ABAP Select data from SAP table DFKKZS into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKZS
*  INTO TABLE @DATA(IT_DFKKZS2).
*--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_DFKKZS INDEX 1 INTO DATA(WA_DFKKZS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKZS>-MANDT = 1.
<DFKKZS>-KEYZ1 = 1.
<DFKKZS>-UPOSZ = 1.
<DFKKZS>-LFDSL = 1.
<DFKKZS>-SELT1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKZS-SELW1, sy-vline,
  WA_DFKKZS-SELT2, sy-vline,
  WA_DFKKZS-SELW2, sy-vline,
  WA_DFKKZS-SELT3, sy-vline,
  WA_DFKKZS-SELW3, sy-vline,
  WA_DFKKZS-TBETR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKZS 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_DFKKZS 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_DFKKZS INTO WA_DFKKZS.


*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_DFKKZS_STR, 
MANDT TYPE STRING,
KEYZ1 TYPE STRING,
UPOSZ TYPE STRING,
LFDSL TYPE STRING,
SELT1 TYPE STRING,
SELW1 TYPE STRING,
SELT2 TYPE STRING,
SELW2 TYPE STRING,
SELT3 TYPE STRING,
SELW3 TYPE STRING,
TBETR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKZS_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_DFKKZS_STR-MANDT sy-vline 
WA_DFKKZS_STR-KEYZ1 sy-vline 
WA_DFKKZS_STR-UPOSZ sy-vline 
WA_DFKKZS_STR-LFDSL sy-vline 
WA_DFKKZS_STR-SELT1 sy-vline 
WA_DFKKZS_STR-SELW1 sy-vline 
WA_DFKKZS_STR-SELT2 sy-vline 
WA_DFKKZS_STR-SELW2 sy-vline 
WA_DFKKZS_STR-SELT3 sy-vline 
WA_DFKKZS_STR-SELW3 sy-vline 
WA_DFKKZS_STR-TBETR sy-vline      INTO ld_text SEPARATED BY SPACE.

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