ABAP Select data from SAP table RSD98 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RSD98 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 RSD98. 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 RSD98 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_RSD98 TYPE STANDARD TABLE OF RSD98,
      WA_RSD98 TYPE RSD98,
      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: <RSD98> TYPE RSD98.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RSD98.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RSD98
  INTO TABLE IT_RSD98.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RSD98
*  INTO TABLE @DATA(IT_RSD982).
*--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_RSD98 INDEX 1 INTO DATA(WA_RSD982).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RSD98 ASSIGNING <RSD98>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RSD98>-FCLNT = 1.
<RSD98>-KCHAR = 1.
<RSD98>-FACCP = 1.
<RSD98>-FCUKY = 1.
<RSD98>-FCURR = 1.

ENDLOOP.

LOOP AT IT_RSD98 INTO WA_RSD98.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RSD98-FDATS, sy-vline,
  WA_RSD98-FDEC, sy-vline,
  WA_RSD98-FFLTP, sy-vline,
  WA_RSD98-FCURR1, sy-vline,
  WA_RSD98-FINT1, sy-vline,
  WA_RSD98-FINT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RSD98 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_RSD98 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_RSD98 INTO WA_RSD98.


*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 FLANG1
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RSD98-FLANG1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RSD98-FLANG1.
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_RSD98_STR, 
FCLNT TYPE STRING,
KCHAR TYPE STRING,
FACCP TYPE STRING,
FCUKY TYPE STRING,
FCURR TYPE STRING,
FDATS TYPE STRING,
FDEC TYPE STRING,
FFLTP TYPE STRING,
FCURR1 TYPE STRING,
FINT1 TYPE STRING,
FINT2 TYPE STRING,
FINT4 TYPE STRING,
FLANG TYPE STRING,
FNUMC TYPE STRING,
FDEC1 TYPE STRING,
FPREC TYPE STRING,
FQUAN TYPE STRING,
FLANG1 TYPE STRING,
FRAW TYPE STRING,
FTIMS TYPE STRING,
FQUAN1 TYPE STRING,
FUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RSD98_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_RSD98_STR-FCLNT sy-vline 
WA_RSD98_STR-KCHAR sy-vline 
WA_RSD98_STR-FACCP sy-vline 
WA_RSD98_STR-FCUKY sy-vline 
WA_RSD98_STR-FCURR sy-vline 
WA_RSD98_STR-FDATS sy-vline 
WA_RSD98_STR-FDEC sy-vline 
WA_RSD98_STR-FFLTP sy-vline 
WA_RSD98_STR-FCURR1 sy-vline 
WA_RSD98_STR-FINT1 sy-vline 
WA_RSD98_STR-FINT2 sy-vline 
WA_RSD98_STR-FINT4 sy-vline 
WA_RSD98_STR-FLANG sy-vline 
WA_RSD98_STR-FNUMC sy-vline 
WA_RSD98_STR-FDEC1 sy-vline 
WA_RSD98_STR-FPREC sy-vline 
WA_RSD98_STR-FQUAN sy-vline 
WA_RSD98_STR-FLANG1 sy-vline 
WA_RSD98_STR-FRAW sy-vline 
WA_RSD98_STR-FTIMS sy-vline 
WA_RSD98_STR-FQUAN1 sy-vline 
WA_RSD98_STR-FUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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