ABAP Select data from SAP table SCN2STRUCTO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SCN2STRUCTO 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 SCN2STRUCTO. 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 SCN2STRUCTO 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_SCN2STRUCTO TYPE STANDARD TABLE OF SCN2STRUCTO,
      WA_SCN2STRUCTO TYPE SCN2STRUCTO,
      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: <SCN2STRUCTO> TYPE SCN2STRUCTO.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SCN2STRUCTO.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SCN2STRUCTO
  INTO TABLE IT_SCN2STRUCTO.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCN2STRUCTO
*  INTO TABLE @DATA(IT_SCN2STRUCTO2).
*--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_SCN2STRUCTO INDEX 1 INTO DATA(WA_SCN2STRUCTO2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SCN2STRUCTO ASSIGNING <SCN2STRUCTO>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCN2STRUCTO>-STRUCTO_1 = 1.
<SCN2STRUCTO>-DCHAR10 = 1.
<SCN2STRUCTO>-DCHAR1 = 1.
<SCN2STRUCTO>-DCLNT = 1.
<SCN2STRUCTO>-DDATS = 1.

ENDLOOP.

LOOP AT IT_SCN2STRUCTO INTO WA_SCN2STRUCTO.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCN2STRUCTO-DDEC, sy-vline,
  WA_SCN2STRUCTO-DFLTP, sy-vline,
  WA_SCN2STRUCTO-DINT4, sy-vline,
  WA_SCN2STRUCTO-DINT2, sy-vline,
  WA_SCN2STRUCTO-DINT1, sy-vline,
  WA_SCN2STRUCTO-DNUMC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCN2STRUCTO 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_SCN2STRUCTO 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_SCN2STRUCTO INTO WA_SCN2STRUCTO.


*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_SCN2STRUCTO_STR, 
STRUCTO_1 TYPE STRING,
DCHAR10 TYPE STRING,
DCHAR1 TYPE STRING,
DCLNT TYPE STRING,
DDATS TYPE STRING,
DDEC TYPE STRING,
DFLTP TYPE STRING,
DINT4 TYPE STRING,
DINT2 TYPE STRING,
DINT1 TYPE STRING,
DNUMC TYPE STRING,
DDRAW50 TYPE STRING,
STRUCTO_2 TYPE STRING,
DCHAR10 TYPE STRING,
DCHAR1 TYPE STRING,
DCLNT TYPE STRING,
DDATS TYPE STRING,
DDEC TYPE STRING,
DFLTP TYPE STRING,
DINT4 TYPE STRING,
DINT2 TYPE STRING,
DINT1 TYPE STRING,
DNUMC TYPE STRING,
DDRAW50 TYPE STRING,
ALICHAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCN2STRUCTO_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_SCN2STRUCTO_STR-STRUCTO_1 sy-vline 
WA_SCN2STRUCTO_STR-DCHAR10 sy-vline 
WA_SCN2STRUCTO_STR-DCHAR1 sy-vline 
WA_SCN2STRUCTO_STR-DCLNT sy-vline 
WA_SCN2STRUCTO_STR-DDATS sy-vline 
WA_SCN2STRUCTO_STR-DDEC sy-vline 
WA_SCN2STRUCTO_STR-DFLTP sy-vline 
WA_SCN2STRUCTO_STR-DINT4 sy-vline 
WA_SCN2STRUCTO_STR-DINT2 sy-vline 
WA_SCN2STRUCTO_STR-DINT1 sy-vline 
WA_SCN2STRUCTO_STR-DNUMC sy-vline 
WA_SCN2STRUCTO_STR-DDRAW50 sy-vline 
WA_SCN2STRUCTO_STR-STRUCTO_2 sy-vline 
WA_SCN2STRUCTO_STR-DCHAR10 sy-vline 
WA_SCN2STRUCTO_STR-DCHAR1 sy-vline 
WA_SCN2STRUCTO_STR-DCLNT sy-vline 
WA_SCN2STRUCTO_STR-DDATS sy-vline 
WA_SCN2STRUCTO_STR-DDEC sy-vline 
WA_SCN2STRUCTO_STR-DFLTP sy-vline 
WA_SCN2STRUCTO_STR-DINT4 sy-vline 
WA_SCN2STRUCTO_STR-DINT2 sy-vline 
WA_SCN2STRUCTO_STR-DINT1 sy-vline 
WA_SCN2STRUCTO_STR-DNUMC sy-vline 
WA_SCN2STRUCTO_STR-DDRAW50 sy-vline 
WA_SCN2STRUCTO_STR-ALICHAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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