ABAP Select data from SAP table AFWGO_KFCLASSIFICATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFWGO_KFCLASSIFICATION
*  INTO TABLE @DATA(IT_AFWGO_KFCLASSIFICATION2).
*--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_AFWGO_KFCLASSIFICATION INDEX 1 INTO DATA(WA_AFWGO_KFCLASSIFICATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFWGO_KFCLASSIFICATION>-KEYFIGURE = 1.
<AFWGO_KFCLASSIFICATION>-KFCATE = 1.
<AFWGO_KFCLASSIFICATION>-KFCATE = 1.
<AFWGO_KFCLASSIFICATION>-APPLICATION = 1.
<AFWGO_KFCLASSIFICATION>-BFCATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFWGO_KFCLASSIFICATION-BFCATE2, sy-vline,
  WA_AFWGO_KFCLASSIFICATION-TABNATTRIB, sy-vline,
  WA_AFWGO_KFCLASSIFICATION-TABHATTRIB, sy-vline,
  WA_AFWGO_KFCLASSIFICATION-XGEN, sy-vline,
  WA_AFWGO_KFCLASSIFICATION-XCURR, sy-vline,
  WA_AFWGO_KFCLASSIFICATION-XRECORD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFWGO_KFCLASSIFICATION 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_AFWGO_KFCLASSIFICATION 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_AFWGO_KFCLASSIFICATION INTO WA_AFWGO_KFCLASSIFICATION.


*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 ALFAN, internal->external for field KEYFIGURE
CALL FUNCTION 'CONVERSION_EXIT_ALFAN_OUTPUT'
  EXPORTING
    input =                      WA_AFWGO_KFCLASSIFICATION-KEYFIGURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFWGO_KFCLASSIFICATION-KEYFIGURE.
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_AFWGO_KFCLASSIFICATION_STR, 
KEYFIGURE TYPE STRING,
KFCATE TYPE STRING,
KFCATE TYPE STRING,
APPLICATION TYPE STRING,
BFCATE TYPE STRING,
BFCATE2 TYPE STRING,
TABNATTRIB TYPE STRING,
TABHATTRIB TYPE STRING,
XGEN TYPE STRING,
XCURR TYPE STRING,
XRECORD TYPE STRING,
XFINAL TYPE STRING,
XADD TYPE STRING,
UNITID TYPE STRING,
XGEN TYPE STRING,
XCURR TYPE STRING,
XRECORD TYPE STRING,
XFINAL TYPE STRING,
XADD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFWGO_KFCLASSIFICATION_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_AFWGO_KFCLASSIFICATION_STR-KEYFIGURE sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-KFCATE sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-KFCATE sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-APPLICATION sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-BFCATE sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-BFCATE2 sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-TABNATTRIB sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-TABHATTRIB sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XGEN sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XCURR sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XRECORD sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XFINAL sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XADD sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-UNITID sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XGEN sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XCURR sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XRECORD sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XFINAL sy-vline 
WA_AFWGO_KFCLASSIFICATION_STR-XADD sy-vline      INTO ld_text SEPARATED BY SPACE.

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