ABAP Select data from SAP table CNOMINATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNOMINATION
*  INTO TABLE @DATA(IT_CNOMINATION2).
*--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_CNOMINATION INDEX 1 INTO DATA(WA_CNOMINATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNOMINATION>-MANDT = 1.
<CNOMINATION>-NOMINATIONDOC = 1.
<CNOMINATION>-NOMINATIONEXTNUMBER = 1.
<CNOMINATION>-NOMINATIONTYPE = 1.
<CNOMINATION>-NOMINATIONPIPELINECYCLEID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNOMINATION-TRANSPORTSYSTEM, sy-vline,
  WA_CNOMINATION-VEHICLEIDENTIFIER, sy-vline,
  WA_CNOMINATION-NOMINATIONHEADERSTATUS, sy-vline,
  WA_CNOMINATION-VEHICLEID, sy-vline,
  WA_CNOMINATION-NOMINATIONCARRIER, sy-vline,
  WA_CNOMINATION-NOMINATIONSHIPPER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNOMINATION 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_CNOMINATION 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_CNOMINATION INTO WA_CNOMINATION.


*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_CNOMINATION-NOMINATIONDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNOMINATION-NOMINATIONDOC.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field NOMINATIONUNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNOMINATION-NOMINATIONUNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNOMINATION-NOMINATIONUNITOFMEASURE.
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_CNOMINATION_STR, 
MANDT TYPE STRING,
NOMINATIONDOC TYPE STRING,
NOMINATIONEXTNUMBER TYPE STRING,
NOMINATIONTYPE TYPE STRING,
NOMINATIONPIPELINECYCLEID TYPE STRING,
TRANSPORTSYSTEM TYPE STRING,
VEHICLEIDENTIFIER TYPE STRING,
NOMINATIONHEADERSTATUS TYPE STRING,
VEHICLEID TYPE STRING,
NOMINATIONCARRIER TYPE STRING,
NOMINATIONSHIPPER TYPE STRING,
BULKSHIPMENTTYPE TYPE STRING,
TRANSPORTATIONPLANNINGPOINT TYPE STRING,
INTRANSITPLANTSTORAGELOC TYPE STRING,
INTRANSITPLANT TYPE STRING,
INTRANSITSTORAGELOCATION TYPE STRING,
NOMINATIONCREATEDBYUSER TYPE STRING,
NOMINATIONCREATIONDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
NOMINATIONCHANGEDDATE TYPE STRING,
NOMINATIONUNITOFMEASURE TYPE STRING,
NOMINATIONMODEOFTRANSPORT TYPE STRING,
NOMINATIONDOCISBLOCKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNOMINATION_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_CNOMINATION_STR-MANDT sy-vline 
WA_CNOMINATION_STR-NOMINATIONDOC sy-vline 
WA_CNOMINATION_STR-NOMINATIONEXTNUMBER sy-vline 
WA_CNOMINATION_STR-NOMINATIONTYPE sy-vline 
WA_CNOMINATION_STR-NOMINATIONPIPELINECYCLEID sy-vline 
WA_CNOMINATION_STR-TRANSPORTSYSTEM sy-vline 
WA_CNOMINATION_STR-VEHICLEIDENTIFIER sy-vline 
WA_CNOMINATION_STR-NOMINATIONHEADERSTATUS sy-vline 
WA_CNOMINATION_STR-VEHICLEID sy-vline 
WA_CNOMINATION_STR-NOMINATIONCARRIER sy-vline 
WA_CNOMINATION_STR-NOMINATIONSHIPPER sy-vline 
WA_CNOMINATION_STR-BULKSHIPMENTTYPE sy-vline 
WA_CNOMINATION_STR-TRANSPORTATIONPLANNINGPOINT sy-vline 
WA_CNOMINATION_STR-INTRANSITPLANTSTORAGELOC sy-vline 
WA_CNOMINATION_STR-INTRANSITPLANT sy-vline 
WA_CNOMINATION_STR-INTRANSITSTORAGELOCATION sy-vline 
WA_CNOMINATION_STR-NOMINATIONCREATEDBYUSER sy-vline 
WA_CNOMINATION_STR-NOMINATIONCREATIONDATE sy-vline 
WA_CNOMINATION_STR-LASTCHANGEDBYUSER sy-vline 
WA_CNOMINATION_STR-NOMINATIONCHANGEDDATE sy-vline 
WA_CNOMINATION_STR-NOMINATIONUNITOFMEASURE sy-vline 
WA_CNOMINATION_STR-NOMINATIONMODEOFTRANSPORT sy-vline 
WA_CNOMINATION_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.