ABAP Select data from SAP table IOPNCTLGITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IOPNCTLGITEM
*  INTO TABLE @DATA(IT_IOPNCTLGITEM2).
*--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_IOPNCTLGITEM INDEX 1 INTO DATA(WA_IOPNCTLGITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IOPNCTLGITEM>-MANDT = 1.
<IOPNCTLGITEM>-OPNCTLGITEMID = 1.
<IOPNCTLGITEM>-OPNCTLGITEMKEY = 1.
<IOPNCTLGITEM>-OPNCTLGPRICEID = 1.
<IOPNCTLGITEM>-OPNCTLGEXTERNALPRODUCTID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IOPNCTLGITEM-OPNCTLGWEBSERVICEID, sy-vline,
  WA_IOPNCTLGITEM-OPNCTLGWEBSERVICENAME, sy-vline,
  WA_IOPNCTLGITEM-PRODUCTCATALOGNAME, sy-vline,
  WA_IOPNCTLGITEM-OPNCTLGINTCATALOGNAME, sy-vline,
  WA_IOPNCTLGITEM-OPNCTLGSUPPLIERNAME, sy-vline,
  WA_IOPNCTLGITEM-OPNCTLGSUPPLIERID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IOPNCTLGITEM 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_IOPNCTLGITEM 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_IOPNCTLGITEM INTO WA_IOPNCTLGITEM.


*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 LOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IOPNCTLGITEM-LOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IOPNCTLGITEM-LOGICALSYSTEM.
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_IOPNCTLGITEM_STR, 
MANDT TYPE STRING,
OPNCTLGITEMID TYPE STRING,
OPNCTLGITEMKEY TYPE STRING,
OPNCTLGPRICEID TYPE STRING,
OPNCTLGEXTERNALPRODUCTID TYPE STRING,
OPNCTLGWEBSERVICEID TYPE STRING,
OPNCTLGWEBSERVICENAME TYPE STRING,
PRODUCTCATALOGNAME TYPE STRING,
OPNCTLGINTCATALOGNAME TYPE STRING,
OPNCTLGSUPPLIERNAME TYPE STRING,
OPNCTLGSUPPLIERID TYPE STRING,
OPNCTLGMATERIALIDBYSUPPLIER TYPE STRING,
ITEMTYPE TYPE STRING,
SERVICE TYPE STRING,
OPNCTLGPRCVALIDITYSTARTDATE TYPE STRING,
OPNCTLGPRCVALIDITYENDDATE TYPE STRING,
NETPRICEQUANTITY TYPE STRING,
TAXTOLERANCEPERCENT TYPE STRING,
MATERIAL TYPE STRING,
MATERIALGROUP TYPE STRING,
MANUFACTURERNAME TYPE STRING,
MANUFACTURER TYPE STRING,
MANUFACTURERMATERIAL TYPE STRING,
OPNCTLGLEADTMEANNCMNTDUDAYSVAL TYPE STRING,
UNITOFMEASURE TYPE STRING,
OPNCTLGCONTENTUNIT TYPE STRING,
OPNCTLGPACKINGQTY TYPE STRING,
OPNCTLGMINORDERQUANTITY TYPE STRING,
MATERIALFIXEDLOTSIZEQUANTITY TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
OPNCTLGCONTRACTITEM TYPE STRING,
OPNCTLGEXTERNALQUOTEID TYPE STRING,
OPNCTLGEXTQUOTEITEM TYPE STRING,
OPNCTLGEXTSCHEMATYPE TYPE STRING,
OPNCTLGEXTERNALCATEGORYID TYPE STRING,
OPNCTLGEXTERNALCATEGORY TYPE STRING,
OPENCATALOGUSERRATINGVALUE TYPE STRING,
PARENTITEM TYPE STRING,
ISMARKEDFORDELETION TYPE STRING,
ISOPNCTLGMANAGED TYPE STRING,
ISOPNCTLGITMFRMMATLMSTR TYPE STRING,
ISOPNCTLGITEM TYPE STRING,
CHANGEDDATETIME TYPE STRING,
OPNCTLGCHANGEDBY TYPE STRING,
OPNCTLGITEMSUSTAINCOMPLIANCE TYPE STRING,
OPNCTLGDIRECTEMISSIONVALUE TYPE STRING,
OPNCTLGDIRECTEMISSIONUNIT TYPE STRING,
OPNCTLGINDRCTEMISSIONVALUE TYPE STRING,
OPNCTLGINDRCTEMISSIONUNIT TYPE STRING,
OPNCTLGTEMPEMISSIONVALUE TYPE STRING,
OPNCTLGTEMPEMISSIONUNIT TYPE STRING,
OPNCTLGRECYCLEVALUE TYPE STRING,
OPNCTLGRECYCLEUNIT TYPE STRING,
OPNCTLGWATERCONSUMPTIONVALUE TYPE STRING,
OPNCTLGWATERCONSUMPTIONUNIT TYPE STRING,
OPNCTLGENERGYCONSUMPTIONVALUE TYPE STRING,
OPNCTLGENERGYCONSUMPTIONUNIT TYPE STRING,
OPNCTLGWASTEGENERATEDVALUE TYPE STRING,
OPNCTLGWASTEGENERATEDUNIT TYPE STRING,
LOGICALSYSTEM TYPE STRING,
OPNCTLGSYSTEMNAME TYPE STRING,
SOURCELOGICALSYSTEM TYPE STRING,
PRODUCTTYPE TYPE STRING,
OPNCTLGCATEGORYID TYPE STRING,
DECIMALS TYPE STRING,
OPNCTLGHASPRODRELATIONEXISTS TYPE STRING,
OPNCTLGHASPRICESCALE TYPE STRING,
OPNCTLGITEMPRPSLID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IOPNCTLGITEM_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_IOPNCTLGITEM_STR-MANDT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGITEMID sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGITEMKEY sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGPRICEID sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGEXTERNALPRODUCTID sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGWEBSERVICEID sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGWEBSERVICENAME sy-vline 
