ABAP Select data from SAP table CMM_VLOGP_H_KOMK 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_H_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 CMM_VLOGP_H_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 CMM_VLOGP_H_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_CMM_VLOGP_H_KOMK TYPE STANDARD TABLE OF CMM_VLOGP_H_KOMK,
      WA_CMM_VLOGP_H_KOMK TYPE CMM_VLOGP_H_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: <CMM_VLOGP_H_KOMK> TYPE CMM_VLOGP_H_KOMK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMM_VLOGP_H_KOMK
*  INTO TABLE @DATA(IT_CMM_VLOGP_H_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_CMM_VLOGP_H_KOMK INDEX 1 INTO DATA(WA_CMM_VLOGP_H_KOMK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMM_VLOGP_H_KOMK>-BELNR = 1.
<CMM_VLOGP_H_KOMK>-VKORG = 1.
<CMM_VLOGP_H_KOMK>-VTWEG = 1.
<CMM_VLOGP_H_KOMK>-BZIRK = 1.
<CMM_VLOGP_H_KOMK>-VKGRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMM_VLOGP_H_KOMK-BRSCH, sy-vline,
  WA_CMM_VLOGP_H_KOMK-VKBUR, sy-vline,
  WA_CMM_VLOGP_H_KOMK-ALAND, sy-vline,
  WA_CMM_VLOGP_H_KOMK-BUKRS, sy-vline,
  WA_CMM_VLOGP_H_KOMK-GSBER, sy-vline,
  WA_CMM_VLOGP_H_KOMK-WAERK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMM_VLOGP_H_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_CMM_VLOGP_H_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_CMM_VLOGP_H_KOMK INTO WA_CMM_VLOGP_H_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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_H_KOMK-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_H_KOMK-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_H_KOMK-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_H_KOMK-LIFNR.
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_H_KOMK_STR, 
BELNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
BZIRK TYPE STRING,
VKGRP TYPE STRING,
BRSCH TYPE STRING,
VKBUR TYPE STRING,
ALAND TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
WAERK TYPE STRING,
KUNNR TYPE STRING,
KUNWE TYPE STRING,
LIFNR TYPE STRING,
KAPPL TYPE STRING,
KALSM TYPE STRING,
ERDAT TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
LAND1 TYPE STRING,
EKORG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMM_VLOGP_H_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_CMM_VLOGP_H_KOMK_STR-BELNR sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-VKORG sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-VTWEG sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-BZIRK sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-VKGRP sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-BRSCH sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-VKBUR sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-ALAND sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-BUKRS sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-GSBER sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-WAERK sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-KUNNR sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-KUNWE sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-LIFNR sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-KAPPL sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-KALSM sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-ERDAT sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-INCO1 sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-INCO2 sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-LAND1 sy-vline 
WA_CMM_VLOGP_H_KOMK_STR-EKORG sy-vline      INTO ld_text SEPARATED BY SPACE.

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