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Core Data Services, Preparing views for Associations/Joins

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Core Data Services, Preparing views for Associations/Joins

By Jerome Monteu Nana

Core Data Services, Preparing views for Associations/Joins

You will learn

You will prepare a basic view for Association; in other words, for joining with other views.

Details


Step 1: Prepare the ABAP perspective

Make sure that your Eclipse Framework from the S/4HANA instance is opened in the ABAP perspective and that the basic view (ZXSHI_AIRLINE) from the previous S/4HANA tutorials is available:

The prerequisite

You are now in the ABAP Eclipse perspective. Make sure you are in the Project Explorer tab. Here you will create in the TMP-SHA Package a new ABAP object for type DDL source.

Select the package TMP-SHA and expand it. Then expand the Code Data Services folder as well. From there select the subfolder Data Definitions (1 in the screenshot below). Right-click on the subfolder Data Definitions (2 in the screenshot), select DDL Source and press Finish.

Create DDL
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Step 2: Create a DDL source

In the new window DDL Source (Create a DDL Source), the Project is called S4H_100_sha_en and the Package is called $TMP. Enter Airline text, private view, VDM interface view as the Description and ZXSH_I_AIRLINETEXT as the Name and click Finish.

Create the DDL view

Edited fields:

Create the DDL view

Code for the newly created view named ZXSH_I_AIRLINETEXT is generated:

Generate the code
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Step 3: Edit the generated code

In the generated code, replace these values:

Line Property Current value New value
1 @AbapCatalog.sqlViewName: sql view name ZXSH_IAIRLINET
3 delete entire line 3
4 @AccessControl.authorizationCheck: #CHECK #NOT_REQUIRED
5 @EndUserText.label: Airline text, private view, VDM Interface view Airline Name
6 select from data source name scarr
Code enhancement

Edited code:

Code enhancement
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Step 4: Add annotations

Now consider the generated code again. You will enhance the code by inserting new annotations after line 4:


@ObjectModel.dataCategory: #TEXT

This is shown in number 1 in the screenshot (2 shows the drop-down choices)

Set the data category text

Drop-down choices:

Set the data category text
@Analytics.dataExtraction.enabled: true
Annotation

Annotation:

Set the annotation equal 2
@VDM.viewType: #BASIC
Set the annotation view type

View type:

Set the view type equal Type Basic

In the generated code, you will modify the view name after the define viewstatement as follows:

Change Zxsh_I_Airlinetext with ZXSH_I_AirlineText

Modify the view name

Next, enhance the generated code with the assignment of the following key columns:

key carrid as Airline,
key spras as Language,
Assign the key column
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Step 5: Add annotations to the select statement

Now, enhance your generated code again by inserting following new annotations:

In the line after the expression key carrid... insert:

@Semantics.language: true
Enhancement with the annotation for language

In the line after the expression key spras ... insert:

@Semantics.text: true
@Semantics.text: true
Enhancement with the annotation for text and end userEnhancement with the annotation for text and end user
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Step 6: Prefix the column names with the table name

Next, prefix the column names with the ERP table name scarr:

  • Line 9 should read: key scarr.carrid as Airline,
  • Line 14 should read: scarr.carrname as AirlineName,
Insert table name Insert table name
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Step 7: Add Annotation for Object representative key

Insert after line 7 an additional annotation for object representative key:

@ObjectModel.representativeKey: 'Airline'

Annotation for object representative key

Inserting an annotation for the language was done to demonstrate the possibilities available with annotations. Since here there is only one language it does not make sense to use this annotation. Therefore, comment out lines 11 (@Semantics.language: true) and 12 (key spras as language). Save, and activate the generated enhanced code. The final version should be identical to this:

Coding
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Step 8: Display the content of the text view

You can now preview the content of the created text view, ZXSH_I_AIRLINETEXT. In the left panel, select and right-click on the view ZXSH_I_AIRLINETEXT, select Open Data Preview and then press Enter.

Preview the data

You can copy this content from here and paste it to the code editor of your ABAP perspective as well instead of enhancing the generated code on your own by typing:

@AbapCatalog.sqlViewName: 'ZXSH_IAIRLINET'
@ClientDependent: true
@AccessControl.authorizationCheck: #NOT_REQUIRED
@EndUserText.label: 'Airline Name'
@ObjectModel.dataCategory: #TEXT
@Analytics.dataExtraction.enabled: true
@VDM.viewType: #BASIC
@ObjectModel.representativeKey: 'Airline'
define view ZXSH_I_AirlineText as select from scarr {
 key scarr.carrid as Airline,
//  @Semantics.language: true
//  key spras as Language,  
 @Semantics.text: true
 @EndUserText.label: 'Airline Name'
 scarr.carrname as AirlineName
}
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Notes

Although SAP offers trial editions for free you will still have to cover the costs for running these trial editions on AWS.

This tutorial is part of the S/4HANA Core Data Services. More information is available here:

Updated 03/22/2017

Time to Complete

15-25 Min

Beginner

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