PDF C_ABAPD_2309 Study Guide

According to the SAP clean core extensibility and ABAP cloud topic, SAP recommends using developer extensibility to enhance the existing UI for an SAP Fiori app. Developer extensibility allows you to use the UI adaptation editor in SAP Web IDE to modify the UI layout, add or remove fields, and bind them to the data model. You can also use the SAPUI5 framework to create custom controls, views, and controllers. Developer extensibility is based on the in-app extensibility concept, which means that the extensions are part of the same application and are deployed together with the app. Developer extensibility requires developer skills and access to the source code of the app. References: SAP Learning Hub, SAP S/4HANA Cloud Extensibility - In-App Extensibility, SAP Fiori: Extensibility

A projection view is a RESTful Application Programming object that contains only the fields required for a particular app. A projection view is a CDS view entity that defines a projection on an existing CDS view entity or CDS DDIC-based view. A projection view exposes a subset of the elements of the projected entity, which are relevant for a specific business service. A projection view can also define aliases, virtual elements, and annotations for the projected elements. A projection view is the top-most layer of a CDS data model and prepares data for a particular use case. A projection view can have different provider contracts depending on the type of service it supports, such as transactional query, analytical query, or transactional interface.

A database view is a CDS DDIC-based view that defines a join or union of database tables. A database view has an SQL view attached and can be accessed by Open SQL or native SQL. A database view can be used as a projected entity for a projection view, but it does not contain only the fields required for a particular app.

A metadata extension is a RESTful Application Programming object that defines additional annotations for a CDS view entity or a projection view. A metadata extension can be used to enhance the metadata of a CDS data model without changing the original definition. A metadata extension does not contain any fields, but only annotations.

A data model view is a CDS view entity that defines a data model based on database tables or other CDS view entities. A data model view can have associations, aggregations, filters, parameters, and annotations. A data model view can be used as a projected entity for a projection view, but it does not contain only the fields required for a particular app.

References: CDS Projection Views - ABAP Keyword Documentation, CDS Projection Views in ABAP CDS: What’s Your Flavor, Business Object Projection - ABAP Keyword Documentation

Field 1 (field1)

The syntax REFERENCE TO abap.cint(3) is incorrect for defining a database table field. Database table fields must be based on valid HANA-compatible data types or ABAP dictionary data types.

REFERENCE TO is used for object references in ABAP classes and is not valid in this context.

Therefore, field1 is defined incorrectly, making option C correct.

Field 2 (field2)

The data type abap.char(133) is valid for defining a character-based field in a table.

This field is correctly defined.

Field 3 (field3)

The data type abap.quan(2) is valid for defining a quantity field. The @Semantics.quantity.unitOfMeasure annotation correctly links this field to field4, which is a unit of measure field.

This field is correctly defined.

Field 4 (field4)

The data type abap.unit(2) is valid for defining a unit of measure field.

This field is correctly defined.

References:

SAP ABAP Documentation: ABAP Data Types for SAP HANA Tables

SAP Training for Back-End Developer - ABAP Cloud