ABAP Select data from SAP table CMMPOITMCHGCNT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMMPOITMCHGCNT
*  INTO TABLE @DATA(IT_CMMPOITMCHGCNT2).
*--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_CMMPOITMCHGCNT INDEX 1 INTO DATA(WA_CMMPOITMCHGCNT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMMPOITMCHGCNT>-MANDT = 1.
<CMMPOITMCHGCNT>-PURCHASEORDER = 1.
<CMMPOITMCHGCNT>-PURCHASEORDERITEM = 1.
<CMMPOITMCHGCNT>-SUPPLIER = 1.
<CMMPOITMCHGCNT>-SUPPLIERNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMMPOITMCHGCNT-MATERIAL, sy-vline,
  WA_CMMPOITMCHGCNT-MATERIALNAME, sy-vline,
  WA_CMMPOITMCHGCNT-MATERIALGROUP, sy-vline,
  WA_CMMPOITMCHGCNT-MATERIALGROUPNAME, sy-vline,
  WA_CMMPOITMCHGCNT-PURCHASINGGROUP, sy-vline,
  WA_CMMPOITMCHGCNT-PURCHASINGGROUPNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMMPOITMCHGCNT 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_CMMPOITMCHGCNT 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_CMMPOITMCHGCNT INTO WA_CMMPOITMCHGCNT.


*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 PURCHASEORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMPOITMCHGCNT-PURCHASEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMPOITMCHGCNT-PURCHASEORDER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CMMPOITMCHGCNT-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMPOITMCHGCNT-MATERIAL.
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_CMMPOITMCHGCNT_STR, 
MANDT TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
MATERIAL TYPE STRING,
MATERIALNAME TYPE STRING,
MATERIALGROUP TYPE STRING,
MATERIALGROUPNAME TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGGROUPNAME TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGORGANIZATIONNAME TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
PURCHASEORDERDATE TYPE STRING,
COMPANYCODE TYPE STRING,
COMPANYCODENAME TYPE STRING,
PURCHASINGCATEGORY TYPE STRING,
PURGCATNAME TYPE STRING,
CREATEDBYUSER TYPE STRING,
CALENDARYEAR TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARWEEK TYPE STRING,
NUMBEROFQUANTITYCHANGES TYPE STRING,
NUMBEROFPRICECHANGES TYPE STRING,
NMBROFPURCHASINGGROUPCHANGES TYPE STRING,
TOTALNOOFSTORAGELOCCHANGES TYPE STRING,
TOTALNOOFPOITEMSADDED TYPE STRING,
TOTALNOOFPOPAYTERMCHANGES TYPE STRING,
TOTALNOOFPODELDATECHANGES TYPE STRING,
TOTALNOOFPOITEMCHANGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMMPOITMCHGCNT_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_CMMPOITMCHGCNT_STR-MANDT sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASEORDER sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASEORDERITEM sy-vline 
WA_CMMPOITMCHGCNT_STR-SUPPLIER sy-vline 
WA_CMMPOITMCHGCNT_STR-SUPPLIERNAME sy-vline 
WA_CMMPOITMCHGCNT_STR-MATERIAL sy-vline 
WA_CMMPOITMCHGCNT_STR-MATERIALNAME sy-vline 
WA_CMMPOITMCHGCNT_STR-MATERIALGROUP sy-vline 
WA_CMMPOITMCHGCNT_STR-MATERIALGROUPNAME sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASINGGROUP sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASINGGROUPNAME sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASINGORGANIZATION sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASINGORGANIZATIONNAME sy-vline 
WA_CMMPOITMCHGCNT_STR-PLANT sy-vline 
WA_CMMPOITMCHGCNT_STR-PLANTNAME sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASEORDERDATE sy-vline 
WA_CMMPOITMCHGCNT_STR-COMPANYCODE sy-vline 
WA_CMMPOITMCHGCNT_STR-COMPANYCODENAME sy-vline 
WA_CMMPOITMCHGCNT_STR-PURCHASINGCATEGORY sy-vline 
WA_CMMPOITMCHGCNT_STR-PURGCATNAME sy-vline 
WA_CMMPOITMCHGCNT_STR-CREATEDBYUSER sy-vline 
WA_CMMPOITMCHGCNT_STR-CALENDARYEAR sy-vline 
WA_CMMPOITMCHGCNT_STR-CALENDARQUARTER sy-vline 
WA_CMMPOITMCHGCNT_STR-CALENDARMONTH sy-vline 
WA_CMMPOITMCHGCNT_STR-CALENDARWEEK sy-vline 
WA_CMMPOITMCHGCNT_STR-NUMBEROFQUANTITYCHANGES sy-vline 
WA_CMMPOITMCHGCNT_STR-NUMBEROFPRICECHANGES sy-vline 
WA_CMMPOITMCHGCNT_STR-NMBROFPURCHASINGGROUPCHANGES sy-vline 
WA_CMMPOITMCHGCNT_STR-TOTALNOOFSTORAGELOCCHANGES sy-vline 
WA_CMMPOITMCHGCNT_STR-TOTALNOOFPOITEMSADDED sy-vline 
WA_CMMPOITMCHGCNT_STR-TOTALNOOFPOPAYTERMCHANGES sy-vline 
WA_CMMPOITMCHGCNT_STR-TOTALNOOFPODELDATECHANGES sy-vline 
WA_CMMPOITMCHGCNT_STR-TOTALNOOFPOITEMCHANGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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