ABAP Select data from SAP table RNJRSF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNJRSF
*  INTO TABLE @DATA(IT_RNJRSF2).
*--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_RNJRSF INDEX 1 INTO DATA(WA_RNJRSF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNJRSF>-MANDT = 1.
<RNJRSF>-PATNR = 1.
<RNJRSF>-RSFNR = 1.
<RNJRSF>-LFDNR = 1.
<RNJRSF>-KZTXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNJRSF-LGTXT, sy-vline,
  WA_RNJRSF-LOEKZ, sy-vline,
  WA_RNJRSF-LOUSR, sy-vline,
  WA_RNJRSF-LODAT, sy-vline,
  WA_RNJRSF-ERUSR, sy-vline,
  WA_RNJRSF-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNJRSF 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_RNJRSF 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_RNJRSF INTO WA_RNJRSF.


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

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

*Conversion exit ALPHA, internal->external for field DOCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNJRSF-DOCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNJRSF-DOCTR.
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_RNJRSF_STR, 
MANDT TYPE STRING,
PATNR TYPE STRING,
RSFNR TYPE STRING,
LFDNR TYPE STRING,
KZTXT TYPE STRING,
LGTXT TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
ERUSR TYPE STRING,
ERDAT TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
DOCTR TYPE STRING,
REPDT TYPE STRING,
ROUTE TYPE STRING,
ORGAN TYPE STRING,
PROBA TYPE STRING,
REACT TYPE STRING,
EXIST TYPE STRING,
CSTAT TYPE STRING,
ERTIM TYPE STRING,
UPTIM TYPE STRING,
EREASON TYPE STRING,
PATKZ TYPE STRING,
CONKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNJRSF_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_RNJRSF_STR-MANDT sy-vline 
WA_RNJRSF_STR-PATNR sy-vline 
WA_RNJRSF_STR-RSFNR sy-vline 
WA_RNJRSF_STR-LFDNR sy-vline 
WA_RNJRSF_STR-KZTXT sy-vline 
WA_RNJRSF_STR-LGTXT sy-vline 
WA_RNJRSF_STR-LOEKZ sy-vline 
WA_RNJRSF_STR-LOUSR sy-vline 
WA_RNJRSF_STR-LODAT sy-vline 
WA_RNJRSF_STR-ERUSR sy-vline 
WA_RNJRSF_STR-ERDAT sy-vline 
WA_RNJRSF_STR-UPDAT sy-vline 
WA_RNJRSF_STR-UPUSR sy-vline 
WA_RNJRSF_STR-DOCTR sy-vline 
WA_RNJRSF_STR-REPDT sy-vline 
WA_RNJRSF_STR-ROUTE sy-vline 
WA_RNJRSF_STR-ORGAN sy-vline 
WA_RNJRSF_STR-PROBA sy-vline 
WA_RNJRSF_STR-REACT sy-vline 
WA_RNJRSF_STR-EXIST sy-vline 
WA_RNJRSF_STR-CSTAT sy-vline 
WA_RNJRSF_STR-ERTIM sy-vline 
WA_RNJRSF_STR-UPTIM sy-vline 
WA_RNJRSF_STR-EREASON sy-vline 
WA_RNJRSF_STR-PATKZ sy-vline 
WA_RNJRSF_STR-CONKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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