ABAP Select data from SAP table RF057A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RF057A 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 RF057A. 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 RF057A 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_RF057A TYPE STANDARD TABLE OF RF057A,
      WA_RF057A TYPE RF057A,
      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: <RF057A> TYPE RF057A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RF057A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RF057A
  INTO TABLE IT_RF057A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RF057A
*  INTO TABLE @DATA(IT_RF057A2).
*--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_RF057A INDEX 1 INTO DATA(WA_RF057A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RF057A ASSIGNING <RF057A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RF057A>-KUNNR = 1.
<RF057A>-KKBER = 1.
<RF057A>-KLIMK = 1.
<RF057A>-WAERS = 1.
<RF057A>-DBEKR = 1.

ENDLOOP.

LOOP AT IT_RF057A INTO WA_RF057A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RF057A-DBWAE, sy-vline,
  WA_RF057A-KRAUS, sy-vline,
  WA_RF057A-DBPAY, sy-vline,
  WA_RF057A-DBRTG, sy-vline,
  WA_RF057A-REVDB, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RF057A 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_RF057A 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_RF057A INTO WA_RF057A.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF057A-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF057A-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU152, internal->external for field KLIMK
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_RF057A-KLIMK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF057A-KLIMK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU152, internal->external for field DBEKR
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_RF057A-DBEKR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF057A-DBEKR.
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_RF057A_STR, 
KUNNR TYPE STRING,
KKBER TYPE STRING,
KLIMK TYPE STRING,
WAERS TYPE STRING,
DBEKR TYPE STRING,
DBWAE TYPE STRING,
KRAUS TYPE STRING,
DBPAY TYPE STRING,
DBRTG TYPE STRING,
REVDB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RF057A_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_RF057A_STR-KUNNR sy-vline 
WA_RF057A_STR-KKBER sy-vline 
WA_RF057A_STR-KLIMK sy-vline 
WA_RF057A_STR-WAERS sy-vline 
WA_RF057A_STR-DBEKR sy-vline 
WA_RF057A_STR-DBWAE sy-vline 
WA_RF057A_STR-KRAUS sy-vline 
WA_RF057A_STR-DBPAY sy-vline 
WA_RF057A_STR-DBRTG sy-vline 
WA_RF057A_STR-REVDB sy-vline      INTO ld_text SEPARATED BY SPACE.

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