ABAP Select data from SAP table RM03O into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM03O 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 RM03O. 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 RM03O 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_RM03O TYPE STANDARD TABLE OF RM03O,
      WA_RM03O TYPE RM03O,
      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: <RM03O> TYPE RM03O.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM03O.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM03O
  INTO TABLE IT_RM03O.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM03O
*  INTO TABLE @DATA(IT_RM03O2).
*--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_RM03O INDEX 1 INTO DATA(WA_RM03O2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM03O ASSIGNING <RM03O>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM03O>-STATM = 1.
<RM03O>-ERSDA = 1.
<RM03O>-WERKS = 1.
<RM03O>-VKORG = 1.
<RM03O>-EKORG = 1.

ENDLOOP.

LOOP AT IT_RM03O INTO WA_RM03O.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM03O-BWKEY, sy-vline,
  WA_RM03O-MATNR, sy-vline,
  WA_RM03O-MTART, sy-vline,
  WA_RM03O-MBRSH, sy-vline,
  WA_RM03O-LGORT, sy-vline,
  WA_RM03O-MAKTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM03O 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_RM03O 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_RM03O INTO WA_RM03O.


*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_RM03O-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM03O-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field REF_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RM03O-REF_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM03O-REF_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_RM03O_STR, 
STATM TYPE STRING,
ERSDA TYPE STRING,
WERKS TYPE STRING,
VKORG TYPE STRING,
EKORG TYPE STRING,
BWKEY TYPE STRING,
MATNR TYPE STRING,
MTART TYPE STRING,
MBRSH TYPE STRING,
LGORT TYPE STRING,
MAKTX TYPE STRING,
BEAKZ TYPE STRING,
LSEIT TYPE STRING,
MAXSE TYPE STRING,
SELKZ TYPE STRING,
DATUM TYPE STRING,
HBUKR TYPE STRING,
BUKRS TYPE STRING,
LGNUM TYPE STRING,
VTWEG TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
TEXT4 TYPE STRING,
TEXT5 TYPE STRING,
TEXT6 TYPE STRING,
REF_MATNR TYPE STRING,
REF_WERKS TYPE STRING,
REF_LGORT TYPE STRING,
REF_BWKEY TYPE STRING,
REF_BUKRS TYPE STRING,
REF_VKORG TYPE STRING,
REF_VTWEG TYPE STRING,
REF_LGNUM TYPE STRING,
REF_LGTYP TYPE STRING,
ORGKZ TYPE STRING,
DATAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM03O_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_RM03O_STR-STATM sy-vline 
WA_RM03O_STR-ERSDA sy-vline 
WA_RM03O_STR-WERKS sy-vline 
WA_RM03O_STR-VKORG sy-vline 
WA_RM03O_STR-EKORG sy-vline 
WA_RM03O_STR-BWKEY sy-vline 
WA_RM03O_STR-MATNR sy-vline 
WA_RM03O_STR-MTART sy-vline 
WA_RM03O_STR-MBRSH sy-vline 
WA_RM03O_STR-LGORT sy-vline 
WA_RM03O_STR-MAKTX sy-vline 
WA_RM03O_STR-BEAKZ sy-vline 
WA_RM03O_STR-LSEIT sy-vline 
WA_RM03O_STR-MAXSE sy-vline 
WA_RM03O_STR-SELKZ sy-vline 
WA_RM03O_STR-DATUM sy-vline 
WA_RM03O_STR-HBUKR sy-vline 
WA_RM03O_STR-BUKRS sy-vline 
WA_RM03O_STR-LGNUM sy-vline 
WA_RM03O_STR-VTWEG sy-vline 
WA_RM03O_STR-TEXT1 sy-vline 
WA_RM03O_STR-TEXT2 sy-vline 
WA_RM03O_STR-TEXT3 sy-vline 
WA_RM03O_STR-TEXT4 sy-vline 
WA_RM03O_STR-TEXT5 sy-vline 
WA_RM03O_STR-TEXT6 sy-vline 
WA_RM03O_STR-REF_MATNR sy-vline 
WA_RM03O_STR-REF_WERKS sy-vline 
WA_RM03O_STR-REF_LGORT sy-vline 
WA_RM03O_STR-REF_BWKEY sy-vline 
WA_RM03O_STR-REF_BUKRS sy-vline 
WA_RM03O_STR-REF_VKORG sy-vline 
WA_RM03O_STR-REF_VTWEG sy-vline 
WA_RM03O_STR-REF_LGNUM sy-vline 
WA_RM03O_STR-REF_LGTYP sy-vline 
WA_RM03O_STR-ORGKZ sy-vline 
WA_RM03O_STR-DATAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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