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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_GR_SCAN
*  INTO TABLE @DATA(IT_/SCWM/S_GR_SCAN2).
*--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_GR_SCAN INDEX 1 INTO DATA(WA_/SCWM/S_GR_SCAN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_GR_SCAN>-QTY_O = 1.
</SCWM/S_GR_SCAN>-UOM_O = 1.
</SCWM/S_GR_SCAN>-MATNR_O = 1.
</SCWM/S_GR_SCAN>-MAKTX_O = 1.
</SCWM/S_GR_SCAN>-CHARG_O = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_GR_SCAN-SLED_O, sy-vline,
  WA_/SCWM/S_GR_SCAN-EAN11, sy-vline,
  WA_/SCWM/S_GR_SCAN-QTY, sy-vline,
  WA_/SCWM/S_GR_SCAN-UOM, sy-vline,
  WA_/SCWM/S_GR_SCAN-MATID, sy-vline,
  WA_/SCWM/S_GR_SCAN-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_GR_SCAN 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_GR_SCAN 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_GR_SCAN INTO WA_/SCWM/S_GR_SCAN.


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

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

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_GR_SCAN-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_GR_SCAN-EAN11.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MDLPD, internal->external for field MATID
CALL FUNCTION 'CONVERSION_EXIT_MDLPD_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_GR_SCAN-MATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_GR_SCAN-MATID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field PQ_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_GR_SCAN-PQ_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_GR_SCAN-PQ_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_GR_SCAN_STR, 
QTY_O TYPE STRING,
UOM_O TYPE STRING,
MATNR_O TYPE STRING,
MAKTX_O TYPE STRING,
CHARG_O TYPE STRING,
SLED_O TYPE STRING,
EAN11 TYPE STRING,
QTY TYPE STRING,
UOM TYPE STRING,
MATID TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
CHARG TYPE STRING,
SLED TYPE STRING,
PQ_UOM TYPE STRING,
XQTY TYPE STRING,
XMATNR TYPE STRING,
XCHARG TYPE STRING,
XSLED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_GR_SCAN_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_GR_SCAN_STR-QTY_O sy-vline 
WA_/SCWM/S_GR_SCAN_STR-UOM_O sy-vline 
WA_/SCWM/S_GR_SCAN_STR-MATNR_O sy-vline 
WA_/SCWM/S_GR_SCAN_STR-MAKTX_O sy-vline 
WA_/SCWM/S_GR_SCAN_STR-CHARG_O sy-vline 
WA_/SCWM/S_GR_SCAN_STR-SLED_O sy-vline 
WA_/SCWM/S_GR_SCAN_STR-EAN11 sy-vline 
WA_/SCWM/S_GR_SCAN_STR-QTY sy-vline 
WA_/SCWM/S_GR_SCAN_STR-UOM sy-vline 
WA_/SCWM/S_GR_SCAN_STR-MATID sy-vline 
WA_/SCWM/S_GR_SCAN_STR-MATNR sy-vline 
WA_/SCWM/S_GR_SCAN_STR-MAKTX sy-vline 
WA_/SCWM/S_GR_SCAN_STR-CHARG sy-vline 
WA_/SCWM/S_GR_SCAN_STR-SLED sy-vline 
WA_/SCWM/S_GR_SCAN_STR-PQ_UOM sy-vline 
WA_/SCWM/S_GR_SCAN_STR-XQTY sy-vline 
WA_/SCWM/S_GR_SCAN_STR-XMATNR sy-vline 
WA_/SCWM/S_GR_SCAN_STR-XCHARG sy-vline 
WA_/SCWM/S_GR_SCAN_STR-XSLED sy-vline      INTO ld_text SEPARATED BY SPACE.

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