ABAP Select data from SAP table DMS_VEG_LOOKUP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMS_VEG_LOOKUP
*  INTO TABLE @DATA(IT_DMS_VEG_LOOKUP2).
*--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_DMS_VEG_LOOKUP INDEX 1 INTO DATA(WA_DMS_VEG_LOOKUP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMS_VEG_LOOKUP>-MANDT = 1.
<DMS_VEG_LOOKUP>-PDMGUID = 1.
<DMS_VEG_LOOKUP>-PDMDOCID = 1.
<DMS_VEG_LOOKUP>-PDMCONFIG = 1.
<DMS_VEG_LOOKUP>-PDMVERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMS_VEG_LOOKUP-PDMREPR, sy-vline,
  WA_DMS_VEG_LOOKUP-DOCNUMBER, sy-vline,
  WA_DMS_VEG_LOOKUP-DOCTYPE, sy-vline,
  WA_DMS_VEG_LOOKUP-DOCPART, sy-vline,
  WA_DMS_VEG_LOOKUP-DOCVERSION, sy-vline,
  WA_DMS_VEG_LOOKUP-PROSERVER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMS_VEG_LOOKUP 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_DMS_VEG_LOOKUP 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_DMS_VEG_LOOKUP INTO WA_DMS_VEG_LOOKUP.


*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 DOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DMS_VEG_LOOKUP-DOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMS_VEG_LOOKUP-DOCNUMBER.
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_DMS_VEG_LOOKUP_STR, 
MANDT TYPE STRING,
PDMGUID TYPE STRING,
PDMDOCID TYPE STRING,
PDMCONFIG TYPE STRING,
PDMVERSION TYPE STRING,
PDMREPR TYPE STRING,
DOCNUMBER TYPE STRING,
DOCTYPE TYPE STRING,
DOCPART TYPE STRING,
DOCVERSION TYPE STRING,
PROSERVER TYPE STRING,
PROCONTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMS_VEG_LOOKUP_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_DMS_VEG_LOOKUP_STR-MANDT sy-vline 
WA_DMS_VEG_LOOKUP_STR-PDMGUID sy-vline 
WA_DMS_VEG_LOOKUP_STR-PDMDOCID sy-vline 
WA_DMS_VEG_LOOKUP_STR-PDMCONFIG sy-vline 
WA_DMS_VEG_LOOKUP_STR-PDMVERSION sy-vline 
WA_DMS_VEG_LOOKUP_STR-PDMREPR sy-vline 
WA_DMS_VEG_LOOKUP_STR-DOCNUMBER sy-vline 
WA_DMS_VEG_LOOKUP_STR-DOCTYPE sy-vline 
WA_DMS_VEG_LOOKUP_STR-DOCPART sy-vline 
WA_DMS_VEG_LOOKUP_STR-DOCVERSION sy-vline 
WA_DMS_VEG_LOOKUP_STR-PROSERVER sy-vline 
WA_DMS_VEG_LOOKUP_STR-PROCONTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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