ABAP Select data from SAP table IEWMWHOHU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEWMWHOHU
*  INTO TABLE @DATA(IT_IEWMWHOHU2).
*--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_IEWMWHOHU INDEX 1 INTO DATA(WA_IEWMWHOHU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEWMWHOHU>-CLIENT = 1.
<IEWMWHOHU>-WAREHOUSE = 1.
<IEWMWHOHU>-WAREHOUSEORDER = 1.
<IEWMWHOHU>-HNDLGUNITNUMBERINWHSEORDER = 1.
<IEWMWHOHU>-PACKAGINGMATERIALUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEWMWHOHU-PACKAGINGMATERIAL, sy-vline,
  WA_IEWMWHOHU-LANGUAGE, sy-vline,
  WA_IEWMWHOHU-PACKAGINGMATERIALDESCRIPTION, sy-vline,
  WA_IEWMWHOHU-HANDLINGUNITUUID, sy-vline,
  WA_IEWMWHOHU-HANDLINGUNITNUMBER, sy-vline,
  WA_IEWMWHOHU-HNDLGUNITISSHIPPINGHNDLGUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEWMWHOHU 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_IEWMWHOHU 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_IEWMWHOHU INTO WA_IEWMWHOHU.


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

*Conversion exit MDLPD, internal->external for field PACKAGINGMATERIALUUID
CALL FUNCTION 'CONVERSION_EXIT_MDLPD_OUTPUT'
  EXPORTING
    input =                      WA_IEWMWHOHU-PACKAGINGMATERIALUUID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWMWHOHU-PACKAGINGMATERIALUUID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IEWMWHOHU-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWMWHOHU-LANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit HUID, internal->external for field HANDLINGUNITNUMBER
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_IEWMWHOHU-HANDLINGUNITNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWMWHOHU-HANDLINGUNITNUMBER.
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_IEWMWHOHU_STR, 
CLIENT TYPE STRING,
WAREHOUSE TYPE STRING,
WAREHOUSEORDER TYPE STRING,
HNDLGUNITNUMBERINWHSEORDER TYPE STRING,
PACKAGINGMATERIALUUID TYPE STRING,
PACKAGINGMATERIAL TYPE STRING,
LANGUAGE TYPE STRING,
PACKAGINGMATERIALDESCRIPTION TYPE STRING,
HANDLINGUNITUUID TYPE STRING,
HANDLINGUNITNUMBER TYPE STRING,
HNDLGUNITISSHIPPINGHNDLGUNIT TYPE STRING,
HNDLGUNITISCREATEDBYWHSEORDER TYPE STRING,
STORAGEPROCESS TYPE STRING,
CONSOLIDATIONGROUP TYPE STRING,
STORAGETYPE TYPE STRING,
STORAGESECTION TYPE STRING,
STORAGEBIN TYPE STRING,
WAREHOUSEORDERCREATIONRULE TYPE STRING,
HNDLGUNITISUSEDINWHSEORDER TYPE STRING,
PLANNEDSHIPPINGHNDLGUNITUUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEWMWHOHU_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_IEWMWHOHU_STR-CLIENT sy-vline 
WA_IEWMWHOHU_STR-WAREHOUSE sy-vline 
WA_IEWMWHOHU_STR-WAREHOUSEORDER sy-vline 
WA_IEWMWHOHU_STR-HNDLGUNITNUMBERINWHSEORDER sy-vline 
WA_IEWMWHOHU_STR-PACKAGINGMATERIALUUID sy-vline 
WA_IEWMWHOHU_STR-PACKAGINGMATERIAL sy-vline 
WA_IEWMWHOHU_STR-LANGUAGE sy-vline 
WA_IEWMWHOHU_STR-PACKAGINGMATERIALDESCRIPTION sy-vline 
WA_IEWMWHOHU_STR-HANDLINGUNITUUID sy-vline 
WA_IEWMWHOHU_STR-HANDLINGUNITNUMBER sy-vline 
WA_IEWMWHOHU_STR-HNDLGUNITISSHIPPINGHNDLGUNIT sy-vline 
WA_IEWMWHOHU_STR-HNDLGUNITISCREATEDBYWHSEORDER sy-vline 
WA_IEWMWHOHU_STR-STORAGEPROCESS sy-vline 
WA_IEWMWHOHU_STR-CONSOLIDATIONGROUP sy-vline 
WA_IEWMWHOHU_STR-STORAGETYPE sy-vline 
WA_IEWMWHOHU_STR-STORAGESECTION sy-vline 
WA_IEWMWHOHU_STR-STORAGEBIN sy-vline 
WA_IEWMWHOHU_STR-WAREHOUSEORDERCREATIONRULE sy-vline 
WA_IEWMWHOHU_STR-HNDLGUNITISUSEDINWHSEORDER sy-vline 
WA_IEWMWHOHU_STR-PLANNEDSHIPPINGHNDLGUNITUUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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