ABAP Select data from SAP table CVDESIOT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVDESIOT
*  INTO TABLE @DATA(IT_CVDESIOT2).
*--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_CVDESIOT INDEX 1 INTO DATA(WA_CVDESIOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CVDESIOT>-MANDT = 1.
<CVDESIOT>-USEXTYP = 1.
<CVDESIOT>-USEXNAM = 1.
<CVDESIOT>-OBJTYPE = 1.
<CVDESIOT>-FBNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVDESIOT-ORD, sy-vline,
  WA_CVDESIOT-MARKFLG, sy-vline,
  WA_CVDESIOT-SELEFLG, sy-vline,
  WA_CVDESIOT-LINENO, sy-vline,
  WA_CVDESIOT-LINEMOD, sy-vline,
  WA_CVDESIOT-CHCOFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVDESIOT 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_CVDESIOT 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_CVDESIOT INTO WA_CVDESIOT.


*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_CVDESIOT_STR, 
MANDT TYPE STRING,
USEXTYP TYPE STRING,
USEXNAM TYPE STRING,
OBJTYPE TYPE STRING,
FBNAM TYPE STRING,
ORD TYPE STRING,
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
USEXDES TYPE STRING,
BUTTON TYPE STRING,
PARFUNNAM TYPE STRING,
CMDFUNNAM TYPE STRING,
PAREXIFLG TYPE STRING,
PARPREFLG TYPE STRING,
HEADDATFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVDESIOT_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_CVDESIOT_STR-MANDT sy-vline 
WA_CVDESIOT_STR-USEXTYP sy-vline 
WA_CVDESIOT_STR-USEXNAM sy-vline 
WA_CVDESIOT_STR-OBJTYPE sy-vline 
WA_CVDESIOT_STR-FBNAM sy-vline 
WA_CVDESIOT_STR-ORD sy-vline 
WA_CVDESIOT_STR-MARKFLG sy-vline 
WA_CVDESIOT_STR-SELEFLG sy-vline 
WA_CVDESIOT_STR-LINENO sy-vline 
WA_CVDESIOT_STR-LINEMOD sy-vline 
WA_CVDESIOT_STR-CHCOFLG sy-vline 
WA_CVDESIOT_STR-LOCKMOD sy-vline 
WA_CVDESIOT_STR-INTRFLG sy-vline 
WA_CVDESIOT_STR-USEXDES sy-vline 
WA_CVDESIOT_STR-BUTTON sy-vline 
WA_CVDESIOT_STR-PARFUNNAM sy-vline 
WA_CVDESIOT_STR-CMDFUNNAM sy-vline 
WA_CVDESIOT_STR-PAREXIFLG sy-vline 
WA_CVDESIOT_STR-PARPREFLG sy-vline 
WA_CVDESIOT_STR-HEADDATFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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