ABAP Select data from SAP table KOMPBV3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KOMPBV3 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 KOMPBV3. 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 KOMPBV3 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_KOMPBV3 TYPE STANDARD TABLE OF KOMPBV3,
      WA_KOMPBV3 TYPE KOMPBV3,
      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: <KOMPBV3> TYPE KOMPBV3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KOMPBV3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KOMPBV3
  INTO TABLE IT_KOMPBV3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMPBV3
*  INTO TABLE @DATA(IT_KOMPBV32).
*--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_KOMPBV3 INDEX 1 INTO DATA(WA_KOMPBV32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KOMPBV3 ASSIGNING <KOMPBV3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMPBV3>-VBELN = 1.
<KOMPBV3>-VKORG = 1.
<KOMPBV3>-VTWEG = 1.
<KOMPBV3>-SPART = 1.
<KOMPBV3>-KDGRP = 1.

ENDLOOP.

LOOP AT IT_KOMPBV3 INTO WA_KOMPBV3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMPBV3-BZIRK, sy-vline,
  WA_KOMPBV3-PARVW, sy-vline,
  WA_KOMPBV3-PARNR, sy-vline,
  WA_KOMPBV3-KUNRG, sy-vline,
  WA_KOMPBV3-KUNAG, sy-vline,
  WA_KOMPBV3-KUNRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMPBV3 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_KOMPBV3 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_KOMPBV3 INTO WA_KOMPBV3.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPBV3-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPBV3-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_KOMPBV3-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPBV3-PARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPBV3-PARNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPBV3-PARNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPBV3-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPBV3-KUNRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPBV3-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPBV3-KUNAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPBV3-KUNRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPBV3-KUNRE.
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_KOMPBV3_STR, 
VBELN TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
KDGRP TYPE STRING,
BZIRK TYPE STRING,
PARVW TYPE STRING,
PARNR TYPE STRING,
KUNRG TYPE STRING,
KUNAG TYPE STRING,
KUNRE TYPE STRING,
INCO1 TYPE STRING,
EXPKZ TYPE STRING,
LAND1 TYPE STRING,
VSBED TYPE STRING,
ZTERM TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
FKART TYPE STRING,
FKTYP TYPE STRING,
VBTYP TYPE STRING,
TRTYP TYPE STRING,
DUMMY TYPE STRING,
IX_KOMK TYPE STRING,
IX_KOMT1_V TYPE STRING,
IX_KOMT1_B TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMPBV3_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_KOMPBV3_STR-VBELN sy-vline 
WA_KOMPBV3_STR-VKORG sy-vline 
WA_KOMPBV3_STR-VTWEG sy-vline 
WA_KOMPBV3_STR-SPART sy-vline 
WA_KOMPBV3_STR-KDGRP sy-vline 
WA_KOMPBV3_STR-BZIRK sy-vline 
WA_KOMPBV3_STR-PARVW sy-vline 
WA_KOMPBV3_STR-PARNR sy-vline 
WA_KOMPBV3_STR-KUNRG sy-vline 
WA_KOMPBV3_STR-KUNAG sy-vline 
WA_KOMPBV3_STR-KUNRE sy-vline 
WA_KOMPBV3_STR-INCO1 sy-vline 
WA_KOMPBV3_STR-EXPKZ sy-vline 
WA_KOMPBV3_STR-LAND1 sy-vline 
WA_KOMPBV3_STR-VSBED sy-vline 
WA_KOMPBV3_STR-ZTERM sy-vline 
WA_KOMPBV3_STR-NETWR sy-vline 
WA_KOMPBV3_STR-WAERK sy-vline 
WA_KOMPBV3_STR-FKART sy-vline 
WA_KOMPBV3_STR-FKTYP sy-vline 
WA_KOMPBV3_STR-VBTYP sy-vline 
WA_KOMPBV3_STR-TRTYP sy-vline 
WA_KOMPBV3_STR-DUMMY sy-vline 
WA_KOMPBV3_STR-IX_KOMK sy-vline 
WA_KOMPBV3_STR-IX_KOMT1_V sy-vline 
WA_KOMPBV3_STR-IX_KOMT1_B sy-vline      INTO ld_text SEPARATED BY SPACE.

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