ABAP Select data from SAP table DD40VD into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DD40VD 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 DD40VD. 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 DD40VD 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_DD40VD TYPE STANDARD TABLE OF DD40VD,
      WA_DD40VD TYPE DD40VD,
      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: <DD40VD> TYPE DD40VD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DD40VD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DD40VD
  INTO TABLE IT_DD40VD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DD40VD
*  INTO TABLE @DATA(IT_DD40VD2).
*--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_DD40VD INDEX 1 INTO DATA(WA_DD40VD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DD40VD ASSIGNING <DD40VD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DD40VD>-TYPENAME = 1.
<DD40VD>-DDTEXT = 1.
<DD40VD>-DDLANGUAGE = 1.
<DD40VD>-TTYPKINTXT = 1.
<DD40VD>-TTYPKIND = 1.

ENDLOOP.

LOOP AT IT_DD40VD INTO WA_DD40VD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DD40VD-ROWKINDTXT, sy-vline,
  WA_DD40VD-ROWKIND, sy-vline,
  WA_DD40VD-REFTYPETXT, sy-vline,
  WA_DD40VD-REFTYPE, sy-vline,
  WA_DD40VD-ROWTYPE, sy-vline,
  WA_DD40VD-DATATYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DD40VD 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_DD40VD 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_DD40VD INTO WA_DD40VD.


*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 ISOLA, internal->external for field DDLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DD40VD-DDLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD40VD-DDLANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD40VD-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD40VD-DATATYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field CTDATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD40VD-CTDATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD40VD-CTDATATYPE.
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_DD40VD_STR, 
TYPENAME TYPE STRING,
DDTEXT TYPE STRING,
DDLANGUAGE TYPE STRING,
TTYPKINTXT TYPE STRING,
TTYPKIND TYPE STRING,
ROWKINDTXT TYPE STRING,
ROWKIND TYPE STRING,
REFTYPETXT TYPE STRING,
REFTYPE TYPE STRING,
ROWTYPE TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
TYPELEN TYPE STRING,
RANGE_CTYP TYPE STRING,
CTDATATYPE TYPE STRING,
CTLENG TYPE STRING,
CTDECIMALS TYPE STRING,
ACCMODETXT TYPE STRING,
ACCESSMODE TYPE STRING,
KEYDEFTXT TYPE STRING,
KEYDEF TYPE STRING,
KEYKINDTXT TYPE STRING,
KEYKIND TYPE STRING,
KEYFDCOUNT TYPE STRING,
GENERIC TYPE STRING,
OCCURS TYPE STRING,
PROXYTYPE TYPE STRING,
ALIAS TYPE STRING,
FURTHERSECKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DD40VD_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_DD40VD_STR-TYPENAME sy-vline 
WA_DD40VD_STR-DDTEXT sy-vline 
WA_DD40VD_STR-DDLANGUAGE sy-vline 
WA_DD40VD_STR-TTYPKINTXT sy-vline 
WA_DD40VD_STR-TTYPKIND sy-vline 
WA_DD40VD_STR-ROWKINDTXT sy-vline 
WA_DD40VD_STR-ROWKIND sy-vline 
WA_DD40VD_STR-REFTYPETXT sy-vline 
WA_DD40VD_STR-REFTYPE sy-vline 
WA_DD40VD_STR-ROWTYPE sy-vline 
WA_DD40VD_STR-DATATYPE sy-vline 
WA_DD40VD_STR-LENG sy-vline 
WA_DD40VD_STR-DECIMALS sy-vline 
WA_DD40VD_STR-TYPELEN sy-vline 
WA_DD40VD_STR-RANGE_CTYP sy-vline 
WA_DD40VD_STR-CTDATATYPE sy-vline 
WA_DD40VD_STR-CTLENG sy-vline 
WA_DD40VD_STR-CTDECIMALS sy-vline 
WA_DD40VD_STR-ACCMODETXT sy-vline 
WA_DD40VD_STR-ACCESSMODE sy-vline 
WA_DD40VD_STR-KEYDEFTXT sy-vline 
WA_DD40VD_STR-KEYDEF sy-vline 
WA_DD40VD_STR-KEYKINDTXT sy-vline 
WA_DD40VD_STR-KEYKIND sy-vline 
WA_DD40VD_STR-KEYFDCOUNT sy-vline 
WA_DD40VD_STR-GENERIC sy-vline 
WA_DD40VD_STR-OCCURS sy-vline 
WA_DD40VD_STR-PROXYTYPE sy-vline 
WA_DD40VD_STR-ALIAS sy-vline 
WA_DD40VD_STR-FURTHERSECKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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