ABAP Select data from SAP table RM08X into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM08X 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 RM08X. 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 RM08X 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_RM08X TYPE STANDARD TABLE OF RM08X,
      WA_RM08X TYPE RM08X,
      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: <RM08X> TYPE RM08X.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM08X.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM08X
  INTO TABLE IT_RM08X.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM08X
*  INTO TABLE @DATA(IT_RM08X2).
*--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_RM08X INDEX 1 INTO DATA(WA_RM08X2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM08X ASSIGNING <RM08X>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM08X>-BELNR = 1.
<RM08X>-BISSL = 1.
<RM08X>-BUKRS = 1.
<RM08X>-CPAGE = 1.
<RM08X>-EKGRP = 1.

ENDLOOP.

LOOP AT IT_RM08X INTO WA_RM08X.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM08X-GJAHR, sy-vline,
  WA_RM08X-KONTO, sy-vline,
  WA_RM08X-KTEXT, sy-vline,
  WA_RM08X-LTEXT, sy-vline,
  WA_RM08X-STREP, sy-vline,
  WA_RM08X-STRSB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM08X 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_RM08X 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_RM08X INTO WA_RM08X.


*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_RM08X-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08X-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RM08X-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08X-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KONTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08X-KONTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08X-KONTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08X-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08X-LIFNR.
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_RM08X_STR, 
BELNR TYPE STRING,
BISSL TYPE STRING,
BUKRS TYPE STRING,
CPAGE TYPE STRING,
EKGRP TYPE STRING,
GJAHR TYPE STRING,
KONTO TYPE STRING,
KTEXT TYPE STRING,
LTEXT TYPE STRING,
STREP TYPE STRING,
STRSB TYPE STRING,
STRTK TYPE STRING,
SONVA TYPE STRING,
SUVAR TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
TPAGE TYPE STRING,
VARNR TYPE STRING,
LIFNR TYPE STRING,
VONSL TYPE STRING,
VRBEZ TYPE STRING,
XDESC TYPE STRING,
XJA TYPE STRING,
XNEIN TYPE STRING,
XSFSW TYPE STRING,
XSTRG TYPE STRING,
XSUCH TYPE STRING,
XSUMA TYPE STRING,
XASPE TYPE STRING,
XINIT TYPE STRING,
XSSPE TYPE STRING,
XFREI TYPE STRING,
XZFBD TYPE STRING,
SPGRM TYPE STRING,
SPGRP TYPE STRING,
SPGRT TYPE STRING,
SPGRG TYPE STRING,
SPGRV TYPE STRING,
SPGRQ TYPE STRING,
SPGRS TYPE STRING,
SPGRC TYPE STRING,
ZEIAU TYPE STRING,
ZLSPR TYPE STRING,
ZUSFE TYPE STRING,
J_1NK TYPE STRING,
J_1NK_NEW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM08X_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_RM08X_STR-BELNR sy-vline 
WA_RM08X_STR-BISSL sy-vline 
WA_RM08X_STR-BUKRS sy-vline 
WA_RM08X_STR-CPAGE sy-vline 
WA_RM08X_STR-EKGRP sy-vline 
WA_RM08X_STR-GJAHR sy-vline 
WA_RM08X_STR-KONTO sy-vline 
WA_RM08X_STR-KTEXT sy-vline 
WA_RM08X_STR-LTEXT sy-vline 
WA_RM08X_STR-STREP sy-vline 
WA_RM08X_STR-STRSB sy-vline 
WA_RM08X_STR-STRTK sy-vline 
WA_RM08X_STR-SONVA sy-vline 
WA_RM08X_STR-SUVAR sy-vline 
WA_RM08X_STR-TEXT1 sy-vline 
WA_RM08X_STR-TEXT2 sy-vline 
WA_RM08X_STR-TEXT3 sy-vline 
WA_RM08X_STR-TPAGE sy-vline 
WA_RM08X_STR-VARNR sy-vline 
WA_RM08X_STR-LIFNR sy-vline 
WA_RM08X_STR-VONSL sy-vline 
WA_RM08X_STR-VRBEZ sy-vline 
WA_RM08X_STR-XDESC sy-vline 
WA_RM08X_STR-XJA sy-vline 
WA_RM08X_STR-XNEIN sy-vline 
WA_RM08X_STR-XSFSW sy-vline 
WA_RM08X_STR-XSTRG sy-vline 
WA_RM08X_STR-XSUCH sy-vline 
WA_RM08X_STR-XSUMA sy-vline 
WA_RM08X_STR-XASPE sy-vline 
WA_RM08X_STR-XINIT sy-vline 
WA_RM08X_STR-XSSPE sy-vline 
WA_RM08X_STR-XFREI sy-vline 
WA_RM08X_STR-XZFBD sy-vline 
WA_RM08X_STR-SPGRM sy-vline 
WA_RM08X_STR-SPGRP sy-vline 
WA_RM08X_STR-SPGRT sy-vline 
WA_RM08X_STR-SPGRG sy-vline 
WA_RM08X_STR-SPGRV sy-vline 
WA_RM08X_STR-SPGRQ sy-vline 
WA_RM08X_STR-SPGRS sy-vline 
WA_RM08X_STR-SPGRC sy-vline 
WA_RM08X_STR-ZEIAU sy-vline 
WA_RM08X_STR-ZLSPR sy-vline 
WA_RM08X_STR-ZUSFE sy-vline 
WA_RM08X_STR-J_1NK sy-vline 
WA_RM08X_STR-J_1NK_NEW sy-vline      INTO ld_text SEPARATED BY SPACE.

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