ABAP Select data from SAP table RSD99 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RSD99 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 RSD99. 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 RSD99 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_RSD99 TYPE STANDARD TABLE OF RSD99,
      WA_RSD99 TYPE RSD99,
      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: <RSD99> TYPE RSD99.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RSD99.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RSD99
  INTO TABLE IT_RSD99.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RSD99
*  INTO TABLE @DATA(IT_RSD992).
*--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_RSD99 INDEX 1 INTO DATA(WA_RSD992).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RSD99 ASSIGNING <RSD99>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RSD99>-KCHAR = 1.
<RSD99>-FACCP = 1.
<RSD99>-FCLNT = 1.
<RSD99>-FCUKY = 1.
<RSD99>-FCURR = 1.

ENDLOOP.

LOOP AT IT_RSD99 INTO WA_RSD99.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RSD99-FDATS, sy-vline,
  WA_RSD99-FDEC, sy-vline,
  WA_RSD99-FFLTP, sy-vline,
  WA_RSD99-FINT1, sy-vline,
  WA_RSD99-FINT2, sy-vline,
  WA_RSD99-FINT4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RSD99 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_RSD99 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_RSD99 INTO WA_RSD99.


*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 ISOLA, internal->external for field FLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RSD99-FLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RSD99-FLANG.
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_RSD99_STR, 
KCHAR TYPE STRING,
FACCP TYPE STRING,
FCLNT TYPE STRING,
FCUKY TYPE STRING,
FCURR TYPE STRING,
FDATS TYPE STRING,
FDEC TYPE STRING,
FFLTP TYPE STRING,
FINT1 TYPE STRING,
FINT2 TYPE STRING,
FINT4 TYPE STRING,
FLANG TYPE STRING,
FNUMC TYPE STRING,
FPREC TYPE STRING,
FQUAN TYPE STRING,
FRAW TYPE STRING,
FTIMS TYPE STRING,
FUNIT TYPE STRING,
FSSTRING TYPE STRING,
FSTRING TYPE STRING,
FRSTRING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RSD99_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_RSD99_STR-KCHAR sy-vline 
WA_RSD99_STR-FACCP sy-vline 
WA_RSD99_STR-FCLNT sy-vline 
WA_RSD99_STR-FCUKY sy-vline 
WA_RSD99_STR-FCURR sy-vline 
WA_RSD99_STR-FDATS sy-vline 
WA_RSD99_STR-FDEC sy-vline 
WA_RSD99_STR-FFLTP sy-vline 
WA_RSD99_STR-FINT1 sy-vline 
WA_RSD99_STR-FINT2 sy-vline 
WA_RSD99_STR-FINT4 sy-vline 
WA_RSD99_STR-FLANG sy-vline 
WA_RSD99_STR-FNUMC sy-vline 
WA_RSD99_STR-FPREC sy-vline 
WA_RSD99_STR-FQUAN sy-vline 
WA_RSD99_STR-FRAW sy-vline 
WA_RSD99_STR-FTIMS sy-vline 
WA_RSD99_STR-FUNIT sy-vline 
WA_RSD99_STR-FSSTRING sy-vline 
WA_RSD99_STR-FSTRING sy-vline 
WA_RSD99_STR-FRSTRING sy-vline      INTO ld_text SEPARATED BY SPACE.

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