Warning before aggregation is osbsolete

Hi guru's
I'm migrating our BW system and in some queries we have the message Warning calculation before aggregation is obsolete.
We still use BW 3.x analyzer.
when i execute queries the message is only a warning and i can see result in my reports.
i need to check the data but do you know if the message is a warning because this functionnality does not existe in BI 7 analyzer tool and if i use Bex 3.x will the data be correct ?
Thanks
Cyril

Good day Cyril,
When you migrate a query which has CKF with 'Before Aggregation', you will be requested to change it to 'after aggregation'. After turning on the option for 'After Aggregation query behaves same as what it used to do in BEx 3.5 with option 'B4 Ag'gregation'. Results are same.
The use of BEFORE aggregation was removed as this can cause a drain on the system resources and therefore cause performance problems. For this reason it was made obsolete with the 7.x system. The OLAP processor handles data differently in the 7.x systems so removing the before aggregation option should not cause too many problems for customers migrating over.
With this in mind, however, there are differences to BEFORE and AFTER aggregation. It may not affect the calculations you are using in your queries but you must be aware that some calculations are carried out at different times and this can cause hiccups. Most note-worthy would be when formulae are used and when replacement path variables are needed. In some cases, the necessary calculations may not be carried out and the figures may not be available which would not have been an issue in the 3.x system using before aggregation.
Check out SAP Note 1151957 which is excellent for understanding how the OLAP processor carries out calculations. It also details the differences between BEFORE and AFTER aggregation and should be very helpful for you going forward - particularly if you use formulae or replacement path functions.
Be aware that there are differences and there may be queries where you get a red X instead of a value. In most cases, this means rewriting a formula so that the processor can now accomodate the aggregation you need to achieve.
Hope this helps, Cyril.
Regards,
Karen

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Hi
Try SAP notes 935903.
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Calculated Key Figures "Existance Indicator" with aggregation behaviour "Before Aggregation" will get now with NW 2004s warning popup "Time of calculation 'Before Aggregation' is obsolete" during execution.
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Also Check the below thread
/message/2986338#2986338 [original link is broken]
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Edited by: Shilpa Vinayak on Oct 10, 2008 4:23 AM

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Hi, buddies
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Message was edited by: Wim

Hi,
As per the my knowledge, we can use the properties of Before Aggregation in Bex Analyser.
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But it is considered as a bad practice in SAP.
If you want to use this option in query designer it not available,
because when we use calculated key figure in formulas it calculate as after aggregation. If you want to change it, we can change at analyser level.
Hope u understood.
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Calculation Before Aggregation obsolete in NW2004s

We are upgrading our sandbox from BW 3.5 to NW2004s and several of our queries use the obsolete Time of Calculation 'Before Aggregation' technique. I searched and found a thread Time of Calculation "Before Aggregation" obsolete in NW2004s in which Klaus Werner recommended the use of exception aggregation in place of the calculation before aggregation method.
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Message was edited by:
Eelco de Vries

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Time of calculation before aggregation is obsolete

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