance?

Pedro Alves pmgalves at gmail.com
Fri Mar 23 17:28:47 EDT 2012


I use that technique a lot, never had problems or noticed performance impact 



-pedro

Paul Stoellberger <p.stoellberger at gmail.com> wrote:

Hi,

I've been tinkering with various options for the mdx we could use for an improved query model, and I was wondering if named sets had any (negative) impact on performance.
I just want to use them to simplify the mdx and improve its readability.

For each level I would create a separate set.
Basically the whole concept is very level based.... that way users can perform stuff like TopCount, Filter, ... on specific levels, or a level could be a period instead of specific members.

A query could e.g. look like this:

with 
set [ProductFamily] as '{[Product].[Food]}'
set [ProductDepartment] as 'Filter({[Product].[Food].[Dairy], [Product].[Food].[Meat]}, Ancestor(Product.CurrentMember,[Product Family]) in [ProductFamily])'
set [ProductCategory] as 'Filter({[Product].[Product Category].Members}, Ancestor(Product.CurrentMember,[Product Department]) in [ProductDepartment])'
set [ProductDimension] as 'Hierarchize({[ProductFamily], [ProductDepartment],[ProductCategory]})'
SELECT
NON EMPTY {[Customers].[All Customers]} ON COLUMNS,
NON EMPTY [ProductDimension] ON ROWS
FROM [Sales]



on an axis i would then just do something like:
SELECT [Dimension1] * [Dimension2] ON COLUMNS, .....


I was trying to figure out a way that would work with DrillDownLevel and/or DrillDownMember .... but unfortunately they can only drill down 1 level and i wanted this to be a more general solution.
Otherwise I would have definitely preferred that.


Any Input on this from anyone who has an opinion would be highly appreciated.

Thanks,
Paul

_____________________________________________

Mondrian mailing list
Mondrian at pentaho.org
http://lists.pentaho.org/mailman/listinfo/mondrian

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.pentaho.org/pipermail/mondrian/attachments/20120323/7062fe1f/attachment.html 


More information about the Mondrian mailing list