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A few thoughts on work life-balance. Is vc still a thing final. The GaryVee Content Model. Mammalian Brain Chemistry Explains Everything. Related Books Free with a 30 day trial from Scribd. Related Audiobooks Free with a 30 day trial from Scribd. Views Total views. Actions Shares. No notes for slide. How logic is defined Dimension Logic use sparingly!
Logic Advice In general you want to create data for logic to avoid performance issues in production Apply best practices to help determine which type of logic to use do not assume just because it is possible in development that is will be successful in production. Microsoft says they are working on it. For example if the account dimension has two hierarchies AS will create two dimensions named account.
The top member of these dimensions will be named [all account. An understanding of this concept is important because it relates to how MDX formulas need to be written. CurrentMember is Account. H2] And Account. H3], Account.
H1] And Account. Otherwise AS returns a syntax error. BPC 5 Dimension Formula Guideline Note: When defining a formula on H1, you have to specify that formula returns a valid result only if the current members on other hierarchies are at the top level of each hierarchy.
Previous example is for the case that base member has dimension formula. If you need to define dimension formula for parent member, you have to use a different type of formula because you need to roll up the value of children. What is the relationship with the Measures Dimension?
What is the relationship to the Time Dimension? Dimension Formula Example Does the calculation have to be run at aggregated levels? In fact, it MUST be run at aggregated levels in order to generate the correct result. This calculation should be run after the Measures calculation. Dimension Formula Example What is the relationship with the Time Dimension In this situation an average may be required when looking at Headcount at a parent in the Time Dimension. All Rights Reserved No part of this publication may be reproduced or transmitted in any form or for any purpose without the express permission of SAP AG.
The information contained herein may be changed without prior notice. Some software products marketed by SAP AG and its distributors contain proprietary software components of other software vendors. Oracle is a registered trademark of Oracle Corporation. Java is a registered trademark of Sun Microsystems, Inc. H1], H2. M , Analysis Service returns aggregated value of the yellow slice as shown below:.
There are two valid cells on the yellow slice, H1. M, H2. M and H1. F, H2. M is the normal cell that returns the right value, the formula needs to ensure that H1.
M returns the right value. The downside is that formula becomes complicated and some Analysis Service functions cant use tuple as parameter. Note: To avoid the character limit that exists for dimension formulas it is recommended that you add functions to the logic libraries.
CurrentMember is [ProdAcct]. To define the calculation: ProdAcct. Cost2 The syntax would be: Hir1 ProdAcct. BPC 5. X SP1 assigns solve order 0 to each formula if no solve order is explicitly specified in order to make sure the dimension formula is evaluated first within a tuple. Currently the use of dimension formulas in SQL it not recommended due to significant performance degradation. Some test results have shown response times going from 2 to 90 seconds when dimensional formulas are used.
The presence of a formula property in a dimension will also cause performance degradation, even if the property column is left blank. This is a Microsoft issue with SQL Microsoft has told us they will be releasing an SP for AS that should improve performance.
This has not been tested and verified so at the present time it is not recommended to use dimensional formulas or create a formula property on a dimension when using SQL SQL correctly handles the evaluation of the hierarchies, therefore, you are not required to write conditional formulas IIF nor does the software have to control the solve order It will be set as 0 by default.
However, you must define a formula for each hierarchy. When a member in H1 has a formula that refers to a member in H2, the formula should use H1 member name instead of H2. Here is an example. User wants to write a formula as below. For SP1 formulas need to be defined for each hierarchy. If you are going to use Dimensional formulas you will need to add an inapp property to the dimension called formula. If a dimension has only one Hierarchy parentH1 the dimensional formulas can be created in the formula column there is no need for a formulah1 column.
If a dimension has multiple hierarchies you will still need to create an inapp property called formula, also ensure that there are inapp properties called formulahn for each hierarchy in the dimension. We recommend that all field resources help your customer understand the importance of properly defining MDX and the reasons to avoid MDX. All MDX formulas must be qualified: Dimension.
Hierarchy Number. Member Account. All members referred to in a formula must exist in the referenced hierarchy real defined parents in SQL or system assigned in SQL 3.
Member references are defined as tuple for all the hierarchies in that dimension 5. Formula length can be a challenge when managing multiple hierarchies in a single dimension. The use of the formula library is recommended to avoid the character length issue in Excel.
Limit the number of hierarchies that have formulas to get better performance in both SQL and Ideally all formulas should be in one hierarchy H1 and there is no formula is H2, H3, and etc.
Recommendation to not use Formula property or dimensional formulas with Note: A key consideration is it is extremely difficult for the application to validate the formulas and if you use the generic Query Analyzer you may not detect a problem.
Only when the formula is assigned in the dimension will you fully see the ramifications of not following the guidelines in this document. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Uploaded by Anirban DevBurman. Did you find this document useful? Is this content inappropriate? Report this Document.
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