ABAP Select data from SAP table CNMMQUANS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNMMQUANS
*  INTO TABLE @DATA(IT_CNMMQUANS2).
*--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_CNMMQUANS INDEX 1 INTO DATA(WA_CNMMQUANS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNMMQUANS>-RSNUM = 1.
<CNMMQUANS>-RSPOS = 1.
<CNMMQUANS>-RSART = 1.
<CNMMQUANS>-ICONS = 1.
<CNMMQUANS>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNMMQUANS-WERKS, sy-vline,
  WA_CNMMQUANS-MAKTX, sy-vline,
  WA_CNMMQUANS-AUDISP, sy-vline,
  WA_CNMMQUANS-BDMNG, sy-vline,
  WA_CNMMQUANS-ENMNG, sy-vline,
  WA_CNMMQUANS-VMENG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNMMQUANS 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_CNMMQUANS 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_CNMMQUANS INTO WA_CNMMQUANS.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CNMMQUANS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMQUANS-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINS_MSEG
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNMMQUANS-MEINS_MSEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMQUANS-MEINS_MSEG.
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_CNMMQUANS_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
ICONS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
MAKTX TYPE STRING,
AUDISP TYPE STRING,
BDMNG TYPE STRING,
ENMNG TYPE STRING,
VMENG TYPE STRING,
MEINS TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
EBAKZ TYPE STRING,
BSMNG TYPE STRING,
RFQ_EBELN TYPE STRING,
RFQ_EBELP TYPE STRING,
STATU TYPE STRING,
ABSKZ TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ELIKZ TYPE STRING,
EREKZ TYPE STRING,
MENGE_EKPO TYPE STRING,
MEINS_EKPO TYPE STRING,
XEKET TYPE STRING,
XEKES TYPE STRING,
XEKBE TYPE STRING,
VBELN TYPE STRING,
D_POSNR TYPE STRING,
LFIMG TYPE STRING,
MEINS_LIPS TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
SHKZG TYPE STRING,
BWART TYPE STRING,
MENGE_MSEG TYPE STRING,
MEINS_MSEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNMMQUANS_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_CNMMQUANS_STR-RSNUM sy-vline 
WA_CNMMQUANS_STR-RSPOS sy-vline 
WA_CNMMQUANS_STR-RSART sy-vline 
WA_CNMMQUANS_STR-ICONS sy-vline 
WA_CNMMQUANS_STR-MATNR sy-vline 
WA_CNMMQUANS_STR-WERKS sy-vline 
WA_CNMMQUANS_STR-MAKTX sy-vline 
WA_CNMMQUANS_STR-AUDISP sy-vline 
WA_CNMMQUANS_STR-BDMNG sy-vline 
WA_CNMMQUANS_STR-ENMNG sy-vline 
WA_CNMMQUANS_STR-VMENG sy-vline 
WA_CNMMQUANS_STR-MEINS sy-vline 
WA_CNMMQUANS_STR-BANFN sy-vline 
WA_CNMMQUANS_STR-BNFPO sy-vline 
WA_CNMMQUANS_STR-EBAKZ sy-vline 
WA_CNMMQUANS_STR-BSMNG sy-vline 
WA_CNMMQUANS_STR-RFQ_EBELN sy-vline 
WA_CNMMQUANS_STR-RFQ_EBELP sy-vline 
WA_CNMMQUANS_STR-STATU sy-vline 
WA_CNMMQUANS_STR-ABSKZ sy-vline 
WA_CNMMQUANS_STR-EBELN sy-vline 
WA_CNMMQUANS_STR-EBELP sy-vline 
WA_CNMMQUANS_STR-ELIKZ sy-vline 
WA_CNMMQUANS_STR-EREKZ sy-vline 
WA_CNMMQUANS_STR-MENGE_EKPO sy-vline 
WA_CNMMQUANS_STR-MEINS_EKPO sy-vline 
WA_CNMMQUANS_STR-XEKET sy-vline 
WA_CNMMQUANS_STR-XEKES sy-vline 
WA_CNMMQUANS_STR-XEKBE sy-vline 
WA_CNMMQUANS_STR-VBELN sy-vline 
WA_CNMMQUANS_STR-D_POSNR sy-vline 
WA_CNMMQUANS_STR-LFIMG sy-vline 
WA_CNMMQUANS_STR-MEINS_LIPS sy-vline 
WA_CNMMQUANS_STR-MBLNR sy-vline 
WA_CNMMQUANS_STR-MJAHR sy-vline 
WA_CNMMQUANS_STR-ZEILE sy-vline 
WA_CNMMQUANS_STR-SHKZG sy-vline 
WA_CNMMQUANS_STR-BWART sy-vline 
WA_CNMMQUANS_STR-MENGE_MSEG sy-vline 
WA_CNMMQUANS_STR-MEINS_MSEG sy-vline      INTO ld_text SEPARATED BY SPACE.

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