ABAP Select data from SAP table REBD_LOC_SYSTEM_HIER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REBD_LOC_SYSTEM_HIER
*  INTO TABLE @DATA(IT_REBD_LOC_SYSTEM_HIER2).
*--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_REBD_LOC_SYSTEM_HIER INDEX 1 INTO DATA(WA_REBD_LOC_SYSTEM_HIER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REBD_LOC_SYSTEM_HIER>-LOCSYS = 1.
<REBD_LOC_SYSTEM_HIER>-LOCHIER = 1.
<REBD_LOC_SYSTEM_HIER>-LOCITEM01 = 1.
<REBD_LOC_SYSTEM_HIER>-LOCITEM02 = 1.
<REBD_LOC_SYSTEM_HIER>-LOCITEM03 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REBD_LOC_SYSTEM_HIER-LOCITEM04, sy-vline,
  WA_REBD_LOC_SYSTEM_HIER-LOCITEM05, sy-vline,
  WA_REBD_LOC_SYSTEM_HIER-LOCITEM06, sy-vline,
  WA_REBD_LOC_SYSTEM_HIER-LOCITEM07, sy-vline,
  WA_REBD_LOC_SYSTEM_HIER-LOCITEM08, sy-vline,
  WA_REBD_LOC_SYSTEM_HIER-LOCITEM09, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REBD_LOC_SYSTEM_HIER 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_REBD_LOC_SYSTEM_HIER 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_REBD_LOC_SYSTEM_HIER INTO WA_REBD_LOC_SYSTEM_HIER.


*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_REBD_LOC_SYSTEM_HIER_STR, 
LOCSYS TYPE STRING,
LOCHIER TYPE STRING,
LOCITEM01 TYPE STRING,
LOCITEM02 TYPE STRING,
LOCITEM03 TYPE STRING,
LOCITEM04 TYPE STRING,
LOCITEM05 TYPE STRING,
LOCITEM06 TYPE STRING,
LOCITEM07 TYPE STRING,
LOCITEM08 TYPE STRING,
LOCITEM09 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REBD_LOC_SYSTEM_HIER_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_REBD_LOC_SYSTEM_HIER_STR-LOCSYS sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCHIER sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM01 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM02 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM03 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM04 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM05 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM06 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM07 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM08 sy-vline 
WA_REBD_LOC_SYSTEM_HIER_STR-LOCITEM09 sy-vline      INTO ld_text SEPARATED BY SPACE.

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