ABAP Select data from SAP table TDS_VEDA_COMV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_VEDA_COMV
*  INTO TABLE @DATA(IT_TDS_VEDA_COMV2).
*--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_TDS_VEDA_COMV INDEX 1 INTO DATA(WA_TDS_VEDA_COMV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_VEDA_COMV>-HANDLE = 1.
<TDS_VEDA_COMV>-VBEGDAT = 1.
<TDS_VEDA_COMV>-VENDDAT = 1.
<TDS_VEDA_COMV>-VBEGREG = 1.
<TDS_VEDA_COMV>-VENDREG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_VEDA_COMV-VLAUFK, sy-vline,
  WA_TDS_VEDA_COMV-VLAUFZ, sy-vline,
  WA_TDS_VEDA_COMV-VLAUEZ, sy-vline,
  WA_TDS_VEDA_COMV-VINSDAT, sy-vline,
  WA_TDS_VEDA_COMV-VABNDAT, sy-vline,
  WA_TDS_VEDA_COMV-VUNTDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_VEDA_COMV 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_TDS_VEDA_COMV 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_TDS_VEDA_COMV INTO WA_TDS_VEDA_COMV.


*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_TDS_VEDA_COMV_STR, 
HANDLE TYPE STRING,
VBEGDAT TYPE STRING,
VENDDAT TYPE STRING,
VBEGREG TYPE STRING,
VENDREG TYPE STRING,
VLAUFK TYPE STRING,
VLAUFZ TYPE STRING,
VLAUEZ TYPE STRING,
VINSDAT TYPE STRING,
VABNDAT TYPE STRING,
VUNTDAT TYPE STRING,
VDEMDAT TYPE STRING,
VAKTSCH TYPE STRING,
VASDA TYPE STRING,
VASDR TYPE STRING,
VKUESCH TYPE STRING,
VKUEGRU TYPE STRING,
VEINDAT TYPE STRING,
VWUNDAT TYPE STRING,
VBELKUE TYPE STRING,
VKUEPAR TYPE STRING,
VBEDKUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_VEDA_COMV_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_TDS_VEDA_COMV_STR-HANDLE sy-vline 
WA_TDS_VEDA_COMV_STR-VBEGDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VENDDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VBEGREG sy-vline 
WA_TDS_VEDA_COMV_STR-VENDREG sy-vline 
WA_TDS_VEDA_COMV_STR-VLAUFK sy-vline 
WA_TDS_VEDA_COMV_STR-VLAUFZ sy-vline 
WA_TDS_VEDA_COMV_STR-VLAUEZ sy-vline 
WA_TDS_VEDA_COMV_STR-VINSDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VABNDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VUNTDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VDEMDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VAKTSCH sy-vline 
WA_TDS_VEDA_COMV_STR-VASDA sy-vline 
WA_TDS_VEDA_COMV_STR-VASDR sy-vline 
WA_TDS_VEDA_COMV_STR-VKUESCH sy-vline 
WA_TDS_VEDA_COMV_STR-VKUEGRU sy-vline 
WA_TDS_VEDA_COMV_STR-VEINDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VWUNDAT sy-vline 
WA_TDS_VEDA_COMV_STR-VBELKUE sy-vline 
WA_TDS_VEDA_COMV_STR-VKUEPAR sy-vline 
WA_TDS_VEDA_COMV_STR-VBEDKUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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