ABAP Select data from SAP table RKDD_REOD_OUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKDD_REOD_OUT
*  INTO TABLE @DATA(IT_RKDD_REOD_OUT2).
*--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_RKDD_REOD_OUT INDEX 1 INTO DATA(WA_RKDD_REOD_OUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKDD_REOD_OUT>-MARK = 1.
<RKDD_REOD_OUT>-APPLCLASS = 1.
<RKDD_REOD_OUT>-SUBCLASS = 1.
<RKDD_REOD_OUT>-ASPET = 1.
<RKDD_REOD_OUT>-ERKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKDD_REOD_OUT-TABNAME, sy-vline,
  WA_RKDD_REOD_OUT-REPID, sy-vline,
  WA_RKDD_REOD_OUT-BERTXT, sy-vline,
  WA_RKDD_REOD_OUT-TABNM_T, sy-vline,
  WA_RKDD_REOD_OUT-UNAME, sy-vline,
  WA_RKDD_REOD_OUT-CNSUB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKDD_REOD_OUT 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_RKDD_REOD_OUT 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_RKDD_REOD_OUT INTO WA_RKDD_REOD_OUT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RKDD_REOD_OUT_STR, 
MARK TYPE STRING,
APPLCLASS TYPE STRING,
SUBCLASS TYPE STRING,
ASPET TYPE STRING,
ERKRS TYPE STRING,
TABNAME TYPE STRING,
REPID TYPE STRING,
BERTXT TYPE STRING,
TABNM_T TYPE STRING,
UNAME TYPE STRING,
CNSUB TYPE STRING,
LASUB TYPE STRING,
FORM TYPE STRING,
GDATE TYPE STRING,
MODDA TYPE STRING,
DDATE TYPE STRING,
DTIME TYPE STRING,
LNUM TYPE STRING,
DTYPE TYPE STRING,
RNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKDD_REOD_OUT_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_RKDD_REOD_OUT_STR-MARK sy-vline 
WA_RKDD_REOD_OUT_STR-APPLCLASS sy-vline 
WA_RKDD_REOD_OUT_STR-SUBCLASS sy-vline 
WA_RKDD_REOD_OUT_STR-ASPET sy-vline 
WA_RKDD_REOD_OUT_STR-ERKRS sy-vline 
WA_RKDD_REOD_OUT_STR-TABNAME sy-vline 
WA_RKDD_REOD_OUT_STR-REPID sy-vline 
WA_RKDD_REOD_OUT_STR-BERTXT sy-vline 
WA_RKDD_REOD_OUT_STR-TABNM_T sy-vline 
WA_RKDD_REOD_OUT_STR-UNAME sy-vline 
WA_RKDD_REOD_OUT_STR-CNSUB sy-vline 
WA_RKDD_REOD_OUT_STR-LASUB sy-vline 
WA_RKDD_REOD_OUT_STR-FORM sy-vline 
WA_RKDD_REOD_OUT_STR-GDATE sy-vline 
WA_RKDD_REOD_OUT_STR-MODDA sy-vline 
WA_RKDD_REOD_OUT_STR-DDATE sy-vline 
WA_RKDD_REOD_OUT_STR-DTIME sy-vline 
WA_RKDD_REOD_OUT_STR-LNUM sy-vline 
WA_RKDD_REOD_OUT_STR-DTYPE sy-vline 
WA_RKDD_REOD_OUT_STR-RNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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