ABAP Select data from SAP table HUWM_INITIAL_LOAD_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HUWM_INITIAL_LOAD_ITEM
*  INTO TABLE @DATA(IT_HUWM_INITIAL_LOAD_ITEM2).
*--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_HUWM_INITIAL_LOAD_ITEM INDEX 1 INTO DATA(WA_HUWM_INITIAL_LOAD_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HUWM_INITIAL_LOAD_ITEM>-SUB_HU_EXIDV = 1.
<HUWM_INITIAL_LOAD_ITEM>-QUANTITY = 1.
<HUWM_INITIAL_LOAD_ITEM>-ALTME = 1.
<HUWM_INITIAL_LOAD_ITEM>-MATNR = 1.
<HUWM_INITIAL_LOAD_ITEM>-CHARG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HUWM_INITIAL_LOAD_ITEM-WERKS, sy-vline,
  WA_HUWM_INITIAL_LOAD_ITEM-LGORT, sy-vline,
  WA_HUWM_INITIAL_LOAD_ITEM-BESTQ, sy-vline,
  WA_HUWM_INITIAL_LOAD_ITEM-SOBKZ, sy-vline,
  WA_HUWM_INITIAL_LOAD_ITEM-SONUM, sy-vline,
  WA_HUWM_INITIAL_LOAD_ITEM-WDATU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HUWM_INITIAL_LOAD_ITEM 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_HUWM_INITIAL_LOAD_ITEM 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_HUWM_INITIAL_LOAD_ITEM INTO WA_HUWM_INITIAL_LOAD_ITEM.


*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 SUB_HU_EXIDV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HUWM_INITIAL_LOAD_ITEM-SUB_HU_EXIDV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUWM_INITIAL_LOAD_ITEM-SUB_HU_EXIDV.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HUWM_INITIAL_LOAD_ITEM-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUWM_INITIAL_LOAD_ITEM-SONUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/ALTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_HUWM_INITIAL_LOAD_ITEM-/CWM/ALTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUWM_INITIAL_LOAD_ITEM-/CWM/ALTME.
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_HUWM_INITIAL_LOAD_ITEM_STR, 
SUB_HU_EXIDV TYPE STRING,
QUANTITY TYPE STRING,
ALTME TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
WDATU TYPE STRING,
VFDAT TYPE STRING,
ZEUGN TYPE STRING,
KZBEI TYPE STRING,
ANZSN TYPE STRING,
BWART TYPE STRING,
ITEM_ZEILE TYPE STRING,
HSDAT TYPE STRING,
/CWM/QUANTITY TYPE STRING,
/CWM/ALTME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HUWM_INITIAL_LOAD_ITEM_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_HUWM_INITIAL_LOAD_ITEM_STR-SUB_HU_EXIDV sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-QUANTITY sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-ALTME sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-MATNR sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-CHARG sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-WERKS sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-LGORT sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-BESTQ sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-SOBKZ sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-SONUM sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-WDATU sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-VFDAT sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-ZEUGN sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-KZBEI sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-ANZSN sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-BWART sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-ITEM_ZEILE sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-HSDAT sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-/CWM/QUANTITY sy-vline 
WA_HUWM_INITIAL_LOAD_ITEM_STR-/CWM/ALTME sy-vline      INTO ld_text SEPARATED BY SPACE.

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