What Is Information View In SAP HANA?

What are SAP HANA views?

SAP HANA view.

An SAP HANA view is used to select data, analyze data, or perform calculations with data from the SAP HANA database.

SAP HANA views are modeled in SAP HANA Studio for the SAP HANA database.

There are various different types of view: attribute views, analytic views and calculation views..

What is the difference between analytical view and calculation view?

SAP HANA Calculation view is a powerful information view. SAP HANA Analytic view measure can be selected from only one fact table. When there is need of More Fact table in information view then calculation view come in the picture. Calculation view supports complex calculation.

What is the difference between projection and aggregation in SAP HANA?

The projection is used to apply filter inside a calculation view on a join of views or union of mutiple joins. There is no other way of applying filters inside a calculation view than applying a projection. Whereas, aggregation is the default feature of calculation view.

What is schema in SAP HANA?

A schema is like a container which contains all the different elements or objects of a relational database. The elements of the system reside in the Catalog node of SAP HANA Information Modeler. Within the Catalog node, the relational SAP HANA database is divided into sub-databases known as schemas.

How do you add filters on calculator view?

ProcedureOpen the calculation view in the view editor.Select a projection or aggregation view node.In the Details pane, select a column.In the context menu, choose Apply Filter.In the Apply Filter dialog box, select an operator.In the Value field, select a fixed value or an input parameter from the value help.More items…

What is an analytical view?

Analytic Views are used to perform complex calculations and Aggregate functions such as Sum, Count, Min, Max, etc. Analytic Views are designed to run Star schema queries. Each Analytic View has one Fact table surrounded by multiple dimension tables. Fact table contains a primary key for each Dim table and measures.

What is calculated column in SAP HANA?

Calculated column in SAP HANATo start, open the calculation view we are working on and click on Projection_1 node. … The below dialog box opens up where you need to give the new field a technical name, a datatype and the logic inside the “Expression Editor”.More items…•

How do I use SAP HANA PlanViz?

PlanViz Analysis on CDS views First, goto ST05 and activate the trace. Now from Hana Studio, execute the CDS view on which you want to check the performance. After sucessfully executed the CDS view in Hana Studio, deactivate the Trace that was enabled before. Click on the Display Trace.More items…•

What is the use of calculation view in SAP HANA?

Calculation Views are used to consume Analytic, Attribute and other Calculation Views. They are used to perform complex calculations, which are not possible with other Views. There are two ways to create Calculation Views- SQL Editor or Graphical Editor. Built-in Union, Join, Projection & Aggregation nodes.

How does Hana views improve performance?

3 AnswersGet to know planViz and analyze the views using it.Check for performance from the initial nodes itself instead of struggling at the top.Always check for the number of records in the table and structure your view depending on it. … You can as well set cardinality to improve the performance.

How do I get Hana views?

Steps to Create a Calculation View in SAP HANAStep 1: Select Tables. … Step 2: Create a DIM information view. … Step 3: Converting dimension tables into DIM calculation tables. … Step 4: Adding dimension tables and columns. … Step 5: Create a calculation view. … Step 6: Add measure/ fact tables. … Step7: Join the fact tables.More items…

What is star join in Hana?

A set of joins are considered to be a star join when a fact table (large central table) is joined to two or more dimension tables (smaller tables containing descriptions of the column values in the fact table). A Star join is comprised of 3 main parts: Semijoins. Index ANDing of the results of the Semijoins.

What is a star join?

Star Joins A Star Join is where you join a really big fact table (or a really big subset of an enormous table) to a number of smaller tables. They are not to be confused with a Star Query. … A typical use for a Star Join would be the creation of an aggregated fact table from an atomic fact table.