ABAP Select data from SAP table RNIPP_PREG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNIPP_PREG
*  INTO TABLE @DATA(IT_RNIPP_PREG2).
*--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_RNIPP_PREG INDEX 1 INTO DATA(WA_RNIPP_PREG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNIPP_PREG>-MANDT = 1.
<RNIPP_PREG>-IPPNO = 1.
<RNIPP_PREG>-VKGID = 1.
<RNIPP_PREG>-EINRI = 1.
<RNIPP_PREG>-IPID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNIPP_PREG-LFDVV, sy-vline,
  WA_RNIPP_PREG-KNAME, sy-vline,
  WA_RNIPP_PREG-VNUMM, sy-vline,
  WA_RNIPP_PREG-RANGF, sy-vline,
  WA_RNIPP_PREG-MGART, sy-vline,
  WA_RNIPP_PREG-VZUZA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNIPP_PREG 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_RNIPP_PREG 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_RNIPP_PREG INTO WA_RNIPP_PREG.


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

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

*Conversion exit RANGF, internal->external for field RANGF
CALL FUNCTION 'CONVERSION_EXIT_RANGF_OUTPUT'
  EXPORTING
    input =                      WA_RNIPP_PREG-RANGF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNIPP_PREG-RANGF.
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_RNIPP_PREG_STR, 
MANDT TYPE STRING,
IPPNO TYPE STRING,
VKGID TYPE STRING,
EINRI TYPE STRING,
IPID TYPE STRING,
LFDVV TYPE STRING,
KNAME TYPE STRING,
VNUMM TYPE STRING,
RANGF TYPE STRING,
MGART TYPE STRING,
VZUZA TYPE STRING,
VERBI TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
VKNR TYPE STRING,
VSTAT TYPE STRING,
VSTER TYPE STRING,
VSCOD TYPE STRING,
KVDAT TYPE STRING,
PCARD TYPE STRING,
VKZML TYPE STRING,
VKTITEL TYPE STRING,
VKVNAM TYPE STRING,
VKNZU TYPE STRING,
VKNNAM TYPE STRING,
VKGBDAT TYPE STRING,
VKSTRAS TYPE STRING,
VKLAND TYPE STRING,
VKPLZ TYPE STRING,
VKORT TYPE STRING,
INSID TYPE STRING,
VKUNKNOWN_GBDAT TYPE STRING,
CORDERID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNIPP_PREG_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_RNIPP_PREG_STR-MANDT sy-vline 
WA_RNIPP_PREG_STR-IPPNO sy-vline 
WA_RNIPP_PREG_STR-VKGID sy-vline 
WA_RNIPP_PREG_STR-EINRI sy-vline 
WA_RNIPP_PREG_STR-IPID sy-vline 
WA_RNIPP_PREG_STR-LFDVV sy-vline 
WA_RNIPP_PREG_STR-KNAME sy-vline 
WA_RNIPP_PREG_STR-VNUMM sy-vline 
WA_RNIPP_PREG_STR-RANGF sy-vline 
WA_RNIPP_PREG_STR-MGART sy-vline 
WA_RNIPP_PREG_STR-VZUZA sy-vline 
WA_RNIPP_PREG_STR-VERBI sy-vline 
WA_RNIPP_PREG_STR-ERDAT sy-vline 
WA_RNIPP_PREG_STR-ERUSR sy-vline 
WA_RNIPP_PREG_STR-UPDAT sy-vline 
WA_RNIPP_PREG_STR-UPUSR sy-vline 
WA_RNIPP_PREG_STR-STORN sy-vline 
WA_RNIPP_PREG_STR-STUSR sy-vline 
WA_RNIPP_PREG_STR-STDAT sy-vline 
WA_RNIPP_PREG_STR-VKNR sy-vline 
WA_RNIPP_PREG_STR-VSTAT sy-vline 
WA_RNIPP_PREG_STR-VSTER sy-vline 
WA_RNIPP_PREG_STR-VSCOD sy-vline 
WA_RNIPP_PREG_STR-KVDAT sy-vline 
WA_RNIPP_PREG_STR-PCARD sy-vline 
WA_RNIPP_PREG_STR-VKZML sy-vline 
WA_RNIPP_PREG_STR-VKTITEL sy-vline 
WA_RNIPP_PREG_STR-VKVNAM sy-vline 
WA_RNIPP_PREG_STR-VKNZU sy-vline 
WA_RNIPP_PREG_STR-VKNNAM sy-vline 
WA_RNIPP_PREG_STR-VKGBDAT sy-vline 
WA_RNIPP_PREG_STR-VKSTRAS sy-vline 
WA_RNIPP_PREG_STR-VKLAND sy-vline 
WA_RNIPP_PREG_STR-VKPLZ sy-vline 
WA_RNIPP_PREG_STR-VKORT sy-vline 
WA_RNIPP_PREG_STR-INSID sy-vline 
WA_RNIPP_PREG_STR-VKUNKNOWN_GBDAT sy-vline 
WA_RNIPP_PREG_STR-CORDERID sy-vline      INTO ld_text SEPARATED BY SPACE.

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