ABAP Select data from SAP table VDICS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VDICS
*  INTO TABLE @DATA(IT_VDICS2).
*--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_VDICS INDEX 1 INTO DATA(WA_VDICS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VDICS>-SELKZ = 1.
<VDICS>-VBELN = 1.
<VDICS>-POSNR = 1.
<VDICS>-ARKTX = 1.
<VDICS>-ORFMNG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VDICS-FKIMG, sy-vline,
  WA_VDICS-GESMNG, sy-vline,
  WA_VDICS-VRKME, sy-vline,
  WA_VDICS-CHGAM, sy-vline,
  WA_VDICS-FKDAT, sy-vline,
  WA_VDICS-PSTYV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VDICS 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_VDICS 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_VDICS INTO WA_VDICS.


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

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

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

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

*Conversion exit CUNIT, internal->external for field /CWM/MEINS_O
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VDICS-/CWM/MEINS_O
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VDICS-/CWM/MEINS_O.
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_VDICS_STR, 
SELKZ TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
ARKTX TYPE STRING,
ORFMNG TYPE STRING,
FKIMG TYPE STRING,
GESMNG TYPE STRING,
VRKME TYPE STRING,
CHGAM TYPE STRING,
FKDAT TYPE STRING,
PSTYV TYPE STRING,
MATNR TYPE STRING,
VBTYP TYPE STRING,
/CWM/MENGE TYPE STRING,
/CWM/MEINS TYPE STRING,
/CWM/MENGE_O TYPE STRING,
/CWM/MEINS_O TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VDICS_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_VDICS_STR-SELKZ sy-vline 
WA_VDICS_STR-VBELN sy-vline 
WA_VDICS_STR-POSNR sy-vline 
WA_VDICS_STR-ARKTX sy-vline 
WA_VDICS_STR-ORFMNG sy-vline 
WA_VDICS_STR-FKIMG sy-vline 
WA_VDICS_STR-GESMNG sy-vline 
WA_VDICS_STR-VRKME sy-vline 
WA_VDICS_STR-CHGAM sy-vline 
WA_VDICS_STR-FKDAT sy-vline 
WA_VDICS_STR-PSTYV sy-vline 
WA_VDICS_STR-MATNR sy-vline 
WA_VDICS_STR-VBTYP sy-vline 
WA_VDICS_STR-/CWM/MENGE sy-vline 
WA_VDICS_STR-/CWM/MEINS sy-vline 
WA_VDICS_STR-/CWM/MENGE_O sy-vline 
WA_VDICS_STR-/CWM/MEINS_O sy-vline      INTO ld_text SEPARATED BY SPACE.

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