ABAP Select data from SAP table RFKKPOP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKKPOP
*  INTO TABLE @DATA(IT_RFKKPOP2).
*--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_RFKKPOP INDEX 1 INTO DATA(WA_RFKKPOP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKKPOP>-MANDT = 1.
<RFKKPOP>-PYORD = 1.
<RFKKPOP>-POSPO = 1.
<RFKKPOP>-DOC2T = 1.
<RFKKPOP>-DOC2R = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKKPOP-GPA2T, sy-vline,
  WA_RFKKPOP-GPA2R, sy-vline,
  WA_RFKKPOP-ACC1T, sy-vline,
  WA_RFKKPOP-ACC1R, sy-vline,
  WA_RFKKPOP-ORG2T, sy-vline,
  WA_RFKKPOP-ORG2R, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKKPOP 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_RFKKPOP 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_RFKKPOP INTO WA_RFKKPOP.


*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 PYORD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKKPOP-PYORD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKKPOP-PYORD.
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_RFKKPOP_STR, 
MANDT TYPE STRING,
PYORD TYPE STRING,
POSPO TYPE STRING,
DOC2T TYPE STRING,
DOC2R TYPE STRING,
GPA2T TYPE STRING,
GPA2R TYPE STRING,
ACC1T TYPE STRING,
ACC1R TYPE STRING,
ORG2T TYPE STRING,
ORG2R TYPE STRING,
WAERS TYPE STRING,
AUGBW TYPE STRING,
ASKTW TYPE STRING,
AQSBW TYPE STRING,
QSSKZ TYPE STRING,
WHGRP TYPE STRING,
AUGBH TYPE STRING,
ASKTH TYPE STRING,
AQSBH TYPE STRING,
ORIBT TYPE STRING,
ORIWA TYPE STRING,
XWHPO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKKPOP_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_RFKKPOP_STR-MANDT sy-vline 
WA_RFKKPOP_STR-PYORD sy-vline 
WA_RFKKPOP_STR-POSPO sy-vline 
WA_RFKKPOP_STR-DOC2T sy-vline 
WA_RFKKPOP_STR-DOC2R sy-vline 
WA_RFKKPOP_STR-GPA2T sy-vline 
WA_RFKKPOP_STR-GPA2R sy-vline 
WA_RFKKPOP_STR-ACC1T sy-vline 
WA_RFKKPOP_STR-ACC1R sy-vline 
WA_RFKKPOP_STR-ORG2T sy-vline 
WA_RFKKPOP_STR-ORG2R sy-vline 
WA_RFKKPOP_STR-WAERS sy-vline 
WA_RFKKPOP_STR-AUGBW sy-vline 
WA_RFKKPOP_STR-ASKTW sy-vline 
WA_RFKKPOP_STR-AQSBW sy-vline 
WA_RFKKPOP_STR-QSSKZ sy-vline 
WA_RFKKPOP_STR-WHGRP sy-vline 
WA_RFKKPOP_STR-AUGBH sy-vline 
WA_RFKKPOP_STR-ASKTH sy-vline 
WA_RFKKPOP_STR-AQSBH sy-vline 
WA_RFKKPOP_STR-ORIBT sy-vline 
WA_RFKKPOP_STR-ORIWA sy-vline 
WA_RFKKPOP_STR-XWHPO sy-vline      INTO ld_text SEPARATED BY SPACE.

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