data warehouse - Is it possible to have conditional OLAP dimension aggregators? -


i have set of olap cubes, in form of snow-flake schema, each representing 1 factory.

i have 3 concepts factories behave 3 dimensions, , other factories behave 2 dimensions.

the concepts same: "products", "sales agents" , "customers".

but cases, doubt if should model purely 3 dimensional cube or should play around tweak or trick 2 dimensional cube.

cases , b ones clear me, , case c 1 generates wonderings.

case a: 3 dimensional cube

any agent can sell product company. several agents resposible same set of customers.

i model case this:

enter image description here

case b: 2 dimensional cube

every agent 'responsible' portfolio of customers, , can sell product customers. analysis made on 'current responsability on portfolio' if agent leaves company, customers reassigned new agent , customer uniquely belongs new agent.

i model case this:

enter image description here

case c: doubts

a customer may have been assigned single agent or set of several agents each 1 being responsible productcategory.

for example:

  • alice manages tablesandwoods ltd , greenforest ltd.
  • bob manages chairs ltd , fastwheels ltd.
  • carol manages forniture ltd producttype = 'machinery' , manages frozenbottles ltd type of product.
  • dave manages forniture ltd producttype = 'consumables' , manages highceilings ltd type of product.

question:

in example "case c":

are customer , agent independent dimensions because forniture ltd has relation both caroland dave, 3d cube?

or 2d cube, agent not independent dimension, aggregator of customer "conditioned" somehow productcategory product aggregator?

i see how model this. in advance.

here how model it:

your fact table sales.

your dimensions (probably) date, product, customer , agent. closest case a.

collapse snowflake (white entities) dimensions. presence of these entities suggest should consider whether type-2 changing dimensions needed at-time analysis.

consider bridge table capture many-to-many relationship between agent , product.


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