ABAP Select data from SAP table RNPAT_NAME into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPAT_NAME
*  INTO TABLE @DATA(IT_RNPAT_NAME2).
*--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_RNPAT_NAME INDEX 1 INTO DATA(WA_RNPAT_NAME2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPAT_NAME>-NNAME = 1.
<RNPAT_NAME>-VNAME = 1.
<RNPAT_NAME>-GBNAM = 1.
<RNPAT_NAME>-GBDAT = 1.
<RNPAT_NAME>-GSCHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPAT_NAME-GSCHLE, sy-vline,
  WA_RNPAT_NAME-GSCHLTXT, sy-vline,
  WA_RNPAT_NAME-ANREX, sy-vline,
  WA_RNPAT_NAME-TITEL, sy-vline,
  WA_RNPAT_NAME-NAMZU, sy-vline,
  WA_RNPAT_NAME-VORSW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPAT_NAME 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_RNPAT_NAME 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_RNPAT_NAME INTO WA_RNPAT_NAME.


*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_RNPAT_NAME_STR, 
NNAME TYPE STRING,
VNAME TYPE STRING,
GBNAM TYPE STRING,
GBDAT TYPE STRING,
GSCHL TYPE STRING,
GSCHLE TYPE STRING,
GSCHLTXT TYPE STRING,
ANREX TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
NAME2 TYPE STRING,
NATIO TYPE STRING,
NATXT TYPE STRING,
RESID TYPE STRING,
UNKNOWN_GBDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPAT_NAME_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_RNPAT_NAME_STR-NNAME sy-vline 
WA_RNPAT_NAME_STR-VNAME sy-vline 
WA_RNPAT_NAME_STR-GBNAM sy-vline 
WA_RNPAT_NAME_STR-GBDAT sy-vline 
WA_RNPAT_NAME_STR-GSCHL sy-vline 
WA_RNPAT_NAME_STR-GSCHLE sy-vline 
WA_RNPAT_NAME_STR-GSCHLTXT sy-vline 
WA_RNPAT_NAME_STR-ANREX sy-vline 
WA_RNPAT_NAME_STR-TITEL sy-vline 
WA_RNPAT_NAME_STR-NAMZU sy-vline 
WA_RNPAT_NAME_STR-VORSW sy-vline 
WA_RNPAT_NAME_STR-NAME2 sy-vline 
WA_RNPAT_NAME_STR-NATIO sy-vline 
WA_RNPAT_NAME_STR-NATXT sy-vline 
WA_RNPAT_NAME_STR-RESID sy-vline 
WA_RNPAT_NAME_STR-UNKNOWN_GBDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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