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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_RF_SN
*  INTO TABLE @DATA(IT_/SCWM/S_RF_SN2).
*--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_RF_SN INDEX 1 INTO DATA(WA_/SCWM/S_RF_SN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_RF_SN>-LGNUM = 1.
</SCWM/S_RF_SN>-WHO = 1.
</SCWM/S_RF_SN>-TANUM = 1.
</SCWM/S_RF_SN>-MATNR = 1.
</SCWM/S_RF_SN>-MATID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_RF_SN-HUIDENT, sy-vline,
  WA_/SCWM/S_RF_SN-NISTA, sy-vline,
  WA_/SCWM/S_RF_SN-ALTME, sy-vline,
  WA_/SCWM/S_RF_SN-NOSN, sy-vline,
  WA_/SCWM/S_RF_SN-COLSN, sy-vline,
  WA_/SCWM/S_RF_SN-DOCCAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_RF_SN 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_RF_SN 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_RF_SN INTO WA_/SCWM/S_RF_SN.


*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 WHO
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_RF_SN-WHO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_RF_SN-WHO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MDLP1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MDLP1_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_RF_SN-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_RF_SN-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ENTITLED
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_RF_SN-ENTITLED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_RF_SN-ENTITLED.
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_RF_SN_STR, 
LGNUM TYPE STRING,
WHO TYPE STRING,
TANUM TYPE STRING,
MATNR TYPE STRING,
MATID TYPE STRING,
HUIDENT TYPE STRING,
NISTA TYPE STRING,
ALTME TYPE STRING,
NOSN TYPE STRING,
COLSN TYPE STRING,
DOCCAT TYPE STRING,
DOCID TYPE STRING,
ITMID TYPE STRING,
SERID TYPE STRING,
SN_TYPE TYPE STRING,
VLENR TYPE STRING,
VLPLA TYPE STRING,
SGUID_HU TYPE STRING,
GUID_STOCK0 TYPE STRING,
QDOCCAT TYPE STRING,
QDOCID TYPE STRING,
QITMID TYPE STRING,
INSPID TYPE STRING,
IDPLATE TYPE STRING,
DIFTY TYPE STRING,
LAST_STEP TYPE STRING,
DIFF_SCREEN TYPE STRING,
RETURN_FCODE TYPE STRING,
SN_CALL TYPE STRING,
FLG_AUTOSN_OFF TYPE STRING,
INV_NO_CHECKS TYPE STRING,
INV_MAT_LINE TYPE STRING,
SELNO TYPE STRING,
SELSN TYPE STRING,
LSCK_SCREEN TYPE STRING,
COMB_TANUMS TYPE STRING,
UII TYPE STRING,
FLG_READ_ONLY TYPE STRING,
ENTITLED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_RF_SN_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_RF_SN_STR-LGNUM sy-vline 
WA_/SCWM/S_RF_SN_STR-WHO sy-vline 
WA_/SCWM/S_RF_SN_STR-TANUM sy-vline 
WA_/SCWM/S_RF_SN_STR-MATNR sy-vline 
WA_/SCWM/S_RF_SN_STR-MATID sy-vline 
WA_/SCWM/S_RF_SN_STR-HUIDENT sy-vline 
WA_/SCWM/S_RF_SN_STR-NISTA sy-vline 
WA_/SCWM/S_RF_SN_STR-ALTME sy-vline 
WA_/SCWM/S_RF_SN_STR-NOSN sy-vline 
WA_/SCWM/S_RF_SN_STR-COLSN sy-vline 
WA_/SCWM/S_RF_SN_STR-DOCCAT sy-vline 
WA_/SCWM/S_RF_SN_STR-DOCID sy-vline 
WA_/SCWM/S_RF_SN_STR-ITMID sy-vline 
WA_/SCWM/S_RF_SN_STR-SERID sy-vline 
WA_/SCWM/S_RF_SN_STR-SN_TYPE sy-vline 
WA_/SCWM/S_RF_SN_STR-VLENR sy-vline 
WA_/SCWM/S_RF_SN_STR-VLPLA sy-vline 
WA_/SCWM/S_RF_SN_STR-SGUID_HU sy-vline 
WA_/SCWM/S_RF_SN_STR-GUID_STOCK0 sy-vline 
WA_/SCWM/S_RF_SN_STR-QDOCCAT sy-vline 
WA_/SCWM/S_RF_SN_STR-QDOCID sy-vline 
WA_/SCWM/S_RF_SN_STR-QITMID sy-vline 
WA_/SCWM/S_RF_SN_STR-INSPID sy-vline 
WA_/SCWM/S_RF_SN_STR-IDPLATE sy-vline 
WA_/SCWM/S_RF_SN_STR-DIFTY sy-vline 
WA_/SCWM/S_RF_SN_STR-LAST_STEP sy-vline 
WA_/SCWM/S_RF_SN_STR-DIFF_SCREEN sy-vline 
WA_/SCWM/S_RF_SN_STR-RETURN_FCODE sy-vline 
WA_/SCWM/S_RF_SN_STR-SN_CALL sy-vline 
WA_/SCWM/S_RF_SN_STR-FLG_AUTOSN_OFF sy-vline 
WA_/SCWM/S_RF_SN_STR-INV_NO_CHECKS sy-vline 
WA_/SCWM/S_RF_SN_STR-INV_MAT_LINE sy-vline 
WA_/SCWM/S_RF_SN_STR-SELNO sy-vline 
WA_/SCWM/S_RF_SN_STR-SELSN sy-vline 
WA_/SCWM/S_RF_SN_STR-LSCK_SCREEN sy-vline 
WA_/SCWM/S_RF_SN_STR-COMB_TANUMS sy-vline 
WA_/SCWM/S_RF_SN_STR-UII sy-vline 
WA_/SCWM/S_RF_SN_STR-FLG_READ_ONLY sy-vline 
WA_/SCWM/S_RF_SN_STR-ENTITLED sy-vline      INTO ld_text SEPARATED BY SPACE.

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