ABAP Select data from SAP table KOMPCV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMPCV
*  INTO TABLE @DATA(IT_KOMPCV2).
*--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_KOMPCV INDEX 1 INTO DATA(WA_KOMPCV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMPCV>-WERKS = 1.
<KOMPCV>-KTGRM = 1.
<KOMPCV>-KSCHA = 1.
<KOMPCV>-KVSL1 = 1.
<KOMPCV>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMPCV-STUNR, sy-vline,
  WA_KOMPCV-KRUEK, sy-vline,
  WA_KOMPCV-SPART, sy-vline,
  WA_KOMPCV-CCINS, sy-vline,
  WA_KOMPCV-LOCID, sy-vline,
  WA_KOMPCV-MWSKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMPCV 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_KOMPCV 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_KOMPCV INTO WA_KOMPCV.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KOMPCV_STR, 
WERKS TYPE STRING,
KTGRM TYPE STRING,
KSCHA TYPE STRING,
KVSL1 TYPE STRING,
POSNR TYPE STRING,
STUNR TYPE STRING,
KRUEK TYPE STRING,
SPART TYPE STRING,
CCINS TYPE STRING,
LOCID TYPE STRING,
MWSKZ TYPE STRING,
BEMOT TYPE STRING,
CONTR_TYPE TYPE STRING,
PROCESS_VARIANT TYPE STRING,
PSTYV TYPE STRING,
PDUMMY TYPE STRING,
DUMMY_ACDTC_I_INCL_EEW_PS TYPE STRING,
J_1ISTCODE TYPE STRING,
J_1IFORMC1 TYPE STRING,
J_1IFORMC2 TYPE STRING,
J_3GLGSBER TYPE STRING,
J_3GLBUKRS TYPE STRING,
J_3GETYPA TYPE STRING,
J_3GBGSBER TYPE STRING,
J_3GBBUKRS TYPE STRING,
J_3GETYPE TYPE STRING,
J_3GEIFR TYPE STRING,
J_3GTPLKZ TYPE STRING,
J_3GBLTYP TYPE STRING,
J_3GLVART TYPE STRING,
J_3GKATGR1 TYPE STRING,
J_3GKATGR2 TYPE STRING,
POSKT TYPE STRING,
REFKT TYPE STRING,
RETPA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMPCV_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_KOMPCV_STR-WERKS sy-vline 
WA_KOMPCV_STR-KTGRM sy-vline 
WA_KOMPCV_STR-KSCHA sy-vline 
WA_KOMPCV_STR-KVSL1 sy-vline 
WA_KOMPCV_STR-POSNR sy-vline 
WA_KOMPCV_STR-STUNR sy-vline 
WA_KOMPCV_STR-KRUEK sy-vline 
WA_KOMPCV_STR-SPART sy-vline 
WA_KOMPCV_STR-CCINS sy-vline 
WA_KOMPCV_STR-LOCID sy-vline 
WA_KOMPCV_STR-MWSKZ sy-vline 
WA_KOMPCV_STR-BEMOT sy-vline 
WA_KOMPCV_STR-CONTR_TYPE sy-vline 
WA_KOMPCV_STR-PROCESS_VARIANT sy-vline 
WA_KOMPCV_STR-PSTYV sy-vline 
WA_KOMPCV_STR-PDUMMY sy-vline 
WA_KOMPCV_STR-DUMMY_ACDTC_I_INCL_EEW_PS sy-vline 
WA_KOMPCV_STR-J_1ISTCODE sy-vline 
WA_KOMPCV_STR-J_1IFORMC1 sy-vline 
WA_KOMPCV_STR-J_1IFORMC2 sy-vline 
WA_KOMPCV_STR-J_3GLGSBER sy-vline 
WA_KOMPCV_STR-J_3GLBUKRS sy-vline 
WA_KOMPCV_STR-J_3GETYPA sy-vline 
WA_KOMPCV_STR-J_3GBGSBER sy-vline 
WA_KOMPCV_STR-J_3GBBUKRS sy-vline 
WA_KOMPCV_STR-J_3GETYPE sy-vline 
WA_KOMPCV_STR-J_3GEIFR sy-vline 
WA_KOMPCV_STR-J_3GTPLKZ sy-vline 
WA_KOMPCV_STR-J_3GBLTYP sy-vline 
WA_KOMPCV_STR-J_3GLVART sy-vline 
WA_KOMPCV_STR-J_3GKATGR1 sy-vline 
WA_KOMPCV_STR-J_3GKATGR2 sy-vline 
WA_KOMPCV_STR-POSKT sy-vline 
WA_KOMPCV_STR-REFKT sy-vline 
WA_KOMPCV_STR-RETPA sy-vline      INTO ld_text SEPARATED BY SPACE.

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