ABAP Select data from SAP table SCH_S_SELECTED_FIELDS 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_FIELDS 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_FIELDS. 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_FIELDS 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_FIELDS TYPE STANDARD TABLE OF SCH_S_SELECTED_FIELDS,
      WA_SCH_S_SELECTED_FIELDS TYPE SCH_S_SELECTED_FIELDS,
      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_FIELDS> TYPE SCH_S_SELECTED_FIELDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCH_S_SELECTED_FIELDS
*  INTO TABLE @DATA(IT_SCH_S_SELECTED_FIELDS2).
*--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_FIELDS INDEX 1 INTO DATA(WA_SCH_S_SELECTED_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCH_S_SELECTED_FIELDS>-FIELDNAME = 1.
<SCH_S_SELECTED_FIELDS>-ISKEY = 1.
<SCH_S_SELECTED_FIELDS>-FIELDLENGTH = 1.
<SCH_S_SELECTED_FIELDS>-FIELDALIAS = 1.
<SCH_S_SELECTED_FIELDS>-PATH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCH_S_SELECTED_FIELDS-LANGUAGEFILTER, sy-vline,
  WA_SCH_S_SELECTED_FIELDS-NAME, sy-vline,
  WA_SCH_S_SELECTED_FIELDS-VALUE, sy-vline,
  WA_SCH_S_SELECTED_FIELDS-FIELDDATATYPE, sy-vline,
  WA_SCH_S_SELECTED_FIELDS-FIELDDESCRIPTION, sy-vline,
  WA_SCH_S_SELECTED_FIELDS-FIELDSEMANTICS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCH_S_SELECTED_FIELDS 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_FIELDS 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_FIELDS INTO WA_SCH_S_SELECTED_FIELDS.


*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_FIELDS_STR, 
FIELDNAME TYPE STRING,
ISKEY TYPE STRING,
FIELDLENGTH TYPE STRING,
FIELDALIAS TYPE STRING,
PATH TYPE STRING,
LANGUAGEFILTER TYPE STRING,
NAME TYPE STRING,
VALUE TYPE STRING,
FIELDDATATYPE TYPE STRING,
FIELDDESCRIPTION TYPE STRING,
FIELDSEMANTICS TYPE STRING,
REQUEST TYPE STRING,
ISREQUESTEXTALLOWED TYPE STRING,
FULLTEXTINDEX TYPE STRING,
RESPONSE TYPE STRING,
RESPONSEPOSITION TYPE STRING,
RESPONSETYPE TYPE STRING,
TYPEAHEAD TYPE STRING,
FILTER TYPE STRING,
ISADVANCEDFILTER TYPE STRING,
ISFACET TYPE STRING,
FACETPOSITION TYPE STRING,
ISUIHIDDEN TYPE STRING,
RANKING TYPE STRING,
WEIGHT TYPE STRING,
FACTOR TYPE STRING,
ATTRIBUTE TYPE STRING,
FACTORWEIGHT TYPE STRING,
NAVIGATIONPARAMNAME TYPE STRING,
GLOBALFILTER TYPE STRING,
LOGICALOPERATOR TYPE STRING,
CONDITIONALOPERATOR TYPE STRING,
FILTERVALUE TYPE STRING,
GROUPING TYPE STRING,
ISPRIMARYGROUPFIELD TYPE STRING,
GROUPLABEL TYPE STRING,
GROUPINDENTIFIER TYPE STRING,
GROUPTEMPLATEFIELDS TYPE STRING,
GROUPEDWITH TYPE STRING,
GROUPTYPE TYPE STRING,
GROUPPOSITION TYPE STRING,
RELEVANTVIEW TYPE STRING,
SORT TYPE STRING,
SOURCE TYPE STRING,
SEARCHMODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCH_S_SELECTED_FIELDS_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_FIELDS_STR-FIELDNAME sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-ISKEY sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FIELDLENGTH sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FIELDALIAS sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-PATH sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-LANGUAGEFILTER sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-NAME sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-VALUE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FIELDDATATYPE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FIELDDESCRIPTION sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FIELDSEMANTICS sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-REQUEST sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-ISREQUESTEXTALLOWED sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FULLTEXTINDEX sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-RESPONSE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-RESPONSEPOSITION sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-RESPONSETYPE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-TYPEAHEAD sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FILTER sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-ISADVANCEDFILTER sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-ISFACET sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FACETPOSITION sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-ISUIHIDDEN sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-RANKING sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-WEIGHT sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FACTOR sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-ATTRIBUTE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FACTORWEIGHT sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-NAVIGATIONPARAMNAME sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GLOBALFILTER sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-LOGICALOPERATOR sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-CONDITIONALOPERATOR sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-FILTERVALUE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GROUPING sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-ISPRIMARYGROUPFIELD sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GROUPLABEL sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GROUPINDENTIFIER sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GROUPTEMPLATEFIELDS sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GROUPEDWITH sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GROUPTYPE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-GROUPPOSITION sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-RELEVANTVIEW sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-SORT sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-SOURCE sy-vline 
WA_SCH_S_SELECTED_FIELDS_STR-SEARCHMODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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