ABAP Select data from SAP table WDL_ASH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDL_ASH
*  INTO TABLE @DATA(IT_WDL_ASH2).
*--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_WDL_ASH INDEX 1 INTO DATA(WA_WDL_ASH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WDL_ASH>-MATNR = 1.
<WDL_ASH>-BBTYP = 1.
<WDL_ASH>-MTART = 1.
<WDL_ASH>-ATTYP = 1.
<WDL_ASH>-MATKL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WDL_ASH-SATNR, sy-vline,
  WA_WDL_ASH-ABTNR, sy-vline,
  WA_WDL_ASH-LAYVR, sy-vline,
  WA_WDL_ASH-LNLGV, sy-vline,
  WA_WDL_ASH-LAYGR, sy-vline,
  WA_WDL_ASH-LMVER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WDL_ASH 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_WDL_ASH 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_WDL_ASH INTO WA_WDL_ASH.


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

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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WDL_ASH-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WDL_ASH-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WDL_ASH-INFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WDL_ASH-INFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKTIO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WDL_ASH-AKTIO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WDL_ASH-AKTIO.
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_WDL_ASH_STR, 
MATNR TYPE STRING,
BBTYP TYPE STRING,
MTART TYPE STRING,
ATTYP TYPE STRING,
MATKL TYPE STRING,
SATNR TYPE STRING,
ABTNR TYPE STRING,
LAYVR TYPE STRING,
LNLGV TYPE STRING,
LAYGR TYPE STRING,
LMVER TYPE STRING,
LMVAR TYPE STRING,
SORF1 TYPE STRING,
FACIN TYPE STRING,
SHELF TYPE STRING,
MEVOR TYPE STRING,
MELAY TYPE STRING,
HPLGR TYPE STRING,
LIFNR TYPE STRING,
INFNR TYPE STRING,
LTSNR TYPE STRING,
LTSSF TYPE STRING,
NRLIF TYPE STRING,
AKTIO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDL_ASH_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_WDL_ASH_STR-MATNR sy-vline 
WA_WDL_ASH_STR-BBTYP sy-vline 
WA_WDL_ASH_STR-MTART sy-vline 
WA_WDL_ASH_STR-ATTYP sy-vline 
WA_WDL_ASH_STR-MATKL sy-vline 
WA_WDL_ASH_STR-SATNR sy-vline 
WA_WDL_ASH_STR-ABTNR sy-vline 
WA_WDL_ASH_STR-LAYVR sy-vline 
WA_WDL_ASH_STR-LNLGV sy-vline 
WA_WDL_ASH_STR-LAYGR sy-vline 
WA_WDL_ASH_STR-LMVER sy-vline 
WA_WDL_ASH_STR-LMVAR sy-vline 
WA_WDL_ASH_STR-SORF1 sy-vline 
WA_WDL_ASH_STR-FACIN sy-vline 
WA_WDL_ASH_STR-SHELF sy-vline 
WA_WDL_ASH_STR-MEVOR sy-vline 
WA_WDL_ASH_STR-MELAY sy-vline 
WA_WDL_ASH_STR-HPLGR sy-vline 
WA_WDL_ASH_STR-LIFNR sy-vline 
WA_WDL_ASH_STR-INFNR sy-vline 
WA_WDL_ASH_STR-LTSNR sy-vline 
WA_WDL_ASH_STR-LTSSF sy-vline 
WA_WDL_ASH_STR-NRLIF sy-vline 
WA_WDL_ASH_STR-AKTIO sy-vline      INTO ld_text SEPARATED BY SPACE.

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