ABAP Select data from SAP table RDGUCADM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDGUCADM
*  INTO TABLE @DATA(IT_RDGUCADM2).
*--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_RDGUCADM INDEX 1 INTO DATA(WA_RDGUCADM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDGUCADM>-TBNAM = 1.
<RDGUCADM>-PARVW = 1.
<RDGUCADM>-TDOBJECT = 1.
<RDGUCADM>-FEHGR = 1.
<RDGUCADM>-TDID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDGUCADM-FDNAM, sy-vline,
  WA_RDGUCADM-PSTYV, sy-vline,
  WA_RDGUCADM-FCODE, sy-vline,
  WA_RDGUCADM-SORTF, sy-vline,
  WA_RDGUCADM-STATG, sy-vline,
  WA_RDGUCADM-UVALL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDGUCADM 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_RDGUCADM 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_RDGUCADM INTO WA_RDGUCADM.


*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 PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_RDGUCADM-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDGUCADM-PARVW.
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_RDGUCADM_STR, 
TBNAM TYPE STRING,
PARVW TYPE STRING,
TDOBJECT TYPE STRING,
FEHGR TYPE STRING,
TDID TYPE STRING,
FDNAM TYPE STRING,
PSTYV TYPE STRING,
FCODE TYPE STRING,
SORTF TYPE STRING,
STATG TYPE STRING,
UVALL TYPE STRING,
UVVLK TYPE STRING,
UVFAK TYPE STRING,
UVPRS TYPE STRING,
UVWAK TYPE STRING,
UVPIK TYPE STRING,
UVPAK TYPE STRING,
ITEMS TYPE STRING,
ITDEP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDGUCADM_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_RDGUCADM_STR-TBNAM sy-vline 
WA_RDGUCADM_STR-PARVW sy-vline 
WA_RDGUCADM_STR-TDOBJECT sy-vline 
WA_RDGUCADM_STR-FEHGR sy-vline 
WA_RDGUCADM_STR-TDID sy-vline 
WA_RDGUCADM_STR-FDNAM sy-vline 
WA_RDGUCADM_STR-PSTYV sy-vline 
WA_RDGUCADM_STR-FCODE sy-vline 
WA_RDGUCADM_STR-SORTF sy-vline 
WA_RDGUCADM_STR-STATG sy-vline 
WA_RDGUCADM_STR-UVALL sy-vline 
WA_RDGUCADM_STR-UVVLK sy-vline 
WA_RDGUCADM_STR-UVFAK sy-vline 
WA_RDGUCADM_STR-UVPRS sy-vline 
WA_RDGUCADM_STR-UVWAK sy-vline 
WA_RDGUCADM_STR-UVPIK sy-vline 
WA_RDGUCADM_STR-UVPAK sy-vline 
WA_RDGUCADM_STR-ITEMS sy-vline 
WA_RDGUCADM_STR-ITDEP sy-vline      INTO ld_text SEPARATED BY SPACE.

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