ABAP Select data from SAP table V_LIKP_DG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_LIKP_DG
*  INTO TABLE @DATA(IT_V_LIKP_DG2).
*--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_V_LIKP_DG INDEX 1 INTO DATA(WA_V_LIKP_DG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_LIKP_DG>-MANDT = 1.
<V_LIKP_DG>-VBELN = 1.
<V_LIKP_DG>-ERNAM = 1.
<V_LIKP_DG>-ERDAT = 1.
<V_LIKP_DG>-VSTEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_LIKP_DG-VKORG, sy-vline,
  WA_V_LIKP_DG-LFART, sy-vline,
  WA_V_LIKP_DG-WADAT, sy-vline,
  WA_V_LIKP_DG-LDDAT, sy-vline,
  WA_V_LIKP_DG-TDDAT, sy-vline,
  WA_V_LIKP_DG-LFDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_LIKP_DG 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_V_LIKP_DG 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_V_LIKP_DG INTO WA_V_LIKP_DG.


*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_V_LIKP_DG-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LIKP_DG-VBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_LIKP_DG-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LIKP_DG-KUNAG.
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_V_LIKP_DG_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
VSTEL TYPE STRING,
VKORG TYPE STRING,
LFART TYPE STRING,
WADAT TYPE STRING,
LDDAT TYPE STRING,
TDDAT TYPE STRING,
LFDAT TYPE STRING,
KODAT TYPE STRING,
ABLAD TYPE STRING,
ROUTE TYPE STRING,
LIFSK TYPE STRING,
VBTYP TYPE STRING,
LPRIO TYPE STRING,
VSBED TYPE STRING,
KUNNR TYPE STRING,
KUNAG TYPE STRING,
LSTEL TYPE STRING,
VKBUR TYPE STRING,
LGNUM TYPE STRING,
TRATY TYPE STRING,
TRAID TYPE STRING,
LIFEX TYPE STRING,
AULWE TYPE STRING,
WERKS TYPE STRING,
LGTOR TYPE STRING,
XBLNR TYPE STRING,
CONT_DG TYPE STRING,
VSART TYPE STRING,
PRVBE TYPE STRING,
BEGRU TYPE STRING,
BORGR_GRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_LIKP_DG_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_V_LIKP_DG_STR-MANDT sy-vline 
WA_V_LIKP_DG_STR-VBELN sy-vline 
WA_V_LIKP_DG_STR-ERNAM sy-vline 
WA_V_LIKP_DG_STR-ERDAT sy-vline 
WA_V_LIKP_DG_STR-VSTEL sy-vline 
WA_V_LIKP_DG_STR-VKORG sy-vline 
WA_V_LIKP_DG_STR-LFART sy-vline 
WA_V_LIKP_DG_STR-WADAT sy-vline 
WA_V_LIKP_DG_STR-LDDAT sy-vline 
WA_V_LIKP_DG_STR-TDDAT sy-vline 
WA_V_LIKP_DG_STR-LFDAT sy-vline 
WA_V_LIKP_DG_STR-KODAT sy-vline 
WA_V_LIKP_DG_STR-ABLAD sy-vline 
WA_V_LIKP_DG_STR-ROUTE sy-vline 
WA_V_LIKP_DG_STR-LIFSK sy-vline 
WA_V_LIKP_DG_STR-VBTYP sy-vline 
WA_V_LIKP_DG_STR-LPRIO sy-vline 
WA_V_LIKP_DG_STR-VSBED sy-vline 
WA_V_LIKP_DG_STR-KUNNR sy-vline 
WA_V_LIKP_DG_STR-KUNAG sy-vline 
WA_V_LIKP_DG_STR-LSTEL sy-vline 
WA_V_LIKP_DG_STR-VKBUR sy-vline 
WA_V_LIKP_DG_STR-LGNUM sy-vline 
WA_V_LIKP_DG_STR-TRATY sy-vline 
WA_V_LIKP_DG_STR-TRAID sy-vline 
WA_V_LIKP_DG_STR-LIFEX sy-vline 
WA_V_LIKP_DG_STR-AULWE sy-vline 
WA_V_LIKP_DG_STR-WERKS sy-vline 
WA_V_LIKP_DG_STR-LGTOR sy-vline 
WA_V_LIKP_DG_STR-XBLNR sy-vline 
WA_V_LIKP_DG_STR-CONT_DG sy-vline 
WA_V_LIKP_DG_STR-VSART sy-vline 
WA_V_LIKP_DG_STR-PRVBE sy-vline 
WA_V_LIKP_DG_STR-BEGRU sy-vline 
WA_V_LIKP_DG_STR-BORGR_GRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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