ABAP Select data from SAP table RNDVV1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNDVV1 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 RNDVV1. 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 RNDVV1 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_RNDVV1 TYPE STANDARD TABLE OF RNDVV1,
      WA_RNDVV1 TYPE RNDVV1,
      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: <RNDVV1> TYPE RNDVV1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNDVV1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNDVV1
  INTO TABLE IT_RNDVV1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNDVV1
*  INTO TABLE @DATA(IT_RNDVV12).
*--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_RNDVV1 INDEX 1 INTO DATA(WA_RNDVV12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNDVV1 ASSIGNING <RNDVV1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNDVV1>-MARK = 1.
<RNDVV1>-KOSTR = 1.
<RNDVV1>-LFDNR = 1.
<RNDVV1>-VKOST = 1.
<RNDVV1>-VZUZA = 1.

ENDLOOP.

LOOP AT IT_RNDVV1 INTO WA_RNDVV1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNDVV1-KNAME, sy-vline,
  WA_RNDVV1-KTNAM, sy-vline,
  WA_RNDVV1-KTADR, sy-vline,
  WA_RNDVV1-VERAB, sy-vline,
  WA_RNDVV1-VERBI, sy-vline,
  WA_RNDVV1-VERNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNDVV1 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_RNDVV1 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_RNDVV1 INTO WA_RNDVV1.


*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 KOSTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDVV1-KOSTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDVV1-KOSTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RANGF, internal->external for field RANGF
CALL FUNCTION 'CONVERSION_EXIT_RANGF_OUTPUT'
  EXPORTING
    input =                      WA_RNDVV1-RANGF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDVV1-RANGF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RANGC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDVV1-RANGC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDVV1-RANGC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RANGF, internal->external for field RANGP
CALL FUNCTION 'CONVERSION_EXIT_RANGF_OUTPUT'
  EXPORTING
    input =                      WA_RNDVV1-RANGP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDVV1-RANGP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RANGQ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDVV1-RANGQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDVV1-RANGQ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NZZGR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDVV1-NZZGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDVV1-NZZGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDVV1-VTTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDVV1-VTTYP.
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_RNDVV1_STR, 
MARK TYPE STRING,
KOSTR TYPE STRING,
LFDNR TYPE STRING,
VKOST TYPE STRING,
VZUZA TYPE STRING,
KNAME TYPE STRING,
KTNAM TYPE STRING,
KTADR TYPE STRING,
VERAB TYPE STRING,
VERBI TYPE STRING,
VERNR TYPE STRING,
MGART TYPE STRING,
MTEXT TYPE STRING,
VFALL TYPE STRING,
RANGF TYPE STRING,
RANGC TYPE STRING,
CLDES TYPE STRING,
RANGP TYPE STRING,
RANGQ TYPE STRING,
PFLZZ TYPE STRING,
BTRZZ TYPE STRING,
NZZGR TYPE STRING,
NZZTX TYPE STRING,
POAKT TYPE STRING,
POGES TYPE STRING,
VTAGE TYPE STRING,
ZTAGE TYPE STRING,
VTTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNDVV1_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_RNDVV1_STR-MARK sy-vline 
WA_RNDVV1_STR-KOSTR sy-vline 
WA_RNDVV1_STR-LFDNR sy-vline 
WA_RNDVV1_STR-VKOST sy-vline 
WA_RNDVV1_STR-VZUZA sy-vline 
WA_RNDVV1_STR-KNAME sy-vline 
WA_RNDVV1_STR-KTNAM sy-vline 
WA_RNDVV1_STR-KTADR sy-vline 
WA_RNDVV1_STR-VERAB sy-vline 
WA_RNDVV1_STR-VERBI sy-vline 
WA_RNDVV1_STR-VERNR sy-vline 
WA_RNDVV1_STR-MGART sy-vline 
WA_RNDVV1_STR-MTEXT sy-vline 
WA_RNDVV1_STR-VFALL sy-vline 
WA_RNDVV1_STR-RANGF sy-vline 
WA_RNDVV1_STR-RANGC sy-vline 
WA_RNDVV1_STR-CLDES sy-vline 
WA_RNDVV1_STR-RANGP sy-vline 
WA_RNDVV1_STR-RANGQ sy-vline 
WA_RNDVV1_STR-PFLZZ sy-vline 
WA_RNDVV1_STR-BTRZZ sy-vline 
WA_RNDVV1_STR-NZZGR sy-vline 
WA_RNDVV1_STR-NZZTX sy-vline 
WA_RNDVV1_STR-POAKT sy-vline 
WA_RNDVV1_STR-POGES sy-vline 
WA_RNDVV1_STR-VTAGE sy-vline 
WA_RNDVV1_STR-ZTAGE sy-vline 
WA_RNDVV1_STR-VTTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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