ABAP Select data from SAP table MDG_BS_DRAD_S_NOTE_DB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDG_BS_DRAD_S_NOTE_DB
*  INTO TABLE @DATA(IT_MDG_BS_DRAD_S_NOTE_DB2).
*--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_MDG_BS_DRAD_S_NOTE_DB INDEX 1 INTO DATA(WA_MDG_BS_DRAD_S_NOTE_DB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDG_BS_DRAD_S_NOTE_DB>-MANDT = 1.
<MDG_BS_DRAD_S_NOTE_DB>-DOKAR = 1.
<MDG_BS_DRAD_S_NOTE_DB>-DOKNR = 1.
<MDG_BS_DRAD_S_NOTE_DB>-DOKVR = 1.
<MDG_BS_DRAD_S_NOTE_DB>-DOKTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDG_BS_DRAD_S_NOTE_DB-DOKOB, sy-vline,
  WA_MDG_BS_DRAD_S_NOTE_DB-OBZAE, sy-vline,
  WA_MDG_BS_DRAD_S_NOTE_DB-OBJKY, sy-vline,
  WA_MDG_BS_DRAD_S_NOTE_DB-LANGU, sy-vline,
  WA_MDG_BS_DRAD_S_NOTE_DB-NOTE, sy-vline,
  WA_MDG_BS_DRAD_S_NOTE_DB-LINES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDG_BS_DRAD_S_NOTE_DB 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_MDG_BS_DRAD_S_NOTE_DB 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_MDG_BS_DRAD_S_NOTE_DB INTO WA_MDG_BS_DRAD_S_NOTE_DB.


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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MDG_BS_DRAD_S_NOTE_DB-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_BS_DRAD_S_NOTE_DB-LANGU.
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_MDG_BS_DRAD_S_NOTE_DB_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DOKOB TYPE STRING,
OBZAE TYPE STRING,
OBJKY TYPE STRING,
LANGU TYPE STRING,
NOTE TYPE STRING,
LINES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDG_BS_DRAD_S_NOTE_DB_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_MDG_BS_DRAD_S_NOTE_DB_STR-MANDT sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-DOKAR sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-DOKNR sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-DOKVR sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-DOKTL sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-DOKOB sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-OBZAE sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-OBJKY sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-LANGU sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-NOTE sy-vline 
WA_MDG_BS_DRAD_S_NOTE_DB_STR-LINES sy-vline      INTO ld_text SEPARATED BY SPACE.

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