ABAP Select data from SAP table RMFAW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMFAW
*  INTO TABLE @DATA(IT_RMFAW2).
*--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_RMFAW INDEX 1 INTO DATA(WA_RMFAW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMFAW>-PROG = 1.
<RMFAW>-DYNGRP = 1.
<RMFAW>-REPTI = 1.
<RMFAW>-DGRTEXT = 1.
<RMFAW>-MFELD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMFAW-MNUM, sy-vline,
  WA_RMFAW-BFELD1, sy-vline,
  WA_RMFAW-PFLEGE1, sy-vline,
  WA_RMFAW-LOEVM1, sy-vline,
  WA_RMFAW-BFELD2, sy-vline,
  WA_RMFAW-BWERT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMFAW 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_RMFAW 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_RMFAW INTO WA_RMFAW.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RMFAW_STR, 
PROG TYPE STRING,
DYNGRP TYPE STRING,
REPTI TYPE STRING,
DGRTEXT TYPE STRING,
MFELD TYPE STRING,
MNUM TYPE STRING,
BFELD1 TYPE STRING,
PFLEGE1 TYPE STRING,
LOEVM1 TYPE STRING,
BFELD2 TYPE STRING,
BWERT2 TYPE STRING,
BOPER2 TYPE STRING,
NBED2 TYPE STRING,
BEINF2 TYPE STRING,
RINP TYPE STRING,
RREQ TYPE STRING,
ROUT TYPE STRING,
RACT TYPE STRING,
RINT TYPE STRING,
RINV TYPE STRING,
BFELD TYPE STRING,
BWERT TYPE STRING,
BOPER TYPE STRING,
NBED TYPE STRING,
SINP TYPE STRING,
SREQ TYPE STRING,
SOUT TYPE STRING,
SACT TYPE STRING,
SINT TYPE STRING,
SINV TYPE STRING,
RINDEX TYPE STRING,
LOEVM TYPE STRING,
BTEXT TYPE STRING,
MTEXT TYPE STRING,
TABTEXT TYPE STRING,
XFELD TYPE STRING,
TABELLE TYPE STRING,
BDEF TYPE STRING,
CUST_M TYPE STRING,
CUST_B TYPE STRING,
CUST_MODE TYPE STRING,
MFELD1 TYPE STRING,
LISTCHOICE TYPE STRING,
BFLD_RADIO TYPE STRING,
MFLD_RADIO TYPE STRING,
ASSI_RADIO TYPE STRING,
ANZE_PUSH TYPE STRING,
AEND_PUSH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMFAW_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_RMFAW_STR-PROG sy-vline 
WA_RMFAW_STR-DYNGRP sy-vline 
WA_RMFAW_STR-REPTI sy-vline 
WA_RMFAW_STR-DGRTEXT sy-vline 
WA_RMFAW_STR-MFELD sy-vline 
WA_RMFAW_STR-MNUM sy-vline 
WA_RMFAW_STR-BFELD1 sy-vline 
WA_RMFAW_STR-PFLEGE1 sy-vline 
WA_RMFAW_STR-LOEVM1 sy-vline 
WA_RMFAW_STR-BFELD2 sy-vline 
WA_RMFAW_STR-BWERT2 sy-vline 
WA_RMFAW_STR-BOPER2 sy-vline 
WA_RMFAW_STR-NBED2 sy-vline 
WA_RMFAW_STR-BEINF2 sy-vline 
WA_RMFAW_STR-RINP sy-vline 
WA_RMFAW_STR-RREQ sy-vline 
WA_RMFAW_STR-ROUT sy-vline 
WA_RMFAW_STR-RACT sy-vline 
WA_RMFAW_STR-RINT sy-vline 
WA_RMFAW_STR-RINV sy-vline 
WA_RMFAW_STR-BFELD sy-vline 
WA_RMFAW_STR-BWERT sy-vline 
WA_RMFAW_STR-BOPER sy-vline 
WA_RMFAW_STR-NBED sy-vline 
WA_RMFAW_STR-SINP sy-vline 
WA_RMFAW_STR-SREQ sy-vline 
WA_RMFAW_STR-SOUT sy-vline 
WA_RMFAW_STR-SACT sy-vline 
WA_RMFAW_STR-SINT sy-vline 
WA_RMFAW_STR-SINV sy-vline 
WA_RMFAW_STR-RINDEX sy-vline 
WA_RMFAW_STR-LOEVM sy-vline 
WA_RMFAW_STR-BTEXT sy-vline 
WA_RMFAW_STR-MTEXT sy-vline 
WA_RMFAW_STR-TABTEXT sy-vline 
WA_RMFAW_STR-XFELD sy-vline 
WA_RMFAW_STR-TABELLE sy-vline 
WA_RMFAW_STR-BDEF sy-vline 
WA_RMFAW_STR-CUST_M sy-vline 
WA_RMFAW_STR-CUST_B sy-vline 
WA_RMFAW_STR-CUST_MODE sy-vline 
WA_RMFAW_STR-MFELD1 sy-vline 
WA_RMFAW_STR-LISTCHOICE sy-vline 
WA_RMFAW_STR-BFLD_RADIO sy-vline 
WA_RMFAW_STR-MFLD_RADIO sy-vline 
WA_RMFAW_STR-ASSI_RADIO sy-vline 
WA_RMFAW_STR-ANZE_PUSH sy-vline 
WA_RMFAW_STR-AEND_PUSH sy-vline      INTO ld_text SEPARATED BY SPACE.

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