ABAP Select data from SAP table VDSTAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VDSTAT
*  INTO TABLE @DATA(IT_VDSTAT2).
*--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_VDSTAT INDEX 1 INTO DATA(WA_VDSTAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VDSTAT>-BUKRS = 1.
<VDSTAT>-RANL = 1.
<VDSTAT>-SAUSZ = 1.
<VDSTAT>-SSOLLK = 1.
<VDSTAT>-SEINZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VDSTAT-DAART, sy-vline,
  WA_VDSTAT-DATYP, sy-vline,
  WA_VDSTAT-RERF, sy-vline,
  WA_VDSTAT-DERF, sy-vline,
  WA_VDSTAT-TERF, sy-vline,
  WA_VDSTAT-AKTIVK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VDSTAT 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_VDSTAT 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_VDSTAT INTO WA_VDSTAT.


*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 RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VDSTAT-RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VDSTAT-RANL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DEBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VDSTAT-DEBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VDSTAT-DEBNR.
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_VDSTAT_STR, 
BUKRS TYPE STRING,
RANL TYPE STRING,
SAUSZ TYPE STRING,
SSOLLK TYPE STRING,
SEINZ TYPE STRING,
DAART TYPE STRING,
DATYP TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
AKTIVK TYPE STRING,
DEBNR TYPE STRING,
AUSFK TYPE STRING,
AKT_USER TYPE STRING,
SPROLK TYPE STRING,
PEFFZINS TYPE STRING,
SAUSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VDSTAT_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_VDSTAT_STR-BUKRS sy-vline 
WA_VDSTAT_STR-RANL sy-vline 
WA_VDSTAT_STR-SAUSZ sy-vline 
WA_VDSTAT_STR-SSOLLK sy-vline 
WA_VDSTAT_STR-SEINZ sy-vline 
WA_VDSTAT_STR-DAART sy-vline 
WA_VDSTAT_STR-DATYP sy-vline 
WA_VDSTAT_STR-RERF sy-vline 
WA_VDSTAT_STR-DERF sy-vline 
WA_VDSTAT_STR-TERF sy-vline 
WA_VDSTAT_STR-AKTIVK sy-vline 
WA_VDSTAT_STR-DEBNR sy-vline 
WA_VDSTAT_STR-AUSFK sy-vline 
WA_VDSTAT_STR-AKT_USER sy-vline 
WA_VDSTAT_STR-SPROLK sy-vline 
WA_VDSTAT_STR-PEFFZINS sy-vline 
WA_VDSTAT_STR-SAUSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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