ABAP Select data from SAP table RCGDUIOT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCGDUIOT 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 RCGDUIOT. 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 RCGDUIOT 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_RCGDUIOT TYPE STANDARD TABLE OF RCGDUIOT,
      WA_RCGDUIOT TYPE RCGDUIOT,
      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: <RCGDUIOT> TYPE RCGDUIOT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGDUIOT
*  INTO TABLE @DATA(IT_RCGDUIOT2).
*--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_RCGDUIOT INDEX 1 INTO DATA(WA_RCGDUIOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGDUIOT>-MARKFLG = 1.
<RCGDUIOT>-SELEFLG = 1.
<RCGDUIOT>-LINENO = 1.
<RCGDUIOT>-LINEMOD = 1.
<RCGDUIOT>-CHCOFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGDUIOT-LOCKMOD, sy-vline,
  WA_RCGDUIOT-INTRFLG, sy-vline,
  WA_RCGDUIOT-MANDT, sy-vline,
  WA_RCGDUIOT-RECN, sy-vline,
  WA_RCGDUIOT-ACTN, sy-vline,
  WA_RCGDUIOT-VALFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGDUIOT 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_RCGDUIOT 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_RCGDUIOT INTO WA_RCGDUIOT.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RECNMST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGDUIOT-RECNMST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGDUIOT-RECNMST.
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_RCGDUIOT_STR, 
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
NAMEMST TYPE STRING,
RECNMST TYPE STRING,
VACLID TYPE STRING,
RVLID TYPE STRING,
EXCLFLG TYPE STRING,
ACTVFLG TYPE STRING,
ESNTFLG TYPE STRING,
VACLNAM TYPE STRING,
RVLTYPE TYPE STRING,
RVLNAM TYPE STRING,
MARKTEXT TYPE STRING,
NOAUTHFLG TYPE STRING,
FLGSTATCONFL TYPE STRING,
LAND_STATUS TYPE STRING,
DETAIL_RVLID_STATUS TYPE STRING,
VALFR_STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGDUIOT_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_RCGDUIOT_STR-MARKFLG sy-vline 
WA_RCGDUIOT_STR-SELEFLG sy-vline 
WA_RCGDUIOT_STR-LINENO sy-vline 
WA_RCGDUIOT_STR-LINEMOD sy-vline 
WA_RCGDUIOT_STR-CHCOFLG sy-vline 
WA_RCGDUIOT_STR-LOCKMOD sy-vline 
WA_RCGDUIOT_STR-INTRFLG sy-vline 
WA_RCGDUIOT_STR-MANDT sy-vline 
WA_RCGDUIOT_STR-RECN sy-vline 
WA_RCGDUIOT_STR-ACTN sy-vline 
WA_RCGDUIOT_STR-VALFR sy-vline 
WA_RCGDUIOT_STR-VALTO sy-vline 
WA_RCGDUIOT_STR-AENNR sy-vline 
WA_RCGDUIOT_STR-DELFLG sy-vline 
WA_RCGDUIOT_STR-PARKFLG sy-vline 
WA_RCGDUIOT_STR-CRDAT sy-vline 
WA_RCGDUIOT_STR-CRNAM sy-vline 
WA_RCGDUIOT_STR-UPDDAT sy-vline 
WA_RCGDUIOT_STR-UPDNAM sy-vline 
WA_RCGDUIOT_STR-SRSID sy-vline 
WA_RCGDUIOT_STR-OWNID sy-vline 
WA_RCGDUIOT_STR-RECNROOT sy-vline 
WA_RCGDUIOT_STR-NAMEMST sy-vline 
WA_RCGDUIOT_STR-RECNMST sy-vline 
WA_RCGDUIOT_STR-VACLID sy-vline 
WA_RCGDUIOT_STR-RVLID sy-vline 
WA_RCGDUIOT_STR-EXCLFLG sy-vline 
WA_RCGDUIOT_STR-ACTVFLG sy-vline 
WA_RCGDUIOT_STR-ESNTFLG sy-vline 
WA_RCGDUIOT_STR-VACLNAM sy-vline 
WA_RCGDUIOT_STR-RVLTYPE sy-vline 
WA_RCGDUIOT_STR-RVLNAM sy-vline 
WA_RCGDUIOT_STR-MARKTEXT sy-vline 
WA_RCGDUIOT_STR-NOAUTHFLG sy-vline 
WA_RCGDUIOT_STR-FLGSTATCONFL sy-vline 
WA_RCGDUIOT_STR-LAND_STATUS sy-vline 
WA_RCGDUIOT_STR-DETAIL_RVLID_STATUS sy-vline 
WA_RCGDUIOT_STR-VALFR_STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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