ABAP Select data from SAP table V_DSOURCE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_DSOURCE 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_DSOURCE. 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_DSOURCE 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_DSOURCE TYPE STANDARD TABLE OF V_DSOURCE,
      WA_V_DSOURCE TYPE V_DSOURCE,
      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_DSOURCE> TYPE V_DSOURCE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_DSOURCE
*  INTO TABLE @DATA(IT_V_DSOURCE2).
*--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_DSOURCE INDEX 1 INTO DATA(WA_V_DSOURCE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_DSOURCE>-OLTPSOURCE = 1.
<V_DSOURCE>-OBJVERS = 1.
<V_DSOURCE>-TYPE = 1.
<V_DSOURCE>-APPLNM = 1.
<V_DSOURCE>-BASOSOURCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_DSOURCE-DELTA, sy-vline,
  WA_V_DSOURCE-STOCKUPD, sy-vline,
  WA_V_DSOURCE-EXMETHOD, sy-vline,
  WA_V_DSOURCE-EXTRACTOR, sy-vline,
  WA_V_DSOURCE-EXSTRUCT, sy-vline,
  WA_V_DSOURCE-GENFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_DSOURCE 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_DSOURCE 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_DSOURCE INTO WA_V_DSOURCE.


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

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

*Conversion exit ALPHA, internal->external for field OBJECT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_DSOURCE-OBJECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_DSOURCE-OBJECT.
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_DSOURCE_STR, 
OLTPSOURCE TYPE STRING,
OBJVERS TYPE STRING,
TYPE TYPE STRING,
APPLNM TYPE STRING,
BASOSOURCE TYPE STRING,
DELTA TYPE STRING,
STOCKUPD TYPE STRING,
EXMETHOD TYPE STRING,
EXTRACTOR TYPE STRING,
EXSTRUCT TYPE STRING,
GENFLAG TYPE STRING,
VIRTCUBE TYPE STRING,
APPENDFLAG TYPE STRING,
TSTPNM TYPE STRING,
TSTPDAT TYPE STRING,
TSTPTIM TYPE STRING,
INVFIELD TYPE STRING,
TXTLG TYPE STRING,
FIELD TYPE STRING,
SELECTION TYPE STRING,
UNIFIELDNM TYPE STRING,
STORNO TYPE STRING,
F4TYPE TYPE STRING,
F4EXTRAKT TYPE STRING,
LANGU TYPE STRING,
OBJECT TYPE STRING,
TABNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_DSOURCE_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_DSOURCE_STR-OLTPSOURCE sy-vline 
WA_V_DSOURCE_STR-OBJVERS sy-vline 
WA_V_DSOURCE_STR-TYPE sy-vline 
WA_V_DSOURCE_STR-APPLNM sy-vline 
WA_V_DSOURCE_STR-BASOSOURCE sy-vline 
WA_V_DSOURCE_STR-DELTA sy-vline 
WA_V_DSOURCE_STR-STOCKUPD sy-vline 
WA_V_DSOURCE_STR-EXMETHOD sy-vline 
WA_V_DSOURCE_STR-EXTRACTOR sy-vline 
WA_V_DSOURCE_STR-EXSTRUCT sy-vline 
WA_V_DSOURCE_STR-GENFLAG sy-vline 
WA_V_DSOURCE_STR-VIRTCUBE sy-vline 
WA_V_DSOURCE_STR-APPENDFLAG sy-vline 
WA_V_DSOURCE_STR-TSTPNM sy-vline 
WA_V_DSOURCE_STR-TSTPDAT sy-vline 
WA_V_DSOURCE_STR-TSTPTIM sy-vline 
WA_V_DSOURCE_STR-INVFIELD sy-vline 
WA_V_DSOURCE_STR-TXTLG sy-vline 
WA_V_DSOURCE_STR-FIELD sy-vline 
WA_V_DSOURCE_STR-SELECTION sy-vline 
WA_V_DSOURCE_STR-UNIFIELDNM sy-vline 
WA_V_DSOURCE_STR-STORNO sy-vline 
WA_V_DSOURCE_STR-F4TYPE sy-vline 
WA_V_DSOURCE_STR-F4EXTRAKT sy-vline 
WA_V_DSOURCE_STR-LANGU sy-vline 
WA_V_DSOURCE_STR-OBJECT sy-vline 
WA_V_DSOURCE_STR-TABNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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