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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/HU_DLV
*  INTO TABLE @DATA(IT_/SCWM/HU_DLV2).
*--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/HU_DLV INDEX 1 INTO DATA(WA_/SCWM/HU_DLV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/HU_DLV>-MANDT = 1.
</SCWM/HU_DLV>-LGNUM = 1.
</SCWM/HU_DLV>-HUIDENT = 1.
</SCWM/HU_DLV>-DOCCAT = 1.
</SCWM/HU_DLV>-DOCNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/HU_DLV-COUNTER, sy-vline,
  WA_/SCWM/HU_DLV-REFBSKEY, sy-vline,
  WA_/SCWM/HU_DLV-REFDOCCAT, sy-vline,
  WA_/SCWM/HU_DLV-REFDOCNO, sy-vline,
  WA_/SCWM/HU_DLV-REVERSED, sy-vline,
  WA_/SCWM/HU_DLV-PHYSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/HU_DLV 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/HU_DLV 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/HU_DLV INTO WA_/SCWM/HU_DLV.


*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/HU_DLV-HUIDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/HU_DLV-HUIDENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/HU_DLV-DOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/HU_DLV-DOCNO.
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/HU_DLV_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
HUIDENT TYPE STRING,
DOCCAT TYPE STRING,
DOCNO TYPE STRING,
COUNTER TYPE STRING,
REFBSKEY TYPE STRING,
REFDOCCAT TYPE STRING,
REFDOCNO TYPE STRING,
REVERSED TYPE STRING,
PHYSTAT TYPE STRING,
CONFIRMED_AT TYPE STRING,
EEW_HU_DLV TYPE STRING,
GUID_HU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/HU_DLV_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/HU_DLV_STR-MANDT sy-vline 
WA_/SCWM/HU_DLV_STR-LGNUM sy-vline 
WA_/SCWM/HU_DLV_STR-HUIDENT sy-vline 
WA_/SCWM/HU_DLV_STR-DOCCAT sy-vline 
WA_/SCWM/HU_DLV_STR-DOCNO sy-vline 
WA_/SCWM/HU_DLV_STR-COUNTER sy-vline 
WA_/SCWM/HU_DLV_STR-REFBSKEY sy-vline 
WA_/SCWM/HU_DLV_STR-REFDOCCAT sy-vline 
WA_/SCWM/HU_DLV_STR-REFDOCNO sy-vline 
WA_/SCWM/HU_DLV_STR-REVERSED sy-vline 
WA_/SCWM/HU_DLV_STR-PHYSTAT sy-vline 
WA_/SCWM/HU_DLV_STR-CONFIRMED_AT sy-vline 
WA_/SCWM/HU_DLV_STR-EEW_HU_DLV sy-vline 
WA_/SCWM/HU_DLV_STR-GUID_HU sy-vline      INTO ld_text SEPARATED BY SPACE.

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