ABAP Select data from SAP table RNSHR 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 RNSHR 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 RNSHR. 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 RNSHR 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_RNSHR TYPE STANDARD TABLE OF RNSHR,
      WA_RNSHR TYPE RNSHR,
      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: <RNSHR> TYPE RNSHR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNSHR
*  INTO TABLE @DATA(IT_RNSHR2).
*--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_RNSHR INDEX 1 INTO DATA(WA_RNSHR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNSHR>-ERUSR = 1.
<RNSHR>-ERDAT = 1.
<RNSHR>-ERTIM = 1.
<RNSHR>-ERTIMX = 1.
<RNSHR>-UPUSR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNSHR-UPDAT, sy-vline,
  WA_RNSHR-STORN, sy-vline,
  WA_RNSHR-STUSR, sy-vline,
  WA_RNSHR-STDAT, sy-vline,
  WA_RNSHR-LOEKZ, sy-vline,
  WA_RNSHR-LOUSR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNSHR 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_RNSHR 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_RNSHR INTO WA_RNSHR.


*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 DYNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNSHR-DYNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNSHR-DYNNR.
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_RNSHR_STR, 
ERUSR TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERTIMX TYPE STRING,
UPUSR TYPE STRING,
UPDAT TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
FRTIT TYPE STRING,
FLREC TYPE STRING,
DLFLG TYPE STRING,
CNFLG TYPE STRING,
PNAME TYPE STRING,
DYNNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNSHR_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_RNSHR_STR-ERUSR sy-vline 
WA_RNSHR_STR-ERDAT sy-vline 
WA_RNSHR_STR-ERTIM sy-vline 
WA_RNSHR_STR-ERTIMX sy-vline 
WA_RNSHR_STR-UPUSR sy-vline 
WA_RNSHR_STR-UPDAT sy-vline 
WA_RNSHR_STR-STORN sy-vline 
WA_RNSHR_STR-STUSR sy-vline 
WA_RNSHR_STR-STDAT sy-vline 
WA_RNSHR_STR-LOEKZ sy-vline 
WA_RNSHR_STR-LOUSR sy-vline 
WA_RNSHR_STR-LODAT sy-vline 
WA_RNSHR_STR-FRTIT sy-vline 
WA_RNSHR_STR-FLREC sy-vline 
WA_RNSHR_STR-DLFLG sy-vline 
WA_RNSHR_STR-CNFLG sy-vline 
WA_RNSHR_STR-PNAME sy-vline 
WA_RNSHR_STR-DYNNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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