ABAP Select data from SAP table CMP_VBFS_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMP_VBFS_EXT
*  INTO TABLE @DATA(IT_CMP_VBFS_EXT2).
*--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_CMP_VBFS_EXT INDEX 1 INTO DATA(WA_CMP_VBFS_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMP_VBFS_EXT>-MANDT = 1.
<CMP_VBFS_EXT>-DATUM = 1.
<CMP_VBFS_EXT>-ZEIT = 1.
<CMP_VBFS_EXT>-NUMMER = 1.
<CMP_VBFS_EXT>-HINTERG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMP_VBFS_EXT-MSGID, sy-vline,
  WA_CMP_VBFS_EXT-MSGNO, sy-vline,
  WA_CMP_VBFS_EXT-MSGTY, sy-vline,
  WA_CMP_VBFS_EXT-MESSAGE, sy-vline,
  WA_CMP_VBFS_EXT-MSGV1, sy-vline,
  WA_CMP_VBFS_EXT-MSGV2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMP_VBFS_EXT 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_CMP_VBFS_EXT 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_CMP_VBFS_EXT INTO WA_CMP_VBFS_EXT.


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

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

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

*Conversion exit ALPHA, internal->external for field SAMMG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMP_VBFS_EXT-SAMMG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMP_VBFS_EXT-SAMMG.
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_CMP_VBFS_EXT_STR, 
MANDT TYPE STRING,
DATUM TYPE STRING,
ZEIT TYPE STRING,
NUMMER TYPE STRING,
HINTERG TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MESSAGE TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
CMP_KUNAG TYPE STRING,
CMP_MATNR TYPE STRING,
UNAME TYPE STRING,
CMP_RET TYPE STRING,
LIGHT TYPE STRING,
VBELN TYPE STRING,
SAMMG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMP_VBFS_EXT_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_CMP_VBFS_EXT_STR-MANDT sy-vline 
WA_CMP_VBFS_EXT_STR-DATUM sy-vline 
WA_CMP_VBFS_EXT_STR-ZEIT sy-vline 
WA_CMP_VBFS_EXT_STR-NUMMER sy-vline 
WA_CMP_VBFS_EXT_STR-HINTERG sy-vline 
WA_CMP_VBFS_EXT_STR-MSGID sy-vline 
WA_CMP_VBFS_EXT_STR-MSGNO sy-vline 
WA_CMP_VBFS_EXT_STR-MSGTY sy-vline 
WA_CMP_VBFS_EXT_STR-MESSAGE sy-vline 
WA_CMP_VBFS_EXT_STR-MSGV1 sy-vline 
WA_CMP_VBFS_EXT_STR-MSGV2 sy-vline 
WA_CMP_VBFS_EXT_STR-MSGV3 sy-vline 
WA_CMP_VBFS_EXT_STR-MSGV4 sy-vline 
WA_CMP_VBFS_EXT_STR-CMP_KUNAG sy-vline 
WA_CMP_VBFS_EXT_STR-CMP_MATNR sy-vline 
WA_CMP_VBFS_EXT_STR-UNAME sy-vline 
WA_CMP_VBFS_EXT_STR-CMP_RET sy-vline 
WA_CMP_VBFS_EXT_STR-LIGHT sy-vline 
WA_CMP_VBFS_EXT_STR-VBELN sy-vline 
WA_CMP_VBFS_EXT_STR-SAMMG sy-vline      INTO ld_text SEPARATED BY SPACE.

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