ABAP Select data from SAP table CNOMDETAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNOMDETAIL
*  INTO TABLE @DATA(IT_CNOMDETAIL2).
*--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_CNOMDETAIL INDEX 1 INTO DATA(WA_CNOMDETAIL2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNOMDETAIL-NOMINATIONAIFSTATUS, sy-vline,
  WA_CNOMDETAIL-TRANSPORTSYSTEM, sy-vline,
  WA_CNOMDETAIL-TRANSPORTSYSTEMNAME, sy-vline,
  WA_CNOMDETAIL-VEHICLEID, sy-vline,
  WA_CNOMDETAIL-NOMINATIONSCHEDULEDATE, sy-vline,
  WA_CNOMDETAIL-NOMINATIONSCHEDULETYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNOMDETAIL 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_CNOMDETAIL 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_CNOMDETAIL INTO WA_CNOMDETAIL.


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

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

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

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

*Conversion exit ALPHA, internal->external for field CONTRACTPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNOMDETAIL-CONTRACTPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNOMDETAIL-CONTRACTPARTNER.
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_CNOMDETAIL_STR, 
MANDT TYPE STRING,
NOMINATIONDOC TYPE STRING,
NOMINATIONDOCITEM TYPE STRING,
NOMINATIONTYPE TYPE STRING,
NOMINATIONEXTNUMBER TYPE STRING,
NOMINATIONAIFSTATUS TYPE STRING,
TRANSPORTSYSTEM TYPE STRING,
TRANSPORTSYSTEMNAME TYPE STRING,
VEHICLEID TYPE STRING,
NOMINATIONSCHEDULEDATE TYPE STRING,
NOMINATIONSCHEDULETYPE TYPE STRING,
NOMINATIONSCHEDULETYPEDESC TYPE STRING,
SCHEDULEDMATERIAL TYPE STRING,
MATERIALDESC TYPE STRING,
SCHEDULEDQUANTITY TYPE STRING,
SCHEDULEDQUANTITYUNIT TYPE STRING,
LOCATIONID TYPE STRING,
LOCATIONNAME TYPE STRING,
CONTRACTPARTNER TYPE STRING,
OILLOCATIONPARTNERPLANT TYPE STRING,
OILLOCATIONPARTNERSTORAGELOC TYPE STRING,
USERISDELETEAUTHORIZED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNOMDETAIL_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_CNOMDETAIL_STR-MANDT sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONDOC sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONDOCITEM sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONTYPE sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONEXTNUMBER sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONAIFSTATUS sy-vline 
WA_CNOMDETAIL_STR-TRANSPORTSYSTEM sy-vline 
WA_CNOMDETAIL_STR-TRANSPORTSYSTEMNAME sy-vline 
WA_CNOMDETAIL_STR-VEHICLEID sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONSCHEDULEDATE sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONSCHEDULETYPE sy-vline 
WA_CNOMDETAIL_STR-NOMINATIONSCHEDULETYPEDESC sy-vline 
WA_CNOMDETAIL_STR-SCHEDULEDMATERIAL sy-vline 
WA_CNOMDETAIL_STR-MATERIALDESC sy-vline 
WA_CNOMDETAIL_STR-SCHEDULEDQUANTITY sy-vline 
WA_CNOMDETAIL_STR-SCHEDULEDQUANTITYUNIT sy-vline 
WA_CNOMDETAIL_STR-LOCATIONID sy-vline 
WA_CNOMDETAIL_STR-LOCATIONNAME sy-vline 
WA_CNOMDETAIL_STR-CONTRACTPARTNER sy-vline 
WA_CNOMDETAIL_STR-OILLOCATIONPARTNERPLANT sy-vline 
WA_CNOMDETAIL_STR-OILLOCATIONPARTNERSTORAGELOC sy-vline 
WA_CNOMDETAIL_STR-USERISDELETEAUTHORIZED sy-vline      INTO ld_text SEPARATED BY SPACE.

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