ABAP Select data from SAP table CUVTAB into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CUVTAB
*  INTO TABLE @DATA(IT_CUVTAB2).
*--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_CUVTAB INDEX 1 INTO DATA(WA_CUVTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CUVTAB>-MANDT = 1.
<CUVTAB>-VTINT = 1.
<CUVTAB>-VTNAM = 1.
<CUVTAB>-VTGRU = 1.
<CUVTAB>-VTSTA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CUVTAB-VTAUT_STRU, sy-vline,
  WA_CUVTAB-VTAUT_CONT, sy-vline,
  WA_CUVTAB-VTRTO_SIZE, sy-vline,
  WA_CUVTAB-VTRTO_REL, sy-vline,
  WA_CUVTAB-DBTAB_NAME, sy-vline,
  WA_CUVTAB-DBCON_ACTI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CUVTAB 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_CUVTAB 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_CUVTAB INTO WA_CUVTAB.


*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_CUVTAB_STR, 
MANDT TYPE STRING,
VTINT TYPE STRING,
VTNAM TYPE STRING,
VTGRU TYPE STRING,
VTSTA TYPE STRING,
VTAUT_STRU TYPE STRING,
VTAUT_CONT TYPE STRING,
VTRTO_SIZE TYPE STRING,
VTRTO_REL TYPE STRING,
DBTAB_NAME TYPE STRING,
DBCON_ACTI TYPE STRING,
VTPRP TYPE STRING,
VTDCT TYPE STRING,
PROC_MODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CUVTAB_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_CUVTAB_STR-MANDT sy-vline 
WA_CUVTAB_STR-VTINT sy-vline 
WA_CUVTAB_STR-VTNAM sy-vline 
WA_CUVTAB_STR-VTGRU sy-vline 
WA_CUVTAB_STR-VTSTA sy-vline 
WA_CUVTAB_STR-VTAUT_STRU sy-vline 
WA_CUVTAB_STR-VTAUT_CONT sy-vline 
WA_CUVTAB_STR-VTRTO_SIZE sy-vline 
WA_CUVTAB_STR-VTRTO_REL sy-vline 
WA_CUVTAB_STR-DBTAB_NAME sy-vline 
WA_CUVTAB_STR-DBCON_ACTI sy-vline 
WA_CUVTAB_STR-VTPRP sy-vline 
WA_CUVTAB_STR-VTDCT sy-vline 
WA_CUVTAB_STR-PROC_MODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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