ABAP Select data from SAP table V1_FKKOPW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V1_FKKOPW 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 V1_FKKOPW. 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 V1_FKKOPW 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_V1_FKKOPW TYPE STANDARD TABLE OF V1_FKKOPW,
      WA_V1_FKKOPW TYPE V1_FKKOPW,
      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: <V1_FKKOPW> TYPE V1_FKKOPW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V1_FKKOPW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V1_FKKOPW
  INTO TABLE IT_V1_FKKOPW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V1_FKKOPW
*  INTO TABLE @DATA(IT_V1_FKKOPW2).
*--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_V1_FKKOPW INDEX 1 INTO DATA(WA_V1_FKKOPW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V1_FKKOPW ASSIGNING <V1_FKKOPW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V1_FKKOPW>-MANDT = 1.
<V1_FKKOPW>-OPBEL = 1.
<V1_FKKOPW>-WHGRP = 1.
<V1_FKKOPW>-OPUPW = 1.
<V1_FKKOPW>-AUGDT = 1.

ENDLOOP.

LOOP AT IT_V1_FKKOPW INTO WA_V1_FKKOPW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V1_FKKOPW-AUGBL, sy-vline,
  WA_V1_FKKOPW-AUGBD, sy-vline,
  WA_V1_FKKOPW-AUGRD, sy-vline,
  WA_V1_FKKOPW-AUGVD, sy-vline,
  WA_V1_FKKOPW-AUGOB, sy-vline,
  WA_V1_FKKOPW-XAUFL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V1_FKKOPW 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_V1_FKKOPW 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_V1_FKKOPW INTO WA_V1_FKKOPW.


*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 OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1_FKKOPW-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1_FKKOPW-OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1_FKKOPW-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1_FKKOPW-AUGBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PNNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1_FKKOPW-PNNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1_FKKOPW-PNNUM.
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_V1_FKKOPW_STR, 
MANDT TYPE STRING,
OPBEL TYPE STRING,
WHGRP TYPE STRING,
OPUPW 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,
XPYOR TYPE STRING,
PNNUM TYPE STRING,
PNHKF TYPE STRING,
PNEXD TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V1_FKKOPW_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_V1_FKKOPW_STR-MANDT sy-vline 
WA_V1_FKKOPW_STR-OPBEL sy-vline 
WA_V1_FKKOPW_STR-WHGRP sy-vline 
WA_V1_FKKOPW_STR-OPUPW sy-vline 
WA_V1_FKKOPW_STR-AUGDT sy-vline 
WA_V1_FKKOPW_STR-AUGBL sy-vline 
WA_V1_FKKOPW_STR-AUGBD sy-vline 
WA_V1_FKKOPW_STR-AUGRD sy-vline 
WA_V1_FKKOPW_STR-AUGVD sy-vline 
WA_V1_FKKOPW_STR-AUGOB sy-vline 
WA_V1_FKKOPW_STR-XAUFL sy-vline 
WA_V1_FKKOPW_STR-XRAGL sy-vline 
WA_V1_FKKOPW_STR-XPYOR sy-vline 
WA_V1_FKKOPW_STR-PNNUM sy-vline 
WA_V1_FKKOPW_STR-PNHKF sy-vline 
WA_V1_FKKOPW_STR-PNEXD sy-vline 
WA_V1_FKKOPW_STR-_DATAAGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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