ABAP Select data from SAP table COMES_S_DRF_ROUTER_FILT_ENH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP COMES_S_DRF_ROUTER_FILT_ENH 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 COMES_S_DRF_ROUTER_FILT_ENH. 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 COMES_S_DRF_ROUTER_FILT_ENH 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_COMES_S_DRF_ROUTER_FILT_ENH TYPE STANDARD TABLE OF COMES_S_DRF_ROUTER_FILT_ENH,
      WA_COMES_S_DRF_ROUTER_FILT_ENH TYPE COMES_S_DRF_ROUTER_FILT_ENH,
      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: <COMES_S_DRF_ROUTER_FILT_ENH> TYPE COMES_S_DRF_ROUTER_FILT_ENH.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM COMES_S_DRF_ROUTER_FILT_ENH
  INTO TABLE IT_COMES_S_DRF_ROUTER_FILT_ENH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMES_S_DRF_ROUTER_FILT_ENH
*  INTO TABLE @DATA(IT_COMES_S_DRF_ROUTER_FILT_ENH2).
*--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_COMES_S_DRF_ROUTER_FILT_ENH INDEX 1 INTO DATA(WA_COMES_S_DRF_ROUTER_FILT_ENH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_COMES_S_DRF_ROUTER_FILT_ENH ASSIGNING <COMES_S_DRF_ROUTER_FILT_ENH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMES_S_DRF_ROUTER_FILT_ENH>-MATNR = 1.
<COMES_S_DRF_ROUTER_FILT_ENH>-WERKS = 1.
<COMES_S_DRF_ROUTER_FILT_ENH>-PLNTY = 1.
<COMES_S_DRF_ROUTER_FILT_ENH>-PLNNR = 1.
<COMES_S_DRF_ROUTER_FILT_ENH>-PLNAL = 1.

ENDLOOP.

LOOP AT IT_COMES_S_DRF_ROUTER_FILT_ENH INTO WA_COMES_S_DRF_ROUTER_FILT_ENH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMES_S_DRF_ROUTER_FILT_ENH-VERWE, sy-vline,
  WA_COMES_S_DRF_ROUTER_FILT_ENH-MTART, sy-vline,
  WA_COMES_S_DRF_ROUTER_FILT_ENH-MATKL, sy-vline,
  WA_COMES_S_DRF_ROUTER_FILT_ENH-DISMM, sy-vline,
  WA_COMES_S_DRF_ROUTER_FILT_ENH-DISPO, sy-vline,
  WA_COMES_S_DRF_ROUTER_FILT_ENH-STATU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COMES_S_DRF_ROUTER_FILT_ENH 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_COMES_S_DRF_ROUTER_FILT_ENH 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_COMES_S_DRF_ROUTER_FILT_ENH INTO WA_COMES_S_DRF_ROUTER_FILT_ENH.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_COMES_S_DRF_ROUTER_FILT_ENH-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMES_S_DRF_ROUTER_FILT_ENH-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMES_S_DRF_ROUTER_FILT_ENH-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMES_S_DRF_ROUTER_FILT_ENH-PLNAL.
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_COMES_S_DRF_ROUTER_FILT_ENH_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
VERWE TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
DISMM TYPE STRING,
DISPO TYPE STRING,
STATU TYPE STRING,
FEVOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COMES_S_DRF_ROUTER_FILT_ENH_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_COMES_S_DRF_ROUTER_FILT_ENH_STR-MATNR sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-WERKS sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-PLNTY sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-PLNNR sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-PLNAL sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-VERWE sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-MTART sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-MATKL sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-DISMM sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-DISPO sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-STATU sy-vline 
WA_COMES_S_DRF_ROUTER_FILT_ENH_STR-FEVOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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