ABAP Select data from SAP table CVCM_ICMDDICN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVCM_ICMDDICN
*  INTO TABLE @DATA(IT_CVCM_ICMDDICN2).
*--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_CVCM_ICMDDICN INDEX 1 INTO DATA(WA_CVCM_ICMDDICN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CVCM_ICMDDICN>-MANDT = 1.
<CVCM_ICMDDICN>-VALUECHAININSTANCEUUID = 1.
<CVCM_ICMDDICN>-VALUECHAINSTEPINSTANCEUUID = 1.
<CVCM_ICMDDICN>-VALUECHAINDOCUMENTITEMORIGIN = 1.
<CVCM_ICMDDICN>-VALUECHAINBUSINESSOBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVCM_ICMDDICN-VALUECHAINBUSINESSOBJECTITEM, sy-vline,
  WA_CVCM_ICMDDICN-VALUECHAINSTEPPREDECESSORUUID, sy-vline,
  WA_CVCM_ICMDDICN-VALUECHAINPRDCSSRDOCITMORIGIN, sy-vline,
  WA_CVCM_ICMDDICN-VALUECHAINPREDECESSORBUSOBJ, sy-vline,
  WA_CVCM_ICMDDICN-VALUECHAINPRDCSSRBUSOBJITEM, sy-vline,
  WA_CVCM_ICMDDICN-VALUECHAINITEMUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVCM_ICMDDICN 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_CVCM_ICMDDICN 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_CVCM_ICMDDICN INTO WA_CVCM_ICMDDICN.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CVCM_ICMDDICN_STR, 
MANDT TYPE STRING,
VALUECHAININSTANCEUUID TYPE STRING,
VALUECHAINSTEPINSTANCEUUID TYPE STRING,
VALUECHAINDOCUMENTITEMORIGIN TYPE STRING,
VALUECHAINBUSINESSOBJECT TYPE STRING,
VALUECHAINBUSINESSOBJECTITEM TYPE STRING,
VALUECHAINSTEPPREDECESSORUUID TYPE STRING,
VALUECHAINPRDCSSRDOCITMORIGIN TYPE STRING,
VALUECHAINPREDECESSORBUSOBJ TYPE STRING,
VALUECHAINPRDCSSRBUSOBJITEM TYPE STRING,
VALUECHAINITEMUUID TYPE STRING,
VALUECHAINTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVCM_ICMDDICN_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_CVCM_ICMDDICN_STR-MANDT sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAININSTANCEUUID sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINSTEPINSTANCEUUID sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINDOCUMENTITEMORIGIN sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINBUSINESSOBJECT sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINBUSINESSOBJECTITEM sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINSTEPPREDECESSORUUID sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINPRDCSSRDOCITMORIGIN sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINPREDECESSORBUSOBJ sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINPRDCSSRBUSOBJITEM sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINITEMUUID sy-vline 
WA_CVCM_ICMDDICN_STR-VALUECHAINTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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