ABAP Select data from SAP table RNPAT_VNDOC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNPAT_VNDOC 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_VNDOC. 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_VNDOC 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_VNDOC TYPE STANDARD TABLE OF RNPAT_VNDOC,
      WA_RNPAT_VNDOC TYPE RNPAT_VNDOC,
      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_VNDOC> TYPE RNPAT_VNDOC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPAT_VNDOC
*  INTO TABLE @DATA(IT_RNPAT_VNDOC2).
*--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_VNDOC INDEX 1 INTO DATA(WA_RNPAT_VNDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPAT_VNDOC>-MANDT = 1.
<RNPAT_VNDOC>-DOKAR = 1.
<RNPAT_VNDOC>-DOKNR = 1.
<RNPAT_VNDOC>-DOKVR = 1.
<RNPAT_VNDOC>-DOKTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPAT_VNDOC-LFDDOK, sy-vline,
  WA_RNPAT_VNDOC-ORGFORM, sy-vline,
  WA_RNPAT_VNDOC-EINRI, sy-vline,
  WA_RNPAT_VNDOC-PATNR, sy-vline,
  WA_RNPAT_VNDOC-FALNR, sy-vline,
  WA_RNPAT_VNDOC-FALAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPAT_VNDOC 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_VNDOC 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_VNDOC INTO WA_RNPAT_VNDOC.


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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field STANDORT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPAT_VNDOC-STANDORT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPAT_VNDOC-STANDORT.
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_RNPAT_VNDOC_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
LFDDOK TYPE STRING,
ORGFORM TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
FALAR TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
ORGDO TYPE STRING,
LFDBEW TYPE STRING,
STORN TYPE STRING,
MEDOK TYPE STRING,
ARCHIV TYPE STRING,
STANDORT TYPE STRING,
ROLLNO TYPE STRING,
MICROF TYPE STRING,
EXTNR TYPE STRING,
INFOMR TYPE STRING,
TEMPMR TYPE STRING,
ALBUM TYPE STRING,
MFYEAR TYPE STRING,
REDO_KZ TYPE STRING,
GSCHL TYPE STRING,
NNAME TYPE STRING,
NNAMS TYPE STRING,
VNAME TYPE STRING,
VNAMS TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
GBDAT TYPE STRING,
PZIFF TYPE STRING,
PATEX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPAT_VNDOC_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_VNDOC_STR-MANDT sy-vline 
WA_RNPAT_VNDOC_STR-DOKAR sy-vline 
WA_RNPAT_VNDOC_STR-DOKNR sy-vline 
WA_RNPAT_VNDOC_STR-DOKVR sy-vline 
WA_RNPAT_VNDOC_STR-DOKTL sy-vline 
WA_RNPAT_VNDOC_STR-LFDDOK sy-vline 
WA_RNPAT_VNDOC_STR-ORGFORM sy-vline 
WA_RNPAT_VNDOC_STR-EINRI sy-vline 
WA_RNPAT_VNDOC_STR-PATNR sy-vline 
WA_RNPAT_VNDOC_STR-FALNR sy-vline 
WA_RNPAT_VNDOC_STR-FALAR sy-vline 
WA_RNPAT_VNDOC_STR-ORGFA sy-vline 
WA_RNPAT_VNDOC_STR-ORGPF sy-vline 
WA_RNPAT_VNDOC_STR-ORGDO sy-vline 
WA_RNPAT_VNDOC_STR-LFDBEW sy-vline 
WA_RNPAT_VNDOC_STR-STORN sy-vline 
WA_RNPAT_VNDOC_STR-MEDOK sy-vline 
WA_RNPAT_VNDOC_STR-ARCHIV sy-vline 
WA_RNPAT_VNDOC_STR-STANDORT sy-vline 
WA_RNPAT_VNDOC_STR-ROLLNO sy-vline 
WA_RNPAT_VNDOC_STR-MICROF sy-vline 
WA_RNPAT_VNDOC_STR-EXTNR sy-vline 
WA_RNPAT_VNDOC_STR-INFOMR sy-vline 
WA_RNPAT_VNDOC_STR-TEMPMR sy-vline 
WA_RNPAT_VNDOC_STR-ALBUM sy-vline 
WA_RNPAT_VNDOC_STR-MFYEAR sy-vline 
WA_RNPAT_VNDOC_STR-REDO_KZ sy-vline 
WA_RNPAT_VNDOC_STR-GSCHL sy-vline 
WA_RNPAT_VNDOC_STR-NNAME sy-vline 
WA_RNPAT_VNDOC_STR-NNAMS sy-vline 
WA_RNPAT_VNDOC_STR-VNAME sy-vline 
WA_RNPAT_VNDOC_STR-VNAMS sy-vline 
WA_RNPAT_VNDOC_STR-TITEL sy-vline 
WA_RNPAT_VNDOC_STR-NAMZU sy-vline 
WA_RNPAT_VNDOC_STR-VORSW sy-vline 
WA_RNPAT_VNDOC_STR-GBDAT sy-vline 
WA_RNPAT_VNDOC_STR-PZIFF sy-vline 
WA_RNPAT_VNDOC_STR-PATEX sy-vline      INTO ld_text SEPARATED BY SPACE.

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