ABAP Select data from SAP table ETTP_FRONTEND_USER_INFO into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETTP_FRONTEND_USER_INFO
*  INTO TABLE @DATA(IT_ETTP_FRONTEND_USER_INFO2).
*--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_ETTP_FRONTEND_USER_INFO INDEX 1 INTO DATA(WA_ETTP_FRONTEND_USER_INFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETTP_FRONTEND_USER_INFO>-USERNAME = 1.
<ETTP_FRONTEND_USER_INFO>-PROXYTYPE = 1.
<ETTP_FRONTEND_USER_INFO>-SYSTEMID = 1.
<ETTP_FRONTEND_USER_INFO>-CLIENTNR = 1.
<ETTP_FRONTEND_USER_INFO>-PROGRAMMID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETTP_FRONTEND_USER_INFO-HOSTADRESS, sy-vline,
  WA_ETTP_FRONTEND_USER_INFO-HOSTPORT, sy-vline,
  WA_ETTP_FRONTEND_USER_INFO-RFCGWHOST, sy-vline,
  WA_ETTP_FRONTEND_USER_INFO-RFCGWSERV, sy-vline,
  WA_ETTP_FRONTEND_USER_INFO-RFCDEST, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_ETTP_FRONTEND_USER_INFO 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_ETTP_FRONTEND_USER_INFO 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_ETTP_FRONTEND_USER_INFO INTO WA_ETTP_FRONTEND_USER_INFO.


*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_ETTP_FRONTEND_USER_INFO_STR, 
USERNAME TYPE STRING,
PROXYTYPE TYPE STRING,
SYSTEMID TYPE STRING,
CLIENTNR TYPE STRING,
PROGRAMMID TYPE STRING,
HOSTADRESS TYPE STRING,
HOSTPORT TYPE STRING,
RFCGWHOST TYPE STRING,
RFCGWSERV TYPE STRING,
RFCDEST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETTP_FRONTEND_USER_INFO_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_ETTP_FRONTEND_USER_INFO_STR-USERNAME sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-PROXYTYPE sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-SYSTEMID sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-CLIENTNR sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-PROGRAMMID sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-HOSTADRESS sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-HOSTPORT sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-RFCGWHOST sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-RFCGWSERV sy-vline 
WA_ETTP_FRONTEND_USER_INFO_STR-RFCDEST sy-vline      INTO ld_text SEPARATED BY SPACE.

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