ABAP Select data from SAP table FKKWH_WHGRP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKWH_WHGRP
*  INTO TABLE @DATA(IT_FKKWH_WHGRP2).
*--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_FKKWH_WHGRP INDEX 1 INTO DATA(WA_FKKWH_WHGRP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKWH_WHGRP>-MERKIFKKOP = 1.
<FKKWH_WHGRP>-MERKIFKKOPW = 1.
<FKKWH_WHGRP>-MERKIFKKKO = 1.
<FKKWH_WHGRP>-MERKLOGFKKOP = 1.
<FKKWH_WHGRP>-TFIFKKOP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKWH_WHGRP-MODIFKKOP, sy-vline,
  WA_FKKWH_WHGRP-SUBIFKKOP, sy-vline,
  WA_FKKWH_WHGRP-ADDIFKKOP, sy-vline,
  WA_FKKWH_WHGRP-MERKITYPE, sy-vline,
  WA_FKKWH_WHGRP-MERKILOCKTAB, sy-vline,
  WA_FKKWH_WHGRP-SAMPLE_LOCKS_EXIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKWH_WHGRP 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_FKKWH_WHGRP 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_FKKWH_WHGRP INTO WA_FKKWH_WHGRP.


*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_FKKWH_WHGRP_STR, 
MERKIFKKOP TYPE STRING,
MERKIFKKOPW TYPE STRING,
MERKIFKKKO TYPE STRING,
MERKLOGFKKOP TYPE STRING,
TFIFKKOP TYPE STRING,
MODIFKKOP TYPE STRING,
SUBIFKKOP TYPE STRING,
ADDIFKKOP TYPE STRING,
MERKITYPE TYPE STRING,
MERKILOCKTAB TYPE STRING,
SAMPLE_LOCKS_EXIST TYPE STRING,
SAMPLE_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKWH_WHGRP_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_FKKWH_WHGRP_STR-MERKIFKKOP sy-vline 
WA_FKKWH_WHGRP_STR-MERKIFKKOPW sy-vline 
WA_FKKWH_WHGRP_STR-MERKIFKKKO sy-vline 
WA_FKKWH_WHGRP_STR-MERKLOGFKKOP sy-vline 
WA_FKKWH_WHGRP_STR-TFIFKKOP sy-vline 
WA_FKKWH_WHGRP_STR-MODIFKKOP sy-vline 
WA_FKKWH_WHGRP_STR-SUBIFKKOP sy-vline 
WA_FKKWH_WHGRP_STR-ADDIFKKOP sy-vline 
WA_FKKWH_WHGRP_STR-MERKITYPE sy-vline 
WA_FKKWH_WHGRP_STR-MERKILOCKTAB sy-vline 
WA_FKKWH_WHGRP_STR-SAMPLE_LOCKS_EXIST sy-vline 
WA_FKKWH_WHGRP_STR-SAMPLE_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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