ABAP Select data from SAP table RCGSVCINSTALL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCGSVCINSTALL 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 RCGSVCINSTALL. 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 RCGSVCINSTALL 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_RCGSVCINSTALL TYPE STANDARD TABLE OF RCGSVCINSTALL,
      WA_RCGSVCINSTALL TYPE RCGSVCINSTALL,
      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: <RCGSVCINSTALL> TYPE RCGSVCINSTALL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGSVCINSTALL
*  INTO TABLE @DATA(IT_RCGSVCINSTALL2).
*--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_RCGSVCINSTALL INDEX 1 INTO DATA(WA_RCGSVCINSTALL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGSVCINSTALL>-FLG_SYN_WWI = 1.
<RCGSVCINSTALL>-FLG_EASY_EXPERT = 1.
<RCGSVCINSTALL>-RECN = 1.
<RCGSVCINSTALL>-SVC_NAME = 1.
<RCGSVCINSTALL>-SVC_DISPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGSVCINSTALL-SVC_DESC, sy-vline,
  WA_RCGSVCINSTALL-SVC_STARTTYPE, sy-vline,
  WA_RCGSVCINSTALL-SVC_STARTTYPE_TXT, sy-vline,
  WA_RCGSVCINSTALL-SVC_STATUS, sy-vline,
  WA_RCGSVCINSTALL-SVC_STATUS_TXT, sy-vline,
  WA_RCGSVCINSTALL-SVC_HOST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGSVCINSTALL 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_RCGSVCINSTALL 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_RCGSVCINSTALL INTO WA_RCGSVCINSTALL.


*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_RCGSVCINSTALL-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSVCINSTALL-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_RCGSVCINSTALL_STR, 
FLG_SYN_WWI TYPE STRING,
FLG_EASY_EXPERT TYPE STRING,
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,
GENPC TYPE STRING,
RFCDEST TYPE STRING,
WWIANCHOR TYPE STRING,
PCACTIVE TYPE STRING,
RSTRTDELAY TYPE STRING,
WPVARIANT TYPE STRING,
MANDT TYPE STRING,
WWIDEST TYPE STRING,
WWIDESTTYP TYPE STRING,
PRTYPE TYPE STRING,
ASSIGNABLE TYPE STRING,
PROCESSCAT TYPE STRING,
COMPONENT TYPE STRING,
WINPR TYPE STRING,
SERVICE_USAGE TYPE STRING,
LABREQ_WWISRVID TYPE STRING,
LABREQ_RFCDEST TYPE STRING,
LABREQ_FORMAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGSVCINSTALL_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_RCGSVCINSTALL_STR-FLG_SYN_WWI sy-vline 
WA_RCGSVCINSTALL_STR-FLG_EASY_EXPERT sy-vline 
WA_RCGSVCINSTALL_STR-RECN sy-vline 
WA_RCGSVCINSTALL_STR-SVC_NAME sy-vline 
WA_RCGSVCINSTALL_STR-SVC_DISPL sy-vline 
WA_RCGSVCINSTALL_STR-SVC_DESC sy-vline 
WA_RCGSVCINSTALL_STR-SVC_STARTTYPE sy-vline 
WA_RCGSVCINSTALL_STR-SVC_STARTTYPE_TXT sy-vline 
WA_RCGSVCINSTALL_STR-SVC_STATUS sy-vline 
WA_RCGSVCINSTALL_STR-SVC_STATUS_TXT sy-vline 
WA_RCGSVCINSTALL_STR-SVC_HOST sy-vline 
WA_RCGSVCINSTALL_STR-SVC_IPADDR sy-vline 
WA_RCGSVCINSTALL_STR-SVC_PATH sy-vline 
WA_RCGSVCINSTALL_STR-SVC_START_PARAMS sy-vline 
WA_RCGSVCINSTALL_STR-SVC_TYPE sy-vline 
WA_RCGSVCINSTALL_STR-SVC_WATCH_IND sy-vline 
WA_RCGSVCINSTALL_STR-DISABLED sy-vline 
WA_RCGSVCINSTALL_STR-LOCAL_SYSTEM_IND sy-vline 
WA_RCGSVCINSTALL_STR-SVC_USR sy-vline 
WA_RCGSVCINSTALL_STR-SVC_PWD sy-vline 
WA_RCGSVCINSTALL_STR-DEST sy-vline 
WA_RCGSVCINSTALL_STR-PROGID sy-vline 
WA_RCGSVCINSTALL_STR-TYPE sy-vline 
WA_RCGSVCINSTALL_STR-GWHOST sy-vline 
WA_RCGSVCINSTALL_STR-GWSERV sy-vline 
WA_RCGSVCINSTALL_STR-TRACE_FLG sy-vline 
WA_RCGSVCINSTALL_STR-RFC_OPTIONS sy-vline 
WA_RCGSVCINSTALL_STR-GENPC sy-vline 
WA_RCGSVCINSTALL_STR-RFCDEST sy-vline 
WA_RCGSVCINSTALL_STR-WWIANCHOR sy-vline 
WA_RCGSVCINSTALL_STR-PCACTIVE sy-vline 
WA_RCGSVCINSTALL_STR-RSTRTDELAY sy-vline 
WA_RCGSVCINSTALL_STR-WPVARIANT sy-vline 
WA_RCGSVCINSTALL_STR-MANDT sy-vline 
WA_RCGSVCINSTALL_STR-WWIDEST sy-vline 
WA_RCGSVCINSTALL_STR-WWIDESTTYP sy-vline 
WA_RCGSVCINSTALL_STR-PRTYPE sy-vline 
WA_RCGSVCINSTALL_STR-ASSIGNABLE sy-vline 
WA_RCGSVCINSTALL_STR-PROCESSCAT sy-vline 
WA_RCGSVCINSTALL_STR-COMPONENT sy-vline 
WA_RCGSVCINSTALL_STR-WINPR sy-vline 
WA_RCGSVCINSTALL_STR-SERVICE_USAGE sy-vline 
WA_RCGSVCINSTALL_STR-LABREQ_WWISRVID sy-vline 
WA_RCGSVCINSTALL_STR-LABREQ_RFCDEST sy-vline 
WA_RCGSVCINSTALL_STR-LABREQ_FORMAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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