ABAP Select data from SAP table ARF_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ARF_EXT
*  INTO TABLE @DATA(IT_ARF_EXT2).
*--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_ARF_EXT INDEX 1 INTO DATA(WA_ARF_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ARF_EXT>-BUKRS = 1.
<ARF_EXT>-GJAHR = 1.
<ARF_EXT>-AFABE = 1.
<ARF_EXT>-KTOGR = 1.
<ARF_EXT>-ANLN1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ARF_EXT-ANLN2, sy-vline,
  WA_ARF_EXT-XAFAR, sy-vline,
  WA_ARF_EXT-NALT, sy-vline,
  WA_ARF_EXT-NNEU, sy-vline,
  WA_ARF_EXT-SALT, sy-vline,
  WA_ARF_EXT-SNEU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ARF_EXT 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_ARF_EXT 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_ARF_EXT INTO WA_ARF_EXT.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTOGR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-KTOGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-KTOGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field NALT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-NALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-NALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field NNEU
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-NNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-NNEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field SALT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-SALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-SALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field SNEU
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-SNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-SNEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZALT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-ZALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-ZALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZNEU
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-ZNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-ZNEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field AWALT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-AWALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-AWALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field AWNEU
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-AWNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-AWNEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ANALT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-ANALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-ANALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ANNEU
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ARF_EXT-ANNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ARF_EXT-ANNEU.
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_ARF_EXT_STR, 
BUKRS TYPE STRING,
GJAHR TYPE STRING,
AFABE TYPE STRING,
KTOGR TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
XAFAR TYPE STRING,
NALT TYPE STRING,
NNEU TYPE STRING,
SALT TYPE STRING,
SNEU TYPE STRING,
ZALT TYPE STRING,
ZNEU TYPE STRING,
AWALT TYPE STRING,
AWNEU TYPE STRING,
ANALT TYPE STRING,
ANNEU TYPE STRING,
TXT50 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ARF_EXT_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_ARF_EXT_STR-BUKRS sy-vline 
WA_ARF_EXT_STR-GJAHR sy-vline 
WA_ARF_EXT_STR-AFABE sy-vline 
WA_ARF_EXT_STR-KTOGR sy-vline 
WA_ARF_EXT_STR-ANLN1 sy-vline 
WA_ARF_EXT_STR-ANLN2 sy-vline 
WA_ARF_EXT_STR-XAFAR sy-vline 
WA_ARF_EXT_STR-NALT sy-vline 
WA_ARF_EXT_STR-NNEU sy-vline 
WA_ARF_EXT_STR-SALT sy-vline 
WA_ARF_EXT_STR-SNEU sy-vline 
WA_ARF_EXT_STR-ZALT sy-vline 
WA_ARF_EXT_STR-ZNEU sy-vline 
WA_ARF_EXT_STR-AWALT sy-vline 
WA_ARF_EXT_STR-AWNEU sy-vline 
WA_ARF_EXT_STR-ANALT sy-vline 
WA_ARF_EXT_STR-ANNEU sy-vline 
WA_ARF_EXT_STR-TXT50 sy-vline      INTO ld_text SEPARATED BY SPACE.

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