ABAP Select data from SAP table /SCWM/S_PACKITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/S_PACKITEM 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 /SCWM/S_PACKITEM. 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 /SCWM/S_PACKITEM 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_/SCWM/S_PACKITEM TYPE STANDARD TABLE OF /SCWM/S_PACKITEM,
      WA_/SCWM/S_PACKITEM TYPE /SCWM/S_PACKITEM,
      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: </SCWM/S_PACKITEM> TYPE /SCWM/S_PACKITEM.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/S_PACKITEM
  INTO TABLE IT_/SCWM/S_PACKITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_PACKITEM
*  INTO TABLE @DATA(IT_/SCWM/S_PACKITEM2).
*--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_/SCWM/S_PACKITEM INDEX 1 INTO DATA(WA_/SCWM/S_PACKITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/S_PACKITEM ASSIGNING </SCWM/S_PACKITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_PACKITEM>-ITEM_COUNTER = 1.
</SCWM/S_PACKITEM>-GUID_PS = 1.
</SCWM/S_PACKITEM>-UNIT = 1.
</SCWM/S_PACKITEM>-QUAN = 1.
</SCWM/S_PACKITEM>-MATID = 1.

ENDLOOP.

LOOP AT IT_/SCWM/S_PACKITEM INTO WA_/SCWM/S_PACKITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_PACKITEM-BATCHID, sy-vline,
  WA_/SCWM/S_PACKITEM-CAT, sy-vline,
  WA_/SCWM/S_PACKITEM-STOCK_DOCCAT, sy-vline,
  WA_/SCWM/S_PACKITEM-STOCK_DOCNO, sy-vline,
  WA_/SCWM/S_PACKITEM-STOCK_ITMNO, sy-vline,
  WA_/SCWM/S_PACKITEM-DOCCAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_PACKITEM 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_/SCWM/S_PACKITEM 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_/SCWM/S_PACKITEM INTO WA_/SCWM/S_PACKITEM.


*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 ITEM_COUNTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_PACKITEM-ITEM_COUNTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_PACKITEM-ITEM_COUNTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PSID, internal->external for field GUID_PS
CALL FUNCTION 'CONVERSION_EXIT_PSID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_PACKITEM-GUID_PS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_PACKITEM-GUID_PS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MDLPD, internal->external for field MATID
CALL FUNCTION 'CONVERSION_EXIT_MDLPD_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_PACKITEM-MATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_PACKITEM-MATID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BPMAP, internal->external for field OWNER
CALL FUNCTION 'CONVERSION_EXIT_BPMAP_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_PACKITEM-OWNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_PACKITEM-OWNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTITLED
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_PACKITEM-ENTITLED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_PACKITEM-ENTITLED.
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_/SCWM/S_PACKITEM_STR, 
ITEM_COUNTER TYPE STRING,
GUID_PS TYPE STRING,
UNIT TYPE STRING,
QUAN TYPE STRING,
MATID TYPE STRING,
BATCHID TYPE STRING,
CAT TYPE STRING,
STOCK_DOCCAT TYPE STRING,
STOCK_DOCNO TYPE STRING,
STOCK_ITMNO TYPE STRING,
DOCCAT TYPE STRING,
STOCK_USAGE TYPE STRING,
OWNER TYPE STRING,
OWNER_ROLE TYPE STRING,
ENTITLED TYPE STRING,
ENTITLED_ROLE TYPE STRING,
STOCK_CNT TYPE STRING,
GUID_STOCK TYPE STRING,
WDATU TYPE STRING,
VFDAT TYPE STRING,
COO TYPE STRING,
BRESTR TYPE STRING,
INSPTYP TYPE STRING,
INSPID TYPE STRING,
IDPLATE TYPE STRING,
QDOCCAT TYPE STRING,
QDOCID TYPE STRING,
QITMID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_PACKITEM_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_/SCWM/S_PACKITEM_STR-ITEM_COUNTER sy-vline 
WA_/SCWM/S_PACKITEM_STR-GUID_PS sy-vline 
WA_/SCWM/S_PACKITEM_STR-UNIT sy-vline 
WA_/SCWM/S_PACKITEM_STR-QUAN sy-vline 
WA_/SCWM/S_PACKITEM_STR-MATID sy-vline 
WA_/SCWM/S_PACKITEM_STR-BATCHID sy-vline 
WA_/SCWM/S_PACKITEM_STR-CAT sy-vline 
WA_/SCWM/S_PACKITEM_STR-STOCK_DOCCAT sy-vline 
WA_/SCWM/S_PACKITEM_STR-STOCK_DOCNO sy-vline 
WA_/SCWM/S_PACKITEM_STR-STOCK_ITMNO sy-vline 
WA_/SCWM/S_PACKITEM_STR-DOCCAT sy-vline 
WA_/SCWM/S_PACKITEM_STR-STOCK_USAGE sy-vline 
WA_/SCWM/S_PACKITEM_STR-OWNER sy-vline 
WA_/SCWM/S_PACKITEM_STR-OWNER_ROLE sy-vline 
WA_/SCWM/S_PACKITEM_STR-ENTITLED sy-vline 
WA_/SCWM/S_PACKITEM_STR-ENTITLED_ROLE sy-vline 
WA_/SCWM/S_PACKITEM_STR-STOCK_CNT sy-vline 
WA_/SCWM/S_PACKITEM_STR-GUID_STOCK sy-vline 
WA_/SCWM/S_PACKITEM_STR-WDATU sy-vline 
WA_/SCWM/S_PACKITEM_STR-VFDAT sy-vline 
WA_/SCWM/S_PACKITEM_STR-COO sy-vline 
WA_/SCWM/S_PACKITEM_STR-BRESTR sy-vline 
WA_/SCWM/S_PACKITEM_STR-INSPTYP sy-vline 
WA_/SCWM/S_PACKITEM_STR-INSPID sy-vline 
WA_/SCWM/S_PACKITEM_STR-IDPLATE sy-vline 
WA_/SCWM/S_PACKITEM_STR-QDOCCAT sy-vline 
WA_/SCWM/S_PACKITEM_STR-QDOCID sy-vline 
WA_/SCWM/S_PACKITEM_STR-QITMID sy-vline      INTO ld_text SEPARATED BY SPACE.

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