ABAP Select data from SAP table CVCM_ICMDIH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CVCM_ICMDIH 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_ICMDIH. 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_ICMDIH 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_ICMDIH TYPE STANDARD TABLE OF CVCM_ICMDIH,
      WA_CVCM_ICMDIH TYPE CVCM_ICMDIH,
      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_ICMDIH> TYPE CVCM_ICMDIH.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVCM_ICMDIH
*  INTO TABLE @DATA(IT_CVCM_ICMDIH2).
*--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_ICMDIH INDEX 1 INTO DATA(WA_CVCM_ICMDIH2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVCM_ICMDIH-VALUECHAINITEMUUID, sy-vline,
  WA_CVCM_ICMDIH-VALUECHAININSTANCEUUID, sy-vline,
  WA_CVCM_ICMDIH-VALUECHAINTYPE, sy-vline,
  WA_CVCM_ICMDIH-INTCOVALUECHAINDOCITMSTATUS, sy-vline,
  WA_CVCM_ICMDIH-INTCOVALUECHAINDOCITMSTSNAME, sy-vline,
  WA_CVCM_ICMDIH-INTCOVALCHNDOCITMSTSCRITLTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVCM_ICMDIH 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_ICMDIH 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_ICMDIH INTO WA_CVCM_ICMDIH.


*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_ICMDIH_STR, 
MANDT TYPE STRING,
VALUECHAINSTEPINSTANCEUUID TYPE STRING,
VALUECHAINDOCUMENTITEMORIGIN TYPE STRING,
VALUECHAINBUSINESSOBJECT TYPE STRING,
VALUECHAINBUSINESSOBJECTITEM TYPE STRING,
VALUECHAINITEMUUID TYPE STRING,
VALUECHAININSTANCEUUID TYPE STRING,
VALUECHAINTYPE TYPE STRING,
INTCOVALUECHAINDOCITMSTATUS TYPE STRING,
INTCOVALUECHAINDOCITMSTSNAME TYPE STRING,
INTCOVALCHNDOCITMSTSCRITLTY TYPE STRING,
VALUECHAINSTEPBUSINESSOBJECT TYPE STRING,
VALUECHAINSTEPBUSOBJDESC TYPE STRING,
VALUECHAINSTEPTYPE TYPE STRING,
VALUECHAINSTEPTYPEDESCRIPTION TYPE STRING,
VALUECHAINSTEPINSTANCESTATUS TYPE STRING,
VALUECHAINSTEPINSTANCESTSNAME TYPE STRING,
VALUECHAINSTEPINSTCESTSCRITLTY TYPE STRING,
VALUECHAINPREDECESSORBUSOBJ TYPE STRING,
VALUECHAINPRDCSSRBUSOBJITEM TYPE STRING,
VALUECHAINPREDECESSORSTPBUSOBJ TYPE STRING,
VALUECHAINSTEPPREDECESSORUUID TYPE STRING,
SEMANTICOBJECT TYPE STRING,
INTCOVALCHNDOCNAVGNJSONSTR TYPE STRING,
INTCOVALCHNDOCITMNAVGNJSONSTR TYPE STRING,
DISPLAYINTCOVALUECHAINDOCUMENT TYPE STRING,
DISPLAYINTCOVALUECHAINDOCITEM TYPE STRING,
VALUECHAINBUSOBJITMCNCTNTDID TYPE STRING,
HIERARCHYNODE TYPE STRING,
HIERARCHYPARENTNODE TYPE STRING,
HIERARCHYLEVEL TYPE STRING,
HIERARCHYNODEISORPHAN TYPE STRING,
HIERARCHYNODEISCYCLEENDPOINT TYPE STRING,
HIERARCHYPARENTNODEORDINALNMBR TYPE STRING,
HIERARCHYNODEORDINALNUMBER TYPE STRING,
HIERARCHYNODESUBTREESIZE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVCM_ICMDIH_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_ICMDIH_STR-MANDT sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPINSTANCEUUID sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINDOCUMENTITEMORIGIN sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINBUSINESSOBJECT sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINBUSINESSOBJECTITEM sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINITEMUUID sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAININSTANCEUUID sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINTYPE sy-vline 
WA_CVCM_ICMDIH_STR-INTCOVALUECHAINDOCITMSTATUS sy-vline 
WA_CVCM_ICMDIH_STR-INTCOVALUECHAINDOCITMSTSNAME sy-vline 
WA_CVCM_ICMDIH_STR-INTCOVALCHNDOCITMSTSCRITLTY sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPBUSINESSOBJECT sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPBUSOBJDESC sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPTYPE sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPTYPEDESCRIPTION sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPINSTANCESTATUS sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPINSTANCESTSNAME sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPINSTCESTSCRITLTY sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINPREDECESSORBUSOBJ sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINPRDCSSRBUSOBJITEM sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINPREDECESSORSTPBUSOBJ sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINSTEPPREDECESSORUUID sy-vline 
WA_CVCM_ICMDIH_STR-SEMANTICOBJECT sy-vline 
WA_CVCM_ICMDIH_STR-INTCOVALCHNDOCNAVGNJSONSTR sy-vline 
WA_CVCM_ICMDIH_STR-INTCOVALCHNDOCITMNAVGNJSONSTR sy-vline 
WA_CVCM_ICMDIH_STR-DISPLAYINTCOVALUECHAINDOCUMENT sy-vline 
WA_CVCM_ICMDIH_STR-DISPLAYINTCOVALUECHAINDOCITEM sy-vline 
WA_CVCM_ICMDIH_STR-VALUECHAINBUSOBJITMCNCTNTDID sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYNODE sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYPARENTNODE sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYLEVEL sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYNODEISORPHAN sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYNODEISCYCLEENDPOINT sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYPARENTNODEORDINALNMBR sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYNODEORDINALNUMBER sy-vline 
WA_CVCM_ICMDIH_STR-HIERARCHYNODESUBTREESIZE sy-vline      INTO ld_text SEPARATED BY SPACE.

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