ABAP Select data from SAP table FSUM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FSUM
*  INTO TABLE @DATA(IT_FSUM2).
*--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_FSUM INDEX 1 INTO DATA(WA_FSUM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FSUM>-GJAHR = 1.
<FSUM>-PERIO = 1.
<FSUM>-WRTTP = 1.
<FSUM>-WTEXT = 1.
<FSUM>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FSUM-BUTXT, sy-vline,
  WA_FSUM-GSBER, sy-vline,
  WA_FSUM-GTEXT, sy-vline,
  WA_FSUM-TWAER, sy-vline,
  WA_FSUM-TRBTR, sy-vline,
  WA_FSUM-FWAER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FSUM 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_FSUM 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_FSUM INTO WA_FSUM.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FSUM-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FSUM-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FSUM-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FSUM-WRTTP.
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_FSUM_STR, 
GJAHR TYPE STRING,
PERIO TYPE STRING,
WRTTP TYPE STRING,
WTEXT TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
GSBER TYPE STRING,
GTEXT TYPE STRING,
TWAER TYPE STRING,
TRBTR TYPE STRING,
FWAER TYPE STRING,
FKBTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FSUM_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_FSUM_STR-GJAHR sy-vline 
WA_FSUM_STR-PERIO sy-vline 
WA_FSUM_STR-WRTTP sy-vline 
WA_FSUM_STR-WTEXT sy-vline 
WA_FSUM_STR-BUKRS sy-vline 
WA_FSUM_STR-BUTXT sy-vline 
WA_FSUM_STR-GSBER sy-vline 
WA_FSUM_STR-GTEXT sy-vline 
WA_FSUM_STR-TWAER sy-vline 
WA_FSUM_STR-TRBTR sy-vline 
WA_FSUM_STR-FWAER sy-vline 
WA_FSUM_STR-FKBTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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