ABAP Select data from SAP table LBBIL_HD_KOMK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LBBIL_HD_KOMK
*  INTO TABLE @DATA(IT_LBBIL_HD_KOMK2).
*--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_LBBIL_HD_KOMK INDEX 1 INTO DATA(WA_LBBIL_HD_KOMK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LBBIL_HD_KOMK>-BIL_NUMBER = 1.
<LBBIL_HD_KOMK>-KNUMV = 1.
<LBBIL_HD_KOMK>-VKORG = 1.
<LBBIL_HD_KOMK>-VTWEG = 1.
<LBBIL_HD_KOMK>-SPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LBBIL_HD_KOMK-BZIRK, sy-vline,
  WA_LBBIL_HD_KOMK-VKGRP, sy-vline,
  WA_LBBIL_HD_KOMK-BRSCH, sy-vline,
  WA_LBBIL_HD_KOMK-VKBUR, sy-vline,
  WA_LBBIL_HD_KOMK-KONDA, sy-vline,
  WA_LBBIL_HD_KOMK-KDGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LBBIL_HD_KOMK 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_LBBIL_HD_KOMK 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_LBBIL_HD_KOMK INTO WA_LBBIL_HD_KOMK.


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

*Conversion exit EXCRT, internal->external for field KURRF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_LBBIL_HD_KOMK-KURRF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LBBIL_HD_KOMK-KURRF.
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_LBBIL_HD_KOMK_STR, 
BIL_NUMBER TYPE STRING,
KNUMV TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
BZIRK TYPE STRING,
VKGRP TYPE STRING,
BRSCH TYPE STRING,
VKBUR TYPE STRING,
KONDA TYPE STRING,
KDGRP TYPE STRING,
PLTYP TYPE STRING,
ALAND TYPE STRING,
WKREG TYPE STRING,
WKCOU TYPE STRING,
WKCTY TYPE STRING,
BUKRS TYPE STRING,
SUPOS TYPE STRING,
FKWRT TYPE STRING,
WAERK TYPE STRING,
HWAER TYPE STRING,
KURRF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LBBIL_HD_KOMK_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_LBBIL_HD_KOMK_STR-BIL_NUMBER sy-vline 
WA_LBBIL_HD_KOMK_STR-KNUMV sy-vline 
WA_LBBIL_HD_KOMK_STR-VKORG sy-vline 
WA_LBBIL_HD_KOMK_STR-VTWEG sy-vline 
WA_LBBIL_HD_KOMK_STR-SPART sy-vline 
WA_LBBIL_HD_KOMK_STR-BZIRK sy-vline 
WA_LBBIL_HD_KOMK_STR-VKGRP sy-vline 
WA_LBBIL_HD_KOMK_STR-BRSCH sy-vline 
WA_LBBIL_HD_KOMK_STR-VKBUR sy-vline 
WA_LBBIL_HD_KOMK_STR-KONDA sy-vline 
WA_LBBIL_HD_KOMK_STR-KDGRP sy-vline 
WA_LBBIL_HD_KOMK_STR-PLTYP sy-vline 
WA_LBBIL_HD_KOMK_STR-ALAND sy-vline 
WA_LBBIL_HD_KOMK_STR-WKREG sy-vline 
WA_LBBIL_HD_KOMK_STR-WKCOU sy-vline 
WA_LBBIL_HD_KOMK_STR-WKCTY sy-vline 
WA_LBBIL_HD_KOMK_STR-BUKRS sy-vline 
WA_LBBIL_HD_KOMK_STR-SUPOS sy-vline 
WA_LBBIL_HD_KOMK_STR-FKWRT sy-vline 
WA_LBBIL_HD_KOMK_STR-WAERK sy-vline 
WA_LBBIL_HD_KOMK_STR-HWAER sy-vline 
WA_LBBIL_HD_KOMK_STR-KURRF sy-vline      INTO ld_text SEPARATED BY SPACE.

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