CDS View Entity Annotation
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Questions and Answers

What is the correct way to define a parameter in a CDS view?

  • Using a component of an ABAP Dictionary structure
  • Using a numeric value
  • Using a data element (correct)
  • Using a built-in ABAP type (correct)

    • What is the purpose of a unique secondary key?

  • To improve data integrity
  • To provide an alternative access path (correct)
  • To optimize data retrieval (correct)
  • To enforce data consistency

    • What is the best way to achieve faster access to internal tables?

  • Using a hashed internal table with a partial primary key from the left
  • Using a standard internal table with a complete primary key (correct)
  • Using a hashed internal table with a complete primary key (correct)
  • Using a sorted internal table with a partial primary key from the left (correct)

    • What is the correct sequence of execution in an ABAP program?

    <p>Numeric functions, addition and subtraction, multiplication and division</p> Signup and view all the answers

    How do you redefine a component of a superclass in a subclass?

    <p>By adding the clause REDEFINITION to the component in the subclass</p> Signup and view all the answers

    What is the purpose of a projection view in ABAP?

    <p>To transform data</p> Signup and view all the answers

    What is the benefit of using a hashed internal table?

    <p>Faster data retrieval</p> Signup and view all the answers

    What is the purpose of a unique key in ABAP?

    <p>To improve data integrity</p> Signup and view all the answers

    What is the effect of attaching a system field to an input parameter of a CDS view entity?

    <p>The value of sy-langu will be passed to the CDS view automatically both when you use the CDS view in ABAP and in another CDS view entity (view on view).</p> Signup and view all the answers

    What is the data type of gv_result in the assignment data(gv_result) = 1 / 8?

    <p>TYPE I</p> Signup and view all the answers

    Which of the following statements is true about the given code?

    <p>In class CL1, the interface method is named if-m1.</p> Signup and view all the answers

    What will happen when executing the cast go_sub1 = CAST #(go_super)?

    <p>It will work.</p> Signup and view all the answers

    What is the purpose of setting a field to read-only in a service definition?

    <p>To make the field read-only in all applications of the RESTful API.</p> Signup and view all the answers

    What is the effect of using the annotation @Default.aggregation.Column on a CDS view?

    <p>It sets the default aggregation type of the column to SUM.</p> Signup and view all the answers

    What is the purpose of using the ABAP statement DATA gv_result TYPE i?

    <p>To declare a variable of type integer.</p> Signup and view all the answers

    What is the effect of using the CDS view annotation @ObjectModel.createEnabled: true?

    <p>It enables the creation of new objects in the CDS view.</p> Signup and view all the answers

    What is the data type of gv_target in the statement DATA gv_target TYPE string?

    <p>String</p> Signup and view all the answers

    What is the correct syntax for a SELECT statement in ABAP SQL?

    <p>SELECT mat FROM demo_sales_cds_so_i_ve...</p> Signup and view all the answers

    What is the purpose of a CDS view?

    <p>To define a data model</p> Signup and view all the answers

    What is the data type of connection_full based on the statement DATA connection_full TYPE /DMD/I_Connection?

    <p>Structure</p> Signup and view all the answers

    What is the correct syntax for a CASE statement in ABAP SQL?

    <p>CASE WHEN F2 = '1' THEN 'Value 1' WHEN F2 = '2' THEN 'Value 2' ELSE 'Value for the rest' END</p> Signup and view all the answers

    What is the data type of gv_source in the statement DATA gv_source TYPE c?

    <p>Character</p> Signup and view all the answers

    What is the purpose of a unique key in a CDS view?

    <p>To improve data integrity</p> Signup and view all the answers

    What is the effect of using the CDS view annotation @ObjectModel.createEnabled: true?

    <p>It allows creation of new records</p> Signup and view all the answers

    Study Notes

    CDS View Entity

    • Attaching a system field to an input parameter of a CDS view entity means that the value of sy-langu will be passed to the CDS view automatically when used in ABAP or in another CDS view entity.
    • It is still possible to override the default value with a value of your own.

    Data Type

    • In the assignment data(gv_result) = 1 / 8, the data type of gv_result is TYPE I.

    Interface Methods

    • In class CL2, the interface method is not named if1-m1.
    • Class CL2 uses the interface.
    • In class CL1, the interface method is named if-m1.
    • Class CL1 uses the interface.
    • Class CL1 implements the interface.

    Casting

    • go_sub1-&gt;sub1_meth1(...). will work.
    • go_sub2-&gt;sub2_meth1(...). will work.
    • go_sub1 = CAST #(go_super) will work.
    • go_sub2 = CAST #(go_super) will not work.

    Read-only Field

    • Setting a field to read-only in the metadata extension makes the field read-only in all applications of the RESTful Application Programming model.
    • Setting a field to read-only in the service definition does not make the field read-only in all applications of the RESTful Application Programming model.

    Core Data Service View Entity

    • When attempting to activate the definition, the response will be an activation error because the key fields of the union do not match.

    ABAP SQL

    • The select statement that selects the mat field on line #17 is SELECT mat FROM demo_sales_cds_so_i_ve....
    • INDEX TABLE is a generic internal table type.

    CDS View Variable

    • The variable type of connection_full based on the code DATA connection_full TYPE /DMD/I_Connection is a structure.

    ABAP SQL Case Distinctions

    • Valid case distinctions in ABAP SQL are CASE with WHEN and ELSE clauses, and CASE with WHEN and OTHERS clauses.

    Unique Secondary Key

    • A unique secondary key is created with the first read access of a table.
    • A unique secondary key is updated when the table is modified.

    Faster Access to Internal Tables

    • Specifying the primary key partially from the left without gaps in a sorted internal table results in faster access.
    • Specifying the primary key completely in a hashed internal table results in faster access.
    • Specifying the primary key completely in a sorted internal table results in faster access.

    CDS View Entity Input Parameter

    • A built-in ABAP Dictionary type can be used to replace "????" in the definition of a CDS view entity with an input parameter.
    • A data element can be used to replace "????" in the definition of a CDS view entity with an input parameter.

    Sequence of Execution

    • The sequence of execution in the dropdown list is:
      • Numeric functions (highest priority)
      • Multiplication (") and Division (/) (middle priority)
      • Addition (+) and Subtraction (-) (lowest priority)

    Redefining a Component

    • To redefine a component of a superclass in a subclass, you add the clause REDEFINITION to the component in the subclass.
    • You implement the redefined component in the subclass.

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    Related Documents

    C_ABAPD_2309 80_Final consider.pdf

    Description

    Understanding the effects of attaching a system field to an input parameter of a CDS view entity in ABAP.

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