ABAP Select data from SAP table FKKOPUSTAXOUTDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKOPUSTAXOUTDATA
*  INTO TABLE @DATA(IT_FKKOPUSTAXOUTDATA2).
*--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_FKKOPUSTAXOUTDATA INDEX 1 INTO DATA(WA_FKKOPUSTAXOUTDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKOPUSTAXOUTDATA>-OPK_OPUPK = 1.
<FKKOPUSTAXOUTDATA>-PCODE = 1.
<FKKOPUSTAXOUTDATA>-TXTYP = 1.
<FKKOPUSTAXOUTDATA>-TXCNT = 1.
<FKKOPUSTAXOUTDATA>-CALCT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKOPUSTAXOUTDATA-TXRAT, sy-vline,
  WA_FKKOPUSTAXOUTDATA-TXAMT, sy-vline,
  WA_FKKOPUSTAXOUTDATA-TMAMT, sy-vline,
  WA_FKKOPUSTAXOUTDATA-EXAMT, sy-vline,
  WA_FKKOPUSTAXOUTDATA-BILAB, sy-vline,
  WA_FKKOPUSTAXOUTDATA-COMPL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKOPUSTAXOUTDATA 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_FKKOPUSTAXOUTDATA 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_FKKOPUSTAXOUTDATA INTO WA_FKKOPUSTAXOUTDATA.


*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_FKKOPUSTAXOUTDATA_STR, 
OPK_OPUPK TYPE STRING,
PCODE TYPE STRING,
TXTYP TYPE STRING,
TXCNT TYPE STRING,
CALCT TYPE STRING,
TXRAT TYPE STRING,
TXAMT TYPE STRING,
TMAMT TYPE STRING,
EXAMT TYPE STRING,
BILAB TYPE STRING,
COMPL TYPE STRING,
SURCH TYPE STRING,
RFAMT TYPE STRING,
ADJME TYPE STRING,
EXTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKOPUSTAXOUTDATA_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_FKKOPUSTAXOUTDATA_STR-OPK_OPUPK sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-PCODE sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-TXTYP sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-TXCNT sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-CALCT sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-TXRAT sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-TXAMT sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-TMAMT sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-EXAMT sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-BILAB sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-COMPL sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-SURCH sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-RFAMT sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-ADJME sy-vline 
WA_FKKOPUSTAXOUTDATA_STR-EXTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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