ABAP Select data from SAP table EDESK_TRANSFER_INSTANCES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDESK_TRANSFER_INSTANCES
*  INTO TABLE @DATA(IT_EDESK_TRANSFER_INSTANCES2).
*--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_EDESK_TRANSFER_INSTANCES INDEX 1 INTO DATA(WA_EDESK_TRANSFER_INSTANCES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDESK_TRANSFER_INSTANCES>-CONTROLLER = 1.
<EDESK_TRANSFER_INSTANCES>-ACTION = 1.
<EDESK_TRANSFER_INSTANCES>-DOCUMENTS = 1.
<EDESK_TRANSFER_INSTANCES>-CONTROLLER = 1.
<EDESK_TRANSFER_INSTANCES>-ITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDESK_TRANSFER_INSTANCES-INSTANCES, sy-vline,
  WA_EDESK_TRANSFER_INSTANCES-CONTROLLER, sy-vline,
  WA_EDESK_TRANSFER_INSTANCES-ITEM, sy-vline,
  WA_EDESK_TRANSFER_INSTANCES-PARAMETER, sy-vline,
  WA_EDESK_TRANSFER_INSTANCES-CONTROLLER, sy-vline,
  WA_EDESK_TRANSFER_INSTANCES-ITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EDESK_TRANSFER_INSTANCES 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_EDESK_TRANSFER_INSTANCES 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_EDESK_TRANSFER_INSTANCES INTO WA_EDESK_TRANSFER_INSTANCES.


*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_EDESK_TRANSFER_INSTANCES_STR, 
CONTROLLER TYPE STRING,
ACTION TYPE STRING,
DOCUMENTS TYPE STRING,
CONTROLLER TYPE STRING,
ITEM TYPE STRING,
INSTANCES TYPE STRING,
CONTROLLER TYPE STRING,
ITEM TYPE STRING,
PARAMETER TYPE STRING,
CONTROLLER TYPE STRING,
ITEM TYPE STRING,
RETURN TYPE STRING,
CONTROLLER TYPE STRING,
ITEM TYPE STRING,
SESSIONID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDESK_TRANSFER_INSTANCES_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_EDESK_TRANSFER_INSTANCES_STR-CONTROLLER sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-ACTION sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-DOCUMENTS sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-CONTROLLER sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-ITEM sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-INSTANCES sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-CONTROLLER sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-ITEM sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-PARAMETER sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-CONTROLLER sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-ITEM sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-RETURN sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-CONTROLLER sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-ITEM sy-vline 
WA_EDESK_TRANSFER_INSTANCES_STR-SESSIONID sy-vline      INTO ld_text SEPARATED BY SPACE.

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