How the data is fetched from the cube for reporting

hi all,
I need to understand the below scenario:(as to how the data is fetched from the cube for reporting)
I have a query, on a multiprovider connected to cubes say A and B. A is on BIA index, B is not. There are no aggregates created on both the cubes.
CASE 1: I have taken RSRT stats with BIA on, in aggregation layer it says
Basic InfoProvider     *****Table type      ***** Viewed at          ***** Records, Selected     *****Records, Transported
Cube A     *****             blank                 *****           0.624305         *****          8,087,502        *****             2,011
Cube B     *****                     E   *****                      42.002653 *****                  1,669,126            *****                    6
Cube B     *****                     F *****                     98.696442    *****                  2,426,006       *****                    6
CASE 2:I have taken the RSRT stats, disabling the BIA index, in aggregation layer it says:
Basic InfoProvider     *****Table Type     *****Viewed at     *****Records, Selected     *****Records, Transported
Cube B     *****E     *****46.620825     ****1,669,126****     6
Cube B     *****F     ****106.148337****     2,426,030*****     6
Cube A     *****E     *****61.939073     *****3,794,113     *****3,499
Cube A     *****F     ****90.721171****     4,293,420     *****5,584
now my question is why is here a huge difference in the number of records transported for cube A when compared to case 1. The input criteria for both the cases are the same and the result output is matching. There is no change in the number of records selected for cube A in both cases.It is 8,087,502 in both cases.
Can someone pls clarify on this difference in records being selected.

Hi Jay,
Thanks for sharing your analysis.
The only reason I could think logically is BWA is having information in both E and F tables in one place and hence after selecting the records, it is able to aggregate and transport the reords to OLAP.
In the second case, since E and F tables are separate, aggregation might be happening at OLAP and hence you see more number of records.
Our Experts in BWA forum might be able to answer in a better way, if you post this question over there.
Thanks,
Krishnan

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How the data is fetched from the cube for reporting - with and without BIA

hi all,
I need to understand the below scenario:(as to how the data is fetched from the cube for reporting)
I have a query, on a multiprovider connected to cubes say A and B. A is on BIA index, B is not. There are no aggregates created on both the cubes.
CASE 1: I have taken RSRT stats with BIA on, in aggregation layer it says
Basic InfoProvider     *****Table type      ***** Viewed at      ***** Records, Selected     *****Records, Transported
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Cube B     ***** E ***** 42.002653 ***** 1,669,126      ***** 6
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CASE 2:I have taken the RSRT stats, disabling the BIA index, in aggregation layer it says:
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Cube B     *****E     *****46.620825     ****1,669,126****     6
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Cube A     *****E     *****61.939073     *****3,794,113     *****3,499
Cube A     *****F     ****90.721171****     4,293,420     *****5,584
now my question is why is here a huge difference in the number of records transported for cube A when compared to case 1. The input criteria for both the cases are the same and the result output is matching. There is no change in the number of records selected for cube A in both cases.It is 8,087,502 in both cases.
Can someone pls clarify on this difference in records being selected.

Hi,
yes, Vitaliy could be guess right. Please check if FEMS compression is enabled (note 1308274).
What you can do to get more details about the selection is to activate the execurtion plan SQL/BWA queries in data manager. You can also activate the trace functions for BWA in RSRT. So you need to know how both queries select its data.
Regards,
Jens

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Hi,
Thank you for sharing this with us, and it will help others who have met with this issue.
Victoria
Forum Support
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How the data is fetched from the cube for reporting

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