ABAP Select data from SAP table RKPLV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKPLV
*  INTO TABLE @DATA(IT_RKPLV2).
*--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_RKPLV INDEX 1 INTO DATA(WA_RKPLV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKPLV>-TPERAB = 1.
<RKPLV>-TPERBI = 1.
<RKPLV>-TKOSTL = 1.
<RKPLV>-TKSGRU = 1.
<RKPLV>-FLTKOSTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKPLV-FLTKSGRU, sy-vline,
  WA_RKPLV-FLALLKST, sy-vline,
  WA_RKPLV-FLRKOSTL, sy-vline,
  WA_RKPLV-FLRKSGRU, sy-vline,
  WA_RKPLV-FLREQT, sy-vline,
  WA_RKPLV-RKOSTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKPLV 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_RKPLV 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_RKPLV INTO WA_RKPLV.


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

*Conversion exit ALPHA, internal->external for field RKOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPLV-RKOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPLV-RKOSTL.
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_RKPLV_STR, 
TPERAB TYPE STRING,
TPERBI TYPE STRING,
TKOSTL TYPE STRING,
TKSGRU TYPE STRING,
FLTKOSTL TYPE STRING,
FLTKSGRU TYPE STRING,
FLALLKST TYPE STRING,
FLRKOSTL TYPE STRING,
FLRKSGRU TYPE STRING,
FLREQT TYPE STRING,
RKOSTL TYPE STRING,
RKSGRU TYPE STRING,
RPERAB TYPE STRING,
RPERBI TYPE STRING,
PROTO TYPE STRING,
CLTEXT TYPE STRING,
CKALK TYPE STRING,
BATCH TYPE STRING,
STRUMIT TYPE STRING,
STRUO TYPE STRING,
UPDATE TYPE STRING,
NOTUPDATE TYPE STRING,
FLRKPALL TYPE STRING,
FLRKPSEL TYPE STRING,
TESTRUN TYPE STRING,
XINIT97 TYPE STRING,
RKP1 TYPE STRING,
RKP2 TYPE STRING,
RKP3 TYPE STRING,
RKP4 TYPE STRING,
RKP5 TYPE STRING,
RKP6 TYPE STRING,
RKP7 TYPE STRING,
RKPW TYPE STRING,
RKPX TYPE STRING,
RKP2Q TYPE STRING,
RKP2P TYPE STRING,
XINIT98 TYPE STRING,
XALLPST TYPE STRING,
XSELPST TYPE STRING,
XLEI TYPE STRING,
XPRI TYPE STRING,
XERL TYPE STRING,
XILV TYPE STRING,
XAUF TYPE STRING,
XZUS TYPE STRING,
XSTA TYPE STRING,
VALUTYP TYPE STRING,
C_TWAER TYPE STRING,
C_OWAER TYPE STRING,
C_KWAER TYPE STRING,
P_OWAER TYPE STRING,
P_KWAER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKPLV_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_RKPLV_STR-TPERAB sy-vline 
WA_RKPLV_STR-TPERBI sy-vline 
WA_RKPLV_STR-TKOSTL sy-vline 
WA_RKPLV_STR-TKSGRU sy-vline 
WA_RKPLV_STR-FLTKOSTL sy-vline 
WA_RKPLV_STR-FLTKSGRU sy-vline 
WA_RKPLV_STR-FLALLKST sy-vline 
WA_RKPLV_STR-FLRKOSTL sy-vline 
WA_RKPLV_STR-FLRKSGRU sy-vline 
WA_RKPLV_STR-FLREQT sy-vline 
WA_RKPLV_STR-RKOSTL sy-vline 
WA_RKPLV_STR-RKSGRU sy-vline 
WA_RKPLV_STR-RPERAB sy-vline 
WA_RKPLV_STR-RPERBI sy-vline 
WA_RKPLV_STR-PROTO sy-vline 
WA_RKPLV_STR-CLTEXT sy-vline 
WA_RKPLV_STR-CKALK sy-vline 
WA_RKPLV_STR-BATCH sy-vline 
WA_RKPLV_STR-STRUMIT sy-vline 
WA_RKPLV_STR-STRUO sy-vline 
WA_RKPLV_STR-UPDATE sy-vline 
WA_RKPLV_STR-NOTUPDATE sy-vline 
WA_RKPLV_STR-FLRKPALL sy-vline 
WA_RKPLV_STR-FLRKPSEL sy-vline 
WA_RKPLV_STR-TESTRUN sy-vline 
WA_RKPLV_STR-XINIT97 sy-vline 
WA_RKPLV_STR-RKP1 sy-vline 
WA_RKPLV_STR-RKP2 sy-vline 
WA_RKPLV_STR-RKP3 sy-vline 
WA_RKPLV_STR-RKP4 sy-vline 
WA_RKPLV_STR-RKP5 sy-vline 
WA_RKPLV_STR-RKP6 sy-vline 
WA_RKPLV_STR-RKP7 sy-vline 
WA_RKPLV_STR-RKPW sy-vline 
WA_RKPLV_STR-RKPX sy-vline 
WA_RKPLV_STR-RKP2Q sy-vline 
WA_RKPLV_STR-RKP2P sy-vline 
WA_RKPLV_STR-XINIT98 sy-vline 
WA_RKPLV_STR-XALLPST sy-vline 
WA_RKPLV_STR-XSELPST sy-vline 
WA_RKPLV_STR-XLEI sy-vline 
WA_RKPLV_STR-XPRI sy-vline 
WA_RKPLV_STR-XERL sy-vline 
WA_RKPLV_STR-XILV sy-vline 
WA_RKPLV_STR-XAUF sy-vline 
WA_RKPLV_STR-XZUS sy-vline 
WA_RKPLV_STR-XSTA sy-vline 
WA_RKPLV_STR-VALUTYP sy-vline 
WA_RKPLV_STR-C_TWAER sy-vline 
WA_RKPLV_STR-C_OWAER sy-vline 
WA_RKPLV_STR-C_KWAER sy-vline 
WA_RKPLV_STR-P_OWAER sy-vline 
WA_RKPLV_STR-P_KWAER sy-vline      INTO ld_text SEPARATED BY SPACE.

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