ABAP Select data from SAP table USMD_S_ATTACHMENT_GUI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USMD_S_ATTACHMENT_GUI
*  INTO TABLE @DATA(IT_USMD_S_ATTACHMENT_GUI2).
*--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_USMD_S_ATTACHMENT_GUI INDEX 1 INTO DATA(WA_USMD_S_ATTACHMENT_GUI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USMD_S_ATTACHMENT_GUI>-USMD_CONTENT = 1.
<USMD_S_ATTACHMENT_GUI>-USMD_ACREATED_AT = 1.
<USMD_S_ATTACHMENT_GUI>-USMD_ACREATED_BY = 1.
<USMD_S_ATTACHMENT_GUI>-USMD_FILE_TYPE = 1.
<USMD_S_ATTACHMENT_GUI>-USMD_FILE_SIZE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USMD_S_ATTACHMENT_GUI-USMD_TITLE, sy-vline,
  WA_USMD_S_ATTACHMENT_GUI-USMD_LANGUAGE, sy-vline,
  WA_USMD_S_ATTACHMENT_GUI-USMD_EXPLANATION, sy-vline,
  WA_USMD_S_ATTACHMENT_GUI-USMD_LINK, sy-vline,
  WA_USMD_S_ATTACHMENT_GUI-USMD_FILE_TYPE_DESCR, sy-vline,
  WA_USMD_S_ATTACHMENT_GUI-USMD_ICON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USMD_S_ATTACHMENT_GUI 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_USMD_S_ATTACHMENT_GUI 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_USMD_S_ATTACHMENT_GUI INTO WA_USMD_S_ATTACHMENT_GUI.


*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 ISOLA, internal->external for field USMD_LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_USMD_S_ATTACHMENT_GUI-USMD_LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USMD_S_ATTACHMENT_GUI-USMD_LANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field USMD_CREQUEST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_USMD_S_ATTACHMENT_GUI-USMD_CREQUEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USMD_S_ATTACHMENT_GUI-USMD_CREQUEST.
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_USMD_S_ATTACHMENT_GUI_STR, 
USMD_CONTENT TYPE STRING,
USMD_ACREATED_AT TYPE STRING,
USMD_ACREATED_BY TYPE STRING,
USMD_FILE_TYPE TYPE STRING,
USMD_FILE_SIZE TYPE STRING,
USMD_TITLE TYPE STRING,
USMD_LANGUAGE TYPE STRING,
USMD_EXPLANATION TYPE STRING,
USMD_LINK TYPE STRING,
USMD_FILE_TYPE_DESCR TYPE STRING,
USMD_ICON TYPE STRING,
USMD_ICON_TOOLTIP TYPE STRING,
USMD_CREQUEST TYPE STRING,
USMD_FILE_NAME TYPE STRING,
USMD_ACREATED_D TYPE STRING,
USMD_ACREATED_T TYPE STRING,
USMD_FILE_SIZE_DESCR TYPE STRING,
USMD_FILE_SIZE_DESCR_BYTES TYPE STRING,
USMD_LANGUAGE_DESCR TYPE STRING,
USMD_ACREATED_BY_DESCR TYPE STRING,
SEARCH_RESULT TYPE STRING,
SEARCH_RESULT_TOOLTIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USMD_S_ATTACHMENT_GUI_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_USMD_S_ATTACHMENT_GUI_STR-USMD_CONTENT sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_ACREATED_AT sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_ACREATED_BY sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_FILE_TYPE sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_FILE_SIZE sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_TITLE sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_LANGUAGE sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_EXPLANATION sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_LINK sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_FILE_TYPE_DESCR sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_ICON sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_ICON_TOOLTIP sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_CREQUEST sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_FILE_NAME sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_ACREATED_D sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_ACREATED_T sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_FILE_SIZE_DESCR sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_FILE_SIZE_DESCR_BYTES sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_LANGUAGE_DESCR sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-USMD_ACREATED_BY_DESCR sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-SEARCH_RESULT sy-vline 
WA_USMD_S_ATTACHMENT_GUI_STR-SEARCH_RESULT_TOOLTIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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