ABAP Select data from SAP table QCVM 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 QCVM 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 QCVM. 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 QCVM 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_QCVM TYPE STANDARD TABLE OF QCVM,
      WA_QCVM TYPE QCVM,
      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: <QCVM> TYPE QCVM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QCVM
*  INTO TABLE @DATA(IT_QCVM2).
*--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_QCVM INDEX 1 INTO DATA(WA_QCVM2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QCVM-MERKMALNR, sy-vline,
  WA_QCVM-SORTNR, sy-vline,
  WA_QCVM-TEXT_ELEM, sy-vline,
  WA_QCVM-KATEGORIE, sy-vline,
  WA_QCVM-ZAEHLER, sy-vline,
  WA_QCVM-MKMNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QCVM 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_QCVM 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_QCVM INTO WA_QCVM.


*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_QCVM-VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCVM-VERSION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MKMNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QCVM-MKMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCVM-MKMNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSIONMK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QCVM-VERSIONMK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCVM-VERSIONMK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field CMERKMALID
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_QCVM-CMERKMALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCVM-CMERKMALID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MASSEINHSW
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_QCVM-MASSEINHSW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCVM-MASSEINHSW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHARACT_ID1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QCVM-CHARACT_ID1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCVM-CHARACT_ID1.
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_QCVM_STR, 
MANDANT TYPE STRING,
CTYP TYPE STRING,
VORLNR TYPE STRING,
VERSION TYPE STRING,
BLOCKNR TYPE STRING,
MERKMALNR TYPE STRING,
SORTNR TYPE STRING,
TEXT_ELEM TYPE STRING,
KATEGORIE TYPE STRING,
ZAEHLER TYPE STRING,
MKMNR TYPE STRING,
VERSIONMK TYPE STRING,
CMERKMALID TYPE STRING,
KZHERKWERT TYPE STRING,
KZHERKTEXT TYPE STRING,
KZAUSGFMT TYPE STRING,
KZMETHODE TYPE STRING,
KZESEL TYPE STRING,
KZHERKVG TYPE STRING,
KZSTRSKIP TYPE STRING,
MASSEINHSW TYPE STRING,
AUSGLEN TYPE STRING,
STELLEN TYPE STRING,
KZEXPDS TYPE STRING,
KZOFFSPTX TYPE STRING,
KZOBL TYPE STRING,
VMSORTNR TYPE STRING,
COLUMNSORT TYPE STRING,
COLUMNS TYPE STRING,
UNITNRSORT TYPE STRING,
CHARACT_ID1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QCVM_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_QCVM_STR-MANDANT sy-vline 
WA_QCVM_STR-CTYP sy-vline 
WA_QCVM_STR-VORLNR sy-vline 
WA_QCVM_STR-VERSION sy-vline 
WA_QCVM_STR-BLOCKNR sy-vline 
WA_QCVM_STR-MERKMALNR sy-vline 
WA_QCVM_STR-SORTNR sy-vline 
WA_QCVM_STR-TEXT_ELEM sy-vline 
WA_QCVM_STR-KATEGORIE sy-vline 
WA_QCVM_STR-ZAEHLER sy-vline 
WA_QCVM_STR-MKMNR sy-vline 
WA_QCVM_STR-VERSIONMK sy-vline 
WA_QCVM_STR-CMERKMALID sy-vline 
WA_QCVM_STR-KZHERKWERT sy-vline 
WA_QCVM_STR-KZHERKTEXT sy-vline 
WA_QCVM_STR-KZAUSGFMT sy-vline 
WA_QCVM_STR-KZMETHODE sy-vline 
WA_QCVM_STR-KZESEL sy-vline 
WA_QCVM_STR-KZHERKVG sy-vline 
WA_QCVM_STR-KZSTRSKIP sy-vline 
WA_QCVM_STR-MASSEINHSW sy-vline 
WA_QCVM_STR-AUSGLEN sy-vline 
WA_QCVM_STR-STELLEN sy-vline 
WA_QCVM_STR-KZEXPDS sy-vline 
WA_QCVM_STR-KZOFFSPTX sy-vline 
WA_QCVM_STR-KZOBL sy-vline 
WA_QCVM_STR-VMSORTNR sy-vline 
WA_QCVM_STR-COLUMNSORT sy-vline 
WA_QCVM_STR-COLUMNS sy-vline 
WA_QCVM_STR-UNITNRSORT sy-vline 
WA_QCVM_STR-CHARACT_ID1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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