SAP #BOBJ #BI 4.1 Upgrade Webcast Series 9: Web Intelligence Calculation Engine Changes

©2014 SAP SE or an SAP affiliate company. All rights reserved.
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Customer
SAP BusinessObjects BI 4.1 Upgrade Webinar Series
BI 4.1 WebI Calculation Engine Changes
Presenters: Pascal Gaulin,
David Francois Gonzalez
SAP BI Development
Brought to you by the Customer Experience Group

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Customer
We bring to you all that you need to successfully upgrade to the SAP BusinessObjects BI Platform 4.1.
You can find a BI 4.1 Upgrade Overview page on SCN at: http://scn.sap.com/docs/DOC-56525
Webinars also complement these published resources: http://scn.sap.com/docs/DOC-56308
SAP BusinessObjects BI Platform 4.1 Upgrade Enablement

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Customer
Safe Harbor Statement
This document is intended to outline future product direction, and is not a commitment by SAP to deliver any given code or functionality. Any statements contained in this document that are not historical facts are forward-looking statements. SAP undertakes no obligation to publicly update or revise any forward-looking statements. All forward- looking statements are subject to various risks and uncertainties that could cause actual results to differ materially from expectations. The timing or release of any product described in this document remains at the sole discretion of SAP. This document is for informational purposes and may not be incorporated into a contract. Readers are cautioned not to place undue reliance on these forward-looking statements, and they should not be relied upon in making purchasing decisions.

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Web Intelligence 4.1 Calculation Changes
The succession of corrective maintenance releases for Web Intelligence (XI R2, XI 3.x), included in 4.1, can sometimes lead to calculation result differences between versions.
Important note…:
The calculation changes have so far impacted very few of our customers and for these customers, a maximum of 1% of their document reports were impacted. This was in 4.0.
In 4.1, many of the calculations changes have been fixed. Further, an on-the-fly formula rewrite mechanism has been implemented (in 4.1 SP3), on migrated documents, which lead to even less impacts.
If in doubt, SAP Consulting can help you identify which of your documents are at risk.

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Customer
Web Intelligence 4.1 Calculation Changes 3 Types of Calculation Changes
The calculation changes can be classified into 3 types:
1.Error correction: Web Intelligence returns now a correct result instead of an error (#UNAVAILABLE, #COMPUTATION, etc.)
2.Wrong (or unexpected) result correction: Web Intelligence returns now a correct result instead of one that was wrong before
3.Behavior adjustment for consistent logic: Web Intelligence returns now a result that is consistent with the overall design and logic, instead of a non- consistent result
Changes #1 will have no impact on documents which do not have the error
Changes #2 and #3 may impact documents and we have documented the major changes (see http://scn.sap.com/docs/DOC-39973)

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Example of change type #1: Calculation error correction
Before: the calculator would return #UNAVAILABLE when a delegated measure is used against a dimension based on a computed URL
After: the calculator returns the expected result

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Example of change type #2: Wrong result correction
Before: Week number of Dec 31th, 2012 = 53
After: Week number of Dec 31th, 2012 = 1

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Example of change type #3: Behavior adjustment for consistent logic
Aggregation functions on an object participating to a merged object.
Before: The aggregation function (e.g.: Count, Min, Max...) applied to an object participating to a merge, was calculated on the value set of the merged object, instead of the value set of the object itself.
After: It is now processed on the value set of the object. To get the previous behavior, replace the original object by the merged object.

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Automatic Formula Rewrite Mechanism
Since version 4.1 SP03, Web Intelligence provides a mechanism that automatically rewrites a selection of formulas, when these formulas match a defined pattern.
Formulas are rewritten when you open a document from a previous Web Intelligence version.
After the rewrite operation, the formulas return the same results as before the calculation changes.
Saving the document will then keep the new formulas  no need to execute this mechanism again!
Web Intelligence 4.1 Calculation Changes The Automatic Formula Rewrite Mechanism

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The Automatic Formula Rewrite mechanism is available by default on documents migrated to Web Intelligence 4.1 SP03 and newer, for the following formula patterns:
1.Where() operator with a dimension as parameter in the condition
2.Running calculation on section
3.Merged object in aggregation functions
4.Running calculations with reset in cross-tables (since 4.1 SP3 patch 3)
This list could be extended in future releases with more formula patterns, as they would be discovered.

