ABAP Select data from SAP table LXWHS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LXWHS 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 LXWHS. 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 LXWHS 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_LXWHS TYPE STANDARD TABLE OF LXWHS,
      WA_LXWHS TYPE LXWHS,
      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: <LXWHS> TYPE LXWHS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXWHS
*  INTO TABLE @DATA(IT_LXWHS2).
*--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_LXWHS INDEX 1 INTO DATA(WA_LXWHS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXWHS>-MANDT = 1.
<LXWHS>-LGNUM = 1.
<LXWHS>-ONSTG = 1.
<LXWHS>-STTYP = 1.
<LXWHS>-OPPXD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXWHS-FFTOL, sy-vline,
  WA_LXWHS-FFUOM, sy-vline,
  WA_LXWHS-CNSFF, sy-vline,
  WA_LXWHS-TWMTC, sy-vline,
  WA_LXWHS-DTREF, sy-vline,
  WA_LXWHS-ADREL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXWHS 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_LXWHS 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_LXWHS INTO WA_LXWHS.


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

*Conversion exit CUNIT, internal->external for field WMUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LXWHS-WMUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXWHS-WMUOM.
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_LXWHS_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
ONSTG TYPE STRING,
STTYP TYPE STRING,
OPPXD TYPE STRING,
FFTOL TYPE STRING,
FFUOM TYPE STRING,
CNSFF TYPE STRING,
TWMTC TYPE STRING,
DTREF TYPE STRING,
ADREL TYPE STRING,
ALREL TYPE STRING,
WMUOM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXWHS_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_LXWHS_STR-MANDT sy-vline 
WA_LXWHS_STR-LGNUM sy-vline 
WA_LXWHS_STR-ONSTG sy-vline 
WA_LXWHS_STR-STTYP sy-vline 
WA_LXWHS_STR-OPPXD sy-vline 
WA_LXWHS_STR-FFTOL sy-vline 
WA_LXWHS_STR-FFUOM sy-vline 
WA_LXWHS_STR-CNSFF sy-vline 
WA_LXWHS_STR-TWMTC sy-vline 
WA_LXWHS_STR-DTREF sy-vline 
WA_LXWHS_STR-ADREL sy-vline 
WA_LXWHS_STR-ALREL sy-vline 
WA_LXWHS_STR-WMUOM sy-vline      INTO ld_text SEPARATED BY SPACE.

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