ABAP Select data from SAP table CMM_VLOGP_KOMP 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_KOMP 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_KOMP. 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_KOMP 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_KOMP TYPE STANDARD TABLE OF CMM_VLOGP_KOMP,
      WA_CMM_VLOGP_KOMP TYPE CMM_VLOGP_KOMP,
      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_KOMP> TYPE CMM_VLOGP_KOMP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMM_VLOGP_KOMP
*  INTO TABLE @DATA(IT_CMM_VLOGP_KOMP2).
*--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_KOMP INDEX 1 INTO DATA(WA_CMM_VLOGP_KOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMM_VLOGP_KOMP>-ROOT_DOC_CHAR10 = 1.
<CMM_VLOGP_KOMP>-ROOT_DOC = 1.
<CMM_VLOGP_KOMP>-ROOT_DOC_TYPE = 1.
<CMM_VLOGP_KOMP>-ROOT_DOC_ITM = 1.
<CMM_VLOGP_KOMP>-PREDECESSOR_DOC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMM_VLOGP_KOMP-PREDECESSOR_DOC_TYPE, sy-vline,
  WA_CMM_VLOGP_KOMP-PREDECESSOR_DOC_ITM, sy-vline,
  WA_CMM_VLOGP_KOMP-DOCUMENT_ITEM, sy-vline,
  WA_CMM_VLOGP_KOMP-MATNR, sy-vline,
  WA_CMM_VLOGP_KOMP-CHARG, sy-vline,
  WA_CMM_VLOGP_KOMP-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMM_VLOGP_KOMP 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_KOMP 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_KOMP INTO WA_CMM_VLOGP_KOMP.


*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 ROOT_DOC_CHAR10
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_KOMP-ROOT_DOC_CHAR10
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_KOMP-ROOT_DOC_CHAR10.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_KOMP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_KOMP-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LAGME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_KOMP-LAGME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_KOMP-LAGME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_KOMP-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_KOMP-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VLOGP_KOMP-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VLOGP_KOMP-PRCTR.
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_KOMP_STR, 
ROOT_DOC_CHAR10 TYPE STRING,
ROOT_DOC TYPE STRING,
ROOT_DOC_TYPE TYPE STRING,
ROOT_DOC_ITM TYPE STRING,
PREDECESSOR_DOC TYPE STRING,
PREDECESSOR_DOC_TYPE TYPE STRING,
PREDECESSOR_DOC_ITM TYPE STRING,
DOCUMENT_ITEM TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
WERKS TYPE STRING,
MGLME TYPE STRING,
LAGME TYPE STRING,
MGAME TYPE STRING,
VRKME TYPE STRING,
SPART TYPE STRING,
PRCTR TYPE STRING,
MATKL TYPE STRING,
BWTAR TYPE STRING,
ROOT_EXT_NUMBER TYPE STRING,
PREDECESSOR_EXT_NUMBER TYPE STRING,
REALIZED TYPE STRING,
EXECUTED TYPE STRING,
COMPLETED TYPE STRING,
MGLME_ADJ TYPE STRING,
MGAME_ADJ TYPE STRING,
LGORT TYPE STRING,
STOCK_KEY_XML TYPE STRING,
STOCK_KEY TYPE STRING,
INTER_COMPANY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMM_VLOGP_KOMP_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_KOMP_STR-ROOT_DOC_CHAR10 sy-vline 
WA_CMM_VLOGP_KOMP_STR-ROOT_DOC sy-vline 
WA_CMM_VLOGP_KOMP_STR-ROOT_DOC_TYPE sy-vline 
WA_CMM_VLOGP_KOMP_STR-ROOT_DOC_ITM sy-vline 
WA_CMM_VLOGP_KOMP_STR-PREDECESSOR_DOC sy-vline 
WA_CMM_VLOGP_KOMP_STR-PREDECESSOR_DOC_TYPE sy-vline 
WA_CMM_VLOGP_KOMP_STR-PREDECESSOR_DOC_ITM sy-vline 
WA_CMM_VLOGP_KOMP_STR-DOCUMENT_ITEM sy-vline 
WA_CMM_VLOGP_KOMP_STR-MATNR sy-vline 
WA_CMM_VLOGP_KOMP_STR-CHARG sy-vline 
WA_CMM_VLOGP_KOMP_STR-WERKS sy-vline 
WA_CMM_VLOGP_KOMP_STR-MGLME sy-vline 
WA_CMM_VLOGP_KOMP_STR-LAGME sy-vline 
WA_CMM_VLOGP_KOMP_STR-MGAME sy-vline 
WA_CMM_VLOGP_KOMP_STR-VRKME sy-vline 
WA_CMM_VLOGP_KOMP_STR-SPART sy-vline 
WA_CMM_VLOGP_KOMP_STR-PRCTR sy-vline 
WA_CMM_VLOGP_KOMP_STR-MATKL sy-vline 
WA_CMM_VLOGP_KOMP_STR-BWTAR sy-vline 
WA_CMM_VLOGP_KOMP_STR-ROOT_EXT_NUMBER sy-vline 
WA_CMM_VLOGP_KOMP_STR-PREDECESSOR_EXT_NUMBER sy-vline 
WA_CMM_VLOGP_KOMP_STR-REALIZED sy-vline 
WA_CMM_VLOGP_KOMP_STR-EXECUTED sy-vline 
WA_CMM_VLOGP_KOMP_STR-COMPLETED sy-vline 
WA_CMM_VLOGP_KOMP_STR-MGLME_ADJ sy-vline 
WA_CMM_VLOGP_KOMP_STR-MGAME_ADJ sy-vline 
WA_CMM_VLOGP_KOMP_STR-LGORT sy-vline 
WA_CMM_VLOGP_KOMP_STR-STOCK_KEY_XML sy-vline 
WA_CMM_VLOGP_KOMP_STR-STOCK_KEY sy-vline 
WA_CMM_VLOGP_KOMP_STR-INTER_COMPANY sy-vline      INTO ld_text SEPARATED BY SPACE.

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