ABAP Select data from SAP table RDUNN_ACCOUNT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDUNN_ACCOUNT
*  INTO TABLE @DATA(IT_RDUNN_ACCOUNT2).
*--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_RDUNN_ACCOUNT INDEX 1 INTO DATA(WA_RDUNN_ACCOUNT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDUNN_ACCOUNT>-MANDT = 1.
<RDUNN_ACCOUNT>-LAUFD = 1.
<RDUNN_ACCOUNT>-LAUFI = 1.
<RDUNN_ACCOUNT>-BUKRS = 1.
<RDUNN_ACCOUNT>-CPDKY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDUNN_ACCOUNT-SMABER, sy-vline,
  WA_RDUNN_ACCOUNT-BUSAB, sy-vline,
  WA_RDUNN_ACCOUNT-AUSDT, sy-vline,
  WA_RDUNN_ACCOUNT-GMVDT, sy-vline,
  WA_RDUNN_ACCOUNT-MAHNA, sy-vline,
  WA_RDUNN_ACCOUNT-MAHNS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDUNN_ACCOUNT 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_RDUNN_ACCOUNT 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_RDUNN_ACCOUNT INTO WA_RDUNN_ACCOUNT.


*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_RDUNN_ACCOUNT_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
BUKRS TYPE STRING,
CPDKY TYPE STRING,
SMABER TYPE STRING,
BUSAB TYPE STRING,
AUSDT TYPE STRING,
GMVDT TYPE STRING,
MAHNA TYPE STRING,
MAHNS TYPE STRING,
XMFLG TYPE STRING,
MANSP TYPE STRING,
MAHSK TYPE STRING,
MAHSA TYPE STRING,
XZINS TYPE STRING,
MGRUP TYPE STRING,
WAERS TYPE STRING,
SALDO TYPE STRING,
SALHW TYPE STRING,
FAMSM TYPE STRING,
FAMSH TYPE STRING,
MHNGH TYPE STRING,
MHNGF TYPE STRING,
OVDLC TYPE STRING,
OVDFC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDUNN_ACCOUNT_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_RDUNN_ACCOUNT_STR-MANDT sy-vline 
WA_RDUNN_ACCOUNT_STR-LAUFD sy-vline 
WA_RDUNN_ACCOUNT_STR-LAUFI sy-vline 
WA_RDUNN_ACCOUNT_STR-BUKRS sy-vline 
WA_RDUNN_ACCOUNT_STR-CPDKY sy-vline 
WA_RDUNN_ACCOUNT_STR-SMABER sy-vline 
WA_RDUNN_ACCOUNT_STR-BUSAB sy-vline 
WA_RDUNN_ACCOUNT_STR-AUSDT sy-vline 
WA_RDUNN_ACCOUNT_STR-GMVDT sy-vline 
WA_RDUNN_ACCOUNT_STR-MAHNA sy-vline 
WA_RDUNN_ACCOUNT_STR-MAHNS sy-vline 
WA_RDUNN_ACCOUNT_STR-XMFLG sy-vline 
WA_RDUNN_ACCOUNT_STR-MANSP sy-vline 
WA_RDUNN_ACCOUNT_STR-MAHSK sy-vline 
WA_RDUNN_ACCOUNT_STR-MAHSA sy-vline 
WA_RDUNN_ACCOUNT_STR-XZINS sy-vline 
WA_RDUNN_ACCOUNT_STR-MGRUP sy-vline 
WA_RDUNN_ACCOUNT_STR-WAERS sy-vline 
WA_RDUNN_ACCOUNT_STR-SALDO sy-vline 
WA_RDUNN_ACCOUNT_STR-SALHW sy-vline 
WA_RDUNN_ACCOUNT_STR-FAMSM sy-vline 
WA_RDUNN_ACCOUNT_STR-FAMSH sy-vline 
WA_RDUNN_ACCOUNT_STR-MHNGH sy-vline 
WA_RDUNN_ACCOUNT_STR-MHNGF sy-vline 
WA_RDUNN_ACCOUNT_STR-OVDLC sy-vline 
WA_RDUNN_ACCOUNT_STR-OVDFC sy-vline      INTO ld_text SEPARATED BY SPACE.

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