ABAP Select data from SAP table V_IDOC_WF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_IDOC_WF
*  INTO TABLE @DATA(IT_V_IDOC_WF2).
*--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_V_IDOC_WF INDEX 1 INTO DATA(WA_V_IDOC_WF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_IDOC_WF>-MANDT = 1.
<V_IDOC_WF>-DOCNUM = 1.
<V_IDOC_WF>-STATUS = 1.
<V_IDOC_WF>-MESTYP = 1.
<V_IDOC_WF>-SNDPRN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_IDOC_WF-SNDPRT, sy-vline,
  WA_V_IDOC_WF-SNDPFC, sy-vline,
  WA_V_IDOC_WF-MESCOD, sy-vline,
  WA_V_IDOC_WF-MESFCT, sy-vline,
  WA_V_IDOC_WF-TEST, sy-vline,
  WA_V_IDOC_WF-EVCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_IDOC_WF 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_V_IDOC_WF 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_V_IDOC_WF INTO WA_V_IDOC_WF.


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

*Conversion exit EDIPV, internal->external for field SNDPFC
CALL FUNCTION 'CONVERSION_EXIT_EDIPV_OUTPUT'
  EXPORTING
    input =                      WA_V_IDOC_WF-SNDPFC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_IDOC_WF-SNDPFC.
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_V_IDOC_WF_STR, 
MANDT TYPE STRING,
DOCNUM TYPE STRING,
STATUS TYPE STRING,
MESTYP TYPE STRING,
SNDPRN TYPE STRING,
SNDPRT TYPE STRING,
SNDPFC TYPE STRING,
MESCOD TYPE STRING,
MESFCT TYPE STRING,
TEST TYPE STRING,
EVCODE TYPE STRING,
FUNCNAME TYPE STRING,
MAXRETRIES TYPE STRING,
EVENT_TYPE TYPE STRING,
MASS_EVENT TYPE STRING,
PACKETOBJT TYPE STRING,
IDOCOBJTYP TYPE STRING,
APPLOBJTYP TYPE STRING,
EVENT_END TYPE STRING,
APPL_EVENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_IDOC_WF_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_V_IDOC_WF_STR-MANDT sy-vline 
WA_V_IDOC_WF_STR-DOCNUM sy-vline 
WA_V_IDOC_WF_STR-STATUS sy-vline 
WA_V_IDOC_WF_STR-MESTYP sy-vline 
WA_V_IDOC_WF_STR-SNDPRN sy-vline 
WA_V_IDOC_WF_STR-SNDPRT sy-vline 
WA_V_IDOC_WF_STR-SNDPFC sy-vline 
WA_V_IDOC_WF_STR-MESCOD sy-vline 
WA_V_IDOC_WF_STR-MESFCT sy-vline 
WA_V_IDOC_WF_STR-TEST sy-vline 
WA_V_IDOC_WF_STR-EVCODE sy-vline 
WA_V_IDOC_WF_STR-FUNCNAME sy-vline 
WA_V_IDOC_WF_STR-MAXRETRIES sy-vline 
WA_V_IDOC_WF_STR-EVENT_TYPE sy-vline 
WA_V_IDOC_WF_STR-MASS_EVENT sy-vline 
WA_V_IDOC_WF_STR-PACKETOBJT sy-vline 
WA_V_IDOC_WF_STR-IDOCOBJTYP sy-vline 
WA_V_IDOC_WF_STR-APPLOBJTYP sy-vline 
WA_V_IDOC_WF_STR-EVENT_END sy-vline 
WA_V_IDOC_WF_STR-APPL_EVENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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