ABAP Select data from SAP table RNDUNF_INPUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNDUNF_INPUT
*  INTO TABLE @DATA(IT_RNDUNF_INPUT2).
*--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_RNDUNF_INPUT INDEX 1 INTO DATA(WA_RNDUNF_INPUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNDUNF_INPUT>-UNFKZ = 1.
<RNDUNF_INPUT>-UNFDT = 1.
<RNDUNF_INPUT>-UNFZT = 1.
<RNDUNF_INPUT>-UNFOR = 1.
<RNDUNF_INPUT>-UNFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNDUNF_INPUT-UNFRN, sy-vline,
  WA_RNDUNF_INPUT-UNFVS, sy-vline,
  WA_RNDUNF_INPUT-UNFRT, sy-vline,
  WA_RNDUNF_INPUT-UNFAV, sy-vline,
  WA_RNDUNF_INPUT-UNFTX, sy-vline,
  WA_RNDUNF_INPUT-UNFLX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNDUNF_INPUT 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_RNDUNF_INPUT 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_RNDUNF_INPUT INTO WA_RNDUNF_INPUT.


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

*Conversion exit ALPHA, internal->external for field UNFRN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDUNF_INPUT-UNFRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDUNF_INPUT-UNFRN.
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_RNDUNF_INPUT_STR, 
UNFKZ TYPE STRING,
UNFDT TYPE STRING,
UNFZT TYPE STRING,
UNFOR TYPE STRING,
UNFNR TYPE STRING,
UNFRN TYPE STRING,
UNFVS TYPE STRING,
UNFRT TYPE STRING,
UNFAV TYPE STRING,
UNFTX TYPE STRING,
UNFLX TYPE STRING,
PLSNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNDUNF_INPUT_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_RNDUNF_INPUT_STR-UNFKZ sy-vline 
WA_RNDUNF_INPUT_STR-UNFDT sy-vline 
WA_RNDUNF_INPUT_STR-UNFZT sy-vline 
WA_RNDUNF_INPUT_STR-UNFOR sy-vline 
WA_RNDUNF_INPUT_STR-UNFNR sy-vline 
WA_RNDUNF_INPUT_STR-UNFRN sy-vline 
WA_RNDUNF_INPUT_STR-UNFVS sy-vline 
WA_RNDUNF_INPUT_STR-UNFRT sy-vline 
WA_RNDUNF_INPUT_STR-UNFAV sy-vline 
WA_RNDUNF_INPUT_STR-UNFTX sy-vline 
WA_RNDUNF_INPUT_STR-UNFLX sy-vline 
WA_RNDUNF_INPUT_STR-PLSNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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