ABAP Select data from SAP table IEWMHUITEMLOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEWMHUITEMLOG
*  INTO TABLE @DATA(IT_IEWMHUITEMLOG2).
*--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_IEWMHUITEMLOG INDEX 1 INTO DATA(WA_IEWMHUITEMLOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEWMHUITEMLOG>-MANDT = 1.
<IEWMHUITEMLOG>-HANDLINGUNITLOGUUID = 1.
<IEWMHUITEMLOG>-PARENTHANDLINGUNITUUID = 1.
<IEWMHUITEMLOG>-STOCKITEMUUID = 1.
<IEWMHUITEMLOG>-CURRENTNUMBEROFKEYTABLE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEWMHUITEMLOG-DELIVERYCATEGORY, sy-vline,
  WA_IEWMHUITEMLOG-EWMDELIVERYDOCUMENTCATEGORY, sy-vline,
  WA_IEWMHUITEMLOG-DELIVERYUUID, sy-vline,
  WA_IEWMHUITEMLOG-DELIVERYITEMUUID, sy-vline,
  WA_IEWMHUITEMLOG-HANDLINGUNITQUANTITY, sy-vline,
  WA_IEWMHUITEMLOG-HANDLINGUNITBASEUNITOFMEASURE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEWMHUITEMLOG 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_IEWMHUITEMLOG 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_IEWMHUITEMLOG INTO WA_IEWMHUITEMLOG.


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

*Conversion exit CUNIT, internal->external for field HANDLINGUNITALTUNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IEWMHUITEMLOG-HANDLINGUNITALTUNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWMHUITEMLOG-HANDLINGUNITALTUNITOFMEASURE.
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_IEWMHUITEMLOG_STR, 
MANDT TYPE STRING,
HANDLINGUNITLOGUUID TYPE STRING,
PARENTHANDLINGUNITUUID TYPE STRING,
STOCKITEMUUID TYPE STRING,
CURRENTNUMBEROFKEYTABLE TYPE STRING,
DELIVERYCATEGORY TYPE STRING,
EWMDELIVERYDOCUMENTCATEGORY TYPE STRING,
DELIVERYUUID TYPE STRING,
DELIVERYITEMUUID TYPE STRING,
HANDLINGUNITQUANTITY TYPE STRING,
HANDLINGUNITBASEUNITOFMEASURE TYPE STRING,
HANDLINGUNITALTUNITOFMEASURE TYPE STRING,
SHELFLIFEEXPIRATIONDATE TYPE STRING,
GOODSRECEIPTUTCDATETIME TYPE STRING,
COUNTRYOFORIGIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEWMHUITEMLOG_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_IEWMHUITEMLOG_STR-MANDT sy-vline 
WA_IEWMHUITEMLOG_STR-HANDLINGUNITLOGUUID sy-vline 
WA_IEWMHUITEMLOG_STR-PARENTHANDLINGUNITUUID sy-vline 
WA_IEWMHUITEMLOG_STR-STOCKITEMUUID sy-vline 
WA_IEWMHUITEMLOG_STR-CURRENTNUMBEROFKEYTABLE sy-vline 
WA_IEWMHUITEMLOG_STR-DELIVERYCATEGORY sy-vline 
WA_IEWMHUITEMLOG_STR-EWMDELIVERYDOCUMENTCATEGORY sy-vline 
WA_IEWMHUITEMLOG_STR-DELIVERYUUID sy-vline 
WA_IEWMHUITEMLOG_STR-DELIVERYITEMUUID sy-vline 
WA_IEWMHUITEMLOG_STR-HANDLINGUNITQUANTITY sy-vline 
WA_IEWMHUITEMLOG_STR-HANDLINGUNITBASEUNITOFMEASURE sy-vline 
WA_IEWMHUITEMLOG_STR-HANDLINGUNITALTUNITOFMEASURE sy-vline 
WA_IEWMHUITEMLOG_STR-SHELFLIFEEXPIRATIONDATE sy-vline 
WA_IEWMHUITEMLOG_STR-GOODSRECEIPTUTCDATETIME sy-vline 
WA_IEWMHUITEMLOG_STR-COUNTRYOFORIGIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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