ABAP Select data from SAP table VSDD400000 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VSDD400000 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 VSDD400000. 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 VSDD400000 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_VSDD400000 TYPE STANDARD TABLE OF VSDD400000,
      WA_VSDD400000 TYPE VSDD400000,
      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: <VSDD400000> TYPE VSDD400000.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VSDD400000.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VSDD400000
  INTO TABLE IT_VSDD400000.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VSDD400000
*  INTO TABLE @DATA(IT_VSDD4000002).
*--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_VSDD400000 INDEX 1 INTO DATA(WA_VSDD4000002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VSDD400000 ASSIGNING <VSDD400000>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VSDD400000>-TYPENAME = 1.
<VSDD400000>-DDLANGUAGE = 1.
<VSDD400000>-ROWTYPE = 1.
<VSDD400000>-ROWKIND = 1.
<VSDD400000>-DATATYPE = 1.

ENDLOOP.

LOOP AT IT_VSDD400000 INTO WA_VSDD400000.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VSDD400000-LENG, sy-vline,
  WA_VSDD400000-DECIMALS, sy-vline,
  WA_VSDD400000-ACCESSMODE, sy-vline,
  WA_VSDD400000-KEYDEF, sy-vline,
  WA_VSDD400000-KEYKIND, sy-vline,
  WA_VSDD400000-KEYFDCOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VSDD400000 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_VSDD400000 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_VSDD400000 INTO WA_VSDD400000.


*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_VSDD400000_STR, 
TYPENAME TYPE STRING,
DDLANGUAGE TYPE STRING,
ROWTYPE TYPE STRING,
ROWKIND TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
ACCESSMODE TYPE STRING,
KEYDEF TYPE STRING,
KEYKIND TYPE STRING,
KEYFDCOUNT TYPE STRING,
GENERIC TYPE STRING,
AS4USER TYPE STRING,
AS4DATE TYPE STRING,
AS4TIME TYPE STRING,
DDTEXT TYPE STRING,
TYPELEN TYPE STRING,
ACTFLAG TYPE STRING,
TTYPKIND TYPE STRING,
RANGE_CTYP TYPE STRING,
CTDATATYPE TYPE STRING,
CTLENG TYPE STRING,
CTDECIMALS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VSDD400000_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_VSDD400000_STR-TYPENAME sy-vline 
WA_VSDD400000_STR-DDLANGUAGE sy-vline 
WA_VSDD400000_STR-ROWTYPE sy-vline 
WA_VSDD400000_STR-ROWKIND sy-vline 
WA_VSDD400000_STR-DATATYPE sy-vline 
WA_VSDD400000_STR-LENG sy-vline 
WA_VSDD400000_STR-DECIMALS sy-vline 
WA_VSDD400000_STR-ACCESSMODE sy-vline 
WA_VSDD400000_STR-KEYDEF sy-vline 
WA_VSDD400000_STR-KEYKIND sy-vline 
WA_VSDD400000_STR-KEYFDCOUNT sy-vline 
WA_VSDD400000_STR-GENERIC sy-vline 
WA_VSDD400000_STR-AS4USER sy-vline 
WA_VSDD400000_STR-AS4DATE sy-vline 
WA_VSDD400000_STR-AS4TIME sy-vline 
WA_VSDD400000_STR-DDTEXT sy-vline 
WA_VSDD400000_STR-TYPELEN sy-vline 
WA_VSDD400000_STR-ACTFLAG sy-vline 
WA_VSDD400000_STR-TTYPKIND sy-vline 
WA_VSDD400000_STR-RANGE_CTYP sy-vline 
WA_VSDD400000_STR-CTDATATYPE sy-vline 
WA_VSDD400000_STR-CTLENG sy-vline 
WA_VSDD400000_STR-CTDECIMALS sy-vline      INTO ld_text SEPARATED BY SPACE.

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