ABAP Select data from SAP table IUNITOFMEASURE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IUNITOFMEASURE
*  INTO TABLE @DATA(IT_IUNITOFMEASURE2).
*--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_IUNITOFMEASURE INDEX 1 INTO DATA(WA_IUNITOFMEASURE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IUNITOFMEASURE>-MANDT = 1.
<IUNITOFMEASURE>-UNITOFMEASURE = 1.
<IUNITOFMEASURE>-UNITOFMEASURESAPCODE = 1.
<IUNITOFMEASURE>-UNITOFMEASUREISOCODE = 1.
<IUNITOFMEASURE>-ISPRIMARYUNITFORISOCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IUNITOFMEASURE-UNITOFMEASURENUMBEROFDECIMALS, sy-vline,
  WA_IUNITOFMEASURE-UNITOFMEASUREISCOMMERCIAL, sy-vline,
  WA_IUNITOFMEASURE-UNITOFMEASUREDIMENSION, sy-vline,
  WA_IUNITOFMEASURE-SIUNITCNVRSNRATENUMERATOR, sy-vline,
  WA_IUNITOFMEASURE-SIUNITCNVRSNRATEDENOMINATOR, sy-vline,
  WA_IUNITOFMEASURE-SIUNITCNVRSNRATEEXPONENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IUNITOFMEASURE 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_IUNITOFMEASURE 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_IUNITOFMEASURE INTO WA_IUNITOFMEASURE.


*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 UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IUNITOFMEASURE-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IUNITOFMEASURE-UNITOFMEASURE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UNITOFMEASUREPRESSUREUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IUNITOFMEASURE-UNITOFMEASUREPRESSUREUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IUNITOFMEASURE-UNITOFMEASUREPRESSUREUNIT.
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_IUNITOFMEASURE_STR, 
MANDT TYPE STRING,
UNITOFMEASURE TYPE STRING,
UNITOFMEASURESAPCODE TYPE STRING,
UNITOFMEASUREISOCODE TYPE STRING,
ISPRIMARYUNITFORISOCODE TYPE STRING,
UNITOFMEASURENUMBEROFDECIMALS TYPE STRING,
UNITOFMEASUREISCOMMERCIAL TYPE STRING,
UNITOFMEASUREDIMENSION TYPE STRING,
SIUNITCNVRSNRATENUMERATOR TYPE STRING,
SIUNITCNVRSNRATEDENOMINATOR TYPE STRING,
SIUNITCNVRSNRATEEXPONENT TYPE STRING,
SIUNITCNVRSNADDITIVEVALUE TYPE STRING,
UNITOFMEASUREDSPEXPONENT TYPE STRING,
UNITOFMEASUREDSPNMBROFDCMLS TYPE STRING,
UNITOFMEASURETEMPERATURE TYPE STRING,
UNITOFMEASURETEMPERATUREUNIT TYPE STRING,
UNITOFMEASUREPRESSURE TYPE STRING,
UNITOFMEASUREPRESSUREUNIT TYPE STRING,
UNITOFMEASURE_E TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IUNITOFMEASURE_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_IUNITOFMEASURE_STR-MANDT sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASURE sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASURESAPCODE sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASUREISOCODE sy-vline 
WA_IUNITOFMEASURE_STR-ISPRIMARYUNITFORISOCODE sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASURENUMBEROFDECIMALS sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASUREISCOMMERCIAL sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASUREDIMENSION sy-vline 
WA_IUNITOFMEASURE_STR-SIUNITCNVRSNRATENUMERATOR sy-vline 
WA_IUNITOFMEASURE_STR-SIUNITCNVRSNRATEDENOMINATOR sy-vline 
WA_IUNITOFMEASURE_STR-SIUNITCNVRSNRATEEXPONENT sy-vline 
WA_IUNITOFMEASURE_STR-SIUNITCNVRSNADDITIVEVALUE sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASUREDSPEXPONENT sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASUREDSPNMBROFDCMLS sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASURETEMPERATURE sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASURETEMPERATUREUNIT sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASUREPRESSURE sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASUREPRESSUREUNIT sy-vline 
WA_IUNITOFMEASURE_STR-UNITOFMEASURE_E sy-vline      INTO ld_text SEPARATED BY SPACE.

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