ABAP Select data from SAP table WSREGISTER_REQUEST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WSREGISTER_REQUEST table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to WSREGISTER_REQUEST. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the WSREGISTER_REQUEST table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_WSREGISTER_REQUEST TYPE STANDARD TABLE OF WSREGISTER_REQUEST,
      WA_WSREGISTER_REQUEST TYPE WSREGISTER_REQUEST,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <WSREGISTER_REQUEST> TYPE WSREGISTER_REQUEST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WSREGISTER_REQUEST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WSREGISTER_REQUEST
  INTO TABLE IT_WSREGISTER_REQUEST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSREGISTER_REQUEST
*  INTO TABLE @DATA(IT_WSREGISTER_REQUEST2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_WSREGISTER_REQUEST INDEX 1 INTO DATA(WA_WSREGISTER_REQUEST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WSREGISTER_REQUEST ASSIGNING <WSREGISTER_REQUEST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSREGISTER_REQUEST>-CONTROLLER = 1.
<WSREGISTER_REQUEST>-CALLING_SID = 1.
<WSREGISTER_REQUEST>-SEGMENT_TYPE = 1.
<WSREGISTER_REQUEST>-SOAP_REQUEST = 1.
<WSREGISTER_REQUEST>-CONTROLLER = 1.

ENDLOOP.

LOOP AT IT_WSREGISTER_REQUEST INTO WA_WSREGISTER_REQUEST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSREGISTER_REQUEST-CEN, sy-vline,
  WA_WSREGISTER_REQUEST-CONTROLLER, sy-vline,
  WA_WSREGISTER_REQUEST-SYSTEM_NAME, sy-vline,
  WA_WSREGISTER_REQUEST-DBHOST, sy-vline,
  WA_WSREGISTER_REQUEST-MESSAGE_SERVER, sy-vline,
  WA_WSREGISTER_REQUEST-ABAPCLIENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSREGISTER_REQUEST you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_WSREGISTER_REQUEST TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_WSREGISTER_REQUEST INTO WA_WSREGISTER_REQUEST.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WSREGISTER_REQUEST_STR, 
CONTROLLER TYPE STRING,
CALLING_SID TYPE STRING,
SEGMENT_TYPE TYPE STRING,
SOAP_REQUEST TYPE STRING,
CONTROLLER TYPE STRING,
CEN TYPE STRING,
CONTROLLER TYPE STRING,
SYSTEM_NAME TYPE STRING,
DBHOST TYPE STRING,
MESSAGE_SERVER TYPE STRING,
ABAPCLIENT TYPE STRING,
CONTROLLER TYPE STRING,
CSMREG_CLIENT TYPE STRING,
CSMREG_USER TYPE STRING,
CSMREG_PASSWORD TYPE STRING,
CSMREG_LANGUAGE TYPE STRING,
USE_LOGON_BALANCING TYPE STRING,
LOGON_GROUP TYPE STRING,
HOSTNAME TYPE STRING,
SYSTEM_NUMBER TYPE STRING,
ROUTE_STRING TYPE STRING,
TRACE_LEVEL TYPE STRING,
MANAGED_SYSTEM_NAME TYPE STRING,
FORCE_REGISTRATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSREGISTER_REQUEST_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_WSREGISTER_REQUEST_STR-CONTROLLER sy-vline 
WA_WSREGISTER_REQUEST_STR-CALLING_SID sy-vline 
WA_WSREGISTER_REQUEST_STR-SEGMENT_TYPE sy-vline 
WA_WSREGISTER_REQUEST_STR-SOAP_REQUEST sy-vline 
WA_WSREGISTER_REQUEST_STR-CONTROLLER sy-vline 
WA_WSREGISTER_REQUEST_STR-CEN sy-vline 
WA_WSREGISTER_REQUEST_STR-CONTROLLER sy-vline 
WA_WSREGISTER_REQUEST_STR-SYSTEM_NAME sy-vline 
WA_WSREGISTER_REQUEST_STR-DBHOST sy-vline 
WA_WSREGISTER_REQUEST_STR-MESSAGE_SERVER sy-vline 
WA_WSREGISTER_REQUEST_STR-ABAPCLIENT sy-vline 
WA_WSREGISTER_REQUEST_STR-CONTROLLER sy-vline 
WA_WSREGISTER_REQUEST_STR-CSMREG_CLIENT sy-vline 
WA_WSREGISTER_REQUEST_STR-CSMREG_USER sy-vline 
WA_WSREGISTER_REQUEST_STR-CSMREG_PASSWORD sy-vline 
WA_WSREGISTER_REQUEST_STR-CSMREG_LANGUAGE sy-vline 
WA_WSREGISTER_REQUEST_STR-USE_LOGON_BALANCING sy-vline 
WA_WSREGISTER_REQUEST_STR-LOGON_GROUP sy-vline 
WA_WSREGISTER_REQUEST_STR-HOSTNAME sy-vline 
WA_WSREGISTER_REQUEST_STR-SYSTEM_NUMBER sy-vline 
WA_WSREGISTER_REQUEST_STR-ROUTE_STRING sy-vline 
WA_WSREGISTER_REQUEST_STR-TRACE_LEVEL sy-vline 
WA_WSREGISTER_REQUEST_STR-MANAGED_SYSTEM_NAME sy-vline 
WA_WSREGISTER_REQUEST_STR-FORCE_REGISTRATION sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.