What is the effect of INDEXING on Cube? and on DSO?

Hi,
I am trying to figure out the effect of indexing on a Cube and DSO.
1. My findings so far indicates that Indexing is a database concept but so is partition but partitioning applies in the case of a Cube. Right?
2.What is the effect of Indexing on a cube? How is it related to the "database concept that I keep reading?
How is it implement in BI?
3.What is the effect of Indexing on a DSO? How is it related to the "database concept that I keep reading?
How is it implement in BI?
Thanks

Hi,
thanks for the detailed information. I will appreciate some help on these follow ups on your posting:
On your answer to 1:
I read that there are 2 partitions, logical and physical. It is the physical partitioning which takes place at the database level, so can I assume that when you said u201CEven DSO can be partitionedu201D you meant the physical partition? And that logical partitioning is not possible in DSOs?
On your answer to 2:
So in the above you suggested that indexes apply not only to cubes but also to DSO with the statement that u201C..secondary indexes can be built on DSO u2026u201D
If so, how come there is not feature to drop and rebuild indexes for data load to DSOs?
I will appreciate a hint on the difference between u201Cindexesu201D and u201Csecondary indexesu201D. I am ok with what u201Cindexesu201D is, is the use of u201Csecondaryu201D that threw me off.//
On your answer to 3:
i.
Based on the link, there does not appear to be a simply way to drop and rebuild indexes in DSOs. It appears an ABAPer needs to be involved. Isnu2019t there a simply way as in cubes, to click on buttons for the index implementation for DSOs?
ii.
It suggests one must choose between B-tree and Bit map indexes, right? Is this the function of the BI consultant or as DBA? If the BI consultant should be able to do this, where is it implemented in BI?
Can you explain what you meant by u201Ccardinality of a column is lowu201D?
iii.
I know how in rsa1, a Cube can be partitioned on 0calmonth and 0fisper. If this is done at the database level, then can it be done also for DSO? If so, where in BI is it done for DSOs?
You also noted that SAP DB does not support table partitioning but Oracle does.
I know in my environment, the BASIS consultants are always talking about Oracle so I am assuming we have Oracle and not SAP DB.
I never heard of SAP DB, is it a substitute for Oracle in SAP BI environments?
Is it a DB that comes directly from SAP; if so, why do companies not keep the total SAP package but prefer to use Oracle?  Is it because the SAP DB does not support table partitioning?
Thanks

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