ABAP Select data from SAP table RKD_S_HIE_SELECTION into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKD_S_HIE_SELECTION 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 RKD_S_HIE_SELECTION. 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 RKD_S_HIE_SELECTION 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_RKD_S_HIE_SELECTION TYPE STANDARD TABLE OF RKD_S_HIE_SELECTION,
      WA_RKD_S_HIE_SELECTION TYPE RKD_S_HIE_SELECTION,
      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: <RKD_S_HIE_SELECTION> TYPE RKD_S_HIE_SELECTION.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKD_S_HIE_SELECTION
*  INTO TABLE @DATA(IT_RKD_S_HIE_SELECTION2).
*--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_RKD_S_HIE_SELECTION INDEX 1 INTO DATA(WA_RKD_S_HIE_SELECTION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKD_S_HIE_SELECTION>-CHARACTERISTIC = 1.
<RKD_S_HIE_SELECTION>-CHARACTER_TXT = 1.
<RKD_S_HIE_SELECTION>-HSEL_TYPE = 1.
<RKD_S_HIE_SELECTION>-HCLASS = 1.
<RKD_S_HIE_SELECTION>-HIENM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKD_S_HIE_SELECTION-HINFO_TABIX, sy-vline,
  WA_RKD_S_HIE_SELECTION-VNAM, sy-vline,
  WA_RKD_S_HIE_SELECTION-HTEXT, sy-vline,
  WA_RKD_S_HIE_SELECTION-CHOICE, sy-vline,
  WA_RKD_S_HIE_SELECTION-HGRP_HCLASS, sy-vline,
  WA_RKD_S_HIE_SELECTION-HGRP_HCL_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKD_S_HIE_SELECTION 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_RKD_S_HIE_SELECTION 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_RKD_S_HIE_SELECTION INTO WA_RKD_S_HIE_SELECTION.


*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_RKD_S_HIE_SELECTION_STR, 
CHARACTERISTIC TYPE STRING,
CHARACTER_TXT TYPE STRING,
HSEL_TYPE TYPE STRING,
HCLASS TYPE STRING,
HIENM TYPE STRING,
HINFO_TABIX TYPE STRING,
VNAM TYPE STRING,
HTEXT TYPE STRING,
CHOICE TYPE STRING,
HGRP_HCLASS TYPE STRING,
HGRP_HCL_TEXT TYPE STRING,
HPRSTN TYPE STRING,
HPRSTN_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKD_S_HIE_SELECTION_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_RKD_S_HIE_SELECTION_STR-CHARACTERISTIC sy-vline 
WA_RKD_S_HIE_SELECTION_STR-CHARACTER_TXT sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HSEL_TYPE sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HCLASS sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HIENM sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HINFO_TABIX sy-vline 
WA_RKD_S_HIE_SELECTION_STR-VNAM sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HTEXT sy-vline 
WA_RKD_S_HIE_SELECTION_STR-CHOICE sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HGRP_HCLASS sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HGRP_HCL_TEXT sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HPRSTN sy-vline 
WA_RKD_S_HIE_SELECTION_STR-HPRSTN_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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