ABAP Select data from SAP table RMF64KKM02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RMF64KKM02 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 RMF64KKM02. 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 RMF64KKM02 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_RMF64KKM02 TYPE STANDARD TABLE OF RMF64KKM02,
      WA_RMF64KKM02 TYPE RMF64KKM02,
      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: <RMF64KKM02> TYPE RMF64KKM02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RMF64KKM02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RMF64KKM02
  INTO TABLE IT_RMF64KKM02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMF64KKM02
*  INTO TABLE @DATA(IT_RMF64KKM022).
*--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_RMF64KKM02 INDEX 1 INTO DATA(WA_RMF64KKM022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RMF64KKM02 ASSIGNING <RMF64KKM02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMF64KKM02>-MANDT = 1.
<RMF64KKM02>-POSNR = 1.
<RMF64KKM02>-REFRANL = 1.
<RMF64KKM02>-REFUNIT = 1.
<RMF64KKM02>-AUSART = 1.

ENDLOOP.

LOOP AT IT_RMF64KKM02 INTO WA_RMF64KKM02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMF64KKM02-RANL, sy-vline,
  WA_RMF64KKM02-VZ, sy-vline,
  WA_RMF64KKM02-BESTAEN, sy-vline,
  WA_RMF64KKM02-BESTAEN_NUMC, sy-vline,
  WA_RMF64KKM02-BWKOMP, sy-vline,
  WA_RMF64KKM02-BWFAKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMF64KKM02 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_RMF64KKM02 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_RMF64KKM02 INTO WA_RMF64KKM02.


*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 REFRANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMF64KKM02-REFRANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMF64KKM02-REFRANL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMF64KKM02-RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMF64KKM02-RANL.
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_RMF64KKM02_STR, 
MANDT TYPE STRING,
POSNR TYPE STRING,
REFRANL TYPE STRING,
REFUNIT TYPE STRING,
AUSART TYPE STRING,
RANL TYPE STRING,
VZ TYPE STRING,
BESTAEN TYPE STRING,
BESTAEN_NUMC TYPE STRING,
BWKOMP TYPE STRING,
BWFAKT TYPE STRING,
BWFAKT_NUMC TYPE STRING,
BWKONST TYPE STRING,
WAEHRUNG TYPE STRING,
REF6B TYPE STRING,
KGV_FLAG TYPE STRING,
MARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMF64KKM02_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_RMF64KKM02_STR-MANDT sy-vline 
WA_RMF64KKM02_STR-POSNR sy-vline 
WA_RMF64KKM02_STR-REFRANL sy-vline 
WA_RMF64KKM02_STR-REFUNIT sy-vline 
WA_RMF64KKM02_STR-AUSART sy-vline 
WA_RMF64KKM02_STR-RANL sy-vline 
WA_RMF64KKM02_STR-VZ sy-vline 
WA_RMF64KKM02_STR-BESTAEN sy-vline 
WA_RMF64KKM02_STR-BESTAEN_NUMC sy-vline 
WA_RMF64KKM02_STR-BWKOMP sy-vline 
WA_RMF64KKM02_STR-BWFAKT sy-vline 
WA_RMF64KKM02_STR-BWFAKT_NUMC sy-vline 
WA_RMF64KKM02_STR-BWKONST sy-vline 
WA_RMF64KKM02_STR-WAEHRUNG sy-vline 
WA_RMF64KKM02_STR-REF6B sy-vline 
WA_RMF64KKM02_STR-KGV_FLAG sy-vline 
WA_RMF64KKM02_STR-MARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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