ABAP Select data from SAP table BSEGA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BSEGA
*  INTO TABLE @DATA(IT_BSEGA2).
*--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_BSEGA INDEX 1 INTO DATA(WA_BSEGA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BSEGA>-DMSOL = 1.
<BSEGA>-DMHAB = 1.
<BSEGA>-DMSHB = 1.
<BSEGA>-WRSOL = 1.
<BSEGA>-WRHAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BSEGA-WRSHB, sy-vline,
  WA_BSEGA-MDSHB, sy-vline,
  WA_BSEGA-MWSHB, sy-vline,
  WA_BSEGA-FDSHB, sy-vline,
  WA_BSEGA-BLSHB, sy-vline,
  WA_BSEGA-NETDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BSEGA 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_BSEGA 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_BSEGA INTO WA_BSEGA.


*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 DMSOL
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-DMSOL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-DMSOL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit AC132, internal->external for field DMSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-DMSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-DMSHB.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit AC132, internal->external for field WRSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-WRSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-WRSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field MDSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-MDSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-MDSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field MWSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-MWSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-MWSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field FDSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-FDSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-FDSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field BLSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-BLSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-BLSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BSEGA-GKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSEGA-GKONT.
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_BSEGA_STR, 
DMSOL TYPE STRING,
DMHAB TYPE STRING,
DMSHB TYPE STRING,
WRSOL TYPE STRING,
WRHAB TYPE STRING,
WRSHB TYPE STRING,
MDSHB TYPE STRING,
MWSHB TYPE STRING,
FDSHB TYPE STRING,
BLSHB TYPE STRING,
NETDT TYPE STRING,
SK1DT TYPE STRING,
SK2DT TYPE STRING,
MENSH TYPE STRING,
GKART TYPE STRING,
GKONT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BSEGA_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_BSEGA_STR-DMSOL sy-vline 
WA_BSEGA_STR-DMHAB sy-vline 
WA_BSEGA_STR-DMSHB sy-vline 
WA_BSEGA_STR-WRSOL sy-vline 
WA_BSEGA_STR-WRHAB sy-vline 
WA_BSEGA_STR-WRSHB sy-vline 
WA_BSEGA_STR-MDSHB sy-vline 
WA_BSEGA_STR-MWSHB sy-vline 
WA_BSEGA_STR-FDSHB sy-vline 
WA_BSEGA_STR-BLSHB sy-vline 
WA_BSEGA_STR-NETDT sy-vline 
WA_BSEGA_STR-SK1DT sy-vline 
WA_BSEGA_STR-SK2DT sy-vline 
WA_BSEGA_STR-MENSH sy-vline 
WA_BSEGA_STR-GKART sy-vline 
WA_BSEGA_STR-GKONT sy-vline      INTO ld_text SEPARATED BY SPACE.

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