ABAP Select data from SAP table /SCWM/S_PACK_VIEW_DHU 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_PACK_VIEW_DHU 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_PACK_VIEW_DHU. 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_PACK_VIEW_DHU 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_PACK_VIEW_DHU TYPE STANDARD TABLE OF /SCWM/S_PACK_VIEW_DHU,
      WA_/SCWM/S_PACK_VIEW_DHU TYPE /SCWM/S_PACK_VIEW_DHU,
      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_PACK_VIEW_DHU> TYPE /SCWM/S_PACK_VIEW_DHU.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_PACK_VIEW_DHU
*  INTO TABLE @DATA(IT_/SCWM/S_PACK_VIEW_DHU2).
*--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_PACK_VIEW_DHU INDEX 1 INTO DATA(WA_/SCWM/S_PACK_VIEW_DHU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_PACK_VIEW_DHU>-GUID_HU = 1.
</SCWM/S_PACK_VIEW_DHU>-HUIDENT = 1.
</SCWM/S_PACK_VIEW_DHU>-DSTGRP = 1.
</SCWM/S_PACK_VIEW_DHU>-PMAT = 1.
</SCWM/S_PACK_VIEW_DHU>-PMAT_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_PACK_VIEW_DHU-QUAN, sy-vline,
  WA_/SCWM/S_PACK_VIEW_DHU-ICON_CREATE, sy-vline,
  WA_/SCWM/S_PACK_VIEW_DHU-UNIT, sy-vline,
  WA_/SCWM/S_PACK_VIEW_DHU-NEW_LINE, sy-vline,
  WA_/SCWM/S_PACK_VIEW_DHU-LGPLA, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_PACK_VIEW_DHU 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_PACK_VIEW_DHU 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_PACK_VIEW_DHU INTO WA_/SCWM/S_PACK_VIEW_DHU.


*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 HUID, internal->external for field HUIDENT
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_PACK_VIEW_DHU-HUIDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_PACK_VIEW_DHU-HUIDENT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_PACK_VIEW_DHU-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_PACK_VIEW_DHU-UNIT.
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_PACK_VIEW_DHU_STR, 
GUID_HU TYPE STRING,
HUIDENT TYPE STRING,
DSTGRP TYPE STRING,
PMAT TYPE STRING,
PMAT_GUID TYPE STRING,
QUAN TYPE STRING,
ICON_CREATE TYPE STRING,
UNIT TYPE STRING,
NEW_LINE TYPE STRING,
LGPLA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_PACK_VIEW_DHU_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_PACK_VIEW_DHU_STR-GUID_HU sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-HUIDENT sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-DSTGRP sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-PMAT sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-PMAT_GUID sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-QUAN sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-ICON_CREATE sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-UNIT sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-NEW_LINE sy-vline 
WA_/SCWM/S_PACK_VIEW_DHU_STR-LGPLA sy-vline      INTO ld_text SEPARATED BY SPACE.

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