ABAP Select data from SAP table BISEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BISEG
*  INTO TABLE @DATA(IT_BISEG2).
*--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_BISEG INDEX 1 INTO DATA(WA_BISEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BISEG>-MAPPE = 1.
<BISEG>-TCODE = 1.
<BISEG>-SOBKZ = 1.
<BISEG>-SPERR = 1.
<BISEG>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BISEG-XBLNI, sy-vline,
  WA_BISEG-ZLDAT, sy-vline,
  WA_BISEG-BLDAT, sy-vline,
  WA_BISEG-BUDAT, sy-vline,
  WA_BISEG-GIDAT, sy-vline,
  WA_BISEG-GJAHR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BISEG 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_BISEG 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_BISEG INTO WA_BISEG.


*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 IBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BISEG-IBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BISEG-IBLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BISEG-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BISEG-ERFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BISEG-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BISEG-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BISEG-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BISEG-KDAUF.
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_BISEG_STR, 
MAPPE TYPE STRING,
TCODE TYPE STRING,
SOBKZ TYPE STRING,
SPERR TYPE STRING,
WERKS TYPE STRING,
XBLNI TYPE STRING,
ZLDAT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
GIDAT TYPE STRING,
GJAHR TYPE STRING,
IBLNR TYPE STRING,
ZEILI TYPE STRING,
LGORT TYPE STRING,
NBLNR TYPE STRING,
XNULL TYPE STRING,
ERFME TYPE STRING,
ERFMG TYPE STRING,
BSTAR TYPE STRING,
CHARG TYPE STRING,
MATNR TYPE STRING,
ABWEI TYPE STRING,
LIFNR TYPE STRING,
EXVKW TYPE STRING,
KUNNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PS_PSP_PNR TYPE STRING,
GRUND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BISEG_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_BISEG_STR-MAPPE sy-vline 
WA_BISEG_STR-TCODE sy-vline 
WA_BISEG_STR-SOBKZ sy-vline 
WA_BISEG_STR-SPERR sy-vline 
WA_BISEG_STR-WERKS sy-vline 
WA_BISEG_STR-XBLNI sy-vline 
WA_BISEG_STR-ZLDAT sy-vline 
WA_BISEG_STR-BLDAT sy-vline 
WA_BISEG_STR-BUDAT sy-vline 
WA_BISEG_STR-GIDAT sy-vline 
WA_BISEG_STR-GJAHR sy-vline 
WA_BISEG_STR-IBLNR sy-vline 
WA_BISEG_STR-ZEILI sy-vline 
WA_BISEG_STR-LGORT sy-vline 
WA_BISEG_STR-NBLNR sy-vline 
WA_BISEG_STR-XNULL sy-vline 
WA_BISEG_STR-ERFME sy-vline 
WA_BISEG_STR-ERFMG sy-vline 
WA_BISEG_STR-BSTAR sy-vline 
WA_BISEG_STR-CHARG sy-vline 
WA_BISEG_STR-MATNR sy-vline 
WA_BISEG_STR-ABWEI sy-vline 
WA_BISEG_STR-LIFNR sy-vline 
WA_BISEG_STR-EXVKW sy-vline 
WA_BISEG_STR-KUNNR sy-vline 
WA_BISEG_STR-KDAUF sy-vline 
WA_BISEG_STR-KDPOS sy-vline 
WA_BISEG_STR-PS_PSP_PNR sy-vline 
WA_BISEG_STR-GRUND sy-vline      INTO ld_text SEPARATED BY SPACE.

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