ABAP Select data from SAP table RFKP2P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFKP2P 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 RFKP2P. 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 RFKP2P 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_RFKP2P TYPE STANDARD TABLE OF RFKP2P,
      WA_RFKP2P TYPE RFKP2P,
      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: <RFKP2P> TYPE RFKP2P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFKP2P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFKP2P
  INTO TABLE IT_RFKP2P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKP2P
*  INTO TABLE @DATA(IT_RFKP2P2).
*--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_RFKP2P INDEX 1 INTO DATA(WA_RFKP2P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFKP2P ASSIGNING <RFKP2P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKP2P>-GPART = 1.
<RFKP2P>-VKONT_SEL = 1.
<RFKP2P>-VTREF_SEL = 1.
<RFKP2P>-BUKRS_SEL = 1.
<RFKP2P>-FAEDN_SEL = 1.

ENDLOOP.

LOOP AT IT_RFKP2P INTO WA_RFKP2P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKP2P-WAERS_SEL, sy-vline,
  WA_RFKP2P-BUKRS, sy-vline,
  WA_RFKP2P-PRCUR, sy-vline,
  WA_RFKP2P-PPRSC, sy-vline,
  WA_RFKP2P-PPRSW, sy-vline,
  WA_RFKP2P-PPSTA_WD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKP2P 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_RFKP2P 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_RFKP2P INTO WA_RFKP2P.


*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_RFKP2P-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKP2P-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT_SEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKP2P-VKONT_SEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKP2P-VKONT_SEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF_SEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKP2P-VTREF_SEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKP2P-VTREF_SEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRGPA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKP2P-PRGPA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKP2P-PRGPA.
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_RFKP2P_STR, 
GPART TYPE STRING,
VKONT_SEL TYPE STRING,
VTREF_SEL TYPE STRING,
BUKRS_SEL TYPE STRING,
FAEDN_SEL TYPE STRING,
WAERS_SEL TYPE STRING,
BUKRS TYPE STRING,
PRCUR TYPE STRING,
PPRSC TYPE STRING,
PPRSW TYPE STRING,
PPSTA_WD TYPE STRING,
BUKRS_NEW TYPE STRING,
PRAMT_REC TYPE STRING,
PRAMT_INT TYPE STRING,
PRAMT_CHR TYPE STRING,
PRAMT_TOT TYPE STRING,
RNDTO TYPE STRING,
FPAYD TYPE STRING,
DISMO TYPE STRING,
NOPDT TYPE STRING,
MXPAM TYPE STRING,
PRCUR_MAX TYPE STRING,
XCONF TYPE STRING,
PPCAT TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
FIKEY TYPE STRING,
PPSTA_NEW TYPE STRING,
DEGFF_NEW TYPE STRING,
COMMT TYPE STRING,
CICON TYPE STRING,
COMM0 TYPE STRING,
COMM1 TYPE STRING,
COMM2 TYPE STRING,
NALLO TYPE STRING,
XINDR TYPE STRING,
GPDAT TYPE STRING,
MNDID TYPE STRING,
PRGPA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKP2P_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_RFKP2P_STR-GPART sy-vline 
WA_RFKP2P_STR-VKONT_SEL sy-vline 
WA_RFKP2P_STR-VTREF_SEL sy-vline 
WA_RFKP2P_STR-BUKRS_SEL sy-vline 
WA_RFKP2P_STR-FAEDN_SEL sy-vline 
WA_RFKP2P_STR-WAERS_SEL sy-vline 
WA_RFKP2P_STR-BUKRS sy-vline 
WA_RFKP2P_STR-PRCUR sy-vline 
WA_RFKP2P_STR-PPRSC sy-vline 
WA_RFKP2P_STR-PPRSW sy-vline 
WA_RFKP2P_STR-PPSTA_WD sy-vline 
WA_RFKP2P_STR-BUKRS_NEW sy-vline 
WA_RFKP2P_STR-PRAMT_REC sy-vline 
WA_RFKP2P_STR-PRAMT_INT sy-vline 
WA_RFKP2P_STR-PRAMT_CHR sy-vline 
WA_RFKP2P_STR-PRAMT_TOT sy-vline 
WA_RFKP2P_STR-RNDTO sy-vline 
WA_RFKP2P_STR-FPAYD sy-vline 
WA_RFKP2P_STR-DISMO sy-vline 
WA_RFKP2P_STR-NOPDT sy-vline 
WA_RFKP2P_STR-MXPAM sy-vline 
WA_RFKP2P_STR-PRCUR_MAX sy-vline 
WA_RFKP2P_STR-XCONF sy-vline 
WA_RFKP2P_STR-PPCAT sy-vline 
WA_RFKP2P_STR-BUDAT sy-vline 
WA_RFKP2P_STR-BLDAT sy-vline 
WA_RFKP2P_STR-FIKEY sy-vline 
WA_RFKP2P_STR-PPSTA_NEW sy-vline 
WA_RFKP2P_STR-DEGFF_NEW sy-vline 
WA_RFKP2P_STR-COMMT sy-vline 
WA_RFKP2P_STR-CICON sy-vline 
WA_RFKP2P_STR-COMM0 sy-vline 
WA_RFKP2P_STR-COMM1 sy-vline 
WA_RFKP2P_STR-COMM2 sy-vline 
WA_RFKP2P_STR-NALLO sy-vline 
WA_RFKP2P_STR-XINDR sy-vline 
WA_RFKP2P_STR-GPDAT sy-vline 
WA_RFKP2P_STR-MNDID sy-vline 
WA_RFKP2P_STR-PRGPA sy-vline      INTO ld_text SEPARATED BY SPACE.

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