ABAP Select data from SAP table ICOMMITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICOMMITEM
*  INTO TABLE @DATA(IT_ICOMMITEM2).
*--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_ICOMMITEM INDEX 1 INTO DATA(WA_ICOMMITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICOMMITEM>-MANDT = 1.
<ICOMMITEM>-FINANCIALMANAGEMENTAREA = 1.
<ICOMMITEM>-FINMGMTAREAFISCALYEAR = 1.
<ICOMMITEM>-COMMITMENTITEM = 1.
<ICOMMITEM>-COMMITMENTITEMSHORTID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICOMMITEM-COMMITMENTITEMISPOSTINGENABLED, sy-vline,
  WA_ICOMMITEM-CMTMTITMFINANCIALTRANSACTION, sy-vline,
  WA_ICOMMITEM-COMMITMENTITEMCATEGORY, sy-vline,
  WA_ICOMMITEM-COMMITMENTITEMTYPE, sy-vline,
  WA_ICOMMITEM-PARENTCOMMITMENTITEM, sy-vline,
  WA_ICOMMITEM-COMMITMENTITEMINTERNALID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICOMMITEM 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_ICOMMITEM 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_ICOMMITEM INTO WA_ICOMMITEM.


*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 GJAHR, internal->external for field FINMGMTAREAFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ICOMMITEM-FINMGMTAREAFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICOMMITEM-FINMGMTAREAFISCALYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIL, internal->external for field COMMITMENTITEM
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_ICOMMITEM-COMMITMENTITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICOMMITEM-COMMITMENTITEM.
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_ICOMMITEM_STR, 
MANDT TYPE STRING,
FINANCIALMANAGEMENTAREA TYPE STRING,
FINMGMTAREAFISCALYEAR TYPE STRING,
COMMITMENTITEM TYPE STRING,
COMMITMENTITEMSHORTID TYPE STRING,
COMMITMENTITEMISPOSTINGENABLED TYPE STRING,
CMTMTITMFINANCIALTRANSACTION TYPE STRING,
COMMITMENTITEMCATEGORY TYPE STRING,
COMMITMENTITEMTYPE TYPE STRING,
PARENTCOMMITMENTITEM TYPE STRING,
COMMITMENTITEMINTERNALID TYPE STRING,
FUNDSCENTER TYPE STRING,
CMTMTITMDEFAULTFUNDSCENTER TYPE STRING,
CMTMTITMCARRYFWDITMCATEGORY TYPE STRING,
COMMITMENTITEMISSTATISTICAL TYPE STRING,
COMMITMENTITEMAUTHZNGRP TYPE STRING,
CMTMTITEMFINMGMTAREAFORAUTHZN TYPE STRING,
VALIDITYENDDATE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
COMMITMENTITEMEXPIRATIONDATE TYPE STRING,
CREATIONDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
PT_BUDGETCLASSIFICATIONTYPE TYPE STRING,
PT_ISDEDUCTIBLEVATPOSTING TYPE STRING,
PT_COMMITMENTITMCLASSIFICATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICOMMITEM_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_ICOMMITEM_STR-MANDT sy-vline 
WA_ICOMMITEM_STR-FINANCIALMANAGEMENTAREA sy-vline 
WA_ICOMMITEM_STR-FINMGMTAREAFISCALYEAR sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEM sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMSHORTID sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMISPOSTINGENABLED sy-vline 
WA_ICOMMITEM_STR-CMTMTITMFINANCIALTRANSACTION sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMCATEGORY sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMTYPE sy-vline 
WA_ICOMMITEM_STR-PARENTCOMMITMENTITEM sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMINTERNALID sy-vline 
WA_ICOMMITEM_STR-FUNDSCENTER sy-vline 
WA_ICOMMITEM_STR-CMTMTITMDEFAULTFUNDSCENTER sy-vline 
WA_ICOMMITEM_STR-CMTMTITMCARRYFWDITMCATEGORY sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMISSTATISTICAL sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMAUTHZNGRP sy-vline 
WA_ICOMMITEM_STR-CMTMTITEMFINMGMTAREAFORAUTHZN sy-vline 
WA_ICOMMITEM_STR-VALIDITYENDDATE sy-vline 
WA_ICOMMITEM_STR-VALIDITYSTARTDATE sy-vline 
WA_ICOMMITEM_STR-COMMITMENTITEMEXPIRATIONDATE sy-vline 
WA_ICOMMITEM_STR-CREATIONDATE sy-vline 
WA_ICOMMITEM_STR-CREATEDBYUSER sy-vline 
WA_ICOMMITEM_STR-PT_BUDGETCLASSIFICATIONTYPE sy-vline 
WA_ICOMMITEM_STR-PT_ISDEDUCTIBLEVATPOSTING sy-vline 
WA_ICOMMITEM_STR-PT_COMMITMENTITMCLASSIFICATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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