ABAP Select data from SAP table /SCWM/S_WHOHU into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/S_WHOHU 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 /SCWM/S_WHOHU. 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 /SCWM/S_WHOHU 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_/SCWM/S_WHOHU TYPE STANDARD TABLE OF /SCWM/S_WHOHU,
      WA_/SCWM/S_WHOHU TYPE /SCWM/S_WHOHU,
      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: </SCWM/S_WHOHU> TYPE /SCWM/S_WHOHU.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/S_WHOHU
  INTO TABLE IT_/SCWM/S_WHOHU.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_WHOHU
*  INTO TABLE @DATA(IT_/SCWM/S_WHOHU2).
*--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_/SCWM/S_WHOHU INDEX 1 INTO DATA(WA_/SCWM/S_WHOHU2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/S_WHOHU ASSIGNING </SCWM/S_WHOHU>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_WHOHU>-MANDT = 1.
</SCWM/S_WHOHU>-LGNUM = 1.
</SCWM/S_WHOHU>-WHO = 1.
</SCWM/S_WHOHU>-HUKNG = 1.
</SCWM/S_WHOHU>-PMAT_GUID = 1.

ENDLOOP.

LOOP AT IT_/SCWM/S_WHOHU INTO WA_/SCWM/S_WHOHU.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_WHOHU-HUID, sy-vline,
  WA_/SCWM/S_WHOHU-HUIDENT, sy-vline,
  WA_/SCWM/S_WHOHU-SHIPHU, sy-vline,
  WA_/SCWM/S_WHOHU-FLGWCR, sy-vline,
  WA_/SCWM/S_WHOHU-PRCES, sy-vline,
  WA_/SCWM/S_WHOHU-DSTGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_WHOHU 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_/SCWM/S_WHOHU 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_/SCWM/S_WHOHU INTO WA_/SCWM/S_WHOHU.


*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 ALPH0, internal->external for field WHO
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WHOHU-WHO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WHOHU-WHO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit HUID, internal->external for field HUIDENT
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WHOHU-HUIDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WHOHU-HUIDENT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit HUID, internal->external for field POHU_ID
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WHOHU-POHU_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WHOHU-POHU_ID.
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_/SCWM/S_WHOHU_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
WHO TYPE STRING,
HUKNG TYPE STRING,
PMAT_GUID TYPE STRING,
HUID TYPE STRING,
HUIDENT TYPE STRING,
SHIPHU TYPE STRING,
FLGWCR TYPE STRING,
PRCES TYPE STRING,
DSTGRP TYPE STRING,
WSTYP TYPE STRING,
WSSEC TYPE STRING,
WSBIN TYPE STRING,
WCR TYPE STRING,
USED TYPE STRING,
POHU_GUID TYPE STRING,
UPDKZ TYPE STRING,
LGTYP TYPE STRING,
LGBER TYPE STRING,
LGPLA TYPE STRING,
MAX_WEIGHT TYPE STRING,
UNIT_GW TYPE STRING,
MAX_VOLUME TYPE STRING,
UNIT_GV TYPE STRING,
MAX_LENGTH TYPE STRING,
MAX_WIDTH TYPE STRING,
MAX_HEIGHT TYPE STRING,
UNIT_MAX_LWH TYPE STRING,
MAX_CAPA TYPE STRING,
TRART TYPE STRING,
POHU_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_WHOHU_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_/SCWM/S_WHOHU_STR-MANDT sy-vline 
WA_/SCWM/S_WHOHU_STR-LGNUM sy-vline 
WA_/SCWM/S_WHOHU_STR-WHO sy-vline 
WA_/SCWM/S_WHOHU_STR-HUKNG sy-vline 
WA_/SCWM/S_WHOHU_STR-PMAT_GUID sy-vline 
WA_/SCWM/S_WHOHU_STR-HUID sy-vline 
WA_/SCWM/S_WHOHU_STR-HUIDENT sy-vline 
WA_/SCWM/S_WHOHU_STR-SHIPHU sy-vline 
WA_/SCWM/S_WHOHU_STR-FLGWCR sy-vline 
WA_/SCWM/S_WHOHU_STR-PRCES sy-vline 
WA_/SCWM/S_WHOHU_STR-DSTGRP sy-vline 
WA_/SCWM/S_WHOHU_STR-WSTYP sy-vline 
WA_/SCWM/S_WHOHU_STR-WSSEC sy-vline 
WA_/SCWM/S_WHOHU_STR-WSBIN sy-vline 
WA_/SCWM/S_WHOHU_STR-WCR sy-vline 
WA_/SCWM/S_WHOHU_STR-USED sy-vline 
WA_/SCWM/S_WHOHU_STR-POHU_GUID sy-vline 
WA_/SCWM/S_WHOHU_STR-UPDKZ sy-vline 
WA_/SCWM/S_WHOHU_STR-LGTYP sy-vline 
WA_/SCWM/S_WHOHU_STR-LGBER sy-vline 
WA_/SCWM/S_WHOHU_STR-LGPLA sy-vline 
WA_/SCWM/S_WHOHU_STR-MAX_WEIGHT sy-vline 
WA_/SCWM/S_WHOHU_STR-UNIT_GW sy-vline 
WA_/SCWM/S_WHOHU_STR-MAX_VOLUME sy-vline 
WA_/SCWM/S_WHOHU_STR-UNIT_GV sy-vline 
WA_/SCWM/S_WHOHU_STR-MAX_LENGTH sy-vline 
WA_/SCWM/S_WHOHU_STR-MAX_WIDTH sy-vline 
WA_/SCWM/S_WHOHU_STR-MAX_HEIGHT sy-vline 
WA_/SCWM/S_WHOHU_STR-UNIT_MAX_LWH sy-vline 
WA_/SCWM/S_WHOHU_STR-MAX_CAPA sy-vline 
WA_/SCWM/S_WHOHU_STR-TRART sy-vline 
WA_/SCWM/S_WHOHU_STR-POHU_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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