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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_MFG_ATTR_ITEM
*  INTO TABLE @DATA(IT_/SCWM/S_MFG_ATTR_ITEM2).
*--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_MFG_ATTR_ITEM INDEX 1 INTO DATA(WA_/SCWM/S_MFG_ATTR_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_MFG_ATTR_ITEM>-DOCCAT = 1.
</SCWM/S_MFG_ATTR_ITEM>-DOCID = 1.
</SCWM/S_MFG_ATTR_ITEM>-ITEMID = 1.
</SCWM/S_MFG_ATTR_ITEM>-DOCNO = 1.
</SCWM/S_MFG_ATTR_ITEM>-ITEMNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_MFG_ATTR_ITEM-WORK_CENTER, sy-vline,
  WA_/SCWM/S_MFG_ATTR_ITEM-OPERATION, sy-vline,
  WA_/SCWM/S_MFG_ATTR_ITEM-REFDOCNO_RES, sy-vline,
  WA_/SCWM/S_MFG_ATTR_ITEM-REFITEMNO_RES, sy-vline,
  WA_/SCWM/S_MFG_ATTR_ITEM-PSA, sy-vline,
  WA_/SCWM/S_MFG_ATTR_ITEM-GMBIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_MFG_ATTR_ITEM 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_MFG_ATTR_ITEM 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_MFG_ATTR_ITEM INTO WA_/SCWM/S_MFG_ATTR_ITEM.


*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 DOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MFG_ATTR_ITEM-DOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ATTR_ITEM-DOCNO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPH0, internal->external for field REFITEMNO_RES
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MFG_ATTR_ITEM-REFITEMNO_RES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ATTR_ITEM-REFITEMNO_RES.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MFG_ATTR_ITEM-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ATTR_ITEM-UOM.
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_MFG_ATTR_ITEM_STR, 
DOCCAT TYPE STRING,
DOCID TYPE STRING,
ITEMID TYPE STRING,
DOCNO TYPE STRING,
ITEMNO TYPE STRING,
WORK_CENTER TYPE STRING,
OPERATION TYPE STRING,
REFDOCNO_RES TYPE STRING,
REFITEMNO_RES TYPE STRING,
PSA TYPE STRING,
GMBIN TYPE STRING,
PRODUCTNO TYPE STRING,
PRODUCTID TYPE STRING,
BATCHNO TYPE STRING,
BATCHID TYPE STRING,
BACKFLUSH TYPE STRING,
STAGING_METHOD TYPE STRING,
ITEM_QTY TYPE STRING,
QTY TYPE STRING,
UOM TYPE STRING,
HU_ITEM TYPE STRING,
ORDIM_C TYPE STRING,
INDEX_TO_SELECTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_MFG_ATTR_ITEM_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_MFG_ATTR_ITEM_STR-DOCCAT sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-DOCID sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-ITEMID sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-DOCNO sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-ITEMNO sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-WORK_CENTER sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-OPERATION sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-REFDOCNO_RES sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-REFITEMNO_RES sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-PSA sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-GMBIN sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-PRODUCTNO sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-PRODUCTID sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-BATCHNO sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-BATCHID sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-BACKFLUSH sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-STAGING_METHOD sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-ITEM_QTY sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-QTY sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-UOM sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-HU_ITEM sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-ORDIM_C sy-vline 
WA_/SCWM/S_MFG_ATTR_ITEM_STR-INDEX_TO_SELECTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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