Chasm Trap And Fan Trap In Bo Pdf
File Name: chasm trap and fan trap in bo .zip
Please can any one explain me the exact usage and meaning of Fan Trap and Chasm Trap? Please provide me links which helps me in offline
- Recognizing and resolving Chasm and Fan traps when designing universes
- Resolving Fan Traps - SAP BO
- Chasm trap and fan trap in bo pdf files
- It’s all in the universe – handling chasm and fan traps: 5 Comments
SAP BI 4. In this release, the semantic layer universe layer for the uninitiated has been re-worked completely to expose all business data under a single umbrella.
Recognizing and resolving Chasm and Fan traps when designing universes
Explain personal, shared and secured? Answer: Personal: The user and the universes, which are created using the personal connection belongs to that computer and can be accessed from that computer only, create it. Shared: In the shared type of connection we can use common resources such as universes and documents. This can be used by several users. The parameters are stored locally in locdata folder with name sdac. This shared type of connection is used to set up in a testing environment before publishing them.
Since bo is creating multiple queries for header and distribution data, the condition. When there are measure objects defined for both fact tables, use the universe parameter option sql multiple sql statements for each measure. Daves adventures in business intelligence fan chasm trap. Aug 31, in bi system fan trap and chasm trap are common problem when designing a universe semantic layer which is used by bi reports to dynamically generate query. Work with the business to design and develop solutions to improve business processes. Sap business objects interview questions pdf, browse latest sap bo interview.
Recently I worked on an assignment where the Business Objects universe was designed by a business analyst. Nothing wrong with that, as long as we get the correct results in reports or queries on the universe. But it was not to be. We encountered incorrect results primarily due to two reasons: 1. Mixing of grains in fact tables by not using proper contexts or the aggregate navigator 2. Unresolved chasm traps It was obvious that the business analyst was not trained in data modeling, nor did the universe go through a proper QA cycle where it is reviewed for data modeling errors. The most common problem caused by a chasm trap is fetching more data than expected.
Resolving Fan Traps - SAP BO
A fan trap is a less common problem than chasm traps in a relational database schema. It has the same effect of returning more data than expected. A fan trap is a type of join path between three tables when a "one-to-many" join links a table which is in turn linked by another "one-to-many" join. The fanning out effect of "one- to-many" joins can cause incorrect results to be returned when a query includes objects based on both tables. When you run a query that asks for the total number of car models sold by each model line, for a particular customer, an incorrect result is returned as you are performing an aggregate function on the table at the "one" end of the join, while still joining to the "many" end. This result is correct. However, the end user adds the dimension Model ID to the query as follows:.
Chasm trap and fan trap in bo pdf files
Jul 27 I did a fun presentation at least I had fun at the New York user group a few years back. I found the original download package and have posted it on the presentations page on this site. The download package includes the presentation in Adobe PDF format, several universes, some Microsoft Access database files, some sample reports… basically everything you need to go through the slides and review the examples.
SAP BI 4. In this release, the semantic layer universe layer for the uninitiated has been re-worked completely to expose all business data under a single umbrella. The self-service BI portal aka Infoview has been revamped with a new AJAX based design and providing quicker and easier access to content. Publishing and distribution of BI content to mass audience has been made easier. The universes created by this tool are identified by the.
Unlike loops, which return fewer rows, the Chasm and the Fan traps are two common circumstances which return too many rows. You can use Designer to resolve both types of problems in your universe schema. What is a Chasm trap? The Chasm trap occurs when two many to one joins converge on a single table.
The Chasm trap occurs when two many to one joins converge on a single table.
It’s all in the universe – handling chasm and fan traps: 5 Comments
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the Fan traps are two common circumstances which return too many rows. The Chasm trap occurs when two “many to one” joins converge on a single table.