02 Persistence layer-customization

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Create ABAP Package
Customized base table
Write test data to bottom table
View test data

[0] Provision

If you have not created a BTP Trail User Account, you need to apply for an account first and connect to BTP through Eclipse. For details, see " 00 - RAP Development Environment Configuration "

Booster - Abap Environment - Start

If it prompts Error that Entitlement is missing, click to enter Subaccount and click Entitlements on the left
Click the Configure Entitlements button and click Add Service Plans
Add ABAP environment
Then go back to the main console and try

Download Service Key for Eclipse to connect to BTP

[1] New Package

Project - New - ABAP Package

ZTRAVEL_APP_10001Create a Package named here

PS Package can be added to Favorite Packages for easy retrieval

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[2] Create Table

Package - New - Other ABAP Repository Object

ZTRAVEL_10001Create a Table named here

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The following is the definition of Table:

@EndUserText.label : 'Database table for travel data 10001'
@AbapCatalog.enhancement.category : #NOT_EXTENSIBLE
@AbapCatalog.tableCategory : #TRANSPARENT
@AbapCatalog.deliveryClass : #A
@AbapCatalog.dataMaintenance : #RESTRICTED
define table ztravel_10001 {

  key client      : abap.clnt not null;
  key mykey       : sysuuid_x16 not null;
  travel_id       : /dmo/travel_id;
  agency_id       : /dmo/agency_id;
  customer_id     : /dmo/customer_id;
  begin_date      : /dmo/begin_date;
  end_date        : /dmo/end_date;
  @Semantics.amount.currencyCode : 'ztravel_10001.currency_code'
  booking_fee     : /dmo/booking_fee;
  @Semantics.amount.currencyCode : 'ztravel_10001.currency_code'
  total_price     : /dmo/total_price;
  currency_code   : /dmo/currency_code;
  description     : /dmo/description;
  overall_status  : /dmo/overall_status;
  created_by      : syuname;
  created_at      : timestampl;
  last_changed_by : syuname;
  last_changed_at : timestampl;

}

Save and activate (the shortcut keys are the same as the GUI side "Ctrl + S, Ctrl + F3")

[3] Insert MockData

After creating the Table, the next step is to write several pieces of test data. Here, we write them by constructing a class.

Package - New - ABAP Class

Create zcl_generate_travel_data_10001a class named here with the following code:

CLASS zcl_generate_travel_data_10001 DEFINITION
  PUBLIC
  FINAL
  CREATE PUBLIC .

  PUBLIC SECTION.
    INTERFACES if_oo_adt_classrun.
  PROTECTED SECTION.
  PRIVATE SECTION.
ENDCLASS.

CLASS zcl_generate_travel_data_10001 IMPLEMENTATION.
  METHOD if_oo_adt_classrun~main.

    DATA itab TYPE TABLE OF ztravel_10001.

*   fill internal travel table (itab)
    itab = VALUE #(
      ( mykey = '02D5290E594C1EDA93815057FD946624' travel_id = '00000022' agency_id = '070001' customer_id = '000077' begin_date = '20190624' end_date = '20190628' booking_fee = '60.00' total_price =  '750.00' currency_code = 'USD'
        description = 'mv' overall_status = 'A' created_by = 'MUSTERMANN' created_at = '20190612133945.5960060' last_changed_by = 'MUSTERFRAU' last_changed_at = '20190702105400.3647680' )
      ( mykey = '02D5290E594C1EDA93815C50CD7AE62A' travel_id = '00000106' agency_id = '070005' customer_id = '000005' begin_date = '20190613' end_date = '20190716' booking_fee = '17.00' total_price = '650.00' currency_code = 'AFN'
        description = 'Enter your comments here' overall_status = 'A' created_by = 'MUSTERMANN' created_at = '20190613111129.2391370' last_changed_by = 'MUSTERMANN' last_changed_at = '20190711140753.1472620' )
      ( mykey = '02D5290E594C1EDA93858EED2DA2EB0B' travel_id = '00000103' agency_id = '070010' customer_id = '000011' begin_date = '20190610' end_date = '20190714' booking_fee = '17.00' total_price = '800.00' currency_code = 'AFN'
        description = 'Enter your comments here' overall_status = 'X' created_by = 'MUSTERFRAU' created_at = '20190613105654.4296640' last_changed_by = 'MUSTERFRAU' last_changed_at = '20190613111041.2251330' )
    ).

*   delete existing entries in the database table
    DELETE FROM ztravel_10001.

*   insert the new table entries
    INSERT ztravel_10001 FROM TABLE @itab.

*   output the result as a console message
    out->write( |{ sy-dbcnt } travel entries inserted successfully!| ).

  ENDMETHOD.
ENDCLASS.

Ctrl + F3 activates, F9 executes writing data

[4] Check Data

Switch to the Table tab and execute F8 to view the bottom table data.

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At this point, the customized base table has been completed.