ABAP Select data from SAP table SCH_S_SELECTED_FIELD_MDE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCH_S_SELECTED_FIELD_MDE
*  INTO TABLE @DATA(IT_SCH_S_SELECTED_FIELD_MDE2).
*--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_SCH_S_SELECTED_FIELD_MDE INDEX 1 INTO DATA(WA_SCH_S_SELECTED_FIELD_MDE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCH_S_SELECTED_FIELD_MDE>-FIELDNAME = 1.
<SCH_S_SELECTED_FIELD_MDE>-FIELDALIAS = 1.
<SCH_S_SELECTED_FIELD_MDE>-RESPONSE = 1.
<SCH_S_SELECTED_FIELD_MDE>-RESPONSEPOSITION = 1.
<SCH_S_SELECTED_FIELD_MDE>-VALUE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCH_S_SELECTED_FIELD_MDE-MDENAME, sy-vline,
  WA_SCH_S_SELECTED_FIELD_MDE-RESPONSETYPE, sy-vline,
  WA_SCH_S_SELECTED_FIELD_MDE-VALUE, sy-vline,
  WA_SCH_S_SELECTED_FIELD_MDE-MDENAME, sy-vline,
  WA_SCH_S_SELECTED_FIELD_MDE-VALUEQUALIFIER, sy-vline,
  WA_SCH_S_SELECTED_FIELD_MDE-VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCH_S_SELECTED_FIELD_MDE 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_SCH_S_SELECTED_FIELD_MDE 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_SCH_S_SELECTED_FIELD_MDE INTO WA_SCH_S_SELECTED_FIELD_MDE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_SCH_S_SELECTED_FIELD_MDE_STR, 
FIELDNAME TYPE STRING,
FIELDALIAS TYPE STRING,
RESPONSE TYPE STRING,
RESPONSEPOSITION TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
RESPONSETYPE TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
VALUEQUALIFIER TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
FILTER TYPE STRING,
FACETPOSITION TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
ISADVANCEDFILTER TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
ISFACET TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
FIELDDESCRIPTION TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
REQUEST TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
RANKING TYPE STRING,
WEIGHT TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
TYPEAHEAD TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
FULLTEXTINDEX TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
FIELDENABLED TYPE STRING,
VALUE TYPE STRING,
MDENAME TYPE STRING,
SOURCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCH_S_SELECTED_FIELD_MDE_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_SCH_S_SELECTED_FIELD_MDE_STR-FIELDNAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-FIELDALIAS sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-RESPONSE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-RESPONSEPOSITION sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-RESPONSETYPE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUEQUALIFIER sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-FILTER sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-FACETPOSITION sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-ISADVANCEDFILTER sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-ISFACET sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-FIELDDESCRIPTION sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-REQUEST sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-RANKING sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-WEIGHT sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-TYPEAHEAD sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-FULLTEXTINDEX sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-FIELDENABLED sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-MDENAME sy-vline 
WA_SCH_S_SELECTED_FIELD_MDE_STR-SOURCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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