ABAP Select data from SAP table RK23O_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RK23O_DATA 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 RK23O_DATA. 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 RK23O_DATA 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_RK23O_DATA TYPE STANDARD TABLE OF RK23O_DATA,
      WA_RK23O_DATA TYPE RK23O_DATA,
      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: <RK23O_DATA> TYPE RK23O_DATA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RK23O_DATA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RK23O_DATA
  INTO TABLE IT_RK23O_DATA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RK23O_DATA
*  INTO TABLE @DATA(IT_RK23O_DATA2).
*--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_RK23O_DATA INDEX 1 INTO DATA(WA_RK23O_DATA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RK23O_DATA ASSIGNING <RK23O_DATA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RK23O_DATA>-OBJNR = 1.
<RK23O_DATA>-OWAER = 1.
<RK23O_DATA>-SCOPE = 1.
<RK23O_DATA>-KOKRS = 1.
<RK23O_DATA>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_RK23O_DATA INTO WA_RK23O_DATA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RK23O_DATA-GSBER, sy-vline,
  WA_RK23O_DATA-WERKS, sy-vline,
  WA_RK23O_DATA-PRCTR, sy-vline,
  WA_RK23O_DATA-VNAME, sy-vline,
  WA_RK23O_DATA-RECID, sy-vline,
  WA_RK23O_DATA-ETYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RK23O_DATA 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_RK23O_DATA 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_RK23O_DATA INTO WA_RK23O_DATA.


*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 SCOPE, internal->external for field SCOPE
CALL FUNCTION 'CONVERSION_EXIT_SCOPE_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-SCOPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-SCOPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-VNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-RECID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ETYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-ETYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-ETYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EGRUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-EGRUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-EGRUP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-VEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-VEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKOST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-AKOST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-AKOST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field APSPN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-APSPN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-APSPN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-LEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-LEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUSEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-AUSEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-AUSEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKSTA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-VKSTA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-VKSTA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PKOSA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-PKOSA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-PKOSA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK23O_DATA-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK23O_DATA-LOGSYSTEM.
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_RK23O_DATA_STR, 
OBJNR TYPE STRING,
OWAER TYPE STRING,
SCOPE TYPE STRING,
KOKRS TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
WERKS TYPE STRING,
PRCTR TYPE STRING,
VNAME TYPE STRING,
RECID TYPE STRING,
ETYPE TYPE STRING,
EGRUP TYPE STRING,
GBBIL TYPE STRING,
STAKZ TYPE STRING,
KTEXT TYPE STRING,
MGEFL TYPE STRING,
VEINH TYPE STRING,
SANZA TYPE STRING,
EANZA TYPE STRING,
BKZKP TYPE STRING,
BKZKS TYPE STRING,
BKZER TYPE STRING,
KOSAR TYPE STRING,
COPAR TYPE STRING,
ERLOESE TYPE STRING,
VOGRP TYPE STRING,
VORNR TYPE STRING,
AKOST TYPE STRING,
APSPN TYPE STRING,
LATYP TYPE STRING,
LEINH TYPE STRING,
LATXT TYPE STRING,
KSTTY TYPE STRING,
AUSEH TYPE STRING,
AUSFK TYPE STRING,
VKSTA TYPE STRING,
PKOSA TYPE STRING,
MATNR TYPE STRING,
VERID TYPE STRING,
PROCNR TYPE STRING,
ERKRS TYPE STRING,
LOGSYSTEM TYPE STRING,
XOBJTXT TYPE STRING,
MANIST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RK23O_DATA_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_RK23O_DATA_STR-OBJNR sy-vline 
WA_RK23O_DATA_STR-OWAER sy-vline 
WA_RK23O_DATA_STR-SCOPE sy-vline 
WA_RK23O_DATA_STR-KOKRS sy-vline 
WA_RK23O_DATA_STR-BUKRS sy-vline 
WA_RK23O_DATA_STR-GSBER sy-vline 
WA_RK23O_DATA_STR-WERKS sy-vline 
WA_RK23O_DATA_STR-PRCTR sy-vline 
WA_RK23O_DATA_STR-VNAME sy-vline 
WA_RK23O_DATA_STR-RECID sy-vline 
WA_RK23O_DATA_STR-ETYPE sy-vline 
WA_RK23O_DATA_STR-EGRUP sy-vline 
WA_RK23O_DATA_STR-GBBIL sy-vline 
WA_RK23O_DATA_STR-STAKZ sy-vline 
WA_RK23O_DATA_STR-KTEXT sy-vline 
WA_RK23O_DATA_STR-MGEFL sy-vline 
WA_RK23O_DATA_STR-VEINH sy-vline 
WA_RK23O_DATA_STR-SANZA sy-vline 
WA_RK23O_DATA_STR-EANZA sy-vline 
WA_RK23O_DATA_STR-BKZKP sy-vline 
WA_RK23O_DATA_STR-BKZKS sy-vline 
WA_RK23O_DATA_STR-BKZER sy-vline 
WA_RK23O_DATA_STR-KOSAR sy-vline 
WA_RK23O_DATA_STR-COPAR sy-vline 
WA_RK23O_DATA_STR-ERLOESE sy-vline 
WA_RK23O_DATA_STR-VOGRP sy-vline 
WA_RK23O_DATA_STR-VORNR sy-vline 
WA_RK23O_DATA_STR-AKOST sy-vline 
WA_RK23O_DATA_STR-APSPN sy-vline 
WA_RK23O_DATA_STR-LATYP sy-vline 
WA_RK23O_DATA_STR-LEINH sy-vline 
WA_RK23O_DATA_STR-LATXT sy-vline 
WA_RK23O_DATA_STR-KSTTY sy-vline 
WA_RK23O_DATA_STR-AUSEH sy-vline 
WA_RK23O_DATA_STR-AUSFK sy-vline 
WA_RK23O_DATA_STR-VKSTA sy-vline 
WA_RK23O_DATA_STR-PKOSA sy-vline 
WA_RK23O_DATA_STR-MATNR sy-vline 
WA_RK23O_DATA_STR-VERID sy-vline 
WA_RK23O_DATA_STR-PROCNR sy-vline 
WA_RK23O_DATA_STR-ERKRS sy-vline 
WA_RK23O_DATA_STR-LOGSYSTEM sy-vline 
WA_RK23O_DATA_STR-XOBJTXT sy-vline 
WA_RK23O_DATA_STR-MANIST sy-vline      INTO ld_text SEPARATED BY SPACE.

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