ABAP Select data from SAP table IWOS_COMP_CHARACTERISTICS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWOS_COMP_CHARACTERISTICS
*  INTO TABLE @DATA(IT_IWOS_COMP_CHARACTERISTICS2).
*--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_IWOS_COMP_CHARACTERISTICS INDEX 1 INTO DATA(WA_IWOS_COMP_CHARACTERISTICS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWOS_COMP_CHARACTERISTICS>-RSNUM = 1.
<IWOS_COMP_CHARACTERISTICS>-RSPOS = 1.
<IWOS_COMP_CHARACTERISTICS>-RSART = 1.
<IWOS_COMP_CHARACTERISTICS>-ACTIVITY = 1.
<IWOS_COMP_CHARACTERISTICS>-UPDATE_INDICATOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWOS_COMP_CHARACTERISTICS-IS_DELETED, sy-vline,
  WA_IWOS_COMP_CHARACTERISTICS-IS_RELEASED, sy-vline,
  WA_IWOS_COMP_CHARACTERISTICS-IS_REFURBISHMENT_MATERIAL, sy-vline,
  WA_IWOS_COMP_CHARACTERISTICS-IS_ADVANCED_SHIPMENT_ITEM, sy-vline,
  WA_IWOS_COMP_CHARACTERISTICS-IS_MULTILEVEL_BOTTOM_LEVEL, sy-vline,
  WA_IWOS_COMP_CHARACTERISTICS-IS_TEXTITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWOS_COMP_CHARACTERISTICS 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_IWOS_COMP_CHARACTERISTICS 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_IWOS_COMP_CHARACTERISTICS INTO WA_IWOS_COMP_CHARACTERISTICS.


*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 ISOLA, internal->external for field HAS_LONGTEXT
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IWOS_COMP_CHARACTERISTICS-HAS_LONGTEXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWOS_COMP_CHARACTERISTICS-HAS_LONGTEXT.
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_IWOS_COMP_CHARACTERISTICS_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
ACTIVITY TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
IS_DELETED TYPE STRING,
IS_RELEASED TYPE STRING,
IS_REFURBISHMENT_MATERIAL TYPE STRING,
IS_ADVANCED_SHIPMENT_ITEM TYPE STRING,
IS_MULTILEVEL_BOTTOM_LEVEL TYPE STRING,
IS_TEXTITEM TYPE STRING,
IS_TEXTITEM_WITH_MATERIAL TYPE STRING,
IS_RELEVANT_FOR_RES_PURCH TYPE STRING,
IS_COMPONENT_FROM_BOM TYPE STRING,
IS_INVENTORY_MGMT_RELEVANT TYPE STRING,
IS_USING_BASE_QUANTITY TYPE STRING,
IS_DISPLAYING_BASE_QUANTITY TYPE STRING,
IS_PIPELINE_OR_CONSIGNATION TYPE STRING,
IS_ALTERNATIVE_ITEM TYPE STRING,
IS_BATCH_SUM_OR_DISCONTIN TYPE STRING,
IS_BATCH_ITEM TYPE STRING,
IS_BATCH_SUM_ITEM TYPE STRING,
IS_BATCH_SPLIT_ITEM TYPE STRING,
IS_DISCONTINUATION_ITEM TYPE STRING,
IS_COMPLEX_DISCONTINUATION TYPE STRING,
IS_WITHDRAWN TYPE STRING,
IS_ITEM_WITH_ORIG_QUANTITY TYPE STRING,
IS_ITEM_WITH_ORIG_QUAN_UNIT TYPE STRING,
IS_ITEM_WITH_USAGE_PROBAB TYPE STRING,
IS_DUMMY_ITEM TYPE STRING,
IS_ITEM_WITH_MATERIAL_NO TYPE STRING,
IS_ITEM_WITH_PO TYPE STRING,
IS_UNVALUATED_STOCK_ITEM TYPE STRING,
IS_UNVALUATED_ADVANCED_SHP TYPE STRING,
IS_BULK_MATERIAL TYPE STRING,
IS_COSTING_RELEVANT_BULK_MAT TYPE STRING,
IS_ITEM_FROM_PROJECT_STOCK TYPE STRING,
IS_ITEM_FROM_CUSTOMER_PROJ TYPE STRING,
IS_ITEM_FROM_CUSTOMER_STOCK TYPE STRING,
IS_ITEM_WITHOUT_WBSELEMENT TYPE STRING,
IS_ITEM_WITHOUT_WBS_OR_ORDER TYPE STRING,
IS_ITEM_WITH_INFO_RECORD TYPE STRING,
IS_ITEM_WITH_DIRECT_PROCURE TYPE STRING,
IS_ITEM_WITH_EXTERNAL_DATA TYPE STRING,
IS_ITEM_WITH_PURCH_REQ TYPE STRING,
IS_ITEM_WITH_VARIABLE_SIZE TYPE STRING,
IS_REQUIRING_BATCH TYPE STRING,
HAS_LONGTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWOS_COMP_CHARACTERISTICS_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_IWOS_COMP_CHARACTERISTICS_STR-RSNUM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-RSPOS sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-RSART sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-ACTIVITY sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-UPDATE_INDICATOR sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_DELETED sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_RELEASED sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_REFURBISHMENT_MATERIAL sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ADVANCED_SHIPMENT_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_MULTILEVEL_BOTTOM_LEVEL sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_TEXTITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_TEXTITEM_WITH_MATERIAL sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_RELEVANT_FOR_RES_PURCH sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_COMPONENT_FROM_BOM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_INVENTORY_MGMT_RELEVANT sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_USING_BASE_QUANTITY sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_DISPLAYING_BASE_QUANTITY sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_PIPELINE_OR_CONSIGNATION sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ALTERNATIVE_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_BATCH_SUM_OR_DISCONTIN sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_BATCH_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_BATCH_SUM_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_BATCH_SPLIT_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_DISCONTINUATION_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_COMPLEX_DISCONTINUATION sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_WITHDRAWN sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_ORIG_QUANTITY sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_ORIG_QUAN_UNIT sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_USAGE_PROBAB sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_DUMMY_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_MATERIAL_NO sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_PO sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_UNVALUATED_STOCK_ITEM sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_UNVALUATED_ADVANCED_SHP sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_BULK_MATERIAL sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_COSTING_RELEVANT_BULK_MAT sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_FROM_PROJECT_STOCK sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_FROM_CUSTOMER_PROJ sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_FROM_CUSTOMER_STOCK sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITHOUT_WBSELEMENT sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITHOUT_WBS_OR_ORDER sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_INFO_RECORD sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_DIRECT_PROCURE sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_EXTERNAL_DATA sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_PURCH_REQ sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_ITEM_WITH_VARIABLE_SIZE sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-IS_REQUIRING_BATCH sy-vline 
WA_IWOS_COMP_CHARACTERISTICS_STR-HAS_LONGTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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