ABAP Select data from SAP table P01D3_DSKK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01D3_DSKK 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 P01D3_DSKK. 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 P01D3_DSKK 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_P01D3_DSKK TYPE STANDARD TABLE OF P01D3_DSKK,
      WA_P01D3_DSKK TYPE P01D3_DSKK,
      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: <P01D3_DSKK> TYPE P01D3_DSKK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01D3_DSKK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01D3_DSKK
  INTO TABLE IT_P01D3_DSKK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01D3_DSKK
*  INTO TABLE @DATA(IT_P01D3_DSKK2).
*--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_P01D3_DSKK INDEX 1 INTO DATA(WA_P01D3_DSKK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01D3_DSKK ASSIGNING <P01D3_DSKK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01D3_DSKK>-MANDT = 1.
<P01D3_DSKK>-GUID = 1.
<P01D3_DSKK>-VF = 1.
<P01D3_DSKK>-BBNRAB = 1.
<P01D3_DSKK>-BBNREP = 1.

ENDLOOP.

LOOP AT IT_P01D3_DSKK INTO WA_P01D3_DSKK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01D3_DSKK-VERNR, sy-vline,
  WA_P01D3_DSKK-ED, sy-vline,
  WA_P01D3_DSKK-FEKZ, sy-vline,
  WA_P01D3_DSKK-FEAN, sy-vline,
  WA_P01D3_DSKK-VSNR, sy-vline,
  WA_P01D3_DSKK-MG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01D3_DSKK 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_P01D3_DSKK 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_P01D3_DSKK INTO WA_P01D3_DSKK.


*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_P01D3_DSKK_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
VF TYPE STRING,
BBNRAB TYPE STRING,
BBNREP TYPE STRING,
VERNR TYPE STRING,
ED TYPE STRING,
FEKZ TYPE STRING,
FEAN TYPE STRING,
VSNR TYPE STRING,
MG TYPE STRING,
AZKK TYPE STRING,
BBNRAG TYPE STRING,
AZAG TYPE STRING,
BBNRAS TYPE STRING,
GD TYPE STRING,
MMMM TYPE STRING,
MMMS TYPE STRING,
MMGZ TYPE STRING,
MMBG TYPE STRING,
MMNA TYPE STRING,
MMGB TYPE STRING,
MMAN TYPE STRING,
MMMB TYPE STRING,
MMAM TYPE STRING,
DSID TYPE STRING,
DSID_UR TYPE STRING,
VOID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01D3_DSKK_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_P01D3_DSKK_STR-MANDT sy-vline 
WA_P01D3_DSKK_STR-GUID sy-vline 
WA_P01D3_DSKK_STR-VF sy-vline 
WA_P01D3_DSKK_STR-BBNRAB sy-vline 
WA_P01D3_DSKK_STR-BBNREP sy-vline 
WA_P01D3_DSKK_STR-VERNR sy-vline 
WA_P01D3_DSKK_STR-ED sy-vline 
WA_P01D3_DSKK_STR-FEKZ sy-vline 
WA_P01D3_DSKK_STR-FEAN sy-vline 
WA_P01D3_DSKK_STR-VSNR sy-vline 
WA_P01D3_DSKK_STR-MG sy-vline 
WA_P01D3_DSKK_STR-AZKK sy-vline 
WA_P01D3_DSKK_STR-BBNRAG sy-vline 
WA_P01D3_DSKK_STR-AZAG sy-vline 
WA_P01D3_DSKK_STR-BBNRAS sy-vline 
WA_P01D3_DSKK_STR-GD sy-vline 
WA_P01D3_DSKK_STR-MMMM sy-vline 
WA_P01D3_DSKK_STR-MMMS sy-vline 
WA_P01D3_DSKK_STR-MMGZ sy-vline 
WA_P01D3_DSKK_STR-MMBG sy-vline 
WA_P01D3_DSKK_STR-MMNA sy-vline 
WA_P01D3_DSKK_STR-MMGB sy-vline 
WA_P01D3_DSKK_STR-MMAN sy-vline 
WA_P01D3_DSKK_STR-MMMB sy-vline 
WA_P01D3_DSKK_STR-MMAM sy-vline 
WA_P01D3_DSKK_STR-DSID sy-vline 
WA_P01D3_DSKK_STR-DSID_UR sy-vline 
WA_P01D3_DSKK_STR-VOID sy-vline      INTO ld_text SEPARATED BY SPACE.

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