ABAP Select data from SAP table /CWM/QM_COUNT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /CWM/QM_COUNT 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 /CWM/QM_COUNT. 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 /CWM/QM_COUNT 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_/CWM/QM_COUNT TYPE STANDARD TABLE OF /CWM/QM_COUNT,
      WA_/CWM/QM_COUNT TYPE /CWM/QM_COUNT,
      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: </CWM/QM_COUNT> TYPE /CWM/QM_COUNT.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /CWM/QM_COUNT
  INTO TABLE IT_/CWM/QM_COUNT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /CWM/QM_COUNT
*  INTO TABLE @DATA(IT_/CWM/QM_COUNT2).
*--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_/CWM/QM_COUNT INDEX 1 INTO DATA(WA_/CWM/QM_COUNT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/CWM/QM_COUNT ASSIGNING </CWM/QM_COUNT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</CWM/QM_COUNT>-MANDT = 1.
</CWM/QM_COUNT>-IBLNR = 1.
</CWM/QM_COUNT>-GJAHR = 1.
</CWM/QM_COUNT>-ZEILI = 1.
</CWM/QM_COUNT>-XQMSTOCK = 1.

ENDLOOP.

LOOP AT IT_/CWM/QM_COUNT INTO WA_/CWM/QM_COUNT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/CWM/QM_COUNT-PRUEFLOS, sy-vline,
  WA_/CWM/QM_COUNT-MENGE, sy-vline,
  WA_/CWM/QM_COUNT-MEINS, sy-vline,
  WA_/CWM/QM_COUNT-ERFMG, sy-vline,
  WA_/CWM/QM_COUNT-ERFME, sy-vline,
  WA_/CWM/QM_COUNT-BUCHM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/CWM/QM_COUNT 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_/CWM/QM_COUNT 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_/CWM/QM_COUNT INTO WA_/CWM/QM_COUNT.


*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 IBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/CWM/QM_COUNT-IBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CWM/QM_COUNT-IBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_/CWM/QM_COUNT-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CWM/QM_COUNT-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field /CWM/ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/CWM/QM_COUNT-/CWM/ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CWM/QM_COUNT-/CWM/ERFME.
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_/CWM/QM_COUNT_STR, 
MANDT TYPE STRING,
IBLNR TYPE STRING,
GJAHR TYPE STRING,
ZEILI TYPE STRING,
XQMSTOCK TYPE STRING,
PRUEFLOS TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
BUCHM TYPE STRING,
XNULL TYPE STRING,
/CWM/MENGE TYPE STRING,
/CWM/MEINS TYPE STRING,
/CWM/ERFMG TYPE STRING,
/CWM/ERFME TYPE STRING,
/CWM/BUCHM TYPE STRING,
/CWM/XNULL TYPE STRING,
XDIFF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/CWM/QM_COUNT_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_/CWM/QM_COUNT_STR-MANDT sy-vline 
WA_/CWM/QM_COUNT_STR-IBLNR sy-vline 
WA_/CWM/QM_COUNT_STR-GJAHR sy-vline 
WA_/CWM/QM_COUNT_STR-ZEILI sy-vline 
WA_/CWM/QM_COUNT_STR-XQMSTOCK sy-vline 
WA_/CWM/QM_COUNT_STR-PRUEFLOS sy-vline 
WA_/CWM/QM_COUNT_STR-MENGE sy-vline 
WA_/CWM/QM_COUNT_STR-MEINS sy-vline 
WA_/CWM/QM_COUNT_STR-ERFMG sy-vline 
WA_/CWM/QM_COUNT_STR-ERFME sy-vline 
WA_/CWM/QM_COUNT_STR-BUCHM sy-vline 
WA_/CWM/QM_COUNT_STR-XNULL sy-vline 
WA_/CWM/QM_COUNT_STR-/CWM/MENGE sy-vline 
WA_/CWM/QM_COUNT_STR-/CWM/MEINS sy-vline 
WA_/CWM/QM_COUNT_STR-/CWM/ERFMG sy-vline 
WA_/CWM/QM_COUNT_STR-/CWM/ERFME sy-vline 
WA_/CWM/QM_COUNT_STR-/CWM/BUCHM sy-vline 
WA_/CWM/QM_COUNT_STR-/CWM/XNULL sy-vline 
WA_/CWM/QM_COUNT_STR-XDIFF sy-vline      INTO ld_text SEPARATED BY SPACE.

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