ABAP Select data from SAP table VC2HL_S_VALUE_DETAIL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VC2HL_S_VALUE_DETAIL 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 VC2HL_S_VALUE_DETAIL. 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 VC2HL_S_VALUE_DETAIL 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_VC2HL_S_VALUE_DETAIL TYPE STANDARD TABLE OF VC2HL_S_VALUE_DETAIL,
      WA_VC2HL_S_VALUE_DETAIL TYPE VC2HL_S_VALUE_DETAIL,
      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: <VC2HL_S_VALUE_DETAIL> TYPE VC2HL_S_VALUE_DETAIL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VC2HL_S_VALUE_DETAIL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VC2HL_S_VALUE_DETAIL
  INTO TABLE IT_VC2HL_S_VALUE_DETAIL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VC2HL_S_VALUE_DETAIL
*  INTO TABLE @DATA(IT_VC2HL_S_VALUE_DETAIL2).
*--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_VC2HL_S_VALUE_DETAIL INDEX 1 INTO DATA(WA_VC2HL_S_VALUE_DETAIL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VC2HL_S_VALUE_DETAIL ASSIGNING <VC2HL_S_VALUE_DETAIL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VC2HL_S_VALUE_DETAIL>-ATINN = 1.
<VC2HL_S_VALUE_DETAIL>-ATWRT = 1.
<VC2HL_S_VALUE_DETAIL>-DEFAULT_VALUE = 1.
<VC2HL_S_VALUE_DETAIL>-LTXT_NAME = 1.
<VC2HL_S_VALUE_DETAIL>-DOKNR = 1.

ENDLOOP.

LOOP AT IT_VC2HL_S_VALUE_DETAIL INTO WA_VC2HL_S_VALUE_DETAIL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VC2HL_S_VALUE_DETAIL-DOKAR, sy-vline,
  WA_VC2HL_S_VALUE_DETAIL-DOKTL, sy-vline,
  WA_VC2HL_S_VALUE_DETAIL-DOKVR, sy-vline,
  WA_VC2HL_S_VALUE_DETAIL-DKTXT, sy-vline,
  WA_VC2HL_S_VALUE_DETAIL-KNOBJ, sy-vline,
  WA_VC2HL_S_VALUE_DETAIL-KNNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VC2HL_S_VALUE_DETAIL 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_VC2HL_S_VALUE_DETAIL 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_VC2HL_S_VALUE_DETAIL INTO WA_VC2HL_S_VALUE_DETAIL.


*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 ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_VC2HL_S_VALUE_DETAIL-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VC2HL_S_VALUE_DETAIL-ATINN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VC2HL_S_VALUE_DETAIL-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VC2HL_S_VALUE_DETAIL-DOKNR.
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_VC2HL_S_VALUE_DETAIL_STR, 
ATINN TYPE STRING,
ATWRT TYPE STRING,
DEFAULT_VALUE TYPE STRING,
LTXT_NAME TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
DKTXT TYPE STRING,
KNOBJ TYPE STRING,
KNNUM TYPE STRING,
KNNAM TYPE STRING,
KNKTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VC2HL_S_VALUE_DETAIL_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_VC2HL_S_VALUE_DETAIL_STR-ATINN sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-ATWRT sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-DEFAULT_VALUE sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-LTXT_NAME sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-DOKNR sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-DOKAR sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-DOKTL sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-DOKVR sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-DKTXT sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-KNOBJ sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-KNNUM sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-KNNAM sy-vline 
WA_VC2HL_S_VALUE_DETAIL_STR-KNKTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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