ABAP Select data from SAP table CMPPOITM into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMPPOITM
*  INTO TABLE @DATA(IT_CMPPOITM2).
*--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_CMPPOITM INDEX 1 INTO DATA(WA_CMPPOITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMPPOITM>-MANDT = 1.
<CMPPOITM>-PURCHASEORDER = 1.
<CMPPOITM>-PURCHASEORDERITEM = 1.
<CMPPOITM>-CONTROLLINGOBJECTEXTERNALID = 1.
<CMPPOITM>-ORDERITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMPPOITM-PURCHASEORDERITEMTEXT, sy-vline,
  WA_CMPPOITM-MASTERPROJECT, sy-vline,
  WA_CMPPOITM-MASTERPROJECTNAME, sy-vline,
  WA_CMPPOITM-CONTROLLINGOBJECTDESCRIPTION, sy-vline,
  WA_CMPPOITM-SERVICEPERFORMER, sy-vline,
  WA_CMPPOITM-BUSINESSPARTNERNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMPPOITM 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_CMPPOITM 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_CMPPOITM INTO WA_CMPPOITM.


*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_CMPPOITM-PURCHASEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPPOITM-PURCHASEORDER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CMPPOITM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPPOITM-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMPPOITM-BASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPPOITM-BASEUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMPPOITM-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPPOITM-UNITOFMEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ORDERPRICEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMPPOITM-ORDERPRICEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPPOITM-ORDERPRICEUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMPPOITM-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPPOITM-SUPPLIER.
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_CMPPOITM_STR, 
MANDT TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
CONTROLLINGOBJECTEXTERNALID TYPE STRING,
ORDERITEM TYPE STRING,
PURCHASEORDERITEMTEXT TYPE STRING,
MASTERPROJECT TYPE STRING,
MASTERPROJECTNAME TYPE STRING,
CONTROLLINGOBJECTDESCRIPTION TYPE STRING,
SERVICEPERFORMER TYPE STRING,
BUSINESSPARTNERNAME TYPE STRING,
DOCUMENTDATE TYPE STRING,
DELIVERYDATE TYPE STRING,
MATERIAL TYPE STRING,
MATERIALNAME TYPE STRING,
TOTALQUANTITY TYPE STRING,
NETAMOUNT TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
OPENQUANTITY TYPE STRING,
INVOICEDAMOUNT TYPE STRING,
INVOICEDQUANTITY TYPE STRING,
BASEUNIT TYPE STRING,
UNITOFMEASURE TYPE STRING,
NETPRICEAMOUNT TYPE STRING,
ORDERPRICEUNIT TYPE STRING,
NETPRICEQUANTITY TYPE STRING,
RELEASECODE TYPE STRING,
PURCHASINGRELEASEINDICATORDESC TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
MATERIALGROUP TYPE STRING,
MATERIALGROUPNAME TYPE STRING,
PURCHASEORDERSTATUS TYPE STRING,
PURCHASEORDERAMOUNT TYPE STRING,
QUANTITY TYPE STRING,
OPENAMOUNTINDISPLAYCRCY TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PLANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMPPOITM_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_CMPPOITM_STR-MANDT sy-vline 
WA_CMPPOITM_STR-PURCHASEORDER sy-vline 
WA_CMPPOITM_STR-PURCHASEORDERITEM sy-vline 
WA_CMPPOITM_STR-CONTROLLINGOBJECTEXTERNALID sy-vline 
WA_CMPPOITM_STR-ORDERITEM sy-vline 
WA_CMPPOITM_STR-PURCHASEORDERITEMTEXT sy-vline 
WA_CMPPOITM_STR-MASTERPROJECT sy-vline 
WA_CMPPOITM_STR-MASTERPROJECTNAME sy-vline 
WA_CMPPOITM_STR-CONTROLLINGOBJECTDESCRIPTION sy-vline 
WA_CMPPOITM_STR-SERVICEPERFORMER sy-vline 
WA_CMPPOITM_STR-BUSINESSPARTNERNAME sy-vline 
WA_CMPPOITM_STR-DOCUMENTDATE sy-vline 
WA_CMPPOITM_STR-DELIVERYDATE sy-vline 
WA_CMPPOITM_STR-MATERIAL sy-vline 
WA_CMPPOITM_STR-MATERIALNAME sy-vline 
WA_CMPPOITM_STR-TOTALQUANTITY sy-vline 
WA_CMPPOITM_STR-NETAMOUNT sy-vline 
WA_CMPPOITM_STR-DOCUMENTCURRENCY sy-vline 
WA_CMPPOITM_STR-OPENQUANTITY sy-vline 
WA_CMPPOITM_STR-INVOICEDAMOUNT sy-vline 
WA_CMPPOITM_STR-INVOICEDQUANTITY sy-vline 
WA_CMPPOITM_STR-BASEUNIT sy-vline 
WA_CMPPOITM_STR-UNITOFMEASURE sy-vline 
WA_CMPPOITM_STR-NETPRICEAMOUNT sy-vline 
WA_CMPPOITM_STR-ORDERPRICEUNIT sy-vline 
WA_CMPPOITM_STR-NETPRICEQUANTITY sy-vline 
WA_CMPPOITM_STR-RELEASECODE sy-vline 
WA_CMPPOITM_STR-PURCHASINGRELEASEINDICATORDESC sy-vline 
WA_CMPPOITM_STR-SUPPLIER sy-vline 
WA_CMPPOITM_STR-SUPPLIERNAME sy-vline 
WA_CMPPOITM_STR-MATERIALGROUP sy-vline 
WA_CMPPOITM_STR-MATERIALGROUPNAME sy-vline 
WA_CMPPOITM_STR-PURCHASEORDERSTATUS sy-vline 
WA_CMPPOITM_STR-PURCHASEORDERAMOUNT sy-vline 
WA_CMPPOITM_STR-QUANTITY sy-vline 
WA_CMPPOITM_STR-OPENAMOUNTINDISPLAYCRCY sy-vline 
WA_CMPPOITM_STR-PURCHASINGORGANIZATION sy-vline 
WA_CMPPOITM_STR-PURCHASINGGROUP sy-vline 
WA_CMPPOITM_STR-PLANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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