ABAP Select data from SAP table QCVV into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QCVV 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 QCVV. 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 QCVV 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_QCVV TYPE STANDARD TABLE OF QCVV,
      WA_QCVV TYPE QCVV,
      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: <QCVV> TYPE QCVV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QCVV
*  INTO TABLE @DATA(IT_QCVV2).
*--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_QCVV INDEX 1 INTO DATA(WA_QCVV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QCVV>-MANDANT = 1.
<QCVV>-CTYP = 1.
<QCVV>-VORLNR = 1.
<QCVV>-VERSION = 1.
<QCVV>-VMKATEG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QCVV-MATNR, sy-vline,
  WA_QCVV-COUNTER, sy-vline,
  WA_QCVV-BLOCKNR, sy-vline,
  WA_QCVV-VMSORTNR, sy-vline,
  WA_QCVV-HERKUNFT, sy-vline,
  WA_QCVV-ART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QCVV 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_QCVV 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_QCVV INTO WA_QCVV.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_QCVV-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCVV-MATNR.
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_QCVV_STR, 
MANDANT TYPE STRING,
CTYP TYPE STRING,
VORLNR TYPE STRING,
VERSION TYPE STRING,
VMKATEG TYPE STRING,
MATNR TYPE STRING,
COUNTER TYPE STRING,
BLOCKNR TYPE STRING,
VMSORTNR TYPE STRING,
HERKUNFT TYPE STRING,
ART TYPE STRING,
KZGUTLOSE TYPE STRING,
MINQKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QCVV_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_QCVV_STR-MANDANT sy-vline 
WA_QCVV_STR-CTYP sy-vline 
WA_QCVV_STR-VORLNR sy-vline 
WA_QCVV_STR-VERSION sy-vline 
WA_QCVV_STR-VMKATEG sy-vline 
WA_QCVV_STR-MATNR sy-vline 
WA_QCVV_STR-COUNTER sy-vline 
WA_QCVV_STR-BLOCKNR sy-vline 
WA_QCVV_STR-VMSORTNR sy-vline 
WA_QCVV_STR-HERKUNFT sy-vline 
WA_QCVV_STR-ART sy-vline 
WA_QCVV_STR-KZGUTLOSE sy-vline 
WA_QCVV_STR-MINQKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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