ABAP Select data from SAP table RODKYF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RODKYF
*  INTO TABLE @DATA(IT_RODKYF2).
*--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_RODKYF INDEX 1 INTO DATA(WA_RODKYF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RODKYF>-KYFNM = 1.
<RODKYF>-APPLNM = 1.
<RODKYF>-DTELNM = 1.
<RODKYF>-KYFTP = 1.
<RODKYF>-NCUMFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RODKYF-FIXCUKY, sy-vline,
  WA_RODKYF-FIXUNIT, sy-vline,
  WA_RODKYF-AGGRGEN, sy-vline,
  WA_RODKYF-AGGREXC, sy-vline,
  WA_RODKYF-AGGRCHA, sy-vline,
  WA_RODKYF-UNINM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RODKYF 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_RODKYF 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_RODKYF INTO WA_RODKYF.


*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 CUNIT, internal->external for field FIXUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RODKYF-FIXUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RODKYF-FIXUNIT.
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_RODKYF_STR, 
KYFNM TYPE STRING,
APPLNM TYPE STRING,
DTELNM TYPE STRING,
KYFTP TYPE STRING,
NCUMFL TYPE STRING,
FIXCUKY TYPE STRING,
FIXUNIT TYPE STRING,
AGGRGEN TYPE STRING,
AGGREXC TYPE STRING,
AGGRCHA TYPE STRING,
UNINM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RODKYF_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_RODKYF_STR-KYFNM sy-vline 
WA_RODKYF_STR-APPLNM sy-vline 
WA_RODKYF_STR-DTELNM sy-vline 
WA_RODKYF_STR-KYFTP sy-vline 
WA_RODKYF_STR-NCUMFL sy-vline 
WA_RODKYF_STR-FIXCUKY sy-vline 
WA_RODKYF_STR-FIXUNIT sy-vline 
WA_RODKYF_STR-AGGRGEN sy-vline 
WA_RODKYF_STR-AGGREXC sy-vline 
WA_RODKYF_STR-AGGRCHA sy-vline 
WA_RODKYF_STR-UNINM sy-vline      INTO ld_text SEPARATED BY SPACE.

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