ABAP Select data from SAP table P2KR_KRTAX into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2KR_KRTAX 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 P2KR_KRTAX. 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 P2KR_KRTAX 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_P2KR_KRTAX TYPE STANDARD TABLE OF P2KR_KRTAX,
      WA_P2KR_KRTAX TYPE P2KR_KRTAX,
      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: <P2KR_KRTAX> TYPE P2KR_KRTAX.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2KR_KRTAX.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2KR_KRTAX
  INTO TABLE IT_P2KR_KRTAX.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2KR_KRTAX
*  INTO TABLE @DATA(IT_P2KR_KRTAX2).
*--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_P2KR_KRTAX INDEX 1 INTO DATA(WA_P2KR_KRTAX2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2KR_KRTAX ASSIGNING <P2KR_KRTAX>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2KR_KRTAX>-MANDT = 1.
<P2KR_KRTAX>-DCT_PERNR = 1.
<P2KR_KRTAX>-DCT_SEQNR = 1.
<P2KR_KRTAX>-DCT_ROWID = 1.
<P2KR_KRTAX>-CNTR2 = 1.

ENDLOOP.

LOOP AT IT_P2KR_KRTAX INTO WA_P2KR_KRTAX.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2KR_KRTAX-BEGDA, sy-vline,
  WA_P2KR_KRTAX-ENDDA, sy-vline,
  WA_P2KR_KRTAX-BUPLA, sy-vline,
  WA_P2KR_KRTAX-SECCO, sy-vline,
  WA_P2KR_KRTAX-INFTY, sy-vline,
  WA_P2KR_KRTAX-SUBTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2KR_KRTAX 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_P2KR_KRTAX 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_P2KR_KRTAX INTO WA_P2KR_KRTAX.


*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_P2KR_KRTAX_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
CNTR2 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
BUPLA TYPE STRING,
SECCO TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
NTXFC TYPE STRING,
FRYEA TYPE STRING,
RSNOT TYPE STRING,
FLDEG TYPE STRING,
REFID TYPE STRING,
OLDEE TYPE STRING,
HNDEE TYPE STRING,
WOMEE TYPE STRING,
DPTID TYPE STRING,
LIVID TYPE STRING,
OLDID TYPE STRING,
HNDID TYPE STRING,
CHDID TYPE STRING,
DPOLD TYPE STRING,
DPYNG TYPE STRING,
DPTOT TYPE STRING,
PRODU TYPE STRING,
OLDII TYPE STRING,
OPTIO TYPE STRING,
INSID TYPE STRING,
MEDID TYPE STRING,
EDUID TYPE STRING,
CREID TYPE STRING,
BACHD TYPE STRING,
OAPID TYPE STRING,
FSTID TYPE STRING,
FRNMN TYPE STRING,
YNGEE TYPE STRING,
SIGPR TYPE STRING,
DPTYP TYPE STRING,
DSPCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2KR_KRTAX_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_P2KR_KRTAX_STR-MANDT sy-vline 
WA_P2KR_KRTAX_STR-DCT_PERNR sy-vline 
WA_P2KR_KRTAX_STR-DCT_SEQNR sy-vline 
WA_P2KR_KRTAX_STR-DCT_ROWID sy-vline 
WA_P2KR_KRTAX_STR-CNTR2 sy-vline 
WA_P2KR_KRTAX_STR-BEGDA sy-vline 
WA_P2KR_KRTAX_STR-ENDDA sy-vline 
WA_P2KR_KRTAX_STR-BUPLA sy-vline 
WA_P2KR_KRTAX_STR-SECCO sy-vline 
WA_P2KR_KRTAX_STR-INFTY sy-vline 
WA_P2KR_KRTAX_STR-SUBTY sy-vline 
WA_P2KR_KRTAX_STR-OBJPS sy-vline 
WA_P2KR_KRTAX_STR-NTXFC sy-vline 
WA_P2KR_KRTAX_STR-FRYEA sy-vline 
WA_P2KR_KRTAX_STR-RSNOT sy-vline 
WA_P2KR_KRTAX_STR-FLDEG sy-vline 
WA_P2KR_KRTAX_STR-REFID sy-vline 
WA_P2KR_KRTAX_STR-OLDEE sy-vline 
WA_P2KR_KRTAX_STR-HNDEE sy-vline 
WA_P2KR_KRTAX_STR-WOMEE sy-vline 
WA_P2KR_KRTAX_STR-DPTID sy-vline 
WA_P2KR_KRTAX_STR-LIVID sy-vline 
WA_P2KR_KRTAX_STR-OLDID sy-vline 
WA_P2KR_KRTAX_STR-HNDID sy-vline 
WA_P2KR_KRTAX_STR-CHDID sy-vline 
WA_P2KR_KRTAX_STR-DPOLD sy-vline 
WA_P2KR_KRTAX_STR-DPYNG sy-vline 
WA_P2KR_KRTAX_STR-DPTOT sy-vline 
WA_P2KR_KRTAX_STR-PRODU sy-vline 
WA_P2KR_KRTAX_STR-OLDII sy-vline 
WA_P2KR_KRTAX_STR-OPTIO sy-vline 
WA_P2KR_KRTAX_STR-INSID sy-vline 
WA_P2KR_KRTAX_STR-MEDID sy-vline 
WA_P2KR_KRTAX_STR-EDUID sy-vline 
WA_P2KR_KRTAX_STR-CREID sy-vline 
WA_P2KR_KRTAX_STR-BACHD sy-vline 
WA_P2KR_KRTAX_STR-OAPID sy-vline 
WA_P2KR_KRTAX_STR-FSTID sy-vline 
WA_P2KR_KRTAX_STR-FRNMN sy-vline 
WA_P2KR_KRTAX_STR-YNGEE sy-vline 
WA_P2KR_KRTAX_STR-SIGPR sy-vline 
WA_P2KR_KRTAX_STR-DPTYP sy-vline 
WA_P2KR_KRTAX_STR-DSPCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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