What is cardinality in Bo universe?

Cardinality is a property of a join that describes how many rows in one table match rows in another table. Cardinality is expressed as the minimum and maximum number of rows in a column at one end of a join, that have matching rows in the column at the other end of the join.

What is Universe Designer in BusinessObjects?

SAP Universe Design tool allows users to create, edit or delete existing models published in BO repository. With Universe Designer, you can build the semantic layer for non-SAP and SAP data sources to build data models for DB objects.

What is cardinality in SQL with example?

In SQL (Structured Query Language), the term cardinality refers to the uniqueness of data values contained in a particular column (attribute) of a database table. The lower the cardinality, the more duplicated elements in a column.

What is join cardinality in Hana?

A specified join cardinality allows the optimizer to decide based on the fields requested in the query whether a join needs to be executed. In models in which many joins are defined, join pruning can lead to significant performance boosts and reductions in temporary memory consumption.

How does SAP HANA define cardinality?

SAP HANA features like Calculation Views and CDS allow to specify the cardinality for joins to improve the performance of the execution. The cardinality specifies the number of rows which are matching another table if these tables are joined. With SPS04, this feature is also possible in plain SQL.

How can the universe modify BusinessObjects?

Open your report in WebI (if BI Launch pad, modify mode.)
Click on “Data Access” tab.
Click on “Tools” tab under “Data Access”
Select your query to change your universe.
After you select your query, you will be prompted to select the new universe.
Select the universe you want.

How do you create a universe in information design tool?

To create a Universe in IDT, go to Start → All Programs → SAP Business Intelligence → SAP Business Objects BI Platform 4 Client Tool. In Information Design Tool, you have to create a New Project. Go to File → New → Project. Enter the Project Name and Click on Finish.

What are 3 types of cardinality ratios?

One to one cardinality. When a single instance of an entity is associated with a single instance of another entity, then it is called as one to one cardinality.
One-to-Many cardinality.
Many-to-one cardinality.
Many-to-many cardinality.

What are the types of cardinalities?

In other words, cardinality describes a fundamental relationship between two entities or objects. There are three relationship types or cardinalities: one-to-one, one-to-many, and many-to-many.

What is join pruning?

Join pruning is a process where SAP HANA eliminates both tables and joins from its execution plan based how the joins are defined in the information view and how data is queried from the information view.

What is cardinality in Bo universe?