ABAP Select data from SAP table /DSD/VC_VLP_TREE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP /DSD/VC_VLP_TREE 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 /DSD/VC_VLP_TREE. 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 /DSD/VC_VLP_TREE 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_/DSD/VC_VLP_TREE TYPE STANDARD TABLE OF /DSD/VC_VLP_TREE,
      WA_/DSD/VC_VLP_TREE TYPE /DSD/VC_VLP_TREE,
      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: </DSD/VC_VLP_TREE> TYPE /DSD/VC_VLP_TREE.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /DSD/VC_VLP_TREE
  INTO TABLE IT_/DSD/VC_VLP_TREE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /DSD/VC_VLP_TREE
*  INTO TABLE @DATA(IT_/DSD/VC_VLP_TREE2).
*--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_/DSD/VC_VLP_TREE INDEX 1 INTO DATA(WA_/DSD/VC_VLP_TREE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/DSD/VC_VLP_TREE ASSIGNING </DSD/VC_VLP_TREE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</DSD/VC_VLP_TREE>-ANRED = 1.
</DSD/VC_VLP_TREE>-NAME1 = 1.
</DSD/VC_VLP_TREE>-NAME2 = 1.
</DSD/VC_VLP_TREE>-STRAS = 1.
</DSD/VC_VLP_TREE>-PSTLZ = 1.

ENDLOOP.

LOOP AT IT_/DSD/VC_VLP_TREE INTO WA_/DSD/VC_VLP_TREE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/DSD/VC_VLP_TREE-ORT01, sy-vline,
  WA_/DSD/VC_VLP_TREE-TELF1, sy-vline,
  WA_/DSD/VC_VLP_TREE-TELFX, sy-vline,
  WA_/DSD/VC_VLP_TREE-REGIO, sy-vline,
  WA_/DSD/VC_VLP_TREE-LAND1, sy-vline,
  WA_/DSD/VC_VLP_TREE-SORTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/DSD/VC_VLP_TREE 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_/DSD/VC_VLP_TREE 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_/DSD/VC_VLP_TREE INTO WA_/DSD/VC_VLP_TREE.


*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 VLID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/VC_VLP_TREE-VLID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/VC_VLP_TREE-VLID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TSTRN, internal->external for field DURA
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/VC_VLP_TREE-DURA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/VC_VLP_TREE-DURA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field DTRVD
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/VC_VLP_TREE-DTRVD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/VC_VLP_TREE-DTRVD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field TRVD
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/VC_VLP_TREE-TRVD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/VC_VLP_TREE-TRVD.
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_/DSD/VC_VLP_TREE_STR, 
ANRED TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
STRAS TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
TELF1 TYPE STRING,
TELFX TYPE STRING,
REGIO TYPE STRING,
LAND1 TYPE STRING,
SORTL TYPE STRING,
MANDT TYPE STRING,
VLID TYPE STRING,
VLPOS TYPE STRING,
SEQU TYPE STRING,
KUNNR TYPE STRING,
DURA TYPE STRING,
DTRVD TYPE STRING,
TRVD TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPARTE TYPE STRING,
PARNR TYPE STRING,
ABLAD TYPE STRING,
FMORE TYPE STRING,
VANRED TYPE STRING,
VNAME1 TYPE STRING,
VNAME2 TYPE STRING,
VSTRAS TYPE STRING,
VPSTLZ TYPE STRING,
VORT TYPE STRING,
VREGIO TYPE STRING,
VLAND TYPE STRING,
TIMFR1 TYPE STRING,
TIMTO1 TYPE STRING,
TIMFR2 TYPE STRING,
TIMTO2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/DSD/VC_VLP_TREE_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_/DSD/VC_VLP_TREE_STR-ANRED sy-vline 
WA_/DSD/VC_VLP_TREE_STR-NAME1 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-NAME2 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-STRAS sy-vline 
WA_/DSD/VC_VLP_TREE_STR-PSTLZ sy-vline 
WA_/DSD/VC_VLP_TREE_STR-ORT01 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-TELF1 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-TELFX sy-vline 
WA_/DSD/VC_VLP_TREE_STR-REGIO sy-vline 
WA_/DSD/VC_VLP_TREE_STR-LAND1 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-SORTL sy-vline 
WA_/DSD/VC_VLP_TREE_STR-MANDT sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VLID sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VLPOS sy-vline 
WA_/DSD/VC_VLP_TREE_STR-SEQU sy-vline 
WA_/DSD/VC_VLP_TREE_STR-KUNNR sy-vline 
WA_/DSD/VC_VLP_TREE_STR-DURA sy-vline 
WA_/DSD/VC_VLP_TREE_STR-DTRVD sy-vline 
WA_/DSD/VC_VLP_TREE_STR-TRVD sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VKORG sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VTWEG sy-vline 
WA_/DSD/VC_VLP_TREE_STR-SPARTE sy-vline 
WA_/DSD/VC_VLP_TREE_STR-PARNR sy-vline 
WA_/DSD/VC_VLP_TREE_STR-ABLAD sy-vline 
WA_/DSD/VC_VLP_TREE_STR-FMORE sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VANRED sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VNAME1 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VNAME2 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VSTRAS sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VPSTLZ sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VORT sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VREGIO sy-vline 
WA_/DSD/VC_VLP_TREE_STR-VLAND sy-vline 
WA_/DSD/VC_VLP_TREE_STR-TIMFR1 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-TIMTO1 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-TIMFR2 sy-vline 
WA_/DSD/VC_VLP_TREE_STR-TIMTO2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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