ABAP Select data from SAP table RNJVVP 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 RNJVVP 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 RNJVVP. 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 RNJVVP 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_RNJVVP TYPE STANDARD TABLE OF RNJVVP,
      WA_RNJVVP TYPE RNJVVP,
      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: <RNJVVP> TYPE RNJVVP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNJVVP
*  INTO TABLE @DATA(IT_RNJVVP2).
*--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_RNJVVP INDEX 1 INTO DATA(WA_RNJVVP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNJVVP>-MANDT = 1.
<RNJVVP>-PATNR = 1.
<RNJVVP>-LFDNR = 1.
<RNJVVP>-KOSTR = 1.
<RNJVVP>-SELKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNJVVP-MGART, sy-vline,
  WA_RNJVVP-UNTGR, sy-vline,
  WA_RNJVVP-VERNR, sy-vline,
  WA_RNJVVP-VERAB, sy-vline,
  WA_RNJVVP-VERBI, sy-vline,
  WA_RNJVVP-VERGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNJVVP 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_RNJVVP 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_RNJVVP INTO WA_RNJVVP.


*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_RNJVVP-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNJVVP-PATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit RANGF, internal->external for field RANGP
CALL FUNCTION 'CONVERSION_EXIT_RANGF_OUTPUT'
  EXPORTING
    input =                      WA_RNJVVP-RANGP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNJVVP-RANGP.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ADNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNJVVP-ADNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNJVVP-ADNAG.
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_RNJVVP_STR, 
MANDT TYPE STRING,
PATNR TYPE STRING,
LFDNR TYPE STRING,
KOSTR TYPE STRING,
SELKZ TYPE STRING,
MGART TYPE STRING,
UNTGR TYPE STRING,
VERNR TYPE STRING,
VERAB TYPE STRING,
VERBI TYPE STRING,
VERGE TYPE STRING,
VERNN TYPE STRING,
VERVN TYPE STRING,
VERAN TYPE STRING,
VERTI TYPE STRING,
VERNZ TYPE STRING,
VERVW TYPE STRING,
VERGB TYPE STRING,
VERLA TYPE STRING,
VERNA TYPE STRING,
VERPL TYPE STRING,
VEROR TYPE STRING,
VERST TYPE STRING,
VERTE TYPE STRING,
VERSV TYPE STRING,
BERUF TYPE STRING,
AGNUM TYPE STRING,
AGNAM TYPE STRING,
AGLAN TYPE STRING,
AGPLZ TYPE STRING,
AGORT TYPE STRING,
AGSTR TYPE STRING,
AGTEL TYPE STRING,
SZDEB TYPE STRING,
KZTXT TYPE STRING,
LGTXT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
ABREE TYPE STRING,
VKVST TYPE STRING,
VKVSE TYPE STRING,
VKNRA TYPE STRING,
RANGP TYPE STRING,
KVMAN TYPE STRING,
VTRTY TYPE STRING,
VKNUM TYPE STRING,
KVDAT TYPE STRING,
VCEND TYPE STRING,
VERVV TYPE STRING,
ADNHV TYPE STRING,
ADOHV TYPE STRING,
ADNAG TYPE STRING,
ADOAG TYPE STRING,
VERGN TYPE STRING,
VERSN TYPE STRING,
VCODE TYPE STRING,
XPRA TYPE STRING,
PATKZ TYPE STRING,
CONKZ TYPE STRING,
LFDNW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNJVVP_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_RNJVVP_STR-MANDT sy-vline 
WA_RNJVVP_STR-PATNR sy-vline 
WA_RNJVVP_STR-LFDNR sy-vline 
WA_RNJVVP_STR-KOSTR sy-vline 
WA_RNJVVP_STR-SELKZ sy-vline 
WA_RNJVVP_STR-MGART sy-vline 
WA_RNJVVP_STR-UNTGR sy-vline 
WA_RNJVVP_STR-VERNR sy-vline 
WA_RNJVVP_STR-VERAB sy-vline 
WA_RNJVVP_STR-VERBI sy-vline 
WA_RNJVVP_STR-VERGE sy-vline 
WA_RNJVVP_STR-VERNN sy-vline 
WA_RNJVVP_STR-VERVN sy-vline 
WA_RNJVVP_STR-VERAN sy-vline 
WA_RNJVVP_STR-VERTI sy-vline 
WA_RNJVVP_STR-VERNZ sy-vline 
WA_RNJVVP_STR-VERVW sy-vline 
WA_RNJVVP_STR-VERGB sy-vline 
WA_RNJVVP_STR-VERLA sy-vline 
WA_RNJVVP_STR-VERNA sy-vline 
WA_RNJVVP_STR-VERPL sy-vline 
WA_RNJVVP_STR-VEROR sy-vline 
WA_RNJVVP_STR-VERST sy-vline 
WA_RNJVVP_STR-VERTE sy-vline 
WA_RNJVVP_STR-VERSV sy-vline 
WA_RNJVVP_STR-BERUF sy-vline 
WA_RNJVVP_STR-AGNUM sy-vline 
WA_RNJVVP_STR-AGNAM sy-vline 
WA_RNJVVP_STR-AGLAN sy-vline 
WA_RNJVVP_STR-AGPLZ sy-vline 
WA_RNJVVP_STR-AGORT sy-vline 
WA_RNJVVP_STR-AGSTR sy-vline 
WA_RNJVVP_STR-AGTEL sy-vline 
WA_RNJVVP_STR-SZDEB sy-vline 
WA_RNJVVP_STR-KZTXT sy-vline 
WA_RNJVVP_STR-LGTXT sy-vline 
WA_RNJVVP_STR-ERDAT sy-vline 
WA_RNJVVP_STR-ERUSR sy-vline 
WA_RNJVVP_STR-UPDAT sy-vline 
WA_RNJVVP_STR-UPUSR sy-vline 
WA_RNJVVP_STR-STORN sy-vline 
WA_RNJVVP_STR-STUSR sy-vline 
WA_RNJVVP_STR-STDAT sy-vline 
WA_RNJVVP_STR-ABREE sy-vline 
WA_RNJVVP_STR-VKVST sy-vline 
WA_RNJVVP_STR-VKVSE sy-vline 
WA_RNJVVP_STR-VKNRA sy-vline 
WA_RNJVVP_STR-RANGP sy-vline 
WA_RNJVVP_STR-KVMAN sy-vline 
WA_RNJVVP_STR-VTRTY sy-vline 
WA_RNJVVP_STR-VKNUM sy-vline 
WA_RNJVVP_STR-KVDAT sy-vline 
WA_RNJVVP_STR-VCEND sy-vline 
WA_RNJVVP_STR-VERVV sy-vline 
WA_RNJVVP_STR-ADNHV sy-vline 
WA_RNJVVP_STR-ADOHV sy-vline 
WA_RNJVVP_STR-ADNAG sy-vline 
WA_RNJVVP_STR-ADOAG sy-vline 
WA_RNJVVP_STR-VERGN sy-vline 
WA_RNJVVP_STR-VERSN sy-vline 
WA_RNJVVP_STR-VCODE sy-vline 
WA_RNJVVP_STR-XPRA sy-vline 
WA_RNJVVP_STR-PATKZ sy-vline 
WA_RNJVVP_STR-CONKZ sy-vline 
WA_RNJVVP_STR-LFDNW sy-vline      INTO ld_text SEPARATED BY SPACE.

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