ABAP Select data from SAP table FKKRTP_POSTDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKRTP_POSTDATA
*  INTO TABLE @DATA(IT_FKKRTP_POSTDATA2).
*--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_FKKRTP_POSTDATA INDEX 1 INTO DATA(WA_FKKRTP_POSTDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKRTP_POSTDATA>-PYBUK = 1.
<FKKRTP_POSTDATA>-GPART = 1.
<FKKRTP_POSTDATA>-VKONV = 1.
<FKKRTP_POSTDATA>-BKVID = 1.
<FKKRTP_POSTDATA>-HBKID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKRTP_POSTDATA-HKTID, sy-vline,
  WA_FKKRTP_POSTDATA-ZLSCH, sy-vline,
  WA_FKKRTP_POSTDATA-WAERS, sy-vline,
  WA_FKKRTP_POSTDATA-PAYID, sy-vline,
  WA_FKKRTP_POSTDATA-PAYTP, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_FKKRTP_POSTDATA 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_FKKRTP_POSTDATA 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_FKKRTP_POSTDATA INTO WA_FKKRTP_POSTDATA.


*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 GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKRTP_POSTDATA-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKRTP_POSTDATA-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKRTP_POSTDATA-VKONV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKRTP_POSTDATA-VKONV.
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_FKKRTP_POSTDATA_STR, 
PYBUK TYPE STRING,
GPART TYPE STRING,
VKONV TYPE STRING,
BKVID TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
ZLSCH TYPE STRING,
WAERS TYPE STRING,
PAYID TYPE STRING,
PAYTP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKRTP_POSTDATA_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_FKKRTP_POSTDATA_STR-PYBUK sy-vline 
WA_FKKRTP_POSTDATA_STR-GPART sy-vline 
WA_FKKRTP_POSTDATA_STR-VKONV sy-vline 
WA_FKKRTP_POSTDATA_STR-BKVID sy-vline 
WA_FKKRTP_POSTDATA_STR-HBKID sy-vline 
WA_FKKRTP_POSTDATA_STR-HKTID sy-vline 
WA_FKKRTP_POSTDATA_STR-ZLSCH sy-vline 
WA_FKKRTP_POSTDATA_STR-WAERS sy-vline 
WA_FKKRTP_POSTDATA_STR-PAYID sy-vline 
WA_FKKRTP_POSTDATA_STR-PAYTP sy-vline      INTO ld_text SEPARATED BY SPACE.

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