ABAP Select data from SAP table WLAY_ASSORTMENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLAY_ASSORTMENT
*  INTO TABLE @DATA(IT_WLAY_ASSORTMENT2).
*--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_WLAY_ASSORTMENT INDEX 1 INTO DATA(WA_WLAY_ASSORTMENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLAY_ASSORTMENT>-ASSORTMENT = 1.
<WLAY_ASSORTMENT>-MANDT = 1.
<WLAY_ASSORTMENT>-ASORT = 1.
<WLAY_ASSORTMENT>-STATU = 1.
<WLAY_ASSORTMENT>-KZLIK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLAY_ASSORTMENT-NLMATFB, sy-vline,
  WA_WLAY_ASSORTMENT-VKORG, sy-vline,
  WA_WLAY_ASSORTMENT-VTWEG, sy-vline,
  WA_WLAY_ASSORTMENT-LSTFL, sy-vline,
  WA_WLAY_ASSORTMENT-DATAB, sy-vline,
  WA_WLAY_ASSORTMENT-DATBI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLAY_ASSORTMENT 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_WLAY_ASSORTMENT 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_WLAY_ASSORTMENT INTO WA_WLAY_ASSORTMENT.


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

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

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_WLAY_ASSORTMENT-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLAY_ASSORTMENT-SPRAS.
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_WLAY_ASSORTMENT_STR, 
ASSORTMENT TYPE STRING,
MANDT TYPE STRING,
ASORT TYPE STRING,
STATU TYPE STRING,
KZLIK TYPE STRING,
NLMATFB TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
LSTFL TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
KOPRO TYPE STRING,
LAYPR TYPE STRING,
SOTYP TYPE STRING,
LAYVR TYPE STRING,
POSDS TYPE STRING,
EXCLU TYPE STRING,
CATEGORY TYPE STRING,
LAY_LIST_UTIME TYPE STRING,
HIER_ID TYPE STRING,
ASSORTYP TYPE STRING,
ASSORDIMVAL1 TYPE STRING,
ASSORDIMVAL2 TYPE STRING,
ASSORDIMVAL3 TYPE STRING,
LAYGR TYPE STRING,
AEDAT TYPE STRING,
ASSORTMENT_DESCR TYPE STRING,
ASSORTMENT_DIM1_DESCR TYPE STRING,
MANDT TYPE STRING,
ASSORDIM TYPE STRING,
ASSORDIMVAL TYPE STRING,
SPRAS TYPE STRING,
VTEXT TYPE STRING,
ASSORTMENT_DIM2_DESCR TYPE STRING,
MANDT TYPE STRING,
ASSORDIM TYPE STRING,
ASSORDIMVAL TYPE STRING,
SPRAS TYPE STRING,
VTEXT TYPE STRING,
ASSORTMENT_DIM3_DESCR TYPE STRING,
MANDT TYPE STRING,
ASSORDIM TYPE STRING,
ASSORDIMVAL TYPE STRING,
SPRAS TYPE STRING,
VTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLAY_ASSORTMENT_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_WLAY_ASSORTMENT_STR-ASSORTMENT sy-vline 
WA_WLAY_ASSORTMENT_STR-MANDT sy-vline 
WA_WLAY_ASSORTMENT_STR-ASORT sy-vline 
WA_WLAY_ASSORTMENT_STR-STATU sy-vline 
WA_WLAY_ASSORTMENT_STR-KZLIK sy-vline 
WA_WLAY_ASSORTMENT_STR-NLMATFB sy-vline 
WA_WLAY_ASSORTMENT_STR-VKORG sy-vline 
WA_WLAY_ASSORTMENT_STR-VTWEG sy-vline 
WA_WLAY_ASSORTMENT_STR-LSTFL sy-vline 
WA_WLAY_ASSORTMENT_STR-DATAB sy-vline 
WA_WLAY_ASSORTMENT_STR-DATBI sy-vline 
WA_WLAY_ASSORTMENT_STR-KOPRO sy-vline 
WA_WLAY_ASSORTMENT_STR-LAYPR sy-vline 
WA_WLAY_ASSORTMENT_STR-SOTYP sy-vline 
WA_WLAY_ASSORTMENT_STR-LAYVR sy-vline 
WA_WLAY_ASSORTMENT_STR-POSDS sy-vline 
WA_WLAY_ASSORTMENT_STR-EXCLU sy-vline 
WA_WLAY_ASSORTMENT_STR-CATEGORY sy-vline 
WA_WLAY_ASSORTMENT_STR-LAY_LIST_UTIME sy-vline 
WA_WLAY_ASSORTMENT_STR-HIER_ID sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORTYP sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIMVAL1 sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIMVAL2 sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIMVAL3 sy-vline 
WA_WLAY_ASSORTMENT_STR-LAYGR sy-vline 
WA_WLAY_ASSORTMENT_STR-AEDAT sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORTMENT_DESCR sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORTMENT_DIM1_DESCR sy-vline 
WA_WLAY_ASSORTMENT_STR-MANDT sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIM sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIMVAL sy-vline 
WA_WLAY_ASSORTMENT_STR-SPRAS sy-vline 
WA_WLAY_ASSORTMENT_STR-VTEXT sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORTMENT_DIM2_DESCR sy-vline 
WA_WLAY_ASSORTMENT_STR-MANDT sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIM sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIMVAL sy-vline 
WA_WLAY_ASSORTMENT_STR-SPRAS sy-vline 
WA_WLAY_ASSORTMENT_STR-VTEXT sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORTMENT_DIM3_DESCR sy-vline 
WA_WLAY_ASSORTMENT_STR-MANDT sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIM sy-vline 
WA_WLAY_ASSORTMENT_STR-ASSORDIMVAL sy-vline 
WA_WLAY_ASSORTMENT_STR-SPRAS sy-vline 
WA_WLAY_ASSORTMENT_STR-VTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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