ABAP Select data from SAP table RNFPC1 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 RNFPC1 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 RNFPC1. 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 RNFPC1 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_RNFPC1 TYPE STANDARD TABLE OF RNFPC1,
      WA_RNFPC1 TYPE RNFPC1,
      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: <RNFPC1> TYPE RNFPC1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNFPC1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNFPC1
  INTO TABLE IT_RNFPC1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNFPC1
*  INTO TABLE @DATA(IT_RNFPC12).
*--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_RNFPC1 INDEX 1 INTO DATA(WA_RNFPC12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNFPC1 ASSIGNING <RNFPC1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNFPC1>-EINBZ = 1.
<RNFPC1>-PSTLZ = 1.
<RNFPC1>-LAND = 1.
<RNFPC1>-ORT = 1.
<RNFPC1>-STRAS = 1.

ENDLOOP.

LOOP AT IT_RNFPC1 INTO WA_RNFPC1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNFPC1-GESAMTBETRAG, sy-vline,
  WA_RNFPC1-LASTOE, sy-vline,
  WA_RNFPC1-OCR, sy-vline,
  WA_RNFPC1-WAERS, sy-vline,
  WA_RNFPC1-GSCHL, sy-vline,
  WA_RNFPC1-CLASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNFPC1 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_RNFPC1 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_RNFPC1 INTO WA_RNFPC1.


*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 LASTOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFPC1-LASTOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFPC1-LASTOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CLASS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFPC1-CLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFPC1-CLASS.
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_RNFPC1_STR, 
EINBZ TYPE STRING,
PSTLZ TYPE STRING,
LAND TYPE STRING,
ORT TYPE STRING,
STRAS TYPE STRING,
GESAMTBETRAG TYPE STRING,
LASTOE TYPE STRING,
OCR TYPE STRING,
WAERS TYPE STRING,
GSCHL TYPE STRING,
CLASS TYPE STRING,
PACO TYPE STRING,
CONCATPAT TYPE STRING,
ANTXT TYPE STRING,
ORT2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNFPC1_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_RNFPC1_STR-EINBZ sy-vline 
WA_RNFPC1_STR-PSTLZ sy-vline 
WA_RNFPC1_STR-LAND sy-vline 
WA_RNFPC1_STR-ORT sy-vline 
WA_RNFPC1_STR-STRAS sy-vline 
WA_RNFPC1_STR-GESAMTBETRAG sy-vline 
WA_RNFPC1_STR-LASTOE sy-vline 
WA_RNFPC1_STR-OCR sy-vline 
WA_RNFPC1_STR-WAERS sy-vline 
WA_RNFPC1_STR-GSCHL sy-vline 
WA_RNFPC1_STR-CLASS sy-vline 
WA_RNFPC1_STR-PACO sy-vline 
WA_RNFPC1_STR-CONCATPAT sy-vline 
WA_RNFPC1_STR-ANTXT sy-vline 
WA_RNFPC1_STR-ORT2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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