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Indexing and OLAP Cubes

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Anbarasan

Technical User
Apr 19, 2002
3
FI
Hello,
Does indexing the database table has some effect on the processing time of the cube?
This is an urgent issue. Plese answer me ASAP.
Thanks in advance,
Anbarasan
 
Yes and No. I have found that the answer really depends. Indexing may help if you are 1) filtering a subset of the fact table, or 2) using a non optimized schema where you are joining to all of the fact tables. One case where indexing won't help is if you are loading the entire fact table and the cube is properly optimized using keys. If this is the case then indexing won't help much because the cube is not joining to the dimension tables when it is loading the data.

When I was at ProClarity they swore that indexing didn't help a bit. Microsoft says that you should index. I say it depends.

dshroyer@obs3.com
OLAP Business Solutions
 
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