ABAP Select data from SAP table RFIAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFIAD
*  INTO TABLE @DATA(IT_RFIAD2).
*--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_RFIAD INDEX 1 INTO DATA(WA_RFIAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFIAD>-ANWND = 1.
<RFIAD>-KTOPL = 1.
<RFIAD>-LTXT1 = 1.
<RFIAD>-LTXT2 = 1.
<RFIAD>-LTXT3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFIAD-LTXT4, sy-vline,
  WA_RFIAD-LTXT5, sy-vline,
  WA_RFIAD-LTXT6, sy-vline,
  WA_RFIAD-EIGN1, sy-vline,
  WA_RFIAD-EIGN2, sy-vline,
  WA_RFIAD-EIGN3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFIAD 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_RFIAD 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_RFIAD INTO WA_RFIAD.


*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_RFIAD_STR, 
ANWND TYPE STRING,
KTOPL TYPE STRING,
LTXT1 TYPE STRING,
LTXT2 TYPE STRING,
LTXT3 TYPE STRING,
LTXT4 TYPE STRING,
LTXT5 TYPE STRING,
LTXT6 TYPE STRING,
EIGN1 TYPE STRING,
EIGN2 TYPE STRING,
EIGN3 TYPE STRING,
EIGN4 TYPE STRING,
LTXTA TYPE STRING,
LTXTB TYPE STRING,
LTXTC TYPE STRING,
LTXTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFIAD_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_RFIAD_STR-ANWND sy-vline 
WA_RFIAD_STR-KTOPL sy-vline 
WA_RFIAD_STR-LTXT1 sy-vline 
WA_RFIAD_STR-LTXT2 sy-vline 
WA_RFIAD_STR-LTXT3 sy-vline 
WA_RFIAD_STR-LTXT4 sy-vline 
WA_RFIAD_STR-LTXT5 sy-vline 
WA_RFIAD_STR-LTXT6 sy-vline 
WA_RFIAD_STR-EIGN1 sy-vline 
WA_RFIAD_STR-EIGN2 sy-vline 
WA_RFIAD_STR-EIGN3 sy-vline 
WA_RFIAD_STR-EIGN4 sy-vline 
WA_RFIAD_STR-LTXTA sy-vline 
WA_RFIAD_STR-LTXTB sy-vline 
WA_RFIAD_STR-LTXTC sy-vline 
WA_RFIAD_STR-LTXTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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