ABAP Select data from SAP table RNSFHDIA 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 RNSFHDIA 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 RNSFHDIA. 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 RNSFHDIA 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_RNSFHDIA TYPE STANDARD TABLE OF RNSFHDIA,
      WA_RNSFHDIA TYPE RNSFHDIA,
      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: <RNSFHDIA> TYPE RNSFHDIA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNSFHDIA
*  INTO TABLE @DATA(IT_RNSFHDIA2).
*--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_RNSFHDIA INDEX 1 INTO DATA(WA_RNSFHDIA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNSFHDIA>-FALNR = 1.
<RNSFHDIA>-FACHR = 1.
<RNSFHDIA>-ORGID = 1.
<RNSFHDIA>-LFDNR = 1.
<RNSFHDIA>-DKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNSFHDIA-ANZOP, sy-vline,
  WA_RNSFHDIA-PFTAGE, sy-vline,
  WA_RNSFHDIA-BEGDT, sy-vline,
  WA_RNSFHDIA-ENDDT, sy-vline,
  WA_RNSFHDIA-DIADT, sy-vline,
  WA_RNSFHDIA-DIAZT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNSFHDIA 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_RNSFHDIA 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_RNSFHDIA INTO WA_RNSFHDIA.


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

*Conversion exit ALPHA, internal->external for field FACHR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNSFHDIA-FACHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNSFHDIA-FACHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNSFHDIA-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNSFHDIA-ORGID.
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_RNSFHDIA_STR, 
FALNR TYPE STRING,
FACHR TYPE STRING,
ORGID TYPE STRING,
LFDNR TYPE STRING,
DKEY TYPE STRING,
ANZOP TYPE STRING,
PFTAGE TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
DIADT TYPE STRING,
DIAZT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNSFHDIA_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_RNSFHDIA_STR-FALNR sy-vline 
WA_RNSFHDIA_STR-FACHR sy-vline 
WA_RNSFHDIA_STR-ORGID sy-vline 
WA_RNSFHDIA_STR-LFDNR sy-vline 
WA_RNSFHDIA_STR-DKEY sy-vline 
WA_RNSFHDIA_STR-ANZOP sy-vline 
WA_RNSFHDIA_STR-PFTAGE sy-vline 
WA_RNSFHDIA_STR-BEGDT sy-vline 
WA_RNSFHDIA_STR-ENDDT sy-vline 
WA_RNSFHDIA_STR-DIADT sy-vline 
WA_RNSFHDIA_STR-DIAZT sy-vline      INTO ld_text SEPARATED BY SPACE.

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