ABAP Select data from SAP table FKKOPW_NC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKOPW_NC
*  INTO TABLE @DATA(IT_FKKOPW_NC2).
*--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_FKKOPW_NC INDEX 1 INTO DATA(WA_FKKOPW_NC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKOPW_NC>-GPART = 1.
<FKKOPW_NC>-VKONT = 1.
<FKKOPW_NC>-ABWBL = 1.
<FKKOPW_NC>-ABWTP = 1.
<FKKOPW_NC>-BUDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKOPW_NC-AUGDT, sy-vline,
  WA_FKKOPW_NC-AUGBL, sy-vline,
  WA_FKKOPW_NC-AUGBD, sy-vline,
  WA_FKKOPW_NC-AUGRD, sy-vline,
  WA_FKKOPW_NC-AUGVD, sy-vline,
  WA_FKKOPW_NC-AUGOB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKOPW_NC 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_FKKOPW_NC 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_FKKOPW_NC INTO WA_FKKOPW_NC.


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

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

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

*Conversion exit ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKOPW_NC-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKOPW_NC-AUGBL.
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_FKKOPW_NC_STR, 
GPART TYPE STRING,
VKONT TYPE STRING,
ABWBL TYPE STRING,
ABWTP TYPE STRING,
BUDAT TYPE STRING,
AUGDT TYPE STRING,
AUGBL TYPE STRING,
AUGBD TYPE STRING,
AUGRD TYPE STRING,
AUGVD TYPE STRING,
AUGOB TYPE STRING,
XAUFL TYPE STRING,
XRAGL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKOPW_NC_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_FKKOPW_NC_STR-GPART sy-vline 
WA_FKKOPW_NC_STR-VKONT sy-vline 
WA_FKKOPW_NC_STR-ABWBL sy-vline 
WA_FKKOPW_NC_STR-ABWTP sy-vline 
WA_FKKOPW_NC_STR-BUDAT sy-vline 
WA_FKKOPW_NC_STR-AUGDT sy-vline 
WA_FKKOPW_NC_STR-AUGBL sy-vline 
WA_FKKOPW_NC_STR-AUGBD sy-vline 
WA_FKKOPW_NC_STR-AUGRD sy-vline 
WA_FKKOPW_NC_STR-AUGVD sy-vline 
WA_FKKOPW_NC_STR-AUGOB sy-vline 
WA_FKKOPW_NC_STR-XAUFL sy-vline 
WA_FKKOPW_NC_STR-XRAGL sy-vline      INTO ld_text SEPARATED BY SPACE.

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