ABAP Select data from SAP table RNV2000_INS_POL_V into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNV2000_INS_POL_V 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 RNV2000_INS_POL_V. 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 RNV2000_INS_POL_V 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_RNV2000_INS_POL_V TYPE STANDARD TABLE OF RNV2000_INS_POL_V,
      WA_RNV2000_INS_POL_V TYPE RNV2000_INS_POL_V,
      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: <RNV2000_INS_POL_V> TYPE RNV2000_INS_POL_V.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNV2000_INS_POL_V.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNV2000_INS_POL_V
  INTO TABLE IT_RNV2000_INS_POL_V.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNV2000_INS_POL_V
*  INTO TABLE @DATA(IT_RNV2000_INS_POL_V2).
*--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_RNV2000_INS_POL_V INDEX 1 INTO DATA(WA_RNV2000_INS_POL_V2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNV2000_INS_POL_V ASSIGNING <RNV2000_INS_POL_V>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNV2000_INS_POL_V>-LFDVV = 1.
<RNV2000_INS_POL_V>-VZUZA = 1.
<RNV2000_INS_POL_V>-IPID = 1.
<RNV2000_INS_POL_V>-KNAME = 1.
<RNV2000_INS_POL_V>-MGART = 1.

ENDLOOP.

LOOP AT IT_RNV2000_INS_POL_V INTO WA_RNV2000_INS_POL_V.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNV2000_INS_POL_V-VNUMM, sy-vline,
  WA_RNV2000_INS_POL_V-VKNR, sy-vline,
  WA_RNV2000_INS_POL_V-VERBI, sy-vline,
  WA_RNV2000_INS_POL_V-VSTAT, sy-vline,
  WA_RNV2000_INS_POL_V-VSTER, sy-vline,
  WA_RNV2000_INS_POL_V-PCARD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNV2000_INS_POL_V 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_RNV2000_INS_POL_V 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_RNV2000_INS_POL_V INTO WA_RNV2000_INS_POL_V.


*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 IPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNV2000_INS_POL_V-IPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNV2000_INS_POL_V-IPID.
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_RNV2000_INS_POL_V_STR, 
LFDVV TYPE STRING,
VZUZA TYPE STRING,
IPID TYPE STRING,
KNAME TYPE STRING,
MGART TYPE STRING,
VNUMM TYPE STRING,
VKNR TYPE STRING,
VERBI TYPE STRING,
VSTAT TYPE STRING,
VSTER TYPE STRING,
PCARD TYPE STRING,
VSCOD TYPE STRING,
KVDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNV2000_INS_POL_V_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_RNV2000_INS_POL_V_STR-LFDVV sy-vline 
WA_RNV2000_INS_POL_V_STR-VZUZA sy-vline 
WA_RNV2000_INS_POL_V_STR-IPID sy-vline 
WA_RNV2000_INS_POL_V_STR-KNAME sy-vline 
WA_RNV2000_INS_POL_V_STR-MGART sy-vline 
WA_RNV2000_INS_POL_V_STR-VNUMM sy-vline 
WA_RNV2000_INS_POL_V_STR-VKNR sy-vline 
WA_RNV2000_INS_POL_V_STR-VERBI sy-vline 
WA_RNV2000_INS_POL_V_STR-VSTAT sy-vline 
WA_RNV2000_INS_POL_V_STR-VSTER sy-vline 
WA_RNV2000_INS_POL_V_STR-PCARD sy-vline 
WA_RNV2000_INS_POL_V_STR-VSCOD sy-vline 
WA_RNV2000_INS_POL_V_STR-KVDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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