ABAP Select data from SAP table HUINV_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HUINV_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 HUINV_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 HUINV_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_HUINV_ITEM TYPE STANDARD TABLE OF HUINV_ITEM,
      WA_HUINV_ITEM TYPE HUINV_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: <HUINV_ITEM> TYPE HUINV_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HUINV_ITEM
*  INTO TABLE @DATA(IT_HUINV_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_HUINV_ITEM INDEX 1 INTO DATA(WA_HUINV_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HUINV_ITEM>-MANDT = 1.
<HUINV_ITEM>-HANDLE = 1.
<HUINV_ITEM>-ITEM_NR = 1.
<HUINV_ITEM>-VENUM = 1.
<HUINV_ITEM>-VEPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HUINV_ITEM-MATNR, sy-vline,
  WA_HUINV_ITEM-CHARG, sy-vline,
  WA_HUINV_ITEM-BESTQ, sy-vline,
  WA_HUINV_ITEM-HUEXIST, sy-vline,
  WA_HUINV_ITEM-HUEXISTNOT, sy-vline,
  WA_HUINV_ITEM-VHILM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HUINV_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_HUINV_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_HUINV_ITEM INTO WA_HUINV_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 VENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HUINV_ITEM-VENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUINV_ITEM-VENUM.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_HUINV_ITEM-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUINV_ITEM-MJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field /CWM/ALTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_HUINV_ITEM-/CWM/ALTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUINV_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_HUINV_ITEM_STR, 
MANDT TYPE STRING,
HANDLE TYPE STRING,
ITEM_NR TYPE STRING,
VENUM TYPE STRING,
VEPOS TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
HUEXIST TYPE STRING,
HUEXISTNOT TYPE STRING,
VHILM TYPE STRING,
EXIDV TYPE STRING,
TOP_EXIDV TYPE STRING,
VEMNG TYPE STRING,
MEINS TYPE STRING,
QUANTITY TYPE STRING,
ALTME TYPE STRING,
HUINV_NULL TYPE STRING,
IVPOS TYPE STRING,
LGNUM TYPE STRING,
GRUND TYPE STRING,
COUNT_NR TYPE STRING,
CHANGE_USER TYPE STRING,
CHANGE_DATE TYPE STRING,
CHANGE_TIME TYPE STRING,
COUNTED TYPE STRING,
DELETED TYPE STRING,
POSTED TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLPO TYPE STRING,
FLAG_SNR TYPE STRING,
UEVEL TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
/CWM/VEMNG TYPE STRING,
/CWM/VEMEH TYPE STRING,
/CWM/QUANTITY TYPE STRING,
/CWM/ALTME TYPE STRING,
SGT_SCAT TYPE STRING,
WRF_CHARSTC1 TYPE STRING,
WRF_CHARSTC2 TYPE STRING,
WRF_CHARSTC3 TYPE STRING,
WRF_CHARSTC1_TXT TYPE STRING,
WRF_CHARSTC2_TXT TYPE STRING,
WRF_CHARSTC3_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HUINV_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_HUINV_ITEM_STR-MANDT sy-vline 
WA_HUINV_ITEM_STR-HANDLE sy-vline 
WA_HUINV_ITEM_STR-ITEM_NR sy-vline 
WA_HUINV_ITEM_STR-VENUM sy-vline 
WA_HUINV_ITEM_STR-VEPOS sy-vline 
WA_HUINV_ITEM_STR-MATNR sy-vline 
WA_HUINV_ITEM_STR-CHARG sy-vline 
WA_HUINV_ITEM_STR-BESTQ sy-vline 
WA_HUINV_ITEM_STR-HUEXIST sy-vline 
WA_HUINV_ITEM_STR-HUEXISTNOT sy-vline 
WA_HUINV_ITEM_STR-VHILM sy-vline 
WA_HUINV_ITEM_STR-EXIDV sy-vline 
WA_HUINV_ITEM_STR-TOP_EXIDV sy-vline 
WA_HUINV_ITEM_STR-VEMNG sy-vline 
WA_HUINV_ITEM_STR-MEINS sy-vline 
WA_HUINV_ITEM_STR-QUANTITY sy-vline 
WA_HUINV_ITEM_STR-ALTME sy-vline 
WA_HUINV_ITEM_STR-HUINV_NULL sy-vline 
WA_HUINV_ITEM_STR-IVPOS sy-vline 
WA_HUINV_ITEM_STR-LGNUM sy-vline 
WA_HUINV_ITEM_STR-GRUND sy-vline 
WA_HUINV_ITEM_STR-COUNT_NR sy-vline 
WA_HUINV_ITEM_STR-CHANGE_USER sy-vline 
WA_HUINV_ITEM_STR-CHANGE_DATE sy-vline 
WA_HUINV_ITEM_STR-CHANGE_TIME sy-vline 
WA_HUINV_ITEM_STR-COUNTED sy-vline 
WA_HUINV_ITEM_STR-DELETED sy-vline 
WA_HUINV_ITEM_STR-POSTED sy-vline 
WA_HUINV_ITEM_STR-MBLNR sy-vline 
WA_HUINV_ITEM_STR-MJAHR sy-vline 
WA_HUINV_ITEM_STR-MBLPO sy-vline 
WA_HUINV_ITEM_STR-FLAG_SNR sy-vline 
WA_HUINV_ITEM_STR-UEVEL sy-vline 
WA_HUINV_ITEM_STR-SOBKZ sy-vline 
WA_HUINV_ITEM_STR-SONUM sy-vline 
WA_HUINV_ITEM_STR-/CWM/VEMNG sy-vline 
WA_HUINV_ITEM_STR-/CWM/VEMEH sy-vline 
WA_HUINV_ITEM_STR-/CWM/QUANTITY sy-vline 
WA_HUINV_ITEM_STR-/CWM/ALTME sy-vline 
WA_HUINV_ITEM_STR-SGT_SCAT sy-vline 
WA_HUINV_ITEM_STR-WRF_CHARSTC1 sy-vline 
WA_HUINV_ITEM_STR-WRF_CHARSTC2 sy-vline 
WA_HUINV_ITEM_STR-WRF_CHARSTC3 sy-vline 
WA_HUINV_ITEM_STR-WRF_CHARSTC1_TXT sy-vline 
WA_HUINV_ITEM_STR-WRF_CHARSTC2_TXT sy-vline 
WA_HUINV_ITEM_STR-WRF_CHARSTC3_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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