ABAP Select data from SAP table RCGSVC 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 RCGSVC 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 RCGSVC. 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 RCGSVC 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_RCGSVC TYPE STANDARD TABLE OF RCGSVC,
      WA_RCGSVC TYPE RCGSVC,
      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: <RCGSVC> TYPE RCGSVC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGSVC
*  INTO TABLE @DATA(IT_RCGSVC2).
*--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_RCGSVC INDEX 1 INTO DATA(WA_RCGSVC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGSVC>-RECN = 1.
<RCGSVC>-SVC_NAME = 1.
<RCGSVC>-SVC_DISPL = 1.
<RCGSVC>-SVC_DESC = 1.
<RCGSVC>-SVC_STARTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGSVC-SVC_STARTTYPE_TXT, sy-vline,
  WA_RCGSVC-SVC_STATUS, sy-vline,
  WA_RCGSVC-SVC_STATUS_TXT, sy-vline,
  WA_RCGSVC-SVC_HOST, sy-vline,
  WA_RCGSVC-SVC_IPADDR, sy-vline,
  WA_RCGSVC-SVC_PATH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGSVC 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_RCGSVC 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_RCGSVC INTO WA_RCGSVC.


*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 RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGSVC-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSVC-RECN.
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_RCGSVC_STR, 
RECN TYPE STRING,
SVC_NAME TYPE STRING,
SVC_DISPL TYPE STRING,
SVC_DESC TYPE STRING,
SVC_STARTTYPE TYPE STRING,
SVC_STARTTYPE_TXT TYPE STRING,
SVC_STATUS TYPE STRING,
SVC_STATUS_TXT TYPE STRING,
SVC_HOST TYPE STRING,
SVC_IPADDR TYPE STRING,
SVC_PATH TYPE STRING,
SVC_START_PARAMS TYPE STRING,
SVC_TYPE TYPE STRING,
SVC_WATCH_IND TYPE STRING,
DISABLED TYPE STRING,
LOCAL_SYSTEM_IND TYPE STRING,
SVC_USR TYPE STRING,
SVC_PWD TYPE STRING,
DEST TYPE STRING,
PROGID TYPE STRING,
TYPE TYPE STRING,
GWHOST TYPE STRING,
GWSERV TYPE STRING,
TRACE_FLG TYPE STRING,
RFC_OPTIONS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGSVC_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_RCGSVC_STR-RECN sy-vline 
WA_RCGSVC_STR-SVC_NAME sy-vline 
WA_RCGSVC_STR-SVC_DISPL sy-vline 
WA_RCGSVC_STR-SVC_DESC sy-vline 
WA_RCGSVC_STR-SVC_STARTTYPE sy-vline 
WA_RCGSVC_STR-SVC_STARTTYPE_TXT sy-vline 
WA_RCGSVC_STR-SVC_STATUS sy-vline 
WA_RCGSVC_STR-SVC_STATUS_TXT sy-vline 
WA_RCGSVC_STR-SVC_HOST sy-vline 
WA_RCGSVC_STR-SVC_IPADDR sy-vline 
WA_RCGSVC_STR-SVC_PATH sy-vline 
WA_RCGSVC_STR-SVC_START_PARAMS sy-vline 
WA_RCGSVC_STR-SVC_TYPE sy-vline 
WA_RCGSVC_STR-SVC_WATCH_IND sy-vline 
WA_RCGSVC_STR-DISABLED sy-vline 
WA_RCGSVC_STR-LOCAL_SYSTEM_IND sy-vline 
WA_RCGSVC_STR-SVC_USR sy-vline 
WA_RCGSVC_STR-SVC_PWD sy-vline 
WA_RCGSVC_STR-DEST sy-vline 
WA_RCGSVC_STR-PROGID sy-vline 
WA_RCGSVC_STR-TYPE sy-vline 
WA_RCGSVC_STR-GWHOST sy-vline 
WA_RCGSVC_STR-GWSERV sy-vline 
WA_RCGSVC_STR-TRACE_FLG sy-vline 
WA_RCGSVC_STR-RFC_OPTIONS sy-vline      INTO ld_text SEPARATED BY SPACE.

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