ABAP Select data from SAP table RKCT259 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKCT259 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 RKCT259. 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 RKCT259 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_RKCT259 TYPE STANDARD TABLE OF RKCT259,
      WA_RKCT259 TYPE RKCT259,
      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: <RKCT259> TYPE RKCT259.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RKCT259.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RKCT259
  INTO TABLE IT_RKCT259.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKCT259
*  INTO TABLE @DATA(IT_RKCT2592).
*--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_RKCT259 INDEX 1 INTO DATA(WA_RKCT2592).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RKCT259 ASSIGNING <RKCT259>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKCT259>-BUKRS = 1.
<RKCT259>-CVI10020 = 1.
<RKCT259>-CVI10120 = 1.
<RKCT259>-CVI10190 = 1.
<RKCT259>-CVI10220 = 1.

ENDLOOP.

LOOP AT IT_RKCT259 INTO WA_RKCT259.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKCT259-CVI10280, sy-vline,
  WA_RKCT259-CVI10290, sy-vline,
  WA_RKCT259-CVI10300, sy-vline,
  WA_RKCT259-CVI10310, sy-vline,
  WA_RKCT259-CVI10330, sy-vline,
  WA_RKCT259-CVI10350, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKCT259 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_RKCT259 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_RKCT259 INTO WA_RKCT259.


*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 PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKCT259-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKCT259-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VVIQT_ME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RKCT259-VVIQT_ME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKCT259-VVIQT_ME.
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_RKCT259_STR, 
BUKRS TYPE STRING,
CVI10020 TYPE STRING,
CVI10120 TYPE STRING,
CVI10190 TYPE STRING,
CVI10220 TYPE STRING,
CVI10280 TYPE STRING,
CVI10290 TYPE STRING,
CVI10300 TYPE STRING,
CVI10310 TYPE STRING,
CVI10330 TYPE STRING,
CVI10350 TYPE STRING,
CVI10360 TYPE STRING,
CVI10370 TYPE STRING,
CVI10380 TYPE STRING,
CVI10390 TYPE STRING,
CVI10400 TYPE STRING,
GSBER TYPE STRING,
KDGRP TYPE STRING,
KOKRS TYPE STRING,
KOKRS01 TYPE STRING,
LAND1 TYPE STRING,
PERDE TYPE STRING,
PRCTR TYPE STRING,
SPART TYPE STRING,
VRGAR TYPE STRING,
VV010 TYPE STRING,
VV240 TYPE STRING,
VV280 TYPE STRING,
VV420 TYPE STRING,
VVIQT TYPE STRING,
VVIQT_ME TYPE STRING,
WERKS TYPE STRING,
WWPH1 TYPE STRING,
YEARB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKCT259_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_RKCT259_STR-BUKRS sy-vline 
WA_RKCT259_STR-CVI10020 sy-vline 
WA_RKCT259_STR-CVI10120 sy-vline 
WA_RKCT259_STR-CVI10190 sy-vline 
WA_RKCT259_STR-CVI10220 sy-vline 
WA_RKCT259_STR-CVI10280 sy-vline 
WA_RKCT259_STR-CVI10290 sy-vline 
WA_RKCT259_STR-CVI10300 sy-vline 
WA_RKCT259_STR-CVI10310 sy-vline 
WA_RKCT259_STR-CVI10330 sy-vline 
WA_RKCT259_STR-CVI10350 sy-vline 
WA_RKCT259_STR-CVI10360 sy-vline 
WA_RKCT259_STR-CVI10370 sy-vline 
WA_RKCT259_STR-CVI10380 sy-vline 
WA_RKCT259_STR-CVI10390 sy-vline 
WA_RKCT259_STR-CVI10400 sy-vline 
WA_RKCT259_STR-GSBER sy-vline 
WA_RKCT259_STR-KDGRP sy-vline 
WA_RKCT259_STR-KOKRS sy-vline 
WA_RKCT259_STR-KOKRS01 sy-vline 
WA_RKCT259_STR-LAND1 sy-vline 
WA_RKCT259_STR-PERDE sy-vline 
WA_RKCT259_STR-PRCTR sy-vline 
WA_RKCT259_STR-SPART sy-vline 
WA_RKCT259_STR-VRGAR sy-vline 
WA_RKCT259_STR-VV010 sy-vline 
WA_RKCT259_STR-VV240 sy-vline 
WA_RKCT259_STR-VV280 sy-vline 
WA_RKCT259_STR-VV420 sy-vline 
WA_RKCT259_STR-VVIQT sy-vline 
WA_RKCT259_STR-VVIQT_ME sy-vline 
WA_RKCT259_STR-WERKS sy-vline 
WA_RKCT259_STR-WWPH1 sy-vline 
WA_RKCT259_STR-YEARB sy-vline      INTO ld_text SEPARATED BY SPACE.

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