ABAP Select data from SAP table BSEGH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BSEGH
*  INTO TABLE @DATA(IT_BSEGH2).
*--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_BSEGH INDEX 1 INTO DATA(WA_BSEGH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BSEGH>-SHKZG = 1.
<BSEGH>-DMBTR = 1.
<BSEGH>-WRBTR = 1.
<BSEGH>-MWSTS = 1.
<BSEGH>-WMWST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BSEGH-FDBTR, sy-vline,
  WA_BSEGH-BLNBT, sy-vline,
  WA_BSEGH-KOART, sy-vline,
  WA_BSEGH-UMSKS, sy-vline,
  WA_BSEGH-ZFBDT, sy-vline,
  WA_BSEGH-ANFAE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BSEGH 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_BSEGH 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_BSEGH INTO WA_BSEGH.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field REBZG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BSEGH-REBZG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGH-REBZG.
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_BSEGH_STR, 
SHKZG TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
MWSTS TYPE STRING,
WMWST TYPE STRING,
FDBTR TYPE STRING,
BLNBT TYPE STRING,
KOART TYPE STRING,
UMSKS TYPE STRING,
ZFBDT TYPE STRING,
ANFAE TYPE STRING,
ZBD1T TYPE STRING,
ZBD2T TYPE STRING,
ZBD3T TYPE STRING,
REBZG TYPE STRING,
MENGE TYPE STRING,
BLDAT TYPE STRING,
XNEGP TYPE STRING,
REBZT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BSEGH_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_BSEGH_STR-SHKZG sy-vline 
WA_BSEGH_STR-DMBTR sy-vline 
WA_BSEGH_STR-WRBTR sy-vline 
WA_BSEGH_STR-MWSTS sy-vline 
WA_BSEGH_STR-WMWST sy-vline 
WA_BSEGH_STR-FDBTR sy-vline 
WA_BSEGH_STR-BLNBT sy-vline 
WA_BSEGH_STR-KOART sy-vline 
WA_BSEGH_STR-UMSKS sy-vline 
WA_BSEGH_STR-ZFBDT sy-vline 
WA_BSEGH_STR-ANFAE sy-vline 
WA_BSEGH_STR-ZBD1T sy-vline 
WA_BSEGH_STR-ZBD2T sy-vline 
WA_BSEGH_STR-ZBD3T sy-vline 
WA_BSEGH_STR-REBZG sy-vline 
WA_BSEGH_STR-MENGE sy-vline 
WA_BSEGH_STR-BLDAT sy-vline 
WA_BSEGH_STR-XNEGP sy-vline 
WA_BSEGH_STR-REBZT sy-vline      INTO ld_text SEPARATED BY SPACE.

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