ABAP Select data from SAP table RKPT3_COMMON into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKPT3_COMMON 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 RKPT3_COMMON. 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 RKPT3_COMMON 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_RKPT3_COMMON TYPE STANDARD TABLE OF RKPT3_COMMON,
      WA_RKPT3_COMMON TYPE RKPT3_COMMON,
      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: <RKPT3_COMMON> TYPE RKPT3_COMMON.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RKPT3_COMMON.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RKPT3_COMMON
  INTO TABLE IT_RKPT3_COMMON.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKPT3_COMMON
*  INTO TABLE @DATA(IT_RKPT3_COMMON2).
*--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_RKPT3_COMMON INDEX 1 INTO DATA(WA_RKPT3_COMMON2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RKPT3_COMMON ASSIGNING <RKPT3_COMMON>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKPT3_COMMON>-SVERSN = 1.
<RKPT3_COMMON>-SGJAHR = 1.
<RKPT3_COMMON>-SPERAB = 1.
<RKPT3_COMMON>-SPERBI = 1.
<RKPT3_COMMON>-TVERSN = 1.

ENDLOOP.

LOOP AT IT_RKPT3_COMMON INTO WA_RKPT3_COMMON.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKPT3_COMMON-TGJAHR, sy-vline,
  WA_RKPT3_COMMON-TPERAB, sy-vline,
  WA_RKPT3_COMMON-TPERBI, sy-vline,
  WA_RKPT3_COMMON-SKOSTL, sy-vline,
  WA_RKPT3_COMMON-SPRZNR, sy-vline,
  WA_RKPT3_COMMON-SAUFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKPT3_COMMON 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_RKPT3_COMMON 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_RKPT3_COMMON INTO WA_RKPT3_COMMON.


*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 SVERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-SVERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-SVERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field SGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-SGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-SGJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TVERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-TVERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-TVERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field TGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-TGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-TGJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SKOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-SKOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-SKOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SPRZNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-SPRZNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-SPRZNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-SAUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-SAUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field SWBS
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RKPT3_COMMON-SWBS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPT3_COMMON-SWBS.
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_RKPT3_COMMON_STR, 
SVERSN TYPE STRING,
SGJAHR TYPE STRING,
SPERAB TYPE STRING,
SPERBI TYPE STRING,
TVERSN TYPE STRING,
TGJAHR TYPE STRING,
TPERAB TYPE STRING,
TPERBI TYPE STRING,
SKOSTL TYPE STRING,
SPRZNR TYPE STRING,
SAUFNR TYPE STRING,
SWBS TYPE STRING,
REVPRCT TYPE STRING,
FOVER TYPE STRING,
FOVER_PERIO TYPE STRING,
VALUTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKPT3_COMMON_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_RKPT3_COMMON_STR-SVERSN sy-vline 
WA_RKPT3_COMMON_STR-SGJAHR sy-vline 
WA_RKPT3_COMMON_STR-SPERAB sy-vline 
WA_RKPT3_COMMON_STR-SPERBI sy-vline 
WA_RKPT3_COMMON_STR-TVERSN sy-vline 
WA_RKPT3_COMMON_STR-TGJAHR sy-vline 
WA_RKPT3_COMMON_STR-TPERAB sy-vline 
WA_RKPT3_COMMON_STR-TPERBI sy-vline 
WA_RKPT3_COMMON_STR-SKOSTL sy-vline 
WA_RKPT3_COMMON_STR-SPRZNR sy-vline 
WA_RKPT3_COMMON_STR-SAUFNR sy-vline 
WA_RKPT3_COMMON_STR-SWBS sy-vline 
WA_RKPT3_COMMON_STR-REVPRCT sy-vline 
WA_RKPT3_COMMON_STR-FOVER sy-vline 
WA_RKPT3_COMMON_STR-FOVER_PERIO sy-vline 
WA_RKPT3_COMMON_STR-VALUTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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