ABAP Select data from SAP table VDHOKO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VDHOKO
*  INTO TABLE @DATA(IT_VDHOKO2).
*--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_VDHOKO INDEX 1 INTO DATA(WA_VDHOKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VDHOKO>-MANDT = 1.
<VDHOKO>-BUKRS = 1.
<VDHOKO>-STYP = 1.
<VDHOKO>-RHORD = 1.
<VDHOKO>-SVYM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VDHOKO-SVNR, sy-vline,
  WA_VDHOKO-RERF, sy-vline,
  WA_VDHOKO-DERF, sy-vline,
  WA_VDHOKO-TERF, sy-vline,
  WA_VDHOKO-REHER, sy-vline,
  WA_VDHOKO-RBEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VDHOKO 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_VDHOKO 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_VDHOKO INTO WA_VDHOKO.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_VDHOKO_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
STYP TYPE STRING,
RHORD TYPE STRING,
SVYM TYPE STRING,
SVNR TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
JBEARP TYPE STRING,
SVERT TYPE STRING,
SDED TYPE STRING,
SNBNR TYPE STRING,
BEGRU TYPE STRING,
PROCID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VDHOKO_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_VDHOKO_STR-MANDT sy-vline 
WA_VDHOKO_STR-BUKRS sy-vline 
WA_VDHOKO_STR-STYP sy-vline 
WA_VDHOKO_STR-RHORD sy-vline 
WA_VDHOKO_STR-SVYM sy-vline 
WA_VDHOKO_STR-SVNR sy-vline 
WA_VDHOKO_STR-RERF sy-vline 
WA_VDHOKO_STR-DERF sy-vline 
WA_VDHOKO_STR-TERF sy-vline 
WA_VDHOKO_STR-REHER sy-vline 
WA_VDHOKO_STR-RBEAR sy-vline 
WA_VDHOKO_STR-DBEAR sy-vline 
WA_VDHOKO_STR-TBEAR sy-vline 
WA_VDHOKO_STR-RBHER sy-vline 
WA_VDHOKO_STR-JBEARP sy-vline 
WA_VDHOKO_STR-SVERT sy-vline 
WA_VDHOKO_STR-SDED sy-vline 
WA_VDHOKO_STR-SNBNR sy-vline 
WA_VDHOKO_STR-BEGRU sy-vline 
WA_VDHOKO_STR-PROCID sy-vline      INTO ld_text SEPARATED BY SPACE.

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