WA_IOPNCTLGITEM_STR-PRODUCTCATALOGNAME sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGINTCATALOGNAME sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGSUPPLIERNAME sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGSUPPLIERID sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGMATERIALIDBYSUPPLIER sy-vline 
WA_IOPNCTLGITEM_STR-ITEMTYPE sy-vline 
WA_IOPNCTLGITEM_STR-SERVICE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGPRCVALIDITYSTARTDATE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGPRCVALIDITYENDDATE sy-vline 
WA_IOPNCTLGITEM_STR-NETPRICEQUANTITY sy-vline 
WA_IOPNCTLGITEM_STR-TAXTOLERANCEPERCENT sy-vline 
WA_IOPNCTLGITEM_STR-MATERIAL sy-vline 
WA_IOPNCTLGITEM_STR-MATERIALGROUP sy-vline 
WA_IOPNCTLGITEM_STR-MANUFACTURERNAME sy-vline 
WA_IOPNCTLGITEM_STR-MANUFACTURER sy-vline 
WA_IOPNCTLGITEM_STR-MANUFACTURERMATERIAL sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGLEADTMEANNCMNTDUDAYSVAL sy-vline 
WA_IOPNCTLGITEM_STR-UNITOFMEASURE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGCONTENTUNIT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGPACKINGQTY sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGMINORDERQUANTITY sy-vline 
WA_IOPNCTLGITEM_STR-MATERIALFIXEDLOTSIZEQUANTITY sy-vline 
WA_IOPNCTLGITEM_STR-CONTRACTACCOUNT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGCONTRACTITEM sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGEXTERNALQUOTEID sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGEXTQUOTEITEM sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGEXTSCHEMATYPE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGEXTERNALCATEGORYID sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGEXTERNALCATEGORY sy-vline 
WA_IOPNCTLGITEM_STR-OPENCATALOGUSERRATINGVALUE sy-vline 
WA_IOPNCTLGITEM_STR-PARENTITEM sy-vline 
WA_IOPNCTLGITEM_STR-ISMARKEDFORDELETION sy-vline 
WA_IOPNCTLGITEM_STR-ISOPNCTLGMANAGED sy-vline 
WA_IOPNCTLGITEM_STR-ISOPNCTLGITMFRMMATLMSTR sy-vline 
WA_IOPNCTLGITEM_STR-ISOPNCTLGITEM sy-vline 
WA_IOPNCTLGITEM_STR-CHANGEDDATETIME sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGCHANGEDBY sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGITEMSUSTAINCOMPLIANCE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGDIRECTEMISSIONVALUE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGDIRECTEMISSIONUNIT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGINDRCTEMISSIONVALUE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGINDRCTEMISSIONUNIT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGTEMPEMISSIONVALUE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGTEMPEMISSIONUNIT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGRECYCLEVALUE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGRECYCLEUNIT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGWATERCONSUMPTIONVALUE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGWATERCONSUMPTIONUNIT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGENERGYCONSUMPTIONVALUE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGENERGYCONSUMPTIONUNIT sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGWASTEGENERATEDVALUE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGWASTEGENERATEDUNIT sy-vline 
WA_IOPNCTLGITEM_STR-LOGICALSYSTEM sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGSYSTEMNAME sy-vline 
WA_IOPNCTLGITEM_STR-SOURCELOGICALSYSTEM sy-vline 
WA_IOPNCTLGITEM_STR-PRODUCTTYPE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGCATEGORYID sy-vline 
WA_IOPNCTLGITEM_STR-DECIMALS sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGHASPRODRELATIONEXISTS sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGHASPRICESCALE sy-vline 
WA_IOPNCTLGITEM_STR-OPNCTLGITEMPRPSLID sy-vline      INTO ld_text SEPARATED BY SPACE.

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