ABAP Select data from SAP table WES_S_MERCHANDISE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WES_S_MERCHANDISE
*  INTO TABLE @DATA(IT_WES_S_MERCHANDISE2).
*--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_WES_S_MERCHANDISE INDEX 1 INTO DATA(WA_WES_S_MERCHANDISE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WES_S_MERCHANDISE>-MATNR = 1.
<WES_S_MERCHANDISE>-MTART = 1.
<WES_S_MERCHANDISE>-ATTYP = 1.
<WES_S_MERCHANDISE>-MLGUT = 1.
<WES_S_MERCHANDISE>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WES_S_MERCHANDISE-KUNNR, sy-vline,
  WA_WES_S_MERCHANDISE-VKORG, sy-vline,
  WA_WES_S_MERCHANDISE-VTWEG, sy-vline,
  WA_WES_S_MERCHANDISE-POSPC, sy-vline,
  WA_WES_S_MERCHANDISE-KWDHT, sy-vline,
  WA_WES_S_MERCHANDISE-PRERF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WES_S_MERCHANDISE 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_WES_S_MERCHANDISE 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_WES_S_MERCHANDISE INTO WA_WES_S_MERCHANDISE.


*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_WES_S_MERCHANDISE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WES_S_MERCHANDISE-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_WES_S_MERCHANDISE-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WES_S_MERCHANDISE-EAN11.
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_WES_S_MERCHANDISE_STR, 
MATNR TYPE STRING,
MTART TYPE STRING,
ATTYP TYPE STRING,
MLGUT TYPE STRING,
WERKS TYPE STRING,
KUNNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
POSPC TYPE STRING,
KWDHT TYPE STRING,
PRERF TYPE STRING,
RBZUL TYPE STRING,
SCAGR TYPE STRING,
PRIMW TYPE STRING,
ARANZ TYPE STRING,
MAKTX_TAB TYPE STRING,
MEAN_TAB TYPE STRING,
MARM_TAB TYPE STRING,
MARM_CONV_TAB TYPE STRING,
PROD_TAB TYPE STRING,
REF_MATERIAL TYPE STRING,
MATNR TYPE STRING,
EAN11 TYPE STRING,
PROPERTY_VALUES TYPE STRING,
COLOR_TAB TYPE STRING,
SIZE1_TAB TYPE STRING,
SIZE2_TAB TYPE STRING,
MAMT_TAB TYPE STRING,
TAX_TAB TYPE STRING,
EBOM TYPE STRING,
MMBOM TYPE STRING,
PROC_PRICES_TAB TYPE STRING,
SALES_PRICES_TAB TYPE STRING,
CHGID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WES_S_MERCHANDISE_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_WES_S_MERCHANDISE_STR-MATNR sy-vline 
WA_WES_S_MERCHANDISE_STR-MTART sy-vline 
WA_WES_S_MERCHANDISE_STR-ATTYP sy-vline 
WA_WES_S_MERCHANDISE_STR-MLGUT sy-vline 
WA_WES_S_MERCHANDISE_STR-WERKS sy-vline 
WA_WES_S_MERCHANDISE_STR-KUNNR sy-vline 
WA_WES_S_MERCHANDISE_STR-VKORG sy-vline 
WA_WES_S_MERCHANDISE_STR-VTWEG sy-vline 
WA_WES_S_MERCHANDISE_STR-POSPC sy-vline 
WA_WES_S_MERCHANDISE_STR-KWDHT sy-vline 
WA_WES_S_MERCHANDISE_STR-PRERF sy-vline 
WA_WES_S_MERCHANDISE_STR-RBZUL sy-vline 
WA_WES_S_MERCHANDISE_STR-SCAGR sy-vline 
WA_WES_S_MERCHANDISE_STR-PRIMW sy-vline 
WA_WES_S_MERCHANDISE_STR-ARANZ sy-vline 
WA_WES_S_MERCHANDISE_STR-MAKTX_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-MEAN_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-MARM_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-MARM_CONV_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-PROD_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-REF_MATERIAL sy-vline 
WA_WES_S_MERCHANDISE_STR-MATNR sy-vline 
WA_WES_S_MERCHANDISE_STR-EAN11 sy-vline 
WA_WES_S_MERCHANDISE_STR-PROPERTY_VALUES sy-vline 
WA_WES_S_MERCHANDISE_STR-COLOR_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-SIZE1_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-SIZE2_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-MAMT_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-TAX_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-EBOM sy-vline 
WA_WES_S_MERCHANDISE_STR-MMBOM sy-vline 
WA_WES_S_MERCHANDISE_STR-PROC_PRICES_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-SALES_PRICES_TAB sy-vline 
WA_WES_S_MERCHANDISE_STR-CHGID sy-vline      INTO ld_text SEPARATED BY SPACE.

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