ABAP Select data from SAP table CNOMITEMVH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNOMITEMVH
*  INTO TABLE @DATA(IT_CNOMITEMVH2).
*--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_CNOMITEMVH INDEX 1 INTO DATA(WA_CNOMITEMVH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNOMITEMVH>-MANDT = 1.
<CNOMITEMVH>-NOMINATIONDOC = 1.
<CNOMITEMVH>-NOMINATIONDOCITEM = 1.
<CNOMITEMVH>-NOMINATIONEXTNUMBER = 1.
<CNOMITEMVH>-LOCATIONID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNOMITEMVH-NOMINATIONTYPE, sy-vline,
  WA_CNOMITEMVH-TRANSPORTSYSTEM, sy-vline,
  WA_CNOMITEMVH-NOMINATIONSHIPPER, sy-vline,
  WA_CNOMITEMVH-NOMINATIONCARRIER, sy-vline,
  WA_CNOMITEMVH-NOMINATIONDOCISBLOCKED, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CNOMITEMVH 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_CNOMITEMVH 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_CNOMITEMVH INTO WA_CNOMITEMVH.


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

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

*Conversion exit ALPHA, internal->external for field NOMINATIONCARRIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNOMITEMVH-NOMINATIONCARRIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNOMITEMVH-NOMINATIONCARRIER.
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_CNOMITEMVH_STR, 
MANDT TYPE STRING,
NOMINATIONDOC TYPE STRING,
NOMINATIONDOCITEM TYPE STRING,
NOMINATIONEXTNUMBER TYPE STRING,
LOCATIONID TYPE STRING,
NOMINATIONTYPE TYPE STRING,
TRANSPORTSYSTEM TYPE STRING,
NOMINATIONSHIPPER TYPE STRING,
NOMINATIONCARRIER TYPE STRING,
NOMINATIONDOCISBLOCKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNOMITEMVH_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_CNOMITEMVH_STR-MANDT sy-vline 
WA_CNOMITEMVH_STR-NOMINATIONDOC sy-vline 
WA_CNOMITEMVH_STR-NOMINATIONDOCITEM sy-vline 
WA_CNOMITEMVH_STR-NOMINATIONEXTNUMBER sy-vline 
WA_CNOMITEMVH_STR-LOCATIONID sy-vline 
WA_CNOMITEMVH_STR-NOMINATIONTYPE sy-vline 
WA_CNOMITEMVH_STR-TRANSPORTSYSTEM sy-vline 
WA_CNOMITEMVH_STR-NOMINATIONSHIPPER sy-vline 
WA_CNOMITEMVH_STR-NOMINATIONCARRIER sy-vline 
WA_CNOMITEMVH_STR-NOMINATIONDOCISBLOCKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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