ABAP Select data from SAP table RM02A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM02A 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 RM02A. 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 RM02A 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_RM02A TYPE STANDARD TABLE OF RM02A,
      WA_RM02A TYPE RM02A,
      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: <RM02A> TYPE RM02A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM02A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM02A
  INTO TABLE IT_RM02A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM02A
*  INTO TABLE @DATA(IT_RM02A2).
*--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_RM02A INDEX 1 INTO DATA(WA_RM02A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM02A ASSIGNING <RM02A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM02A>-ABELU = 1.
<RM02A>-FILNR = 1.
<RM02A>-FINAM = 1.
<RM02A>-FIORT = 1.
<RM02A>-FILKL = 1.

ENDLOOP.

LOOP AT IT_RM02A INTO WA_RM02A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM02A-FILKB, sy-vline,
  WA_RM02A-ANZFI, sy-vline,
  WA_RM02A-LISTG, sy-vline,
  WA_RM02A-RUNDG, sy-vline,
  WA_RM02A-RESTV, sy-vline,
  WA_RM02A-VQUOT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM02A 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_RM02A 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_RM02A INTO WA_RM02A.


*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 FILNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM02A-FILNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM02A-FILNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RM02A-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM02A-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RM02A-AUFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM02A-AUFME.
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_RM02A_STR, 
ABELU TYPE STRING,
FILNR TYPE STRING,
FINAM TYPE STRING,
FIORT TYPE STRING,
FILKL TYPE STRING,
FILKB TYPE STRING,
ANZFI TYPE STRING,
LISTG TYPE STRING,
RUNDG TYPE STRING,
RESTV TYPE STRING,
VQUOT TYPE STRING,
VDIM TYPE STRING,
PMNGG TYPE STRING,
IMNGG TYPE STRING,
AMNGG TYPE STRING,
GPMNG TYPE STRING,
GWMNG TYPE STRING,
GIMNG TYPE STRING,
MMNGE TYPE STRING,
IMNGU TYPE STRING,
WMNGE TYPE STRING,
PMNGU TYPE STRING,
PMNGA TYPE STRING,
GMNGE TYPE STRING,
MEINH TYPE STRING,
AUFME TYPE STRING,
SELKZ TYPE STRING,
NREXP TYPE STRING,
LOEKZ TYPE STRING,
LIEFW TYPE STRING,
LFMNG TYPE STRING,
GPMGV TYPE STRING,
GIMGV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM02A_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_RM02A_STR-ABELU sy-vline 
WA_RM02A_STR-FILNR sy-vline 
WA_RM02A_STR-FINAM sy-vline 
WA_RM02A_STR-FIORT sy-vline 
WA_RM02A_STR-FILKL sy-vline 
WA_RM02A_STR-FILKB sy-vline 
WA_RM02A_STR-ANZFI sy-vline 
WA_RM02A_STR-LISTG sy-vline 
WA_RM02A_STR-RUNDG sy-vline 
WA_RM02A_STR-RESTV sy-vline 
WA_RM02A_STR-VQUOT sy-vline 
WA_RM02A_STR-VDIM sy-vline 
WA_RM02A_STR-PMNGG sy-vline 
WA_RM02A_STR-IMNGG sy-vline 
WA_RM02A_STR-AMNGG sy-vline 
WA_RM02A_STR-GPMNG sy-vline 
WA_RM02A_STR-GWMNG sy-vline 
WA_RM02A_STR-GIMNG sy-vline 
WA_RM02A_STR-MMNGE sy-vline 
WA_RM02A_STR-IMNGU sy-vline 
WA_RM02A_STR-WMNGE sy-vline 
WA_RM02A_STR-PMNGU sy-vline 
WA_RM02A_STR-PMNGA sy-vline 
WA_RM02A_STR-GMNGE sy-vline 
WA_RM02A_STR-MEINH sy-vline 
WA_RM02A_STR-AUFME sy-vline 
WA_RM02A_STR-SELKZ sy-vline 
WA_RM02A_STR-NREXP sy-vline 
WA_RM02A_STR-LOEKZ sy-vline 
WA_RM02A_STR-LIEFW sy-vline 
WA_RM02A_STR-LFMNG sy-vline 
WA_RM02A_STR-GPMGV sy-vline 
WA_RM02A_STR-GIMGV sy-vline      INTO ld_text SEPARATED BY SPACE.

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