ABAP Select data from SAP table RM08WE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM08WE 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 RM08WE. 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 RM08WE 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_RM08WE TYPE STANDARD TABLE OF RM08WE,
      WA_RM08WE TYPE RM08WE,
      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: <RM08WE> TYPE RM08WE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM08WE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM08WE
  INTO TABLE IT_RM08WE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM08WE
*  INTO TABLE @DATA(IT_RM08WE2).
*--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_RM08WE INDEX 1 INTO DATA(WA_RM08WE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM08WE ASSIGNING <RM08WE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM08WE>-BELNR = 1.
<RM08WE>-GJAHR = 1.
<RM08WE>-BLDAT = 1.
<RM08WE>-BLART = 1.
<RM08WE>-MATBELEG = 1.

ENDLOOP.

LOOP AT IT_RM08WE INTO WA_RM08WE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM08WE-MATGJAHR, sy-vline,
  WA_RM08WE-MENGE, sy-vline,
  WA_RM08WE-MEINS, sy-vline,
  WA_RM08WE-BTR, sy-vline,
  WA_RM08WE-WAERS, sy-vline,
  WA_RM08WE-HKONT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM08WE 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_RM08WE 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_RM08WE INTO WA_RM08WE.


*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.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08WE-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08WE-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RM08WE-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08WE-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MATBELEG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08WE-MATBELEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08WE-MATBELEG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MATGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RM08WE-MATGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08WE-MATGJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RM08WE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08WE-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08WE-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08WE-HKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RM08WE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08WE-MATNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_RM08WE_STR, 
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLDAT TYPE STRING,
BLART TYPE STRING,
MATBELEG TYPE STRING,
MATGJAHR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
BTR TYPE STRING,
WAERS TYPE STRING,
HKONT TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
ZUONR TYPE STRING,
GSBER TYPE STRING,
PARGB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM08WE_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_RM08WE_STR-BELNR sy-vline 
WA_RM08WE_STR-GJAHR sy-vline 
WA_RM08WE_STR-BLDAT sy-vline 
WA_RM08WE_STR-BLART sy-vline 
WA_RM08WE_STR-MATBELEG sy-vline 
WA_RM08WE_STR-MATGJAHR sy-vline 
WA_RM08WE_STR-MENGE sy-vline 
WA_RM08WE_STR-MEINS sy-vline 
WA_RM08WE_STR-BTR sy-vline 
WA_RM08WE_STR-WAERS sy-vline 
WA_RM08WE_STR-HKONT sy-vline 
WA_RM08WE_STR-WERKS sy-vline 
WA_RM08WE_STR-MATNR sy-vline 
WA_RM08WE_STR-ZUONR sy-vline 
WA_RM08WE_STR-GSBER sy-vline 
WA_RM08WE_STR-PARGB sy-vline      INTO ld_text SEPARATED BY SPACE.

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