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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_MFG_ITEM_REVERS_EXT
*  INTO TABLE @DATA(IT_/SCWM/S_MFG_ITEM_REVERS_EXT2).
*--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_ITEM_REVERS_EXT INDEX 1 INTO DATA(WA_/SCWM/S_MFG_ITEM_REVERS_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_MFG_ITEM_REVERS_EXT>-WORK_CENTER = 1.
</SCWM/S_MFG_ITEM_REVERS_EXT>-OPERATION = 1.
</SCWM/S_MFG_ITEM_REVERS_EXT>-RES_ITEM = 1.
</SCWM/S_MFG_ITEM_REVERS_EXT>-QTY = 1.
</SCWM/S_MFG_ITEM_REVERS_EXT>-UOM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_MFG_ITEM_REVERS_EXT-PSA, sy-vline,
  WA_/SCWM/S_MFG_ITEM_REVERS_EXT-BATCHNO, sy-vline,
  WA_/SCWM/S_MFG_ITEM_REVERS_EXT-PRODUCTNO, sy-vline,
  WA_/SCWM/S_MFG_ITEM_REVERS_EXT-HUIDENT, sy-vline,
  WA_/SCWM/S_MFG_ITEM_REVERS_EXT-IDPLATE, sy-vline,
  WA_/SCWM/S_MFG_ITEM_REVERS_EXT-T_SERID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_MFG_ITEM_REVERS_EXT 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_ITEM_REVERS_EXT 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_ITEM_REVERS_EXT INTO WA_/SCWM/S_MFG_ITEM_REVERS_EXT.


*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 ALPH0, internal->external for field RES_ITEM
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MFG_ITEM_REVERS_EXT-RES_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ITEM_REVERS_EXT-RES_ITEM.
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_ITEM_REVERS_EXT-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ITEM_REVERS_EXT-UOM.
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_ITEM_REVERS_EXT-PSA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ITEM_REVERS_EXT-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_ITEM_REVERS_EXT-PRODUCTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ITEM_REVERS_EXT-PRODUCTNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit HUID, internal->external for field HUIDENT
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MFG_ITEM_REVERS_EXT-HUIDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ITEM_REVERS_EXT-HUIDENT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit BPMAP, internal->external for field STOCK_OWNER
CALL FUNCTION 'CONVERSION_EXIT_BPMAP_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MFG_ITEM_REVERS_EXT-STOCK_OWNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ITEM_REVERS_EXT-STOCK_OWNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RES_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MFG_ITEM_REVERS_EXT-RES_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MFG_ITEM_REVERS_EXT-RES_NUMBER.
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_ITEM_REVERS_EXT_STR, 
WORK_CENTER TYPE STRING,
OPERATION TYPE STRING,
RES_ITEM TYPE STRING,
QTY TYPE STRING,
UOM TYPE STRING,
PSA TYPE STRING,
BATCHNO TYPE STRING,
PRODUCTNO TYPE STRING,
HUIDENT TYPE STRING,
IDPLATE TYPE STRING,
T_SERID TYPE STRING,
CW_DATA TYPE STRING,
CWQUAN TYPE STRING,
CWUNIT TYPE STRING,
STOCK_OWNER TYPE STRING,
GMBIN TYPE STRING,
RES_NUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_MFG_ITEM_REVERS_EXT_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_ITEM_REVERS_EXT_STR-WORK_CENTER sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-OPERATION sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-RES_ITEM sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-QTY sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-UOM sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-PSA sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-BATCHNO sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-PRODUCTNO sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-HUIDENT sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-IDPLATE sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-T_SERID sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-CW_DATA sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-CWQUAN sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-CWUNIT sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-STOCK_OWNER sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-GMBIN sy-vline 
WA_/SCWM/S_MFG_ITEM_REVERS_EXT_STR-RES_NUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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