Schema in Star and MV

Hi guys,.

I drew a star for one of my data mart schema, and my client is after me suggesting that while I should create a MV to provide an overview. I'm trying to convience my client does not do this with the points as below:

1. as we have created a star schema in the database we should enjoy the same thing and should avoid creating another layer of reporting which will increase in the future complex queries while expanding the functionality of the mart.

2. we need to create a full refreshment MV and during data refresh is not available for users and the time will increase during the period of time once the data increases

3. as MV are a table on a disk using a MV in this case will consume the tablespace that will increase over the time period.

Please you experts you will suggest more points or additions. We use SAP BO as a reporting tool in our Organization in which a universe can be created easily for reporting.

See you soon,.
Shaz

>
I drew a star for one of my data mart schema, and my client is after me suggesting that while I should create a MV to provide an overview. I'm trying to convience my client doesn't not to do this
>
Sounds like a question of 'trade' rather than a technical problem.

In my view, a client has no "skin in the game" with regard to the way in which the feature is implemented. Their skin is to get the results they need. The physical implementation of the system and the data must be OPAQUE to the client.

It is the purpose of the Service Level Agreements - to define the requirements that must be met and deadlines to comply with these requirements.

So, I would start by working with your client to define and agree on the SLA that needs to be met and as it respect the current schema of the Star. If it can meet this customer has no descendants.

If the service LEVEL cannot be met, then you must decide what are the options to modify the system to meet the SLA.
Normally, I'm waiting for my manager to negotiate the SLAs with customers.

Tags: Database

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