ABAP Select data from SAP table RM03G into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM03G 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 RM03G. 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 RM03G 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_RM03G TYPE STANDARD TABLE OF RM03G,
      WA_RM03G TYPE RM03G,
      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: <RM03G> TYPE RM03G.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM03G.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM03G
  INTO TABLE IT_RM03G.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM03G
*  INTO TABLE @DATA(IT_RM03G2).
*--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_RM03G INDEX 1 INTO DATA(WA_RM03G2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM03G ASSIGNING <RM03G>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM03G>-MATNR = 1.
<RM03G>-WERKS = 1.
<RM03G>-LGORT = 1.
<RM03G>-BWKEY = 1.
<RM03G>-BWTAR = 1.

ENDLOOP.

LOOP AT IT_RM03G INTO WA_RM03G.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM03G-VKORG, sy-vline,
  WA_RM03G-VTWEG, sy-vline,
  WA_RM03G-LGNUM, sy-vline,
  WA_RM03G-LGTYP, sy-vline,
  WA_RM03G-LVOBW, sy-vline,
  WA_RM03G-LVOBK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM03G 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_RM03G 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_RM03G INTO WA_RM03G.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RM03G-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM03G-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR_VOR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RM03G-MATNR_VOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM03G-MATNR_VOR.
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_RM03G_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LVOBW TYPE STRING,
LVOBK TYPE STRING,
LVOMA TYPE STRING,
LVOWK TYPE STRING,
LVOLG TYPE STRING,
LVOLN TYPE STRING,
LVOLT TYPE STRING,
LVOVK TYPE STRING,
LVOBA TYPE STRING,
BUKRS TYPE STRING,
SANTW TYPE STRING,
BTAR1 TYPE STRING,
BTAR2 TYPE STRING,
BTAR3 TYPE STRING,
BTAR4 TYPE STRING,
LGNU1 TYPE STRING,
LGNU2 TYPE STRING,
LGNU3 TYPE STRING,
LGNU4 TYPE STRING,
LGTY1 TYPE STRING,
LGTY2 TYPE STRING,
TITEL1 TYPE STRING,
TITEL2 TYPE STRING,
TITEL3 TYPE STRING,
TITEL4 TYPE STRING,
MATNR_VOR TYPE STRING,
WERKS_VOR TYPE STRING,
LGORT_VOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM03G_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_RM03G_STR-MATNR sy-vline 
WA_RM03G_STR-WERKS sy-vline 
WA_RM03G_STR-LGORT sy-vline 
WA_RM03G_STR-BWKEY sy-vline 
WA_RM03G_STR-BWTAR sy-vline 
WA_RM03G_STR-VKORG sy-vline 
WA_RM03G_STR-VTWEG sy-vline 
WA_RM03G_STR-LGNUM sy-vline 
WA_RM03G_STR-LGTYP sy-vline 
WA_RM03G_STR-LVOBW sy-vline 
WA_RM03G_STR-LVOBK sy-vline 
WA_RM03G_STR-LVOMA sy-vline 
WA_RM03G_STR-LVOWK sy-vline 
WA_RM03G_STR-LVOLG sy-vline 
WA_RM03G_STR-LVOLN sy-vline 
WA_RM03G_STR-LVOLT sy-vline 
WA_RM03G_STR-LVOVK sy-vline 
WA_RM03G_STR-LVOBA sy-vline 
WA_RM03G_STR-BUKRS sy-vline 
WA_RM03G_STR-SANTW sy-vline 
WA_RM03G_STR-BTAR1 sy-vline 
WA_RM03G_STR-BTAR2 sy-vline 
WA_RM03G_STR-BTAR3 sy-vline 
WA_RM03G_STR-BTAR4 sy-vline 
WA_RM03G_STR-LGNU1 sy-vline 
WA_RM03G_STR-LGNU2 sy-vline 
WA_RM03G_STR-LGNU3 sy-vline 
WA_RM03G_STR-LGNU4 sy-vline 
WA_RM03G_STR-LGTY1 sy-vline 
WA_RM03G_STR-LGTY2 sy-vline 
WA_RM03G_STR-TITEL1 sy-vline 
WA_RM03G_STR-TITEL2 sy-vline 
WA_RM03G_STR-TITEL3 sy-vline 
WA_RM03G_STR-TITEL4 sy-vline 
WA_RM03G_STR-MATNR_VOR sy-vline 
WA_RM03G_STR-WERKS_VOR sy-vline 
WA_RM03G_STR-LGORT_VOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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