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Rewriting Rule #1 on the Where() Operator
Pattern: Where() operator with a formula based on a dimension, on a measure with a condition
Example: =Max([Revenue] In([Year]) Where(DataProviderType(DataProvider([Quarter])) = "Universe"))
Before: Dimensions (i.e. [Quarter]) were incorrectly added to the measure context
Now: Dimensions are only used for the conditional evaluation
Since 4.1 SP3, the above formula is automatically rewritten as: =Max([Revenue] In([Year],[Quarter]) Where (DataProviderType(DataProvider([Quarter])) = "Universe“);[Quarter]))
Web Intelligence 4.1 calculation changes The Automatic Formula Rewrite Mechanism
Web Intelligence versions where this rule applies
XI 3.1
Before SP3 FP6, SP4 FP1 and SP5 FP1
BI 4.0
Before SP5

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Customer
Rewriting rule #2 on “Running calculations on sections”
Pattern: Any running calculation within sections
Exemple: =RunningSum([Sales Revenue])
Before: the running calculation was reset for each new section value
Now: the running calculations will not automatically reset for each new section value  the value of the first cell of a block in a section instance is based on the last cell value of the block from the previous section instance
Since 4.1 SP3, the above formula is automatically rewritten as: =RunningSum([Sales Revenue];([State]))
XI R2
Before SP5 FP10

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Customer
Rewriting rule #3 on “Merged object in aggregation functions”
Pattern: Aggregation functions on objects participating to a merge
Example: =Count([Lines]), with [Lines] participating to a merged object
Before: The aggregation function applied to an object participating to a merged object, was processed on the value set of the merged object instead of the value set of the object itself
Now: The aggregation function is applied to the value set of the object
Since 4.1 SP3, the above formula is automatically rewritten as: =UseMerged(Count([Lines]))
XI 3.1
Before SP3 FP2

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Customer
Rewriting rule #4 on “Running calculations with reset in cross-tables”
Pattern: Running calculations with a dimension as a reset context, in cross-tables
Example: =RunningSum([Sales revenue];([State]))
Before: When adding a dimension as reset context (2nd parameter), the running calculation was improperly evaluated in a column based direction (‘N’ pattern)

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Now: In this case, the running calculation is evaluated in a row based direction (‘Z’ pattern)
Since 4.1 SP3 patch 3: the above formula is automatically rewritten as: =RunningSum([Sales revenue];ForceCol;([State]))
BI 4.0
SP2 patch 20 and 21, SP5 all versions, SP6 before patch 5, SP7 RTM
BI 4.1
SP1 before patch 2

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Customer
1.Known calculation changes are collected by SAP R&D and reviewed by SAP Support before being published on the SAP Community Network:
http://scn.sap.com/docs/DOC-39973
Caution: this document does not intend to be a complete list of all the calculation changes and only focuses on the major known changes.
2.If you think that one of your Web Intelligence documents might be impacted by a calculation change, check in the SAP Notes if it is a known issue and if not, get in touch with SAP Support.
3.Finally, in order to improve the stability of the Web Intelligence calculator, we are offering our customers to re-use some of their documents in our automatic test suite. Please, contact us if you are interested.
Web Intelligence 4.1 Calculation Changes Take Away

Thank You!
Contacts:
Pascal Gaulin, Web Intelligence Product Expert, SAP France
David-François Gonzalez, Web Intelligence Customer Adoption Expert, SAP France

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Customer
SAP BusinessObjects BI 4.1 Upgrade Webinar Series
BI 4.1 WebI Calculation Engine Changes
Q & A
Brought to you by the Customer Experience Group

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Customer
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SAP #BOBJ #BI 4.1 Upgrade Webcast Series 9: Web Intelligence Calculation Engine Changes

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SAP #BOBJ #BI 4.1 Upgrade Webcast Series 9: Web Intelligence Calculation Engine Changes