ABAP Select data from SAP table RNSERVICE_FORM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNSERVICE_FORM
*  INTO TABLE @DATA(IT_RNSERVICE_FORM2).
*--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_RNSERVICE_FORM INDEX 1 INTO DATA(WA_RNSERVICE_FORM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNSERVICE_FORM>-SEQ_NUMBER = 1.
<RNSERVICE_FORM>-TARIF = 1.
<RNSERVICE_FORM>-LEIST = 1.
<RNSERVICE_FORM>-LNRLS = 1.
<RNSERVICE_FORM>-TEXT1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNSERVICE_FORM-ALTTXT, sy-vline,
  WA_RNSERVICE_FORM-TOOLTIP, sy-vline,
  WA_RNSERVICE_FORM-LOG_GROUP, sy-vline,
  WA_RNSERVICE_FORM-AMOUNT, sy-vline,
  WA_RNSERVICE_FORM-ICON, sy-vline,
  WA_RNSERVICE_FORM-PICTURE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNSERVICE_FORM 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_RNSERVICE_FORM 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_RNSERVICE_FORM INTO WA_RNSERVICE_FORM.


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

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

*Conversion exit ALPHA, internal->external for field LNRLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNSERVICE_FORM-LNRLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNSERVICE_FORM-LNRLS.
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_RNSERVICE_FORM_STR, 
SEQ_NUMBER TYPE STRING,
TARIF TYPE STRING,
LEIST TYPE STRING,
LNRLS TYPE STRING,
TEXT1 TYPE STRING,
ALTTXT TYPE STRING,
TOOLTIP TYPE STRING,
LOG_GROUP TYPE STRING,
AMOUNT TYPE STRING,
ICON TYPE STRING,
PICTURE TYPE STRING,
SHOW_PIC TYPE STRING,
ADDTEXT1 TYPE STRING,
TOOLTIP1 TYPE STRING,
ADDTEXT2 TYPE STRING,
TOOLTIP2 TYPE STRING,
ADDTEXT3 TYPE STRING,
TOOLTIP3 TYPE STRING,
ADDTEXT4 TYPE STRING,
TOOLTIP4 TYPE STRING,
COLOR TYPE STRING,
EMPHASIS TYPE STRING,
ON_DB TYPE STRING,
LINK_NAME TYPE STRING,
MARKED TYPE STRING,
CHECKED TYPE STRING,
LINK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNSERVICE_FORM_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_RNSERVICE_FORM_STR-SEQ_NUMBER sy-vline 
WA_RNSERVICE_FORM_STR-TARIF sy-vline 
WA_RNSERVICE_FORM_STR-LEIST sy-vline 
WA_RNSERVICE_FORM_STR-LNRLS sy-vline 
WA_RNSERVICE_FORM_STR-TEXT1 sy-vline 
WA_RNSERVICE_FORM_STR-ALTTXT sy-vline 
WA_RNSERVICE_FORM_STR-TOOLTIP sy-vline 
WA_RNSERVICE_FORM_STR-LOG_GROUP sy-vline 
WA_RNSERVICE_FORM_STR-AMOUNT sy-vline 
WA_RNSERVICE_FORM_STR-ICON sy-vline 
WA_RNSERVICE_FORM_STR-PICTURE sy-vline 
WA_RNSERVICE_FORM_STR-SHOW_PIC sy-vline 
WA_RNSERVICE_FORM_STR-ADDTEXT1 sy-vline 
WA_RNSERVICE_FORM_STR-TOOLTIP1 sy-vline 
WA_RNSERVICE_FORM_STR-ADDTEXT2 sy-vline 
WA_RNSERVICE_FORM_STR-TOOLTIP2 sy-vline 
WA_RNSERVICE_FORM_STR-ADDTEXT3 sy-vline 
WA_RNSERVICE_FORM_STR-TOOLTIP3 sy-vline 
WA_RNSERVICE_FORM_STR-ADDTEXT4 sy-vline 
WA_RNSERVICE_FORM_STR-TOOLTIP4 sy-vline 
WA_RNSERVICE_FORM_STR-COLOR sy-vline 
WA_RNSERVICE_FORM_STR-EMPHASIS sy-vline 
WA_RNSERVICE_FORM_STR-ON_DB sy-vline 
WA_RNSERVICE_FORM_STR-LINK_NAME sy-vline 
WA_RNSERVICE_FORM_STR-MARKED sy-vline 
WA_RNSERVICE_FORM_STR-CHECKED sy-vline 
WA_RNSERVICE_FORM_STR-LINK sy-vline      INTO ld_text SEPARATED BY SPACE.

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