ABAP Select data from SAP table ROOSSFLDTF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROOSSFLDTF
*  INTO TABLE @DATA(IT_ROOSSFLDTF2).
*--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_ROOSSFLDTF INDEX 1 INTO DATA(WA_ROOSSFLDTF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROOSSFLDTF>-OLTPSOURCE = 1.
<ROOSSFLDTF>-OBJVERS = 1.
<ROOSSFLDTF>-SEGID = 1.
<ROOSSFLDTF>-POSIT = 1.
<ROOSSFLDTF>-FIELDNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROOSSFLDTF-KEYFLAG, sy-vline,
  WA_ROOSSFLDTF-SELECTION, sy-vline,
  WA_ROOSSFLDTF-DOMNAME, sy-vline,
  WA_ROOSSFLDTF-INTTYPE, sy-vline,
  WA_ROOSSFLDTF-INTLEN, sy-vline,
  WA_ROOSSFLDTF-REFFIELD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROOSSFLDTF 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_ROOSSFLDTF 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_ROOSSFLDTF INTO WA_ROOSSFLDTF.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_ROOSSFLDTF-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROOSSFLDTF-DATATYPE.
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_ROOSSFLDTF_STR, 
OLTPSOURCE TYPE STRING,
OBJVERS TYPE STRING,
SEGID TYPE STRING,
POSIT TYPE STRING,
FIELDNM TYPE STRING,
KEYFLAG TYPE STRING,
SELECTION TYPE STRING,
DOMNAME TYPE STRING,
INTTYPE TYPE STRING,
INTLEN TYPE STRING,
REFFIELD TYPE STRING,
DATATYPE TYPE STRING,
DTELNM TYPE STRING,
LENG TYPE STRING,
CHECKTABLE TYPE STRING,
ROUTPUTLEN TYPE STRING,
DECIMALS TYPE STRING,
CONVEXIT TYPE STRING,
SEGID_N4 TYPE STRING,
ORIGIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROOSSFLDTF_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_ROOSSFLDTF_STR-OLTPSOURCE sy-vline 
WA_ROOSSFLDTF_STR-OBJVERS sy-vline 
WA_ROOSSFLDTF_STR-SEGID sy-vline 
WA_ROOSSFLDTF_STR-POSIT sy-vline 
WA_ROOSSFLDTF_STR-FIELDNM sy-vline 
WA_ROOSSFLDTF_STR-KEYFLAG sy-vline 
WA_ROOSSFLDTF_STR-SELECTION sy-vline 
WA_ROOSSFLDTF_STR-DOMNAME sy-vline 
WA_ROOSSFLDTF_STR-INTTYPE sy-vline 
WA_ROOSSFLDTF_STR-INTLEN sy-vline 
WA_ROOSSFLDTF_STR-REFFIELD sy-vline 
WA_ROOSSFLDTF_STR-DATATYPE sy-vline 
WA_ROOSSFLDTF_STR-DTELNM sy-vline 
WA_ROOSSFLDTF_STR-LENG sy-vline 
WA_ROOSSFLDTF_STR-CHECKTABLE sy-vline 
WA_ROOSSFLDTF_STR-ROUTPUTLEN sy-vline 
WA_ROOSSFLDTF_STR-DECIMALS sy-vline 
WA_ROOSSFLDTF_STR-CONVEXIT sy-vline 
WA_ROOSSFLDTF_STR-SEGID_N4 sy-vline 
WA_ROOSSFLDTF_STR-ORIGIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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