ABAP Select data from SAP table RCCS_RFC_BUF_FUNC_PARAM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCCS_RFC_BUF_FUNC_PARAM
*  INTO TABLE @DATA(IT_RCCS_RFC_BUF_FUNC_PARAM2).
*--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_RCCS_RFC_BUF_FUNC_PARAM INDEX 1 INTO DATA(WA_RCCS_RFC_BUF_FUNC_PARAM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCCS_RFC_BUF_FUNC_PARAM>-FUNCNAME = 1.
<RCCS_RFC_BUF_FUNC_PARAM>-PARAMCLASS = 1.
<RCCS_RFC_BUF_FUNC_PARAM>-PARAM = 1.
<RCCS_RFC_BUF_FUNC_PARAM>-TABNAME = 1.
<RCCS_RFC_BUF_FUNC_PARAM>-FIELDNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCCS_RFC_BUF_FUNC_PARAM-EXID, sy-vline,
  WA_RCCS_RFC_BUF_FUNC_PARAM-POS, sy-vline,
  WA_RCCS_RFC_BUF_FUNC_PARAM-OFFSETP, sy-vline,
  WA_RCCS_RFC_BUF_FUNC_PARAM-INTLENGTH, sy-vline,
  WA_RCCS_RFC_BUF_FUNC_PARAM-DECIMALS, sy-vline,
  WA_RCCS_RFC_BUF_FUNC_PARAM-DEFAULTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCCS_RFC_BUF_FUNC_PARAM 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_RCCS_RFC_BUF_FUNC_PARAM 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_RCCS_RFC_BUF_FUNC_PARAM INTO WA_RCCS_RFC_BUF_FUNC_PARAM.


*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_RCCS_RFC_BUF_FUNC_PARAM_STR, 
FUNCNAME TYPE STRING,
PARAMCLASS TYPE STRING,
PARAM TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
EXID TYPE STRING,
POS TYPE STRING,
OFFSETP TYPE STRING,
INTLENGTH TYPE STRING,
DECIMALS TYPE STRING,
DEFAULTP TYPE STRING,
PARAMTEXT TYPE STRING,
OPTIONAL TYPE STRING,
LAST_CHECKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCCS_RFC_BUF_FUNC_PARAM_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_RCCS_RFC_BUF_FUNC_PARAM_STR-FUNCNAME sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-PARAMCLASS sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-PARAM sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-TABNAME sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-FIELDNAME sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-EXID sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-POS sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-OFFSETP sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-INTLENGTH sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-DECIMALS sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-DEFAULTP sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-PARAMTEXT sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-OPTIONAL sy-vline 
WA_RCCS_RFC_BUF_FUNC_PARAM_STR-LAST_CHECKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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