ABAP Select data from SAP table MDG_GW_S_ORIGINALS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDG_GW_S_ORIGINALS 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_GW_S_ORIGINALS. 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_GW_S_ORIGINALS 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_GW_S_ORIGINALS TYPE STANDARD TABLE OF MDG_GW_S_ORIGINALS,
      WA_MDG_GW_S_ORIGINALS TYPE MDG_GW_S_ORIGINALS,
      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_GW_S_ORIGINALS> TYPE MDG_GW_S_ORIGINALS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDG_GW_S_ORIGINALS
*  INTO TABLE @DATA(IT_MDG_GW_S_ORIGINALS2).
*--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_GW_S_ORIGINALS INDEX 1 INTO DATA(WA_MDG_GW_S_ORIGINALS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDG_GW_S_ORIGINALS>-DOCUMENTTYPE = 1.
<MDG_GW_S_ORIGINALS>-DOCUMENTNUMBER = 1.
<MDG_GW_S_ORIGINALS>-DOCUMENTPART = 1.
<MDG_GW_S_ORIGINALS>-DOCUMENTVERSION = 1.
<MDG_GW_S_ORIGINALS>-ORIGINALTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDG_GW_S_ORIGINALS-STORAGECATEGORY, sy-vline,
  WA_MDG_GW_S_ORIGINALS-WSAPPLICATION, sy-vline,
  WA_MDG_GW_S_ORIGINALS-DOCPATH, sy-vline,
  WA_MDG_GW_S_ORIGINALS-DOCFILE, sy-vline,
  WA_MDG_GW_S_ORIGINALS-STATUSINTERN, sy-vline,
  WA_MDG_GW_S_ORIGINALS-STATUSEXTERN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDG_GW_S_ORIGINALS 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_GW_S_ORIGINALS 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_GW_S_ORIGINALS INTO WA_MDG_GW_S_ORIGINALS.


*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 DOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDG_GW_S_ORIGINALS-DOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_GW_S_ORIGINALS-DOCUMENTNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MDG_GW_S_ORIGINALS-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_GW_S_ORIGINALS-LANGUAGE.
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_GW_S_ORIGINALS_STR, 
DOCUMENTTYPE TYPE STRING,
DOCUMENTNUMBER TYPE STRING,
DOCUMENTPART TYPE STRING,
DOCUMENTVERSION TYPE STRING,
ORIGINALTYPE TYPE STRING,
STORAGECATEGORY TYPE STRING,
WSAPPLICATION TYPE STRING,
DOCPATH TYPE STRING,
DOCFILE TYPE STRING,
STATUSINTERN TYPE STRING,
STATUSEXTERN TYPE STRING,
APPLICATION_ID TYPE STRING,
FILE_ID TYPE STRING,
DESCRIPTION TYPE STRING,
LANGUAGE TYPE STRING,
CHECKEDIN TYPE STRING,
ACTIVE_VERSION TYPE STRING,
CREATEDAT TYPE STRING,
CHANGEDAT TYPE STRING,
CREATEDBY TYPE STRING,
CHANGEDBY TYPE STRING,
FILESIZE TYPE STRING,
MIMETYPE TYPE STRING,
STATUSDESCRIPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDG_GW_S_ORIGINALS_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_GW_S_ORIGINALS_STR-DOCUMENTTYPE sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-DOCUMENTNUMBER sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-DOCUMENTPART sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-DOCUMENTVERSION sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-ORIGINALTYPE sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-STORAGECATEGORY sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-WSAPPLICATION sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-DOCPATH sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-DOCFILE sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-STATUSINTERN sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-STATUSEXTERN sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-APPLICATION_ID sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-FILE_ID sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-DESCRIPTION sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-LANGUAGE sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-CHECKEDIN sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-ACTIVE_VERSION sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-CREATEDAT sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-CHANGEDAT sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-CREATEDBY sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-CHANGEDBY sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-FILESIZE sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-MIMETYPE sy-vline 
WA_MDG_GW_S_ORIGINALS_STR-STATUSDESCRIPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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