ABAP Select data from SAP table ICCOMPONENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICCOMPONENT
*  INTO TABLE @DATA(IT_ICCOMPONENT2).
*--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_ICCOMPONENT INDEX 1 INTO DATA(WA_ICCOMPONENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICCOMPONENT>-MANDT = 1.
<ICCOMPONENT>-CHMLCOMPUUID = 1.
<ICCOMPONENT>-CHMLCMPLNCINFOUUID = 1.
<ICCOMPONENT>-CHMLSUPLRMATLUUID = 1.
<ICCOMPONENT>-CHMLCOMPOSITIONUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICCOMPONENT-CREATIONUTCDATETIME, sy-vline,
  WA_ICCOMPONENT-CREATEDBYUSER, sy-vline,
  WA_ICCOMPONENT-LASTCHANGEUTCDATETIME, sy-vline,
  WA_ICCOMPONENT-LASTCHANGEDBYUSER, sy-vline,
  WA_ICCOMPONENT-SUBSTANCEUUID, sy-vline,
  WA_ICCOMPONENT-CHMLCOMPISREMOVED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICCOMPONENT 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_ICCOMPONENT 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_ICCOMPONENT INTO WA_ICCOMPONENT.


*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 CUNIT, internal->external for field CHMLCOMPQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICCOMPONENT-CHMLCOMPQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICCOMPONENT-CHMLCOMPQTYUNIT.
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_ICCOMPONENT_STR, 
MANDT TYPE STRING,
CHMLCOMPUUID TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
CHMLSUPLRMATLUUID TYPE STRING,
CHMLCOMPOSITIONUUID TYPE STRING,
CREATIONUTCDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEUTCDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
SUBSTANCEUUID TYPE STRING,
CHMLCOMPISREMOVED TYPE STRING,
CHMLCOMPTYPE TYPE STRING,
CHMLCOMPQTY TYPE STRING,
CHMLCOMPQTYASTEXT TYPE STRING,
CHMLCOMPQTYUNIT TYPE STRING,
CHMLCOMPOPERATORLOWERLIMIT TYPE STRING,
CHMLCOMPQTYLOWERLIMIT TYPE STRING,
CHMLCOMPQTYLOWERLIMITASTEXT TYPE STRING,
CHMLCOMPOPERATORUPPERLIMIT TYPE STRING,
CHMLCOMPQTYUPPERLIMIT TYPE STRING,
CHMLCOMPQTYUPPERLIMITASTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICCOMPONENT_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_ICCOMPONENT_STR-MANDT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPUUID sy-vline 
WA_ICCOMPONENT_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_ICCOMPONENT_STR-CHMLSUPLRMATLUUID sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPOSITIONUUID sy-vline 
WA_ICCOMPONENT_STR-CREATIONUTCDATETIME sy-vline 
WA_ICCOMPONENT_STR-CREATEDBYUSER sy-vline 
WA_ICCOMPONENT_STR-LASTCHANGEUTCDATETIME sy-vline 
WA_ICCOMPONENT_STR-LASTCHANGEDBYUSER sy-vline 
WA_ICCOMPONENT_STR-SUBSTANCEUUID sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPISREMOVED sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPTYPE sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPQTY sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPQTYASTEXT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPQTYUNIT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPOPERATORLOWERLIMIT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPQTYLOWERLIMIT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPQTYLOWERLIMITASTEXT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPOPERATORUPPERLIMIT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPQTYUPPERLIMIT sy-vline 
WA_ICCOMPONENT_STR-CHMLCOMPQTYUPPERLIMITASTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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