ABAP Select data from SAP table KPP0D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KPP0D 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 KPP0D. 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 KPP0D 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_KPP0D TYPE STANDARD TABLE OF KPP0D,
      WA_KPP0D TYPE KPP0D,
      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: <KPP0D> TYPE KPP0D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KPP0D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KPP0D
  INTO TABLE IT_KPP0D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPP0D
*  INTO TABLE @DATA(IT_KPP0D2).
*--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_KPP0D INDEX 1 INTO DATA(WA_KPP0D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KPP0D ASSIGNING <KPP0D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPP0D>-FIELDNAME = 1.
<KPP0D>-TABNAME = 1.
<KPP0D>-DTYPE = 1.
<KPP0D>-DOBLI = 1.
<KPP0D>-DSHOW = 1.

ENDLOOP.

LOOP AT IT_KPP0D INTO WA_KPP0D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPP0D-DINIT, sy-vline,
  WA_KPP0D-DMAC, sy-vline,
  WA_KPP0D-F4PR, sy-vline,
  WA_KPP0D-F4FM, sy-vline,
  WA_KPP0D-B_MEMORYID, sy-vline,
  WA_KPP0D-COMPL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPP0D 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_KPP0D 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_KPP0D INTO WA_KPP0D.


*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_KPP0D_STR, 
FIELDNAME TYPE STRING,
TABNAME TYPE STRING,
DTYPE TYPE STRING,
DOBLI TYPE STRING,
DSHOW TYPE STRING,
DINIT TYPE STRING,
DMAC TYPE STRING,
F4PR TYPE STRING,
F4FM TYPE STRING,
B_MEMORYID TYPE STRING,
COMPL TYPE STRING,
SORT TYPE STRING,
DDDRI TYPE STRING,
SETUSE TYPE STRING,
RATIO TYPE STRING,
HDPOS TYPE STRING,
LEVEL TYPE STRING,
MOMENT TYPE STRING,
VALUE TYPE STRING,
INIT TYPE STRING,
HEAD_ROW TYPE STRING,
SUM_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPP0D_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_KPP0D_STR-FIELDNAME sy-vline 
WA_KPP0D_STR-TABNAME sy-vline 
WA_KPP0D_STR-DTYPE sy-vline 
WA_KPP0D_STR-DOBLI sy-vline 
WA_KPP0D_STR-DSHOW sy-vline 
WA_KPP0D_STR-DINIT sy-vline 
WA_KPP0D_STR-DMAC sy-vline 
WA_KPP0D_STR-F4PR sy-vline 
WA_KPP0D_STR-F4FM sy-vline 
WA_KPP0D_STR-B_MEMORYID sy-vline 
WA_KPP0D_STR-COMPL sy-vline 
WA_KPP0D_STR-SORT sy-vline 
WA_KPP0D_STR-DDDRI sy-vline 
WA_KPP0D_STR-SETUSE sy-vline 
WA_KPP0D_STR-RATIO sy-vline 
WA_KPP0D_STR-HDPOS sy-vline 
WA_KPP0D_STR-LEVEL sy-vline 
WA_KPP0D_STR-MOMENT sy-vline 
WA_KPP0D_STR-VALUE sy-vline 
WA_KPP0D_STR-INIT sy-vline 
WA_KPP0D_STR-HEAD_ROW sy-vline 
WA_KPP0D_STR-SUM_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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