ABAP Select data from SAP table KCD_FDUSTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KCD_FDUSTR
*  INTO TABLE @DATA(IT_KCD_FDUSTR2).
*--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_KCD_FDUSTR INDEX 1 INTO DATA(WA_KCD_FDUSTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KCD_FDUSTR>-KCWARN = 1.
<KCD_FDUSTR>-KCINFO = 1.
<KCD_FDUSTR>-KCFORM = 1.
<KCD_FDUSTR>-KCPROTSIZE = 1.
<KCD_FDUSTR>-KCBLKSIZE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KCD_FDUSTR-KCVALUE, sy-vline,
  WA_KCD_FDUSTR-KCMARK, sy-vline,
  WA_KCD_FDUSTR-KCBLOCK, sy-vline,
  WA_KCD_FDUSTR-KCSTRU, sy-vline,
  WA_KCD_FDUSTR-KCLIGHT, sy-vline,
  WA_KCD_FDUSTR-KCAENDB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KCD_FDUSTR 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_KCD_FDUSTR 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_KCD_FDUSTR INTO WA_KCD_FDUSTR.


*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_KCD_FDUSTR_STR, 
KCWARN TYPE STRING,
KCINFO TYPE STRING,
KCFORM TYPE STRING,
KCPROTSIZE TYPE STRING,
KCBLKSIZE TYPE STRING,
KCVALUE TYPE STRING,
KCMARK TYPE STRING,
KCBLOCK TYPE STRING,
KCSTRU TYPE STRING,
KCLIGHT TYPE STRING,
KCAENDB TYPE STRING,
KCUPDREL TYPE STRING,
KCBIERH TYPE STRING,
KCSINGLEFR TYPE STRING,
KCCPROTNR TYPE STRING,
KCBIMAP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KCD_FDUSTR_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_KCD_FDUSTR_STR-KCWARN sy-vline 
WA_KCD_FDUSTR_STR-KCINFO sy-vline 
WA_KCD_FDUSTR_STR-KCFORM sy-vline 
WA_KCD_FDUSTR_STR-KCPROTSIZE sy-vline 
WA_KCD_FDUSTR_STR-KCBLKSIZE sy-vline 
WA_KCD_FDUSTR_STR-KCVALUE sy-vline 
WA_KCD_FDUSTR_STR-KCMARK sy-vline 
WA_KCD_FDUSTR_STR-KCBLOCK sy-vline 
WA_KCD_FDUSTR_STR-KCSTRU sy-vline 
WA_KCD_FDUSTR_STR-KCLIGHT sy-vline 
WA_KCD_FDUSTR_STR-KCAENDB sy-vline 
WA_KCD_FDUSTR_STR-KCUPDREL sy-vline 
WA_KCD_FDUSTR_STR-KCBIERH sy-vline 
WA_KCD_FDUSTR_STR-KCSINGLEFR sy-vline 
WA_KCD_FDUSTR_STR-KCCPROTNR sy-vline 
WA_KCD_FDUSTR_STR-KCBIMAP sy-vline      INTO ld_text SEPARATED BY SPACE.

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