ABAP Select data from SAP table ECATT_RFC_GET_SYSTEM_INFO_RES1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ECATT_RFC_GET_SYSTEM_INFO_RES1 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 ECATT_RFC_GET_SYSTEM_INFO_RES1. 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 ECATT_RFC_GET_SYSTEM_INFO_RES1 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_ECATT_RFC_GET_SYSTEM_INFO_RES1 TYPE STANDARD TABLE OF ECATT_RFC_GET_SYSTEM_INFO_RES1,
      WA_ECATT_RFC_GET_SYSTEM_INFO_RES1 TYPE ECATT_RFC_GET_SYSTEM_INFO_RES1,
      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: <ECATT_RFC_GET_SYSTEM_INFO_RES1> TYPE ECATT_RFC_GET_SYSTEM_INFO_RES1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ECATT_RFC_GET_SYSTEM_INFO_RES1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ECATT_RFC_GET_SYSTEM_INFO_RES1
  INTO TABLE IT_ECATT_RFC_GET_SYSTEM_INFO_RES1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ECATT_RFC_GET_SYSTEM_INFO_RES1
*  INTO TABLE @DATA(IT_ECATT_RFC_GET_SYSTEM_INFO_RES12).
*--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_ECATT_RFC_GET_SYSTEM_INFO_RES1 INDEX 1 INTO DATA(WA_ECATT_RFC_GET_SYSTEM_INFO_RES12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ECATT_RFC_GET_SYSTEM_INFO_RES1 ASSIGNING <ECATT_RFC_GET_SYSTEM_INFO_RES1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ECATT_RFC_GET_SYSTEM_INFO_RES1>-CONTROLLER = 1.
<ECATT_RFC_GET_SYSTEM_INFO_RES1>-CURRENT_RESOURCES = 1.
<ECATT_RFC_GET_SYSTEM_INFO_RES1>-DEST_COMMUNICATION_MESSAGE = 1.
<ECATT_RFC_GET_SYSTEM_INFO_RES1>-DEST_SYSTEM_MESSAGE = 1.
<ECATT_RFC_GET_SYSTEM_INFO_RES1>-DIALOG_USER_TYPE = 1.

ENDLOOP.

LOOP AT IT_ECATT_RFC_GET_SYSTEM_INFO_RES1 INTO WA_ECATT_RFC_GET_SYSTEM_INFO_RES1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ECATT_RFC_GET_SYSTEM_INFO_RES1-MAXIMAL_RESOURCES, sy-vline,
  WA_ECATT_RFC_GET_SYSTEM_INFO_RES1-RECOMMENDED_DELAY, sy-vline,
  WA_ECATT_RFC_GET_SYSTEM_INFO_RES1-RFC_LOGIN_COMPLETE, sy-vline,
  WA_ECATT_RFC_GET_SYSTEM_INFO_RES1-RFCSI_EXPORT, sy-vline,
  WA_ECATT_RFC_GET_SYSTEM_INFO_RES1-CONTROLLER, sy-vline,
  WA_ECATT_RFC_GET_SYSTEM_INFO_RES1-RFCPROTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ECATT_RFC_GET_SYSTEM_INFO_RES1 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_ECATT_RFC_GET_SYSTEM_INFO_RES1 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_ECATT_RFC_GET_SYSTEM_INFO_RES1 INTO WA_ECATT_RFC_GET_SYSTEM_INFO_RES1.


*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_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR, 
CONTROLLER TYPE STRING,
CURRENT_RESOURCES TYPE STRING,
DEST_COMMUNICATION_MESSAGE TYPE STRING,
DEST_SYSTEM_MESSAGE TYPE STRING,
DIALOG_USER_TYPE TYPE STRING,
MAXIMAL_RESOURCES TYPE STRING,
RECOMMENDED_DELAY TYPE STRING,
RFC_LOGIN_COMPLETE TYPE STRING,
RFCSI_EXPORT TYPE STRING,
CONTROLLER TYPE STRING,
RFCPROTO TYPE STRING,
RFCCHARTYP TYPE STRING,
RFCINTTYP TYPE STRING,
RFCFLOTYP TYPE STRING,
RFCDEST TYPE STRING,
RFCHOST TYPE STRING,
RFCSYSID TYPE STRING,
RFCDATABS TYPE STRING,
RFCDBHOST TYPE STRING,
RFCDBSYS TYPE STRING,
RFCSAPRL TYPE STRING,
RFCMACH TYPE STRING,
RFCOPSYS TYPE STRING,
RFCTZONE TYPE STRING,
RFCDAYST TYPE STRING,
RFCIPADDR TYPE STRING,
RFCKERNRL TYPE STRING,
RFCHOST2 TYPE STRING,
RFCSI_RESV TYPE STRING,
RFCIPV6ADDR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_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_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-CONTROLLER sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-CURRENT_RESOURCES sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-DEST_COMMUNICATION_MESSAGE sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-DEST_SYSTEM_MESSAGE sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-DIALOG_USER_TYPE sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-MAXIMAL_RESOURCES sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RECOMMENDED_DELAY sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFC_LOGIN_COMPLETE sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCSI_EXPORT sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-CONTROLLER sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCPROTO sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCCHARTYP sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCINTTYP sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCFLOTYP sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCDEST sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCHOST sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCSYSID sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCDATABS sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCDBHOST sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCDBSYS sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCSAPRL sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCMACH sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCOPSYS sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCTZONE sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCDAYST sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCIPADDR sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCKERNRL sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCHOST2 sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCSI_RESV sy-vline 
WA_ECATT_RFC_GET_SYSTEM_INFO_RES1_STR-RFCIPV6ADDR sy-vline      INTO ld_text SEPARATED BY SPACE.

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