ABAP Select data from SAP table /SCWM/S_ERP_STOCK 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_ERP_STOCK 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_ERP_STOCK. 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_ERP_STOCK 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_ERP_STOCK TYPE STANDARD TABLE OF /SCWM/S_ERP_STOCK,
      WA_/SCWM/S_ERP_STOCK TYPE /SCWM/S_ERP_STOCK,
      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_ERP_STOCK> TYPE /SCWM/S_ERP_STOCK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_ERP_STOCK
*  INTO TABLE @DATA(IT_/SCWM/S_ERP_STOCK2).
*--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_ERP_STOCK INDEX 1 INTO DATA(WA_/SCWM/S_ERP_STOCK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_ERP_STOCK>-MATERIAL = 1.
</SCWM/S_ERP_STOCK>-BATCH = 1.
</SCWM/S_ERP_STOCK>-STOCK_CAT = 1.
</SCWM/S_ERP_STOCK>-SPEC_STOCK = 1.
</SCWM/S_ERP_STOCK>-SP_STCK_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_ERP_STOCK-SALES_ORD, sy-vline,
  WA_/SCWM/S_ERP_STOCK-S_ORD_ITEM, sy-vline,
  WA_/SCWM/S_ERP_STOCK-WBS_ELEM, sy-vline,
  WA_/SCWM/S_ERP_STOCK-WBS_ELEM_INT, sy-vline,
  WA_/SCWM/S_ERP_STOCK-VENDOR, sy-vline,
  WA_/SCWM/S_ERP_STOCK-CUSTOMER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_ERP_STOCK 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_ERP_STOCK 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_ERP_STOCK INTO WA_/SCWM/S_ERP_STOCK.


*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 MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ERP_STOCK-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ERP_STOCK-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSN, internal->external for field WBS_ELEM
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ERP_STOCK-WBS_ELEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ERP_STOCK-WBS_ELEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field WBS_ELEM_INT
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ERP_STOCK-WBS_ELEM_INT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ERP_STOCK-WBS_ELEM_INT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field MAT_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ERP_STOCK-MAT_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ERP_STOCK-MAT_PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ERP_STOCK-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ERP_STOCK-PS_PSP_PNR.
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_ERP_STOCK_STR, 
MATERIAL TYPE STRING,
BATCH TYPE STRING,
STOCK_CAT TYPE STRING,
SPEC_STOCK TYPE STRING,
SP_STCK_NO TYPE STRING,
SALES_ORD TYPE STRING,
S_ORD_ITEM TYPE STRING,
WBS_ELEM TYPE STRING,
WBS_ELEM_INT TYPE STRING,
VENDOR TYPE STRING,
CUSTOMER TYPE STRING,
MAT_PSPNR TYPE STRING,
PS_PSP_PNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_ERP_STOCK_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_ERP_STOCK_STR-MATERIAL sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-BATCH sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-STOCK_CAT sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-SPEC_STOCK sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-SP_STCK_NO sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-SALES_ORD sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-S_ORD_ITEM sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-WBS_ELEM sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-WBS_ELEM_INT sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-VENDOR sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-CUSTOMER sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-MAT_PSPNR sy-vline 
WA_/SCWM/S_ERP_STOCK_STR-PS_PSP_PNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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