ABAP Select data from SAP table DFKKPDC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKPDC
*  INTO TABLE @DATA(IT_DFKKPDC2).
*--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_DFKKPDC INDEX 1 INTO DATA(WA_DFKKPDC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKPDC>-MANDT = 1.
<DFKKPDC>-PGUID = 1.
<DFKKPDC>-CHCKN = 1.
<DFKKPDC>-PSTAT = 1.
<DFKKPDC>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKPDC-ISDAT, sy-vline,
  WA_DFKKPDC-CPUDT, sy-vline,
  WA_DFKKPDC-CPUTM, sy-vline,
  WA_DFKKPDC-ERNAM, sy-vline,
  WA_DFKKPDC-AENAM, sy-vline,
  WA_DFKKPDC-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKPDC 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_DFKKPDC 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_DFKKPDC INTO WA_DFKKPDC.


*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 BVRKO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKPDC-BVRKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKPDC-BVRKO.
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_DFKKPDC_STR, 
MANDT TYPE STRING,
PGUID TYPE STRING,
CHCKN TYPE STRING,
PSTAT TYPE STRING,
BUKRS TYPE STRING,
ISDAT TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
ERNAM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
KEYZ1 TYPE STRING,
POSZA TYPE STRING,
BETRZ TYPE STRING,
WAERS TYPE STRING,
XVERS TYPE STRING,
VOIDR TYPE STRING,
SDATE TYPE STRING,
OPBEL TYPE STRING,
OPUPK TYPE STRING,
BVRKO TYPE STRING,
LNUMM TYPE STRING,
XERRL TYPE STRING,
KUKON TYPE STRING,
EXREF TYPE STRING,
TRREF TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKPDC_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_DFKKPDC_STR-MANDT sy-vline 
WA_DFKKPDC_STR-PGUID sy-vline 
WA_DFKKPDC_STR-CHCKN sy-vline 
WA_DFKKPDC_STR-PSTAT sy-vline 
WA_DFKKPDC_STR-BUKRS sy-vline 
WA_DFKKPDC_STR-ISDAT sy-vline 
WA_DFKKPDC_STR-CPUDT sy-vline 
WA_DFKKPDC_STR-CPUTM sy-vline 
WA_DFKKPDC_STR-ERNAM sy-vline 
WA_DFKKPDC_STR-AENAM sy-vline 
WA_DFKKPDC_STR-AEDAT sy-vline 
WA_DFKKPDC_STR-AETIM sy-vline 
WA_DFKKPDC_STR-KEYZ1 sy-vline 
WA_DFKKPDC_STR-POSZA sy-vline 
WA_DFKKPDC_STR-BETRZ sy-vline 
WA_DFKKPDC_STR-WAERS sy-vline 
WA_DFKKPDC_STR-XVERS sy-vline 
WA_DFKKPDC_STR-VOIDR sy-vline 
WA_DFKKPDC_STR-SDATE sy-vline 
WA_DFKKPDC_STR-OPBEL sy-vline 
WA_DFKKPDC_STR-OPUPK sy-vline 
WA_DFKKPDC_STR-BVRKO sy-vline 
WA_DFKKPDC_STR-LNUMM sy-vline 
WA_DFKKPDC_STR-XERRL sy-vline 
WA_DFKKPDC_STR-KUKON sy-vline 
WA_DFKKPDC_STR-EXREF sy-vline 
WA_DFKKPDC_STR-TRREF sy-vline 
WA_DFKKPDC_STR-LAUFD sy-vline 
WA_DFKKPDC_STR-LAUFI sy-vline      INTO ld_text SEPARATED BY SPACE.

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