ABAP Select data from SAP table RFCSTXTAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFCSTXTAB
*  INTO TABLE @DATA(IT_RFCSTXTAB2).
*--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_RFCSTXTAB INDEX 1 INTO DATA(WA_RFCSTXTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFCSTXTAB>-EYEON = 1.
<RFCSTXTAB>-SENDERFLAG = 1.
<RFCSTXTAB>-RFCDATE = 1.
<RFCSTXTAB>-RFCTIME = 1.
<RFCSTXTAB>-CONVERID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFCSTXTAB-CALLS, sy-vline,
  WA_RFCSTXTAB-CALLTIME, sy-vline,
  WA_RFCSTXTAB-SEND, sy-vline,
  WA_RFCSTXTAB-RECEIVE, sy-vline,
  WA_RFCSTXTAB-EXECTIME, sy-vline,
  WA_RFCSTXTAB-REXETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFCSTXTAB 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_RFCSTXTAB 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_RFCSTXTAB INTO WA_RFCSTXTAB.


*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_RFCSTXTAB_STR, 
EYEON TYPE STRING,
SENDERFLAG TYPE STRING,
RFCDATE TYPE STRING,
RFCTIME TYPE STRING,
CONVERID TYPE STRING,
CALLS TYPE STRING,
CALLTIME TYPE STRING,
SEND TYPE STRING,
RECEIVE TYPE STRING,
EXECTIME TYPE STRING,
REXETIME TYPE STRING,
DEST TYPE STRING,
IP TYPE STRING,
REMOTEDEST TYPE STRING,
REMOTEIP TYPE STRING,
RFCUSER TYPE STRING,
CALLER TYPE STRING,
TARGET TYPE STRING,
PROGNAME TYPE STRING,
FUNCNAME TYPE STRING,
TID TYPE STRING,
VERSION TYPE STRING,
FILLER2 TYPE STRING,
EYEOFF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFCSTXTAB_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_RFCSTXTAB_STR-EYEON sy-vline 
WA_RFCSTXTAB_STR-SENDERFLAG sy-vline 
WA_RFCSTXTAB_STR-RFCDATE sy-vline 
WA_RFCSTXTAB_STR-RFCTIME sy-vline 
WA_RFCSTXTAB_STR-CONVERID sy-vline 
WA_RFCSTXTAB_STR-CALLS sy-vline 
WA_RFCSTXTAB_STR-CALLTIME sy-vline 
WA_RFCSTXTAB_STR-SEND sy-vline 
WA_RFCSTXTAB_STR-RECEIVE sy-vline 
WA_RFCSTXTAB_STR-EXECTIME sy-vline 
WA_RFCSTXTAB_STR-REXETIME sy-vline 
WA_RFCSTXTAB_STR-DEST sy-vline 
WA_RFCSTXTAB_STR-IP sy-vline 
WA_RFCSTXTAB_STR-REMOTEDEST sy-vline 
WA_RFCSTXTAB_STR-REMOTEIP sy-vline 
WA_RFCSTXTAB_STR-RFCUSER sy-vline 
WA_RFCSTXTAB_STR-CALLER sy-vline 
WA_RFCSTXTAB_STR-TARGET sy-vline 
WA_RFCSTXTAB_STR-PROGNAME sy-vline 
WA_RFCSTXTAB_STR-FUNCNAME sy-vline 
WA_RFCSTXTAB_STR-TID sy-vline 
WA_RFCSTXTAB_STR-VERSION sy-vline 
WA_RFCSTXTAB_STR-FILLER2 sy-vline 
WA_RFCSTXTAB_STR-EYEOFF sy-vline      INTO ld_text SEPARATED BY SPACE.

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