The ABAP statement DATA connectionfull TYPE /DMO/IConnection. declares a work area, which is a structure. In ABAP, when a CDS view entity (like /DMO/IConnection) is used directly with the DATA ... TYPE syntax, the system creates a structured data object. The components of this structure directly correspond to the fields defined in the projection list of the specified CDS view. This variable is suitable for holding a single row of data from the view.

A. Simple variable: A simple variable holds a single elementary value (e.g., integer, character). A CDS view represents a collection of multiple fields, not a single value.

C. Internal Table: To declare an internal table based on the CDS view, the syntax must include the TABLE OF addition, for example: DATA connectionfull TYPE TABLE OF /DMO/IConnection..

1. SAP Help Portal

ABAP Keyword Documentation

DATA - TYPE: "If dtype is a structured data type from ABAP Dictionary or a public visibility section of a global class

a structured data object dobj (a structure) is declared." A CDS view is treated as a structured data type from the ABAP Dictionary in this context. (See section: DATA dobj TYPE dtype ...)

2. SAP Help Portal

ABAP Keyword Documentation

TYPES - DATA: This document explains the relationship between data types and data objects. It clarifies that a DATA statement creates a data object with the attributes of a specified data type. Using a CDS view as the type results in a structured data object. (See section: TYPES - DATA)

3. SAP Help Portal

ABAP Keyword Documentation

SELECT - INTO: Examples in this section frequently show a SELECT SINGLE ... INTO @DATA(wa) or SELECT ... INTO @wa where wa is declared as DATA wa TYPE cdsentity.. This demonstrates the use of a variable typed on a CDS entity as a work area (structure) to receive a single row. (See various examples under the SELECT statement documentation).