ABAP Select data from SAP table BSEG_FS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BSEG_FS
*  INTO TABLE @DATA(IT_BSEG_FS2).
*--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_BSEG_FS INDEX 1 INTO DATA(WA_BSEG_FS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BSEG_FS>-AUGBL = 1.
<BSEG_FS>-ZUONR = 1.
<BSEG_FS>-BSCHL = 1.
<BSEG_FS>-SHKZG = 1.
<BSEG_FS>-MWSKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BSEG_FS-DMBTR, sy-vline,
  WA_BSEG_FS-WRBTR, sy-vline,
  WA_BSEG_FS-AUFNR, sy-vline,
  WA_BSEG_FS-WERKS, sy-vline,
  WA_BSEG_FS-VALUT, sy-vline,
  WA_BSEG_FS-PROJK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BSEG_FS 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_BSEG_FS 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_BSEG_FS INTO WA_BSEG_FS.


*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 ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BSEG_FS-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEG_FS-AUGBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_BSEG_FS-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEG_FS-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_BSEG_FS-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEG_FS-WRBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BSEG_FS-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEG_FS-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJK
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_BSEG_FS-PROJK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEG_FS-PROJK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_BSEG_FS-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEG_FS-IMKEY.
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_BSEG_FS_STR, 
AUGBL TYPE STRING,
ZUONR TYPE STRING,
BSCHL TYPE STRING,
SHKZG TYPE STRING,
MWSKZ TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
AUFNR TYPE STRING,
WERKS TYPE STRING,
VALUT TYPE STRING,
PROJK TYPE STRING,
IMKEY TYPE STRING,
DABRZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BSEG_FS_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_BSEG_FS_STR-AUGBL sy-vline 
WA_BSEG_FS_STR-ZUONR sy-vline 
WA_BSEG_FS_STR-BSCHL sy-vline 
WA_BSEG_FS_STR-SHKZG sy-vline 
WA_BSEG_FS_STR-MWSKZ sy-vline 
WA_BSEG_FS_STR-DMBTR sy-vline 
WA_BSEG_FS_STR-WRBTR sy-vline 
WA_BSEG_FS_STR-AUFNR sy-vline 
WA_BSEG_FS_STR-WERKS sy-vline 
WA_BSEG_FS_STR-VALUT sy-vline 
WA_BSEG_FS_STR-PROJK sy-vline 
WA_BSEG_FS_STR-IMKEY sy-vline 
WA_BSEG_FS_STR-DABRZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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