ABAP Select data from SAP table CMM_VLOGP_C_KONV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMM_VLOGP_C_KONV
*  INTO TABLE @DATA(IT_CMM_VLOGP_C_KONV2).
*--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_CMM_VLOGP_C_KONV INDEX 1 INTO DATA(WA_CMM_VLOGP_C_KONV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMM_VLOGP_C_KONV>-ZAEHK = 1.
<CMM_VLOGP_C_KONV>-KDATU = 1.
<CMM_VLOGP_C_KONV>-KRECH = 1.
<CMM_VLOGP_C_KONV>-KAWRT = 1.
<CMM_VLOGP_C_KONV>-KBETR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMM_VLOGP_C_KONV-KOEIN, sy-vline,
  WA_CMM_VLOGP_C_KONV-WAERS, sy-vline,
  WA_CMM_VLOGP_C_KONV-KPEIN, sy-vline,
  WA_CMM_VLOGP_C_KONV-KMEIN, sy-vline,
  WA_CMM_VLOGP_C_KONV-KWERT, sy-vline,
  WA_CMM_VLOGP_C_KONV-KUMZA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMM_VLOGP_C_KONV 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_CMM_VLOGP_C_KONV 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_CMM_VLOGP_C_KONV INTO WA_CMM_VLOGP_C_KONV.


*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 CUNIT, internal->external for field KMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_C_KONV-KMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_C_KONV-KMEIN.
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_CMM_VLOGP_C_KONV_STR, 
ZAEHK TYPE STRING,
KDATU TYPE STRING,
KRECH TYPE STRING,
KAWRT TYPE STRING,
KBETR TYPE STRING,
KOEIN TYPE STRING,
WAERS TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KWERT TYPE STRING,
KUMZA TYPE STRING,
KUMNE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMM_VLOGP_C_KONV_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_CMM_VLOGP_C_KONV_STR-ZAEHK sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KDATU sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KRECH sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KAWRT sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KBETR sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KOEIN sy-vline 
WA_CMM_VLOGP_C_KONV_STR-WAERS sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KPEIN sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KMEIN sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KWERT sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KUMZA sy-vline 
WA_CMM_VLOGP_C_KONV_STR-KUMNE sy-vline      INTO ld_text SEPARATED BY SPACE.

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